| // Copyright 2014 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #if V8_TARGET_ARCH_S390 |
| |
| #include "src/code-stubs.h" |
| #include "src/api-arguments.h" |
| #include "src/base/bits.h" |
| #include "src/bootstrapper.h" |
| #include "src/codegen.h" |
| #include "src/ic/handler-compiler.h" |
| #include "src/ic/ic.h" |
| #include "src/ic/stub-cache.h" |
| #include "src/isolate.h" |
| #include "src/regexp/jsregexp.h" |
| #include "src/regexp/regexp-macro-assembler.h" |
| #include "src/runtime/runtime.h" |
| #include "src/s390/code-stubs-s390.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| #define __ ACCESS_MASM(masm) |
| |
| void ArrayNArgumentsConstructorStub::Generate(MacroAssembler* masm) { |
| __ ShiftLeftP(r1, r2, Operand(kPointerSizeLog2)); |
| __ StoreP(r3, MemOperand(sp, r1)); |
| __ push(r3); |
| __ push(r4); |
| __ AddP(r2, r2, Operand(3)); |
| __ TailCallRuntime(Runtime::kNewArray); |
| } |
| |
| void FastArrayPushStub::InitializeDescriptor(CodeStubDescriptor* descriptor) { |
| Address deopt_handler = Runtime::FunctionForId(Runtime::kArrayPush)->entry; |
| descriptor->Initialize(r2, deopt_handler, -1, JS_FUNCTION_STUB_MODE); |
| } |
| |
| void FastFunctionBindStub::InitializeDescriptor( |
| CodeStubDescriptor* descriptor) { |
| Address deopt_handler = Runtime::FunctionForId(Runtime::kFunctionBind)->entry; |
| descriptor->Initialize(r2, deopt_handler, -1, JS_FUNCTION_STUB_MODE); |
| } |
| |
| static void EmitIdenticalObjectComparison(MacroAssembler* masm, Label* slow, |
| Condition cond); |
| static void EmitSmiNonsmiComparison(MacroAssembler* masm, Register lhs, |
| Register rhs, Label* lhs_not_nan, |
| Label* slow, bool strict); |
| static void EmitStrictTwoHeapObjectCompare(MacroAssembler* masm, Register lhs, |
| Register rhs); |
| |
| void HydrogenCodeStub::GenerateLightweightMiss(MacroAssembler* masm, |
| ExternalReference miss) { |
| // Update the static counter each time a new code stub is generated. |
| isolate()->counters()->code_stubs()->Increment(); |
| |
| CallInterfaceDescriptor descriptor = GetCallInterfaceDescriptor(); |
| int param_count = descriptor.GetRegisterParameterCount(); |
| { |
| // Call the runtime system in a fresh internal frame. |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| DCHECK(param_count == 0 || |
| r2.is(descriptor.GetRegisterParameter(param_count - 1))); |
| // Push arguments |
| for (int i = 0; i < param_count; ++i) { |
| __ push(descriptor.GetRegisterParameter(i)); |
| } |
| __ CallExternalReference(miss, param_count); |
| } |
| |
| __ Ret(); |
| } |
| |
| void DoubleToIStub::Generate(MacroAssembler* masm) { |
| Label out_of_range, only_low, negate, done, fastpath_done; |
| Register input_reg = source(); |
| Register result_reg = destination(); |
| DCHECK(is_truncating()); |
| |
| int double_offset = offset(); |
| |
| // Immediate values for this stub fit in instructions, so it's safe to use ip. |
| Register scratch = GetRegisterThatIsNotOneOf(input_reg, result_reg); |
| Register scratch_low = |
| GetRegisterThatIsNotOneOf(input_reg, result_reg, scratch); |
| Register scratch_high = |
| GetRegisterThatIsNotOneOf(input_reg, result_reg, scratch, scratch_low); |
| DoubleRegister double_scratch = kScratchDoubleReg; |
| |
| __ push(scratch); |
| // Account for saved regs if input is sp. |
| if (input_reg.is(sp)) double_offset += kPointerSize; |
| |
| if (!skip_fastpath()) { |
| // Load double input. |
| __ LoadDouble(double_scratch, MemOperand(input_reg, double_offset)); |
| |
| // Do fast-path convert from double to int. |
| __ ConvertDoubleToInt64(double_scratch, |
| #if !V8_TARGET_ARCH_S390X |
| scratch, |
| #endif |
| result_reg, d0); |
| |
| // Test for overflow |
| #if V8_TARGET_ARCH_S390X |
| __ TestIfInt32(result_reg, r0); |
| #else |
| __ TestIfInt32(scratch, result_reg, r0); |
| #endif |
| __ beq(&fastpath_done, Label::kNear); |
| } |
| |
| __ Push(scratch_high, scratch_low); |
| // Account for saved regs if input is sp. |
| if (input_reg.is(sp)) double_offset += 2 * kPointerSize; |
| |
| __ LoadlW(scratch_high, |
| MemOperand(input_reg, double_offset + Register::kExponentOffset)); |
| __ LoadlW(scratch_low, |
| MemOperand(input_reg, double_offset + Register::kMantissaOffset)); |
| |
| __ ExtractBitMask(scratch, scratch_high, HeapNumber::kExponentMask); |
| // Load scratch with exponent - 1. This is faster than loading |
| // with exponent because Bias + 1 = 1024 which is a *S390* immediate value. |
| STATIC_ASSERT(HeapNumber::kExponentBias + 1 == 1024); |
| __ SubP(scratch, Operand(HeapNumber::kExponentBias + 1)); |
| // If exponent is greater than or equal to 84, the 32 less significant |
| // bits are 0s (2^84 = 1, 52 significant bits, 32 uncoded bits), |
| // the result is 0. |
| // Compare exponent with 84 (compare exponent - 1 with 83). |
| __ CmpP(scratch, Operand(83)); |
| __ bge(&out_of_range, Label::kNear); |
| |
| // If we reach this code, 31 <= exponent <= 83. |
| // So, we don't have to handle cases where 0 <= exponent <= 20 for |
| // which we would need to shift right the high part of the mantissa. |
| // Scratch contains exponent - 1. |
| // Load scratch with 52 - exponent (load with 51 - (exponent - 1)). |
| __ Load(r0, Operand(51)); |
| __ SubP(scratch, r0, scratch); |
| __ CmpP(scratch, Operand::Zero()); |
| __ ble(&only_low, Label::kNear); |
| // 21 <= exponent <= 51, shift scratch_low and scratch_high |
| // to generate the result. |
| __ ShiftRight(scratch_low, scratch_low, scratch); |
| // Scratch contains: 52 - exponent. |
| // We needs: exponent - 20. |
| // So we use: 32 - scratch = 32 - 52 + exponent = exponent - 20. |
| __ Load(r0, Operand(32)); |
| __ SubP(scratch, r0, scratch); |
| __ ExtractBitMask(result_reg, scratch_high, HeapNumber::kMantissaMask); |
| // Set the implicit 1 before the mantissa part in scratch_high. |
| STATIC_ASSERT(HeapNumber::kMantissaBitsInTopWord >= 16); |
| __ Load(r0, Operand(1 << ((HeapNumber::kMantissaBitsInTopWord)-16))); |
| __ ShiftLeftP(r0, r0, Operand(16)); |
| __ OrP(result_reg, result_reg, r0); |
| __ ShiftLeft(r0, result_reg, scratch); |
| __ OrP(result_reg, scratch_low, r0); |
| __ b(&negate, Label::kNear); |
| |
| __ bind(&out_of_range); |
| __ mov(result_reg, Operand::Zero()); |
| __ b(&done, Label::kNear); |
| |
| __ bind(&only_low); |
| // 52 <= exponent <= 83, shift only scratch_low. |
| // On entry, scratch contains: 52 - exponent. |
| __ LoadComplementRR(scratch, scratch); |
| __ ShiftLeft(result_reg, scratch_low, scratch); |
| |
| __ bind(&negate); |
| // If input was positive, scratch_high ASR 31 equals 0 and |
| // scratch_high LSR 31 equals zero. |
| // New result = (result eor 0) + 0 = result. |
| // If the input was negative, we have to negate the result. |
| // Input_high ASR 31 equals 0xffffffff and scratch_high LSR 31 equals 1. |
| // New result = (result eor 0xffffffff) + 1 = 0 - result. |
| __ ShiftRightArith(r0, scratch_high, Operand(31)); |
| #if V8_TARGET_ARCH_S390X |
| __ lgfr(r0, r0); |
| __ ShiftRightP(r0, r0, Operand(32)); |
| #endif |
| __ XorP(result_reg, r0); |
| __ ShiftRight(r0, scratch_high, Operand(31)); |
| __ AddP(result_reg, r0); |
| |
| __ bind(&done); |
| __ Pop(scratch_high, scratch_low); |
| |
| __ bind(&fastpath_done); |
| __ pop(scratch); |
| |
| __ Ret(); |
| } |
| |
| // Handle the case where the lhs and rhs are the same object. |
| // Equality is almost reflexive (everything but NaN), so this is a test |
| // for "identity and not NaN". |
| static void EmitIdenticalObjectComparison(MacroAssembler* masm, Label* slow, |
| Condition cond) { |
| Label not_identical; |
| Label heap_number, return_equal; |
| __ CmpP(r2, r3); |
| __ bne(¬_identical); |
| |
| // Test for NaN. Sadly, we can't just compare to Factory::nan_value(), |
| // so we do the second best thing - test it ourselves. |
| // They are both equal and they are not both Smis so both of them are not |
| // Smis. If it's not a heap number, then return equal. |
| if (cond == lt || cond == gt) { |
| // Call runtime on identical JSObjects. |
| __ CompareObjectType(r2, r6, r6, FIRST_JS_RECEIVER_TYPE); |
| __ bge(slow); |
| // Call runtime on identical symbols since we need to throw a TypeError. |
| __ CmpP(r6, Operand(SYMBOL_TYPE)); |
| __ beq(slow); |
| // Call runtime on identical SIMD values since we must throw a TypeError. |
| __ CmpP(r6, Operand(SIMD128_VALUE_TYPE)); |
| __ beq(slow); |
| } else { |
| __ CompareObjectType(r2, r6, r6, HEAP_NUMBER_TYPE); |
| __ beq(&heap_number); |
| // Comparing JS objects with <=, >= is complicated. |
| if (cond != eq) { |
| __ CmpP(r6, Operand(FIRST_JS_RECEIVER_TYPE)); |
| __ bge(slow); |
| // Call runtime on identical symbols since we need to throw a TypeError. |
| __ CmpP(r6, Operand(SYMBOL_TYPE)); |
| __ beq(slow); |
| // Call runtime on identical SIMD values since we must throw a TypeError. |
| __ CmpP(r6, Operand(SIMD128_VALUE_TYPE)); |
| __ beq(slow); |
| // Normally here we fall through to return_equal, but undefined is |
| // special: (undefined == undefined) == true, but |
| // (undefined <= undefined) == false! See ECMAScript 11.8.5. |
| if (cond == le || cond == ge) { |
| __ CmpP(r6, Operand(ODDBALL_TYPE)); |
| __ bne(&return_equal); |
| __ CompareRoot(r2, Heap::kUndefinedValueRootIndex); |
| __ bne(&return_equal); |
| if (cond == le) { |
| // undefined <= undefined should fail. |
| __ LoadImmP(r2, Operand(GREATER)); |
| } else { |
| // undefined >= undefined should fail. |
| __ LoadImmP(r2, Operand(LESS)); |
| } |
| __ Ret(); |
| } |
| } |
| } |
| |
| __ bind(&return_equal); |
| if (cond == lt) { |
| __ LoadImmP(r2, Operand(GREATER)); // Things aren't less than themselves. |
| } else if (cond == gt) { |
| __ LoadImmP(r2, Operand(LESS)); // Things aren't greater than themselves. |
| } else { |
| __ LoadImmP(r2, Operand(EQUAL)); // Things are <=, >=, ==, === themselves |
| } |
| __ Ret(); |
| |
| // For less and greater we don't have to check for NaN since the result of |
| // x < x is false regardless. For the others here is some code to check |
| // for NaN. |
| if (cond != lt && cond != gt) { |
| __ bind(&heap_number); |
| // It is a heap number, so return non-equal if it's NaN and equal if it's |
| // not NaN. |
| |
| // The representation of NaN values has all exponent bits (52..62) set, |
| // and not all mantissa bits (0..51) clear. |
| // Read top bits of double representation (second word of value). |
| __ LoadlW(r4, FieldMemOperand(r2, HeapNumber::kExponentOffset)); |
| // Test that exponent bits are all set. |
| STATIC_ASSERT(HeapNumber::kExponentMask == 0x7ff00000u); |
| __ ExtractBitMask(r5, r4, HeapNumber::kExponentMask); |
| __ CmpLogicalP(r5, Operand(0x7ff)); |
| __ bne(&return_equal); |
| |
| // Shift out flag and all exponent bits, retaining only mantissa. |
| __ sll(r4, Operand(HeapNumber::kNonMantissaBitsInTopWord)); |
| // Or with all low-bits of mantissa. |
| __ LoadlW(r5, FieldMemOperand(r2, HeapNumber::kMantissaOffset)); |
| __ OrP(r2, r5, r4); |
| __ CmpP(r2, Operand::Zero()); |
| // For equal we already have the right value in r2: Return zero (equal) |
| // if all bits in mantissa are zero (it's an Infinity) and non-zero if |
| // not (it's a NaN). For <= and >= we need to load r0 with the failing |
| // value if it's a NaN. |
| if (cond != eq) { |
| Label not_equal; |
| __ bne(¬_equal, Label::kNear); |
| // All-zero means Infinity means equal. |
| __ Ret(); |
| __ bind(¬_equal); |
| if (cond == le) { |
| __ LoadImmP(r2, Operand(GREATER)); // NaN <= NaN should fail. |
| } else { |
| __ LoadImmP(r2, Operand(LESS)); // NaN >= NaN should fail. |
| } |
| } |
| __ Ret(); |
| } |
| // No fall through here. |
| |
| __ bind(¬_identical); |
| } |
| |
| // See comment at call site. |
| static void EmitSmiNonsmiComparison(MacroAssembler* masm, Register lhs, |
| Register rhs, Label* lhs_not_nan, |
| Label* slow, bool strict) { |
| DCHECK((lhs.is(r2) && rhs.is(r3)) || (lhs.is(r3) && rhs.is(r2))); |
| |
| Label rhs_is_smi; |
| __ JumpIfSmi(rhs, &rhs_is_smi); |
| |
| // Lhs is a Smi. Check whether the rhs is a heap number. |
| __ CompareObjectType(rhs, r5, r6, HEAP_NUMBER_TYPE); |
| if (strict) { |
| // If rhs is not a number and lhs is a Smi then strict equality cannot |
| // succeed. Return non-equal |
| // If rhs is r2 then there is already a non zero value in it. |
| Label skip; |
| __ beq(&skip, Label::kNear); |
| if (!rhs.is(r2)) { |
| __ mov(r2, Operand(NOT_EQUAL)); |
| } |
| __ Ret(); |
| __ bind(&skip); |
| } else { |
| // Smi compared non-strictly with a non-Smi non-heap-number. Call |
| // the runtime. |
| __ bne(slow); |
| } |
| |
| // Lhs is a smi, rhs is a number. |
| // Convert lhs to a double in d7. |
| __ SmiToDouble(d7, lhs); |
| // Load the double from rhs, tagged HeapNumber r2, to d6. |
| __ LoadDouble(d6, FieldMemOperand(rhs, HeapNumber::kValueOffset)); |
| |
| // We now have both loaded as doubles but we can skip the lhs nan check |
| // since it's a smi. |
| __ b(lhs_not_nan); |
| |
| __ bind(&rhs_is_smi); |
| // Rhs is a smi. Check whether the non-smi lhs is a heap number. |
| __ CompareObjectType(lhs, r6, r6, HEAP_NUMBER_TYPE); |
| if (strict) { |
| // If lhs is not a number and rhs is a smi then strict equality cannot |
| // succeed. Return non-equal. |
| // If lhs is r2 then there is already a non zero value in it. |
| Label skip; |
| __ beq(&skip, Label::kNear); |
| if (!lhs.is(r2)) { |
| __ mov(r2, Operand(NOT_EQUAL)); |
| } |
| __ Ret(); |
| __ bind(&skip); |
| } else { |
| // Smi compared non-strictly with a non-smi non-heap-number. Call |
| // the runtime. |
| __ bne(slow); |
| } |
| |
| // Rhs is a smi, lhs is a heap number. |
| // Load the double from lhs, tagged HeapNumber r3, to d7. |
| __ LoadDouble(d7, FieldMemOperand(lhs, HeapNumber::kValueOffset)); |
| // Convert rhs to a double in d6. |
| __ SmiToDouble(d6, rhs); |
| // Fall through to both_loaded_as_doubles. |
| } |
| |
| // See comment at call site. |
| static void EmitStrictTwoHeapObjectCompare(MacroAssembler* masm, Register lhs, |
| Register rhs) { |
| DCHECK((lhs.is(r2) && rhs.is(r3)) || (lhs.is(r3) && rhs.is(r2))); |
| |
| // If either operand is a JS object or an oddball value, then they are |
| // not equal since their pointers are different. |
| // There is no test for undetectability in strict equality. |
| STATIC_ASSERT(LAST_TYPE == LAST_JS_RECEIVER_TYPE); |
| Label first_non_object; |
| // Get the type of the first operand into r4 and compare it with |
| // FIRST_JS_RECEIVER_TYPE. |
| __ CompareObjectType(rhs, r4, r4, FIRST_JS_RECEIVER_TYPE); |
| __ blt(&first_non_object, Label::kNear); |
| |
| // Return non-zero (r2 is not zero) |
| Label return_not_equal; |
| __ bind(&return_not_equal); |
| __ Ret(); |
| |
| __ bind(&first_non_object); |
| // Check for oddballs: true, false, null, undefined. |
| __ CmpP(r4, Operand(ODDBALL_TYPE)); |
| __ beq(&return_not_equal); |
| |
| __ CompareObjectType(lhs, r5, r5, FIRST_JS_RECEIVER_TYPE); |
| __ bge(&return_not_equal); |
| |
| // Check for oddballs: true, false, null, undefined. |
| __ CmpP(r5, Operand(ODDBALL_TYPE)); |
| __ beq(&return_not_equal); |
| |
| // Now that we have the types we might as well check for |
| // internalized-internalized. |
| STATIC_ASSERT(kInternalizedTag == 0 && kStringTag == 0); |
| __ OrP(r4, r4, r5); |
| __ AndP(r0, r4, Operand(kIsNotStringMask | kIsNotInternalizedMask)); |
| __ beq(&return_not_equal); |
| } |
| |
| // See comment at call site. |
| static void EmitCheckForTwoHeapNumbers(MacroAssembler* masm, Register lhs, |
| Register rhs, |
| Label* both_loaded_as_doubles, |
| Label* not_heap_numbers, Label* slow) { |
| DCHECK((lhs.is(r2) && rhs.is(r3)) || (lhs.is(r3) && rhs.is(r2))); |
| |
| __ CompareObjectType(rhs, r5, r4, HEAP_NUMBER_TYPE); |
| __ bne(not_heap_numbers); |
| __ LoadP(r4, FieldMemOperand(lhs, HeapObject::kMapOffset)); |
| __ CmpP(r4, r5); |
| __ bne(slow); // First was a heap number, second wasn't. Go slow case. |
| |
| // Both are heap numbers. Load them up then jump to the code we have |
| // for that. |
| __ LoadDouble(d6, FieldMemOperand(rhs, HeapNumber::kValueOffset)); |
| __ LoadDouble(d7, FieldMemOperand(lhs, HeapNumber::kValueOffset)); |
| |
| __ b(both_loaded_as_doubles); |
| } |
| |
| // Fast negative check for internalized-to-internalized equality or receiver |
| // equality. Also handles the undetectable receiver to null/undefined |
| // comparison. |
| static void EmitCheckForInternalizedStringsOrObjects(MacroAssembler* masm, |
| Register lhs, Register rhs, |
| Label* possible_strings, |
| Label* runtime_call) { |
| DCHECK((lhs.is(r2) && rhs.is(r3)) || (lhs.is(r3) && rhs.is(r2))); |
| |
| // r4 is object type of rhs. |
| Label object_test, return_equal, return_unequal, undetectable; |
| STATIC_ASSERT(kInternalizedTag == 0 && kStringTag == 0); |
| __ mov(r0, Operand(kIsNotStringMask)); |
| __ AndP(r0, r4); |
| __ bne(&object_test, Label::kNear); |
| __ mov(r0, Operand(kIsNotInternalizedMask)); |
| __ AndP(r0, r4); |
| __ bne(possible_strings); |
| __ CompareObjectType(lhs, r5, r5, FIRST_NONSTRING_TYPE); |
| __ bge(runtime_call); |
| __ mov(r0, Operand(kIsNotInternalizedMask)); |
| __ AndP(r0, r5); |
| __ bne(possible_strings); |
| |
| // Both are internalized. We already checked they weren't the same pointer so |
| // they are not equal. Return non-equal by returning the non-zero object |
| // pointer in r2. |
| __ Ret(); |
| |
| __ bind(&object_test); |
| __ LoadP(r4, FieldMemOperand(lhs, HeapObject::kMapOffset)); |
| __ LoadP(r5, FieldMemOperand(rhs, HeapObject::kMapOffset)); |
| __ LoadlB(r6, FieldMemOperand(r4, Map::kBitFieldOffset)); |
| __ LoadlB(r7, FieldMemOperand(r5, Map::kBitFieldOffset)); |
| __ AndP(r0, r6, Operand(1 << Map::kIsUndetectable)); |
| __ bne(&undetectable); |
| __ AndP(r0, r7, Operand(1 << Map::kIsUndetectable)); |
| __ bne(&return_unequal); |
| |
| __ CompareInstanceType(r4, r4, FIRST_JS_RECEIVER_TYPE); |
| __ blt(runtime_call); |
| __ CompareInstanceType(r5, r5, FIRST_JS_RECEIVER_TYPE); |
| __ blt(runtime_call); |
| |
| __ bind(&return_unequal); |
| // Return non-equal by returning the non-zero object pointer in r2. |
| __ Ret(); |
| |
| __ bind(&undetectable); |
| __ AndP(r0, r7, Operand(1 << Map::kIsUndetectable)); |
| __ beq(&return_unequal); |
| |
| // If both sides are JSReceivers, then the result is false according to |
| // the HTML specification, which says that only comparisons with null or |
| // undefined are affected by special casing for document.all. |
| __ CompareInstanceType(r4, r4, ODDBALL_TYPE); |
| __ beq(&return_equal); |
| __ CompareInstanceType(r5, r5, ODDBALL_TYPE); |
| __ bne(&return_unequal); |
| |
| __ bind(&return_equal); |
| __ LoadImmP(r2, Operand(EQUAL)); |
| __ Ret(); |
| } |
| |
| static void CompareICStub_CheckInputType(MacroAssembler* masm, Register input, |
| Register scratch, |
| CompareICState::State expected, |
| Label* fail) { |
| Label ok; |
| if (expected == CompareICState::SMI) { |
| __ JumpIfNotSmi(input, fail); |
| } else if (expected == CompareICState::NUMBER) { |
| __ JumpIfSmi(input, &ok); |
| __ CheckMap(input, scratch, Heap::kHeapNumberMapRootIndex, fail, |
| DONT_DO_SMI_CHECK); |
| } |
| // We could be strict about internalized/non-internalized here, but as long as |
| // hydrogen doesn't care, the stub doesn't have to care either. |
| __ bind(&ok); |
| } |
| |
| // On entry r3 and r4 are the values to be compared. |
| // On exit r2 is 0, positive or negative to indicate the result of |
| // the comparison. |
| void CompareICStub::GenerateGeneric(MacroAssembler* masm) { |
| Register lhs = r3; |
| Register rhs = r2; |
| Condition cc = GetCondition(); |
| |
| Label miss; |
| CompareICStub_CheckInputType(masm, lhs, r4, left(), &miss); |
| CompareICStub_CheckInputType(masm, rhs, r5, right(), &miss); |
| |
| Label slow; // Call builtin. |
| Label not_smis, both_loaded_as_doubles, lhs_not_nan; |
| |
| Label not_two_smis, smi_done; |
| __ OrP(r4, r3, r2); |
| __ JumpIfNotSmi(r4, ¬_two_smis); |
| __ SmiUntag(r3); |
| __ SmiUntag(r2); |
| __ SubP(r2, r3, r2); |
| __ Ret(); |
| __ bind(¬_two_smis); |
| |
| // NOTICE! This code is only reached after a smi-fast-case check, so |
| // it is certain that at least one operand isn't a smi. |
| |
| // Handle the case where the objects are identical. Either returns the answer |
| // or goes to slow. Only falls through if the objects were not identical. |
| EmitIdenticalObjectComparison(masm, &slow, cc); |
| |
| // If either is a Smi (we know that not both are), then they can only |
| // be strictly equal if the other is a HeapNumber. |
| STATIC_ASSERT(kSmiTag == 0); |
| DCHECK_EQ(static_cast<Smi*>(0), Smi::FromInt(0)); |
| __ AndP(r4, lhs, rhs); |
| __ JumpIfNotSmi(r4, ¬_smis); |
| // One operand is a smi. EmitSmiNonsmiComparison generates code that can: |
| // 1) Return the answer. |
| // 2) Go to slow. |
| // 3) Fall through to both_loaded_as_doubles. |
| // 4) Jump to lhs_not_nan. |
| // In cases 3 and 4 we have found out we were dealing with a number-number |
| // comparison. The double values of the numbers have been loaded |
| // into d7 and d6. |
| EmitSmiNonsmiComparison(masm, lhs, rhs, &lhs_not_nan, &slow, strict()); |
| |
| __ bind(&both_loaded_as_doubles); |
| // The arguments have been converted to doubles and stored in d6 and d7 |
| __ bind(&lhs_not_nan); |
| Label no_nan; |
| __ cdbr(d7, d6); |
| |
| Label nan, equal, less_than; |
| __ bunordered(&nan); |
| __ beq(&equal, Label::kNear); |
| __ blt(&less_than, Label::kNear); |
| __ LoadImmP(r2, Operand(GREATER)); |
| __ Ret(); |
| __ bind(&equal); |
| __ LoadImmP(r2, Operand(EQUAL)); |
| __ Ret(); |
| __ bind(&less_than); |
| __ LoadImmP(r2, Operand(LESS)); |
| __ Ret(); |
| |
| __ bind(&nan); |
| // If one of the sides was a NaN then the v flag is set. Load r2 with |
| // whatever it takes to make the comparison fail, since comparisons with NaN |
| // always fail. |
| if (cc == lt || cc == le) { |
| __ LoadImmP(r2, Operand(GREATER)); |
| } else { |
| __ LoadImmP(r2, Operand(LESS)); |
| } |
| __ Ret(); |
| |
| __ bind(¬_smis); |
| // At this point we know we are dealing with two different objects, |
| // and neither of them is a Smi. The objects are in rhs_ and lhs_. |
| if (strict()) { |
| // This returns non-equal for some object types, or falls through if it |
| // was not lucky. |
| EmitStrictTwoHeapObjectCompare(masm, lhs, rhs); |
| } |
| |
| Label check_for_internalized_strings; |
| Label flat_string_check; |
| // Check for heap-number-heap-number comparison. Can jump to slow case, |
| // or load both doubles into r2, r3, r4, r5 and jump to the code that handles |
| // that case. If the inputs are not doubles then jumps to |
| // check_for_internalized_strings. |
| // In this case r4 will contain the type of rhs_. Never falls through. |
| EmitCheckForTwoHeapNumbers(masm, lhs, rhs, &both_loaded_as_doubles, |
| &check_for_internalized_strings, |
| &flat_string_check); |
| |
| __ bind(&check_for_internalized_strings); |
| // In the strict case the EmitStrictTwoHeapObjectCompare already took care of |
| // internalized strings. |
| if (cc == eq && !strict()) { |
| // Returns an answer for two internalized strings or two detectable objects. |
| // Otherwise jumps to string case or not both strings case. |
| // Assumes that r4 is the type of rhs_ on entry. |
| EmitCheckForInternalizedStringsOrObjects(masm, lhs, rhs, &flat_string_check, |
| &slow); |
| } |
| |
| // Check for both being sequential one-byte strings, |
| // and inline if that is the case. |
| __ bind(&flat_string_check); |
| |
| __ JumpIfNonSmisNotBothSequentialOneByteStrings(lhs, rhs, r4, r5, &slow); |
| |
| __ IncrementCounter(isolate()->counters()->string_compare_native(), 1, r4, |
| r5); |
| if (cc == eq) { |
| StringHelper::GenerateFlatOneByteStringEquals(masm, lhs, rhs, r4, r5); |
| } else { |
| StringHelper::GenerateCompareFlatOneByteStrings(masm, lhs, rhs, r4, r5, r6); |
| } |
| // Never falls through to here. |
| |
| __ bind(&slow); |
| |
| if (cc == eq) { |
| { |
| FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL); |
| __ Push(lhs, rhs); |
| __ CallRuntime(strict() ? Runtime::kStrictEqual : Runtime::kEqual); |
| } |
| // Turn true into 0 and false into some non-zero value. |
| STATIC_ASSERT(EQUAL == 0); |
| __ LoadRoot(r3, Heap::kTrueValueRootIndex); |
| __ SubP(r2, r2, r3); |
| __ Ret(); |
| } else { |
| __ Push(lhs, rhs); |
| int ncr; // NaN compare result |
| if (cc == lt || cc == le) { |
| ncr = GREATER; |
| } else { |
| DCHECK(cc == gt || cc == ge); // remaining cases |
| ncr = LESS; |
| } |
| __ LoadSmiLiteral(r2, Smi::FromInt(ncr)); |
| __ push(r2); |
| |
| // Call the native; it returns -1 (less), 0 (equal), or 1 (greater) |
| // tagged as a small integer. |
| __ TailCallRuntime(Runtime::kCompare); |
| } |
| |
| __ bind(&miss); |
| GenerateMiss(masm); |
| } |
| |
| void StoreBufferOverflowStub::Generate(MacroAssembler* masm) { |
| // We don't allow a GC during a store buffer overflow so there is no need to |
| // store the registers in any particular way, but we do have to store and |
| // restore them. |
| __ MultiPush(kJSCallerSaved | r14.bit()); |
| if (save_doubles()) { |
| __ MultiPushDoubles(kCallerSavedDoubles); |
| } |
| const int argument_count = 1; |
| const int fp_argument_count = 0; |
| const Register scratch = r3; |
| |
| AllowExternalCallThatCantCauseGC scope(masm); |
| __ PrepareCallCFunction(argument_count, fp_argument_count, scratch); |
| __ mov(r2, Operand(ExternalReference::isolate_address(isolate()))); |
| __ CallCFunction(ExternalReference::store_buffer_overflow_function(isolate()), |
| argument_count); |
| if (save_doubles()) { |
| __ MultiPopDoubles(kCallerSavedDoubles); |
| } |
| __ MultiPop(kJSCallerSaved | r14.bit()); |
| __ Ret(); |
| } |
| |
| void StoreRegistersStateStub::Generate(MacroAssembler* masm) { |
| __ PushSafepointRegisters(); |
| __ b(r14); |
| } |
| |
| void RestoreRegistersStateStub::Generate(MacroAssembler* masm) { |
| __ PopSafepointRegisters(); |
| __ b(r14); |
| } |
| |
| void MathPowStub::Generate(MacroAssembler* masm) { |
| const Register base = r3; |
| const Register exponent = MathPowTaggedDescriptor::exponent(); |
| DCHECK(exponent.is(r4)); |
| const Register heapnumbermap = r7; |
| const Register heapnumber = r2; |
| const DoubleRegister double_base = d1; |
| const DoubleRegister double_exponent = d2; |
| const DoubleRegister double_result = d3; |
| const DoubleRegister double_scratch = d0; |
| const Register scratch = r1; |
| const Register scratch2 = r9; |
| |
| Label call_runtime, done, int_exponent; |
| if (exponent_type() == ON_STACK) { |
| Label base_is_smi, unpack_exponent; |
| // The exponent and base are supplied as arguments on the stack. |
| // This can only happen if the stub is called from non-optimized code. |
| // Load input parameters from stack to double registers. |
| __ LoadP(base, MemOperand(sp, 1 * kPointerSize)); |
| __ LoadP(exponent, MemOperand(sp, 0 * kPointerSize)); |
| |
| __ LoadRoot(heapnumbermap, Heap::kHeapNumberMapRootIndex); |
| |
| __ UntagAndJumpIfSmi(scratch, base, &base_is_smi); |
| __ LoadP(scratch, FieldMemOperand(base, JSObject::kMapOffset)); |
| __ CmpP(scratch, heapnumbermap); |
| __ bne(&call_runtime); |
| |
| __ LoadDouble(double_base, FieldMemOperand(base, HeapNumber::kValueOffset)); |
| __ b(&unpack_exponent, Label::kNear); |
| |
| __ bind(&base_is_smi); |
| __ ConvertIntToDouble(scratch, double_base); |
| __ bind(&unpack_exponent); |
| |
| __ UntagAndJumpIfSmi(scratch, exponent, &int_exponent); |
| __ LoadP(scratch, FieldMemOperand(exponent, JSObject::kMapOffset)); |
| __ CmpP(scratch, heapnumbermap); |
| __ bne(&call_runtime); |
| |
| __ LoadDouble(double_exponent, |
| FieldMemOperand(exponent, HeapNumber::kValueOffset)); |
| } else if (exponent_type() == TAGGED) { |
| // Base is already in double_base. |
| __ UntagAndJumpIfSmi(scratch, exponent, &int_exponent); |
| |
| __ LoadDouble(double_exponent, |
| FieldMemOperand(exponent, HeapNumber::kValueOffset)); |
| } |
| |
| if (exponent_type() != INTEGER) { |
| // Detect integer exponents stored as double. |
| __ TryDoubleToInt32Exact(scratch, double_exponent, scratch2, |
| double_scratch); |
| __ beq(&int_exponent, Label::kNear); |
| |
| if (exponent_type() == ON_STACK) { |
| // Detect square root case. Crankshaft detects constant +/-0.5 at |
| // compile time and uses DoMathPowHalf instead. We then skip this check |
| // for non-constant cases of +/-0.5 as these hardly occur. |
| Label not_plus_half, not_minus_inf1, not_minus_inf2; |
| |
| // Test for 0.5. |
| __ LoadDoubleLiteral(double_scratch, 0.5, scratch); |
| __ cdbr(double_exponent, double_scratch); |
| __ bne(¬_plus_half, Label::kNear); |
| |
| // Calculates square root of base. Check for the special case of |
| // Math.pow(-Infinity, 0.5) == Infinity (ECMA spec, 15.8.2.13). |
| __ LoadDoubleLiteral(double_scratch, -V8_INFINITY, scratch); |
| __ cdbr(double_base, double_scratch); |
| __ bne(¬_minus_inf1, Label::kNear); |
| __ lcdbr(double_result, double_scratch); |
| __ b(&done); |
| __ bind(¬_minus_inf1); |
| |
| // Add +0 to convert -0 to +0. |
| __ ldr(double_scratch, double_base); |
| __ lzdr(kDoubleRegZero); |
| __ adbr(double_scratch, kDoubleRegZero); |
| __ sqdbr(double_result, double_scratch); |
| __ b(&done); |
| |
| __ bind(¬_plus_half); |
| __ LoadDoubleLiteral(double_scratch, -0.5, scratch); |
| __ cdbr(double_exponent, double_scratch); |
| __ bne(&call_runtime); |
| |
| // Calculates square root of base. Check for the special case of |
| // Math.pow(-Infinity, -0.5) == 0 (ECMA spec, 15.8.2.13). |
| __ LoadDoubleLiteral(double_scratch, -V8_INFINITY, scratch); |
| __ cdbr(double_base, double_scratch); |
| __ bne(¬_minus_inf2, Label::kNear); |
| __ ldr(double_result, kDoubleRegZero); |
| __ b(&done); |
| __ bind(¬_minus_inf2); |
| |
| // Add +0 to convert -0 to +0. |
| __ ldr(double_scratch, double_base); |
| __ lzdr(kDoubleRegZero); |
| __ adbr(double_scratch, kDoubleRegZero); |
| __ LoadDoubleLiteral(double_result, 1.0, scratch); |
| __ sqdbr(double_scratch, double_scratch); |
| __ ddbr(double_result, double_scratch); |
| __ b(&done); |
| } |
| |
| __ push(r14); |
| { |
| AllowExternalCallThatCantCauseGC scope(masm); |
| __ PrepareCallCFunction(0, 2, scratch); |
| __ MovToFloatParameters(double_base, double_exponent); |
| __ CallCFunction( |
| ExternalReference::power_double_double_function(isolate()), 0, 2); |
| } |
| __ pop(r14); |
| __ MovFromFloatResult(double_result); |
| __ b(&done); |
| } |
| |
| // Calculate power with integer exponent. |
| __ bind(&int_exponent); |
| |
| // Get two copies of exponent in the registers scratch and exponent. |
| if (exponent_type() == INTEGER) { |
| __ LoadRR(scratch, exponent); |
| } else { |
| // Exponent has previously been stored into scratch as untagged integer. |
| __ LoadRR(exponent, scratch); |
| } |
| __ ldr(double_scratch, double_base); // Back up base. |
| __ LoadImmP(scratch2, Operand(1)); |
| __ ConvertIntToDouble(scratch2, double_result); |
| |
| // Get absolute value of exponent. |
| Label positive_exponent; |
| __ CmpP(scratch, Operand::Zero()); |
| __ bge(&positive_exponent, Label::kNear); |
| __ LoadComplementRR(scratch, scratch); |
| __ bind(&positive_exponent); |
| |
| Label while_true, no_carry, loop_end; |
| __ bind(&while_true); |
| __ mov(scratch2, Operand(1)); |
| __ AndP(scratch2, scratch); |
| __ beq(&no_carry, Label::kNear); |
| __ mdbr(double_result, double_scratch); |
| __ bind(&no_carry); |
| __ ShiftRightArithP(scratch, scratch, Operand(1)); |
| __ beq(&loop_end, Label::kNear); |
| __ mdbr(double_scratch, double_scratch); |
| __ b(&while_true); |
| __ bind(&loop_end); |
| |
| __ CmpP(exponent, Operand::Zero()); |
| __ bge(&done); |
| |
| // get 1/double_result: |
| __ ldr(double_scratch, double_result); |
| __ LoadImmP(scratch2, Operand(1)); |
| __ ConvertIntToDouble(scratch2, double_result); |
| __ ddbr(double_result, double_scratch); |
| |
| // Test whether result is zero. Bail out to check for subnormal result. |
| // Due to subnormals, x^-y == (1/x)^y does not hold in all cases. |
| __ lzdr(kDoubleRegZero); |
| __ cdbr(double_result, kDoubleRegZero); |
| __ bne(&done, Label::kNear); |
| // double_exponent may not containe the exponent value if the input was a |
| // smi. We set it with exponent value before bailing out. |
| __ ConvertIntToDouble(exponent, double_exponent); |
| |
| // Returning or bailing out. |
| if (exponent_type() == ON_STACK) { |
| // The arguments are still on the stack. |
| __ bind(&call_runtime); |
| __ TailCallRuntime(Runtime::kMathPowRT); |
| |
| // The stub is called from non-optimized code, which expects the result |
| // as heap number in exponent. |
| __ bind(&done); |
| __ AllocateHeapNumber(heapnumber, scratch, scratch2, heapnumbermap, |
| &call_runtime); |
| __ StoreDouble(double_result, |
| FieldMemOperand(heapnumber, HeapNumber::kValueOffset)); |
| DCHECK(heapnumber.is(r2)); |
| __ Ret(2); |
| } else { |
| __ push(r14); |
| { |
| AllowExternalCallThatCantCauseGC scope(masm); |
| __ PrepareCallCFunction(0, 2, scratch); |
| __ MovToFloatParameters(double_base, double_exponent); |
| __ CallCFunction( |
| ExternalReference::power_double_double_function(isolate()), 0, 2); |
| } |
| __ pop(r14); |
| __ MovFromFloatResult(double_result); |
| |
| __ bind(&done); |
| __ Ret(); |
| } |
| } |
| |
| bool CEntryStub::NeedsImmovableCode() { return true; } |
| |
| void CodeStub::GenerateStubsAheadOfTime(Isolate* isolate) { |
| CEntryStub::GenerateAheadOfTime(isolate); |
| StoreBufferOverflowStub::GenerateFixedRegStubsAheadOfTime(isolate); |
| StubFailureTrampolineStub::GenerateAheadOfTime(isolate); |
| CommonArrayConstructorStub::GenerateStubsAheadOfTime(isolate); |
| CreateAllocationSiteStub::GenerateAheadOfTime(isolate); |
| CreateWeakCellStub::GenerateAheadOfTime(isolate); |
| BinaryOpICStub::GenerateAheadOfTime(isolate); |
| StoreRegistersStateStub::GenerateAheadOfTime(isolate); |
| RestoreRegistersStateStub::GenerateAheadOfTime(isolate); |
| BinaryOpICWithAllocationSiteStub::GenerateAheadOfTime(isolate); |
| StoreFastElementStub::GenerateAheadOfTime(isolate); |
| TypeofStub::GenerateAheadOfTime(isolate); |
| } |
| |
| void StoreRegistersStateStub::GenerateAheadOfTime(Isolate* isolate) { |
| StoreRegistersStateStub stub(isolate); |
| stub.GetCode(); |
| } |
| |
| void RestoreRegistersStateStub::GenerateAheadOfTime(Isolate* isolate) { |
| RestoreRegistersStateStub stub(isolate); |
| stub.GetCode(); |
| } |
| |
| void CodeStub::GenerateFPStubs(Isolate* isolate) { |
| SaveFPRegsMode mode = kSaveFPRegs; |
| CEntryStub(isolate, 1, mode).GetCode(); |
| StoreBufferOverflowStub(isolate, mode).GetCode(); |
| isolate->set_fp_stubs_generated(true); |
| } |
| |
| void CEntryStub::GenerateAheadOfTime(Isolate* isolate) { |
| CEntryStub stub(isolate, 1, kDontSaveFPRegs); |
| stub.GetCode(); |
| } |
| |
| void CEntryStub::Generate(MacroAssembler* masm) { |
| // Called from JavaScript; parameters are on stack as if calling JS function. |
| // r2: number of arguments including receiver |
| // r3: pointer to builtin function |
| // fp: frame pointer (restored after C call) |
| // sp: stack pointer (restored as callee's sp after C call) |
| // cp: current context (C callee-saved) |
| // |
| // If argv_in_register(): |
| // r4: pointer to the first argument |
| ProfileEntryHookStub::MaybeCallEntryHook(masm); |
| |
| __ LoadRR(r7, r3); |
| |
| if (argv_in_register()) { |
| // Move argv into the correct register. |
| __ LoadRR(r3, r4); |
| } else { |
| // Compute the argv pointer. |
| __ ShiftLeftP(r3, r2, Operand(kPointerSizeLog2)); |
| __ lay(r3, MemOperand(r3, sp, -kPointerSize)); |
| } |
| |
| // Enter the exit frame that transitions from JavaScript to C++. |
| FrameScope scope(masm, StackFrame::MANUAL); |
| |
| // Need at least one extra slot for return address location. |
| int arg_stack_space = 1; |
| |
| // Pass buffer for return value on stack if necessary |
| bool needs_return_buffer = |
| result_size() > 2 || |
| (result_size() == 2 && !ABI_RETURNS_OBJECTPAIR_IN_REGS); |
| if (needs_return_buffer) { |
| arg_stack_space += result_size(); |
| } |
| |
| #if V8_TARGET_ARCH_S390X |
| // 64-bit linux pass Argument object by reference not value |
| arg_stack_space += 2; |
| #endif |
| |
| __ EnterExitFrame(save_doubles(), arg_stack_space); |
| |
| // Store a copy of argc, argv in callee-saved registers for later. |
| __ LoadRR(r6, r2); |
| __ LoadRR(r8, r3); |
| // r2, r6: number of arguments including receiver (C callee-saved) |
| // r3, r8: pointer to the first argument |
| // r7: pointer to builtin function (C callee-saved) |
| |
| // Result returned in registers or stack, depending on result size and ABI. |
| |
| Register isolate_reg = r4; |
| if (needs_return_buffer) { |
| // The return value is 16-byte non-scalar value. |
| // Use frame storage reserved by calling function to pass return |
| // buffer as implicit first argument in R2. Shfit original parameters |
| // by one register each. |
| __ LoadRR(r4, r3); |
| __ LoadRR(r3, r2); |
| __ la(r2, MemOperand(sp, (kStackFrameExtraParamSlot + 1) * kPointerSize)); |
| isolate_reg = r5; |
| } |
| // Call C built-in. |
| __ mov(isolate_reg, Operand(ExternalReference::isolate_address(isolate()))); |
| |
| Register target = r7; |
| |
| // To let the GC traverse the return address of the exit frames, we need to |
| // know where the return address is. The CEntryStub is unmovable, so |
| // we can store the address on the stack to be able to find it again and |
| // we never have to restore it, because it will not change. |
| { |
| Label return_label; |
| __ larl(r14, &return_label); // Generate the return addr of call later. |
| __ StoreP(r14, MemOperand(sp, kStackFrameRASlot * kPointerSize)); |
| |
| // zLinux ABI requires caller's frame to have sufficient space for callee |
| // preserved regsiter save area. |
| // __ lay(sp, MemOperand(sp, -kCalleeRegisterSaveAreaSize)); |
| __ b(target); |
| __ bind(&return_label); |
| // __ la(sp, MemOperand(sp, +kCalleeRegisterSaveAreaSize)); |
| } |
| |
| // If return value is on the stack, pop it to registers. |
| if (needs_return_buffer) { |
| if (result_size() > 2) __ LoadP(r4, MemOperand(r2, 2 * kPointerSize)); |
| __ LoadP(r3, MemOperand(r2, kPointerSize)); |
| __ LoadP(r2, MemOperand(r2)); |
| } |
| |
| // Check result for exception sentinel. |
| Label exception_returned; |
| __ CompareRoot(r2, Heap::kExceptionRootIndex); |
| __ beq(&exception_returned, Label::kNear); |
| |
| // Check that there is no pending exception, otherwise we |
| // should have returned the exception sentinel. |
| if (FLAG_debug_code) { |
| Label okay; |
| ExternalReference pending_exception_address( |
| Isolate::kPendingExceptionAddress, isolate()); |
| __ mov(r1, Operand(pending_exception_address)); |
| __ LoadP(r1, MemOperand(r1)); |
| __ CompareRoot(r1, Heap::kTheHoleValueRootIndex); |
| // Cannot use check here as it attempts to generate call into runtime. |
| __ beq(&okay, Label::kNear); |
| __ stop("Unexpected pending exception"); |
| __ bind(&okay); |
| } |
| |
| // Exit C frame and return. |
| // r2:r3: result |
| // sp: stack pointer |
| // fp: frame pointer |
| Register argc; |
| if (argv_in_register()) { |
| // We don't want to pop arguments so set argc to no_reg. |
| argc = no_reg; |
| } else { |
| // r6: still holds argc (callee-saved). |
| argc = r6; |
| } |
| __ LeaveExitFrame(save_doubles(), argc, true); |
| __ b(r14); |
| |
| // Handling of exception. |
| __ bind(&exception_returned); |
| |
| ExternalReference pending_handler_context_address( |
| Isolate::kPendingHandlerContextAddress, isolate()); |
| ExternalReference pending_handler_code_address( |
| Isolate::kPendingHandlerCodeAddress, isolate()); |
| ExternalReference pending_handler_offset_address( |
| Isolate::kPendingHandlerOffsetAddress, isolate()); |
| ExternalReference pending_handler_fp_address( |
| Isolate::kPendingHandlerFPAddress, isolate()); |
| ExternalReference pending_handler_sp_address( |
| Isolate::kPendingHandlerSPAddress, isolate()); |
| |
| // Ask the runtime for help to determine the handler. This will set r3 to |
| // contain the current pending exception, don't clobber it. |
| ExternalReference find_handler(Runtime::kUnwindAndFindExceptionHandler, |
| isolate()); |
| { |
| FrameScope scope(masm, StackFrame::MANUAL); |
| __ PrepareCallCFunction(3, 0, r2); |
| __ LoadImmP(r2, Operand::Zero()); |
| __ LoadImmP(r3, Operand::Zero()); |
| __ mov(r4, Operand(ExternalReference::isolate_address(isolate()))); |
| __ CallCFunction(find_handler, 3); |
| } |
| |
| // Retrieve the handler context, SP and FP. |
| __ mov(cp, Operand(pending_handler_context_address)); |
| __ LoadP(cp, MemOperand(cp)); |
| __ mov(sp, Operand(pending_handler_sp_address)); |
| __ LoadP(sp, MemOperand(sp)); |
| __ mov(fp, Operand(pending_handler_fp_address)); |
| __ LoadP(fp, MemOperand(fp)); |
| |
| // If the handler is a JS frame, restore the context to the frame. Note that |
| // the context will be set to (cp == 0) for non-JS frames. |
| Label skip; |
| __ CmpP(cp, Operand::Zero()); |
| __ beq(&skip, Label::kNear); |
| __ StoreP(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); |
| __ bind(&skip); |
| |
| // Compute the handler entry address and jump to it. |
| __ mov(r3, Operand(pending_handler_code_address)); |
| __ LoadP(r3, MemOperand(r3)); |
| __ mov(r4, Operand(pending_handler_offset_address)); |
| __ LoadP(r4, MemOperand(r4)); |
| __ AddP(r3, r3, Operand(Code::kHeaderSize - kHeapObjectTag)); // Code start |
| __ AddP(ip, r3, r4); |
| __ Jump(ip); |
| } |
| |
| void JSEntryStub::Generate(MacroAssembler* masm) { |
| // r2: code entry |
| // r3: function |
| // r4: receiver |
| // r5: argc |
| // r6: argv |
| |
| Label invoke, handler_entry, exit; |
| |
| ProfileEntryHookStub::MaybeCallEntryHook(masm); |
| |
| // saving floating point registers |
| #if V8_TARGET_ARCH_S390X |
| // 64bit ABI requires f8 to f15 be saved |
| __ lay(sp, MemOperand(sp, -8 * kDoubleSize)); |
| __ std(d8, MemOperand(sp)); |
| __ std(d9, MemOperand(sp, 1 * kDoubleSize)); |
| __ std(d10, MemOperand(sp, 2 * kDoubleSize)); |
| __ std(d11, MemOperand(sp, 3 * kDoubleSize)); |
| __ std(d12, MemOperand(sp, 4 * kDoubleSize)); |
| __ std(d13, MemOperand(sp, 5 * kDoubleSize)); |
| __ std(d14, MemOperand(sp, 6 * kDoubleSize)); |
| __ std(d15, MemOperand(sp, 7 * kDoubleSize)); |
| #else |
| // 31bit ABI requires you to store f4 and f6: |
| // http://refspecs.linuxbase.org/ELF/zSeries/lzsabi0_s390.html#AEN417 |
| __ lay(sp, MemOperand(sp, -2 * kDoubleSize)); |
| __ std(d4, MemOperand(sp)); |
| __ std(d6, MemOperand(sp, kDoubleSize)); |
| #endif |
| |
| // zLinux ABI |
| // Incoming parameters: |
| // r2: code entry |
| // r3: function |
| // r4: receiver |
| // r5: argc |
| // r6: argv |
| // Requires us to save the callee-preserved registers r6-r13 |
| // General convention is to also save r14 (return addr) and |
| // sp/r15 as well in a single STM/STMG |
| __ lay(sp, MemOperand(sp, -10 * kPointerSize)); |
| __ StoreMultipleP(r6, sp, MemOperand(sp, 0)); |
| |
| // Set up the reserved register for 0.0. |
| // __ LoadDoubleLiteral(kDoubleRegZero, 0.0, r0); |
| |
| // Push a frame with special values setup to mark it as an entry frame. |
| // Bad FP (-1) |
| // SMI Marker |
| // SMI Marker |
| // kCEntryFPAddress |
| // Frame type |
| __ lay(sp, MemOperand(sp, -5 * kPointerSize)); |
| // Push a bad frame pointer to fail if it is used. |
| __ LoadImmP(r10, Operand(-1)); |
| |
| int marker = type(); |
| __ LoadSmiLiteral(r9, Smi::FromInt(marker)); |
| __ LoadSmiLiteral(r8, Smi::FromInt(marker)); |
| // Save copies of the top frame descriptor on the stack. |
| __ mov(r7, Operand(ExternalReference(Isolate::kCEntryFPAddress, isolate()))); |
| __ LoadP(r7, MemOperand(r7)); |
| __ StoreMultipleP(r7, r10, MemOperand(sp, kPointerSize)); |
| // Set up frame pointer for the frame to be pushed. |
| // Need to add kPointerSize, because sp has one extra |
| // frame already for the frame type being pushed later. |
| __ lay(fp, |
| MemOperand(sp, -EntryFrameConstants::kCallerFPOffset + kPointerSize)); |
| |
| // If this is the outermost JS call, set js_entry_sp value. |
| Label non_outermost_js; |
| ExternalReference js_entry_sp(Isolate::kJSEntrySPAddress, isolate()); |
| __ mov(r7, Operand(ExternalReference(js_entry_sp))); |
| __ LoadAndTestP(r8, MemOperand(r7)); |
| __ bne(&non_outermost_js, Label::kNear); |
| __ StoreP(fp, MemOperand(r7)); |
| __ LoadSmiLiteral(ip, Smi::FromInt(StackFrame::OUTERMOST_JSENTRY_FRAME)); |
| Label cont; |
| __ b(&cont, Label::kNear); |
| __ bind(&non_outermost_js); |
| __ LoadSmiLiteral(ip, Smi::FromInt(StackFrame::INNER_JSENTRY_FRAME)); |
| |
| __ bind(&cont); |
| __ StoreP(ip, MemOperand(sp)); // frame-type |
| |
| // Jump to a faked try block that does the invoke, with a faked catch |
| // block that sets the pending exception. |
| __ b(&invoke, Label::kNear); |
| |
| __ bind(&handler_entry); |
| handler_offset_ = handler_entry.pos(); |
| // Caught exception: Store result (exception) in the pending exception |
| // field in the JSEnv and return a failure sentinel. Coming in here the |
| // fp will be invalid because the PushStackHandler below sets it to 0 to |
| // signal the existence of the JSEntry frame. |
| __ mov(ip, Operand(ExternalReference(Isolate::kPendingExceptionAddress, |
| isolate()))); |
| |
| __ StoreP(r2, MemOperand(ip)); |
| __ LoadRoot(r2, Heap::kExceptionRootIndex); |
| __ b(&exit, Label::kNear); |
| |
| // Invoke: Link this frame into the handler chain. |
| __ bind(&invoke); |
| // Must preserve r2-r6. |
| __ PushStackHandler(); |
| // If an exception not caught by another handler occurs, this handler |
| // returns control to the code after the b(&invoke) above, which |
| // restores all kCalleeSaved registers (including cp and fp) to their |
| // saved values before returning a failure to C. |
| |
| // Clear any pending exceptions. |
| __ mov(ip, Operand(ExternalReference(Isolate::kPendingExceptionAddress, |
| isolate()))); |
| __ mov(r7, Operand(isolate()->factory()->the_hole_value())); |
| __ StoreP(r7, MemOperand(ip)); |
| |
| // Invoke the function by calling through JS entry trampoline builtin. |
| // Notice that we cannot store a reference to the trampoline code directly in |
| // this stub, because runtime stubs are not traversed when doing GC. |
| |
| // Expected registers by Builtins::JSEntryTrampoline |
| // r2: code entry |
| // r3: function |
| // r4: receiver |
| // r5: argc |
| // r6: argv |
| if (type() == StackFrame::ENTRY_CONSTRUCT) { |
| ExternalReference construct_entry(Builtins::kJSConstructEntryTrampoline, |
| isolate()); |
| __ mov(ip, Operand(construct_entry)); |
| } else { |
| ExternalReference entry(Builtins::kJSEntryTrampoline, isolate()); |
| __ mov(ip, Operand(entry)); |
| } |
| __ LoadP(ip, MemOperand(ip)); // deref address |
| |
| // Branch and link to JSEntryTrampoline. |
| // the address points to the start of the code object, skip the header |
| __ AddP(ip, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| Label return_addr; |
| // __ basr(r14, ip); |
| __ larl(r14, &return_addr); |
| __ b(ip); |
| __ bind(&return_addr); |
| |
| // Unlink this frame from the handler chain. |
| __ PopStackHandler(); |
| |
| __ bind(&exit); // r2 holds result |
| // Check if the current stack frame is marked as the outermost JS frame. |
| Label non_outermost_js_2; |
| __ pop(r7); |
| __ CmpSmiLiteral(r7, Smi::FromInt(StackFrame::OUTERMOST_JSENTRY_FRAME), r0); |
| __ bne(&non_outermost_js_2, Label::kNear); |
| __ mov(r8, Operand::Zero()); |
| __ mov(r7, Operand(ExternalReference(js_entry_sp))); |
| __ StoreP(r8, MemOperand(r7)); |
| __ bind(&non_outermost_js_2); |
| |
| // Restore the top frame descriptors from the stack. |
| __ pop(r5); |
| __ mov(ip, Operand(ExternalReference(Isolate::kCEntryFPAddress, isolate()))); |
| __ StoreP(r5, MemOperand(ip)); |
| |
| // Reset the stack to the callee saved registers. |
| __ lay(sp, MemOperand(sp, -EntryFrameConstants::kCallerFPOffset)); |
| |
| // Reload callee-saved preserved regs, return address reg (r14) and sp |
| __ LoadMultipleP(r6, sp, MemOperand(sp, 0)); |
| __ la(sp, MemOperand(sp, 10 * kPointerSize)); |
| |
| // saving floating point registers |
| #if V8_TARGET_ARCH_S390X |
| // 64bit ABI requires f8 to f15 be saved |
| __ ld(d8, MemOperand(sp)); |
| __ ld(d9, MemOperand(sp, 1 * kDoubleSize)); |
| __ ld(d10, MemOperand(sp, 2 * kDoubleSize)); |
| __ ld(d11, MemOperand(sp, 3 * kDoubleSize)); |
| __ ld(d12, MemOperand(sp, 4 * kDoubleSize)); |
| __ ld(d13, MemOperand(sp, 5 * kDoubleSize)); |
| __ ld(d14, MemOperand(sp, 6 * kDoubleSize)); |
| __ ld(d15, MemOperand(sp, 7 * kDoubleSize)); |
| __ la(sp, MemOperand(sp, 8 * kDoubleSize)); |
| #else |
| // 31bit ABI requires you to store f4 and f6: |
| // http://refspecs.linuxbase.org/ELF/zSeries/lzsabi0_s390.html#AEN417 |
| __ ld(d4, MemOperand(sp)); |
| __ ld(d6, MemOperand(sp, kDoubleSize)); |
| __ la(sp, MemOperand(sp, 2 * kDoubleSize)); |
| #endif |
| |
| __ b(r14); |
| } |
| |
| void FunctionPrototypeStub::Generate(MacroAssembler* masm) { |
| Label miss; |
| Register receiver = LoadDescriptor::ReceiverRegister(); |
| // Ensure that the vector and slot registers won't be clobbered before |
| // calling the miss handler. |
| DCHECK(!AreAliased(r6, r7, LoadWithVectorDescriptor::VectorRegister(), |
| LoadWithVectorDescriptor::SlotRegister())); |
| |
| NamedLoadHandlerCompiler::GenerateLoadFunctionPrototype(masm, receiver, r6, |
| r7, &miss); |
| __ bind(&miss); |
| PropertyAccessCompiler::TailCallBuiltin( |
| masm, PropertyAccessCompiler::MissBuiltin(Code::LOAD_IC)); |
| } |
| |
| void LoadIndexedStringStub::Generate(MacroAssembler* masm) { |
| // Return address is in lr. |
| Label miss; |
| |
| Register receiver = LoadDescriptor::ReceiverRegister(); |
| Register index = LoadDescriptor::NameRegister(); |
| Register scratch = r7; |
| Register result = r2; |
| DCHECK(!scratch.is(receiver) && !scratch.is(index)); |
| DCHECK(!scratch.is(LoadWithVectorDescriptor::VectorRegister()) && |
| result.is(LoadWithVectorDescriptor::SlotRegister())); |
| |
| // StringCharAtGenerator doesn't use the result register until it's passed |
| // the different miss possibilities. If it did, we would have a conflict |
| // when FLAG_vector_ics is true. |
| StringCharAtGenerator char_at_generator(receiver, index, scratch, result, |
| &miss, // When not a string. |
| &miss, // When not a number. |
| &miss, // When index out of range. |
| RECEIVER_IS_STRING); |
| char_at_generator.GenerateFast(masm); |
| __ Ret(); |
| |
| StubRuntimeCallHelper call_helper; |
| char_at_generator.GenerateSlow(masm, PART_OF_IC_HANDLER, call_helper); |
| |
| __ bind(&miss); |
| PropertyAccessCompiler::TailCallBuiltin( |
| masm, PropertyAccessCompiler::MissBuiltin(Code::KEYED_LOAD_IC)); |
| } |
| |
| void RegExpExecStub::Generate(MacroAssembler* masm) { |
| // Just jump directly to runtime if native RegExp is not selected at compile |
| // time or if regexp entry in generated code is turned off runtime switch or |
| // at compilation. |
| #ifdef V8_INTERPRETED_REGEXP |
| __ TailCallRuntime(Runtime::kRegExpExec); |
| #else // V8_INTERPRETED_REGEXP |
| |
| // Stack frame on entry. |
| // sp[0]: last_match_info (expected JSArray) |
| // sp[4]: previous index |
| // sp[8]: subject string |
| // sp[12]: JSRegExp object |
| |
| const int kLastMatchInfoOffset = 0 * kPointerSize; |
| const int kPreviousIndexOffset = 1 * kPointerSize; |
| const int kSubjectOffset = 2 * kPointerSize; |
| const int kJSRegExpOffset = 3 * kPointerSize; |
| |
| Label runtime, br_over, encoding_type_UC16; |
| |
| // Allocation of registers for this function. These are in callee save |
| // registers and will be preserved by the call to the native RegExp code, as |
| // this code is called using the normal C calling convention. When calling |
| // directly from generated code the native RegExp code will not do a GC and |
| // therefore the content of these registers are safe to use after the call. |
| Register subject = r6; |
| Register regexp_data = r7; |
| Register last_match_info_elements = r8; |
| Register code = r9; |
| |
| __ CleanseP(r14); |
| |
| // Ensure register assigments are consistent with callee save masks |
| DCHECK(subject.bit() & kCalleeSaved); |
| DCHECK(regexp_data.bit() & kCalleeSaved); |
| DCHECK(last_match_info_elements.bit() & kCalleeSaved); |
| DCHECK(code.bit() & kCalleeSaved); |
| |
| // Ensure that a RegExp stack is allocated. |
| ExternalReference address_of_regexp_stack_memory_address = |
| ExternalReference::address_of_regexp_stack_memory_address(isolate()); |
| ExternalReference address_of_regexp_stack_memory_size = |
| ExternalReference::address_of_regexp_stack_memory_size(isolate()); |
| __ mov(r2, Operand(address_of_regexp_stack_memory_size)); |
| __ LoadAndTestP(r2, MemOperand(r2)); |
| __ beq(&runtime); |
| |
| // Check that the first argument is a JSRegExp object. |
| __ LoadP(r2, MemOperand(sp, kJSRegExpOffset)); |
| __ JumpIfSmi(r2, &runtime); |
| __ CompareObjectType(r2, r3, r3, JS_REGEXP_TYPE); |
| __ bne(&runtime); |
| |
| // Check that the RegExp has been compiled (data contains a fixed array). |
| __ LoadP(regexp_data, FieldMemOperand(r2, JSRegExp::kDataOffset)); |
| if (FLAG_debug_code) { |
| __ TestIfSmi(regexp_data); |
| __ Check(ne, kUnexpectedTypeForRegExpDataFixedArrayExpected, cr0); |
| __ CompareObjectType(regexp_data, r2, r2, FIXED_ARRAY_TYPE); |
| __ Check(eq, kUnexpectedTypeForRegExpDataFixedArrayExpected); |
| } |
| |
| // regexp_data: RegExp data (FixedArray) |
| // Check the type of the RegExp. Only continue if type is JSRegExp::IRREGEXP. |
| __ LoadP(r2, FieldMemOperand(regexp_data, JSRegExp::kDataTagOffset)); |
| // DCHECK(Smi::FromInt(JSRegExp::IRREGEXP) < (char *)0xffffu); |
| __ CmpSmiLiteral(r2, Smi::FromInt(JSRegExp::IRREGEXP), r0); |
| __ bne(&runtime); |
| |
| // regexp_data: RegExp data (FixedArray) |
| // Check that the number of captures fit in the static offsets vector buffer. |
| __ LoadP(r4, |
| FieldMemOperand(regexp_data, JSRegExp::kIrregexpCaptureCountOffset)); |
| // Check (number_of_captures + 1) * 2 <= offsets vector size |
| // Or number_of_captures * 2 <= offsets vector size - 2 |
| // SmiToShortArrayOffset accomplishes the multiplication by 2 and |
| // SmiUntag (which is a nop for 32-bit). |
| __ SmiToShortArrayOffset(r4, r4); |
| STATIC_ASSERT(Isolate::kJSRegexpStaticOffsetsVectorSize >= 2); |
| __ CmpLogicalP(r4, Operand(Isolate::kJSRegexpStaticOffsetsVectorSize - 2)); |
| __ bgt(&runtime); |
| |
| // Reset offset for possibly sliced string. |
| __ LoadImmP(ip, Operand::Zero()); |
| __ LoadP(subject, MemOperand(sp, kSubjectOffset)); |
| __ JumpIfSmi(subject, &runtime); |
| __ LoadRR(r5, subject); // Make a copy of the original subject string. |
| // subject: subject string |
| // r5: subject string |
| // regexp_data: RegExp data (FixedArray) |
| // Handle subject string according to its encoding and representation: |
| // (1) Sequential string? If yes, go to (4). |
| // (2) Sequential or cons? If not, go to (5). |
| // (3) Cons string. If the string is flat, replace subject with first string |
| // and go to (1). Otherwise bail out to runtime. |
| // (4) Sequential string. Load regexp code according to encoding. |
| // (E) Carry on. |
| /// [...] |
| |
| // Deferred code at the end of the stub: |
| // (5) Long external string? If not, go to (7). |
| // (6) External string. Make it, offset-wise, look like a sequential string. |
| // Go to (4). |
| // (7) Short external string or not a string? If yes, bail out to runtime. |
| // (8) Sliced string. Replace subject with parent. Go to (1). |
| |
| Label seq_string /* 4 */, external_string /* 6 */, check_underlying /* 1 */, |
| not_seq_nor_cons /* 5 */, not_long_external /* 7 */; |
| |
| __ bind(&check_underlying); |
| __ LoadP(r2, FieldMemOperand(subject, HeapObject::kMapOffset)); |
| __ LoadlB(r2, FieldMemOperand(r2, Map::kInstanceTypeOffset)); |
| |
| // (1) Sequential string? If yes, go to (4). |
| |
| STATIC_ASSERT((kIsNotStringMask | kStringRepresentationMask | |
| kShortExternalStringMask) == 0x93); |
| __ mov(r3, Operand(kIsNotStringMask | kStringRepresentationMask | |
| kShortExternalStringMask)); |
| __ AndP(r3, r2); |
| STATIC_ASSERT((kStringTag | kSeqStringTag) == 0); |
| __ beq(&seq_string, Label::kNear); // Go to (4). |
| |
| // (2) Sequential or cons? If not, go to (5). |
| STATIC_ASSERT(kConsStringTag < kExternalStringTag); |
| STATIC_ASSERT(kSlicedStringTag > kExternalStringTag); |
| STATIC_ASSERT(kIsNotStringMask > kExternalStringTag); |
| STATIC_ASSERT(kShortExternalStringTag > kExternalStringTag); |
| STATIC_ASSERT(kExternalStringTag < 0xffffu); |
| __ CmpP(r3, Operand(kExternalStringTag)); |
| __ bge(¬_seq_nor_cons); // Go to (5). |
| |
| // (3) Cons string. Check that it's flat. |
| // Replace subject with first string and reload instance type. |
| __ LoadP(r2, FieldMemOperand(subject, ConsString::kSecondOffset)); |
| __ CompareRoot(r2, Heap::kempty_stringRootIndex); |
| __ bne(&runtime); |
| __ LoadP(subject, FieldMemOperand(subject, ConsString::kFirstOffset)); |
| __ b(&check_underlying); |
| |
| // (4) Sequential string. Load regexp code according to encoding. |
| __ bind(&seq_string); |
| // subject: sequential subject string (or look-alike, external string) |
| // r5: original subject string |
| // Load previous index and check range before r5 is overwritten. We have to |
| // use r5 instead of subject here because subject might have been only made |
| // to look like a sequential string when it actually is an external string. |
| __ LoadP(r3, MemOperand(sp, kPreviousIndexOffset)); |
| __ JumpIfNotSmi(r3, &runtime); |
| __ LoadP(r5, FieldMemOperand(r5, String::kLengthOffset)); |
| __ CmpLogicalP(r5, r3); |
| __ ble(&runtime); |
| __ SmiUntag(r3); |
| |
| STATIC_ASSERT(4 == kOneByteStringTag); |
| STATIC_ASSERT(kTwoByteStringTag == 0); |
| STATIC_ASSERT(kStringEncodingMask == 4); |
| __ ExtractBitMask(r5, r2, kStringEncodingMask, SetRC); |
| __ beq(&encoding_type_UC16, Label::kNear); |
| __ LoadP(code, |
| FieldMemOperand(regexp_data, JSRegExp::kDataOneByteCodeOffset)); |
| __ b(&br_over, Label::kNear); |
| __ bind(&encoding_type_UC16); |
| __ LoadP(code, FieldMemOperand(regexp_data, JSRegExp::kDataUC16CodeOffset)); |
| __ bind(&br_over); |
| |
| // (E) Carry on. String handling is done. |
| // code: irregexp code |
| // Check that the irregexp code has been generated for the actual string |
| // encoding. If it has, the field contains a code object otherwise it contains |
| // a smi (code flushing support). |
| __ JumpIfSmi(code, &runtime); |
| |
| // r3: previous index |
| // r5: encoding of subject string (1 if one_byte, 0 if two_byte); |
| // code: Address of generated regexp code |
| // subject: Subject string |
| // regexp_data: RegExp data (FixedArray) |
| // All checks done. Now push arguments for native regexp code. |
| __ IncrementCounter(isolate()->counters()->regexp_entry_native(), 1, r2, r4); |
| |
| // Isolates: note we add an additional parameter here (isolate pointer). |
| const int kRegExpExecuteArguments = 10; |
| const int kParameterRegisters = 5; |
| __ EnterExitFrame(false, kRegExpExecuteArguments - kParameterRegisters); |
| |
| // Stack pointer now points to cell where return address is to be written. |
| // Arguments are before that on the stack or in registers. |
| |
| // Argument 10 (in stack parameter area): Pass current isolate address. |
| __ mov(r2, Operand(ExternalReference::isolate_address(isolate()))); |
| __ StoreP(r2, MemOperand(sp, kStackFrameExtraParamSlot * kPointerSize + |
| 4 * kPointerSize)); |
| |
| // Argument 9 is a dummy that reserves the space used for |
| // the return address added by the ExitFrame in native calls. |
| __ mov(r2, Operand::Zero()); |
| __ StoreP(r2, MemOperand(sp, kStackFrameExtraParamSlot * kPointerSize + |
| 3 * kPointerSize)); |
| |
| // Argument 8: Indicate that this is a direct call from JavaScript. |
| __ mov(r2, Operand(1)); |
| __ StoreP(r2, MemOperand(sp, kStackFrameExtraParamSlot * kPointerSize + |
| 2 * kPointerSize)); |
| |
| // Argument 7: Start (high end) of backtracking stack memory area. |
| __ mov(r2, Operand(address_of_regexp_stack_memory_address)); |
| __ LoadP(r2, MemOperand(r2, 0)); |
| __ mov(r1, Operand(address_of_regexp_stack_memory_size)); |
| __ LoadP(r1, MemOperand(r1, 0)); |
| __ AddP(r2, r1); |
| __ StoreP(r2, MemOperand(sp, kStackFrameExtraParamSlot * kPointerSize + |
| 1 * kPointerSize)); |
| |
| // Argument 6: Set the number of capture registers to zero to force |
| // global egexps to behave as non-global. This does not affect non-global |
| // regexps. |
| __ mov(r2, Operand::Zero()); |
| __ StoreP(r2, MemOperand(sp, kStackFrameExtraParamSlot * kPointerSize + |
| 0 * kPointerSize)); |
| |
| // Argument 1 (r2): Subject string. |
| // Load the length from the original subject string from the previous stack |
| // frame. Therefore we have to use fp, which points exactly to 15 pointer |
| // sizes below the previous sp. (Because creating a new stack frame pushes |
| // the previous fp onto the stack and moves up sp by 2 * kPointerSize and |
| // 13 registers saved on the stack previously) |
| __ LoadP(r2, MemOperand(fp, kSubjectOffset + 2 * kPointerSize)); |
| |
| // Argument 2 (r3): Previous index. |
| // Already there |
| __ AddP(r1, subject, Operand(SeqString::kHeaderSize - kHeapObjectTag)); |
| |
| // Argument 5 (r6): static offsets vector buffer. |
| __ mov( |
| r6, |
| Operand(ExternalReference::address_of_static_offsets_vector(isolate()))); |
| |
| // For arguments 4 (r5) and 3 (r4) get string length, calculate start of data |
| // and calculate the shift of the index (0 for one-byte and 1 for two byte). |
| __ XorP(r5, Operand(1)); |
| // If slice offset is not 0, load the length from the original sliced string. |
| // Argument 3, r4: Start of string data |
| // Prepare start and end index of the input. |
| __ ShiftLeftP(ip, ip, r5); |
| __ AddP(ip, r1, ip); |
| __ ShiftLeftP(r4, r3, r5); |
| __ AddP(r4, ip, r4); |
| |
| // Argument 4, r5: End of string data |
| __ LoadP(r1, FieldMemOperand(r2, String::kLengthOffset)); |
| __ SmiUntag(r1); |
| __ ShiftLeftP(r0, r1, r5); |
| __ AddP(r5, ip, r0); |
| |
| // Locate the code entry and call it. |
| __ AddP(code, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| |
| DirectCEntryStub stub(isolate()); |
| stub.GenerateCall(masm, code); |
| |
| __ LeaveExitFrame(false, no_reg, true); |
| |
| // r2: result (int32) |
| // subject: subject string -- needed to reload |
| __ LoadP(subject, MemOperand(sp, kSubjectOffset)); |
| |
| // regexp_data: RegExp data (callee saved) |
| // last_match_info_elements: Last match info elements (callee saved) |
| // Check the result. |
| Label success; |
| __ Cmp32(r2, Operand(1)); |
| // We expect exactly one result since we force the called regexp to behave |
| // as non-global. |
| __ beq(&success); |
| Label failure; |
| __ Cmp32(r2, Operand(NativeRegExpMacroAssembler::FAILURE)); |
| __ beq(&failure); |
| __ Cmp32(r2, Operand(NativeRegExpMacroAssembler::EXCEPTION)); |
| // If not exception it can only be retry. Handle that in the runtime system. |
| __ bne(&runtime); |
| // Result must now be exception. If there is no pending exception already a |
| // stack overflow (on the backtrack stack) was detected in RegExp code but |
| // haven't created the exception yet. Handle that in the runtime system. |
| // TODO(592): Rerunning the RegExp to get the stack overflow exception. |
| __ mov(r3, Operand(isolate()->factory()->the_hole_value())); |
| __ mov(r4, Operand(ExternalReference(Isolate::kPendingExceptionAddress, |
| isolate()))); |
| __ LoadP(r2, MemOperand(r4, 0)); |
| __ CmpP(r2, r3); |
| __ beq(&runtime); |
| |
| // For exception, throw the exception again. |
| __ TailCallRuntime(Runtime::kRegExpExecReThrow); |
| |
| __ bind(&failure); |
| // For failure and exception return null. |
| __ mov(r2, Operand(isolate()->factory()->null_value())); |
| __ la(sp, MemOperand(sp, (4 * kPointerSize))); |
| __ Ret(); |
| |
| // Process the result from the native regexp code. |
| __ bind(&success); |
| __ LoadP(r3, |
| FieldMemOperand(regexp_data, JSRegExp::kIrregexpCaptureCountOffset)); |
| // Calculate number of capture registers (number_of_captures + 1) * 2. |
| // SmiToShortArrayOffset accomplishes the multiplication by 2 and |
| // SmiUntag (which is a nop for 32-bit). |
| __ SmiToShortArrayOffset(r3, r3); |
| __ AddP(r3, Operand(2)); |
| |
| __ LoadP(r2, MemOperand(sp, kLastMatchInfoOffset)); |
| __ JumpIfSmi(r2, &runtime); |
| __ CompareObjectType(r2, r4, r4, JS_ARRAY_TYPE); |
| __ bne(&runtime); |
| // Check that the JSArray is in fast case. |
| __ LoadP(last_match_info_elements, |
| FieldMemOperand(r2, JSArray::kElementsOffset)); |
| __ LoadP(r2, |
| FieldMemOperand(last_match_info_elements, HeapObject::kMapOffset)); |
| __ CompareRoot(r2, Heap::kFixedArrayMapRootIndex); |
| __ bne(&runtime); |
| // Check that the last match info has space for the capture registers and the |
| // additional information. |
| __ LoadP( |
| r2, FieldMemOperand(last_match_info_elements, FixedArray::kLengthOffset)); |
| __ AddP(r4, r3, Operand(RegExpImpl::kLastMatchOverhead)); |
| __ SmiUntag(r0, r2); |
| __ CmpP(r4, r0); |
| __ bgt(&runtime); |
| |
| // r3: number of capture registers |
| // subject: subject string |
| // Store the capture count. |
| __ SmiTag(r4, r3); |
| __ StoreP(r4, FieldMemOperand(last_match_info_elements, |
| RegExpImpl::kLastCaptureCountOffset)); |
| // Store last subject and last input. |
| __ StoreP(subject, FieldMemOperand(last_match_info_elements, |
| RegExpImpl::kLastSubjectOffset)); |
| __ LoadRR(r4, subject); |
| __ RecordWriteField(last_match_info_elements, RegExpImpl::kLastSubjectOffset, |
| subject, r9, kLRHasNotBeenSaved, kDontSaveFPRegs); |
| __ LoadRR(subject, r4); |
| __ StoreP(subject, FieldMemOperand(last_match_info_elements, |
| RegExpImpl::kLastInputOffset)); |
| __ RecordWriteField(last_match_info_elements, RegExpImpl::kLastInputOffset, |
| subject, r9, kLRHasNotBeenSaved, kDontSaveFPRegs); |
| |
| // Get the static offsets vector filled by the native regexp code. |
| ExternalReference address_of_static_offsets_vector = |
| ExternalReference::address_of_static_offsets_vector(isolate()); |
| __ mov(r4, Operand(address_of_static_offsets_vector)); |
| |
| // r3: number of capture registers |
| // r4: offsets vector |
| Label next_capture; |
| // Capture register counter starts from number of capture registers and |
| // counts down until wraping after zero. |
| __ AddP( |
| r2, last_match_info_elements, |
| Operand(RegExpImpl::kFirstCaptureOffset - kHeapObjectTag - kPointerSize)); |
| __ AddP(r4, Operand(-kIntSize)); // bias down for lwzu |
| __ bind(&next_capture); |
| // Read the value from the static offsets vector buffer. |
| __ ly(r5, MemOperand(r4, kIntSize)); |
| __ lay(r4, MemOperand(r4, kIntSize)); |
| // Store the smi value in the last match info. |
| __ SmiTag(r5); |
| __ StoreP(r5, MemOperand(r2, kPointerSize)); |
| __ lay(r2, MemOperand(r2, kPointerSize)); |
| __ BranchOnCount(r3, &next_capture); |
| |
| // Return last match info. |
| __ LoadP(r2, MemOperand(sp, kLastMatchInfoOffset)); |
| __ la(sp, MemOperand(sp, (4 * kPointerSize))); |
| __ Ret(); |
| |
| // Do the runtime call to execute the regexp. |
| __ bind(&runtime); |
| __ TailCallRuntime(Runtime::kRegExpExec); |
| |
| // Deferred code for string handling. |
| // (5) Long external string? If not, go to (7). |
| __ bind(¬_seq_nor_cons); |
| // Compare flags are still set. |
| __ bgt(¬_long_external, Label::kNear); // Go to (7). |
| |
| // (6) External string. Make it, offset-wise, look like a sequential string. |
| __ bind(&external_string); |
| __ LoadP(r2, FieldMemOperand(subject, HeapObject::kMapOffset)); |
| __ LoadlB(r2, FieldMemOperand(r2, Map::kInstanceTypeOffset)); |
| if (FLAG_debug_code) { |
| // Assert that we do not have a cons or slice (indirect strings) here. |
| // Sequential strings have already been ruled out. |
| STATIC_ASSERT(kIsIndirectStringMask == 1); |
| __ tmll(r2, Operand(kIsIndirectStringMask)); |
| __ Assert(eq, kExternalStringExpectedButNotFound, cr0); |
| } |
| __ LoadP(subject, |
| FieldMemOperand(subject, ExternalString::kResourceDataOffset)); |
| // Move the pointer so that offset-wise, it looks like a sequential string. |
| STATIC_ASSERT(SeqTwoByteString::kHeaderSize == SeqOneByteString::kHeaderSize); |
| __ SubP(subject, subject, |
| Operand(SeqTwoByteString::kHeaderSize - kHeapObjectTag)); |
| __ b(&seq_string); // Go to (4). |
| |
| // (7) Short external string or not a string? If yes, bail out to runtime. |
| __ bind(¬_long_external); |
| STATIC_ASSERT(kNotStringTag != 0 && kShortExternalStringTag != 0); |
| __ mov(r0, Operand(kIsNotStringMask | kShortExternalStringMask)); |
| __ AndP(r0, r3); |
| __ bne(&runtime); |
| |
| // (8) Sliced string. Replace subject with parent. Go to (4). |
| // Load offset into ip and replace subject string with parent. |
| __ LoadP(ip, FieldMemOperand(subject, SlicedString::kOffsetOffset)); |
| __ SmiUntag(ip); |
| __ LoadP(subject, FieldMemOperand(subject, SlicedString::kParentOffset)); |
| __ b(&check_underlying); // Go to (4). |
| #endif // V8_INTERPRETED_REGEXP |
| } |
| |
| static void CallStubInRecordCallTarget(MacroAssembler* masm, CodeStub* stub) { |
| // r2 : number of arguments to the construct function |
| // r3 : the function to call |
| // r4 : feedback vector |
| // r5 : slot in feedback vector (Smi) |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| |
| // Number-of-arguments register must be smi-tagged to call out. |
| __ SmiTag(r2); |
| __ Push(r5, r4, r3, r2); |
| |
| __ CallStub(stub); |
| |
| __ Pop(r5, r4, r3, r2); |
| __ SmiUntag(r2); |
| } |
| |
| static void GenerateRecordCallTarget(MacroAssembler* masm) { |
| // Cache the called function in a feedback vector slot. Cache states |
| // are uninitialized, monomorphic (indicated by a JSFunction), and |
| // megamorphic. |
| // r2 : number of arguments to the construct function |
| // r3 : the function to call |
| // r4 : feedback vector |
| // r5 : slot in feedback vector (Smi) |
| Label initialize, done, miss, megamorphic, not_array_function; |
| Label done_initialize_count, done_increment_count; |
| |
| DCHECK_EQ(*TypeFeedbackVector::MegamorphicSentinel(masm->isolate()), |
| masm->isolate()->heap()->megamorphic_symbol()); |
| DCHECK_EQ(*TypeFeedbackVector::UninitializedSentinel(masm->isolate()), |
| masm->isolate()->heap()->uninitialized_symbol()); |
| |
| const int count_offset = FixedArray::kHeaderSize + kPointerSize; |
| |
| // Load the cache state into r7. |
| __ SmiToPtrArrayOffset(r7, r5); |
| __ AddP(r7, r4, r7); |
| __ LoadP(r7, FieldMemOperand(r7, FixedArray::kHeaderSize)); |
| |
| // A monomorphic cache hit or an already megamorphic state: invoke the |
| // function without changing the state. |
| // We don't know if r7 is a WeakCell or a Symbol, but it's harmless to read at |
| // this position in a symbol (see static asserts in type-feedback-vector.h). |
| Label check_allocation_site; |
| Register feedback_map = r8; |
| Register weak_value = r9; |
| __ LoadP(weak_value, FieldMemOperand(r7, WeakCell::kValueOffset)); |
| __ CmpP(r3, weak_value); |
| __ beq(&done_increment_count, Label::kNear); |
| __ CompareRoot(r7, Heap::kmegamorphic_symbolRootIndex); |
| __ beq(&done, Label::kNear); |
| __ LoadP(feedback_map, FieldMemOperand(r7, HeapObject::kMapOffset)); |
| __ CompareRoot(feedback_map, Heap::kWeakCellMapRootIndex); |
| __ bne(&check_allocation_site); |
| |
| // If the weak cell is cleared, we have a new chance to become monomorphic. |
| __ JumpIfSmi(weak_value, &initialize); |
| __ b(&megamorphic); |
| |
| __ bind(&check_allocation_site); |
| // If we came here, we need to see if we are the array function. |
| // If we didn't have a matching function, and we didn't find the megamorph |
| // sentinel, then we have in the slot either some other function or an |
| // AllocationSite. |
| __ CompareRoot(feedback_map, Heap::kAllocationSiteMapRootIndex); |
| __ bne(&miss); |
| |
| // Make sure the function is the Array() function |
| __ LoadNativeContextSlot(Context::ARRAY_FUNCTION_INDEX, r7); |
| __ CmpP(r3, r7); |
| __ bne(&megamorphic); |
| __ b(&done_increment_count, Label::kNear); |
| |
| __ bind(&miss); |
| |
| // A monomorphic miss (i.e, here the cache is not uninitialized) goes |
| // megamorphic. |
| __ CompareRoot(r7, Heap::kuninitialized_symbolRootIndex); |
| __ beq(&initialize); |
| // MegamorphicSentinel is an immortal immovable object (undefined) so no |
| // write-barrier is needed. |
| __ bind(&megamorphic); |
| __ SmiToPtrArrayOffset(r7, r5); |
| __ AddP(r7, r4, r7); |
| __ LoadRoot(ip, Heap::kmegamorphic_symbolRootIndex); |
| __ StoreP(ip, FieldMemOperand(r7, FixedArray::kHeaderSize), r0); |
| __ jmp(&done); |
| |
| // An uninitialized cache is patched with the function |
| __ bind(&initialize); |
| |
| // Make sure the function is the Array() function. |
| __ LoadNativeContextSlot(Context::ARRAY_FUNCTION_INDEX, r7); |
| __ CmpP(r3, r7); |
| __ bne(¬_array_function); |
| |
| // The target function is the Array constructor, |
| // Create an AllocationSite if we don't already have it, store it in the |
| // slot. |
| CreateAllocationSiteStub create_stub(masm->isolate()); |
| CallStubInRecordCallTarget(masm, &create_stub); |
| __ b(&done_initialize_count, Label::kNear); |
| |
| __ bind(¬_array_function); |
| |
| CreateWeakCellStub weak_cell_stub(masm->isolate()); |
| CallStubInRecordCallTarget(masm, &weak_cell_stub); |
| |
| __ bind(&done_initialize_count); |
| // Initialize the call counter. |
| __ LoadSmiLiteral(r7, Smi::FromInt(1)); |
| __ SmiToPtrArrayOffset(r6, r5); |
| __ AddP(r6, r4, r6); |
| __ StoreP(r7, FieldMemOperand(r6, count_offset), r0); |
| __ b(&done, Label::kNear); |
| |
| __ bind(&done_increment_count); |
| |
| // Increment the call count for monomorphic function calls. |
| __ SmiToPtrArrayOffset(r7, r5); |
| __ AddP(r7, r4, r7); |
| |
| __ LoadP(r6, FieldMemOperand(r7, count_offset)); |
| __ AddSmiLiteral(r6, r6, Smi::FromInt(1), r0); |
| __ StoreP(r6, FieldMemOperand(r7, count_offset), r0); |
| |
| __ bind(&done); |
| } |
| |
| void CallConstructStub::Generate(MacroAssembler* masm) { |
| // r2 : number of arguments |
| // r3 : the function to call |
| // r4 : feedback vector |
| // r5 : slot in feedback vector (Smi, for RecordCallTarget) |
| |
| Label non_function; |
| // Check that the function is not a smi. |
| __ JumpIfSmi(r3, &non_function); |
| // Check that the function is a JSFunction. |
| __ CompareObjectType(r3, r7, r7, JS_FUNCTION_TYPE); |
| __ bne(&non_function); |
| |
| GenerateRecordCallTarget(masm); |
| |
| __ SmiToPtrArrayOffset(r7, r5); |
| __ AddP(r7, r4, r7); |
| // Put the AllocationSite from the feedback vector into r4, or undefined. |
| __ LoadP(r4, FieldMemOperand(r7, FixedArray::kHeaderSize)); |
| __ LoadP(r7, FieldMemOperand(r4, AllocationSite::kMapOffset)); |
| __ CompareRoot(r7, Heap::kAllocationSiteMapRootIndex); |
| Label feedback_register_initialized; |
| __ beq(&feedback_register_initialized); |
| __ LoadRoot(r4, Heap::kUndefinedValueRootIndex); |
| __ bind(&feedback_register_initialized); |
| |
| __ AssertUndefinedOrAllocationSite(r4, r7); |
| |
| // Pass function as new target. |
| __ LoadRR(r5, r3); |
| |
| // Tail call to the function-specific construct stub (still in the caller |
| // context at this point). |
| __ LoadP(r6, FieldMemOperand(r3, JSFunction::kSharedFunctionInfoOffset)); |
| __ LoadP(r6, FieldMemOperand(r6, SharedFunctionInfo::kConstructStubOffset)); |
| __ AddP(ip, r6, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| __ JumpToJSEntry(ip); |
| |
| __ bind(&non_function); |
| __ LoadRR(r5, r3); |
| __ Jump(isolate()->builtins()->Construct(), RelocInfo::CODE_TARGET); |
| } |
| |
| void CallICStub::HandleArrayCase(MacroAssembler* masm, Label* miss) { |
| // r3 - function |
| // r5 - slot id |
| // r4 - vector |
| // r6 - allocation site (loaded from vector[slot]) |
| __ LoadNativeContextSlot(Context::ARRAY_FUNCTION_INDEX, r7); |
| __ CmpP(r3, r7); |
| __ bne(miss); |
| |
| __ mov(r2, Operand(arg_count())); |
| |
| // Increment the call count for monomorphic function calls. |
| const int count_offset = FixedArray::kHeaderSize + kPointerSize; |
| __ SmiToPtrArrayOffset(r7, r5); |
| __ AddP(r4, r4, r7); |
| __ LoadP(r5, FieldMemOperand(r4, count_offset)); |
| __ AddSmiLiteral(r5, r5, Smi::FromInt(1), r0); |
| __ StoreP(r5, FieldMemOperand(r4, count_offset), r0); |
| |
| __ LoadRR(r4, r6); |
| __ LoadRR(r5, r3); |
| ArrayConstructorStub stub(masm->isolate(), arg_count()); |
| __ TailCallStub(&stub); |
| } |
| |
| void CallICStub::Generate(MacroAssembler* masm) { |
| // r3 - function |
| // r5 - slot id (Smi) |
| // r4 - vector |
| Label extra_checks_or_miss, call, call_function; |
| int argc = arg_count(); |
| ParameterCount actual(argc); |
| |
| // The checks. First, does r3 match the recorded monomorphic target? |
| __ SmiToPtrArrayOffset(r8, r5); |
| __ AddP(r8, r4, r8); |
| __ LoadP(r6, FieldMemOperand(r8, FixedArray::kHeaderSize)); |
| |
| // We don't know that we have a weak cell. We might have a private symbol |
| // or an AllocationSite, but the memory is safe to examine. |
| // AllocationSite::kTransitionInfoOffset - contains a Smi or pointer to |
| // FixedArray. |
| // WeakCell::kValueOffset - contains a JSFunction or Smi(0) |
| // Symbol::kHashFieldSlot - if the low bit is 1, then the hash is not |
| // computed, meaning that it can't appear to be a pointer. If the low bit is |
| // 0, then hash is computed, but the 0 bit prevents the field from appearing |
| // to be a pointer. |
| STATIC_ASSERT(WeakCell::kSize >= kPointerSize); |
| STATIC_ASSERT(AllocationSite::kTransitionInfoOffset == |
| WeakCell::kValueOffset && |
| WeakCell::kValueOffset == Symbol::kHashFieldSlot); |
| |
| __ LoadP(r7, FieldMemOperand(r6, WeakCell::kValueOffset)); |
| __ CmpP(r3, r7); |
| __ bne(&extra_checks_or_miss, Label::kNear); |
| |
| // The compare above could have been a SMI/SMI comparison. Guard against this |
| // convincing us that we have a monomorphic JSFunction. |
| __ JumpIfSmi(r3, &extra_checks_or_miss); |
| |
| // Increment the call count for monomorphic function calls. |
| const int count_offset = FixedArray::kHeaderSize + kPointerSize; |
| __ LoadP(r5, FieldMemOperand(r8, count_offset)); |
| __ AddSmiLiteral(r5, r5, Smi::FromInt(1), r0); |
| __ StoreP(r5, FieldMemOperand(r8, count_offset), r0); |
| |
| __ bind(&call_function); |
| __ mov(r2, Operand(argc)); |
| __ Jump(masm->isolate()->builtins()->CallFunction(convert_mode(), |
| tail_call_mode()), |
| RelocInfo::CODE_TARGET); |
| |
| __ bind(&extra_checks_or_miss); |
| Label uninitialized, miss, not_allocation_site; |
| |
| __ CompareRoot(r6, Heap::kmegamorphic_symbolRootIndex); |
| __ beq(&call); |
| |
| // Verify that r6 contains an AllocationSite |
| __ LoadP(r7, FieldMemOperand(r6, HeapObject::kMapOffset)); |
| __ CompareRoot(r7, Heap::kAllocationSiteMapRootIndex); |
| __ bne(¬_allocation_site); |
| |
| // We have an allocation site. |
| HandleArrayCase(masm, &miss); |
| |
| __ bind(¬_allocation_site); |
| |
| // The following cases attempt to handle MISS cases without going to the |
| // runtime. |
| if (FLAG_trace_ic) { |
| __ b(&miss); |
| } |
| |
| __ CompareRoot(r6, Heap::kuninitialized_symbolRootIndex); |
| __ beq(&uninitialized); |
| |
| // We are going megamorphic. If the feedback is a JSFunction, it is fine |
| // to handle it here. More complex cases are dealt with in the runtime. |
| __ AssertNotSmi(r6); |
| __ CompareObjectType(r6, r7, r7, JS_FUNCTION_TYPE); |
| __ bne(&miss); |
| __ LoadRoot(ip, Heap::kmegamorphic_symbolRootIndex); |
| __ StoreP(ip, FieldMemOperand(r8, FixedArray::kHeaderSize), r0); |
| |
| __ bind(&call); |
| __ mov(r2, Operand(argc)); |
| __ Jump(masm->isolate()->builtins()->Call(convert_mode(), tail_call_mode()), |
| RelocInfo::CODE_TARGET); |
| |
| __ bind(&uninitialized); |
| |
| // We are going monomorphic, provided we actually have a JSFunction. |
| __ JumpIfSmi(r3, &miss); |
| |
| // Goto miss case if we do not have a function. |
| __ CompareObjectType(r3, r6, r6, JS_FUNCTION_TYPE); |
| __ bne(&miss); |
| |
| // Make sure the function is not the Array() function, which requires special |
| // behavior on MISS. |
| __ LoadNativeContextSlot(Context::ARRAY_FUNCTION_INDEX, r6); |
| __ CmpP(r3, r6); |
| __ beq(&miss); |
| |
| // Make sure the function belongs to the same native context. |
| __ LoadP(r6, FieldMemOperand(r3, JSFunction::kContextOffset)); |
| __ LoadP(r6, ContextMemOperand(r6, Context::NATIVE_CONTEXT_INDEX)); |
| __ LoadP(ip, NativeContextMemOperand()); |
| __ CmpP(r6, ip); |
| __ bne(&miss); |
| |
| // Initialize the call counter. |
| __ LoadSmiLiteral(r7, Smi::FromInt(1)); |
| __ StoreP(r7, FieldMemOperand(r8, count_offset), r0); |
| |
| // Store the function. Use a stub since we need a frame for allocation. |
| // r4 - vector |
| // r5 - slot |
| // r3 - function |
| { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| CreateWeakCellStub create_stub(masm->isolate()); |
| __ Push(r3); |
| __ CallStub(&create_stub); |
| __ Pop(r3); |
| } |
| |
| __ b(&call_function); |
| |
| // We are here because tracing is on or we encountered a MISS case we can't |
| // handle here. |
| __ bind(&miss); |
| GenerateMiss(masm); |
| |
| __ b(&call); |
| } |
| |
| void CallICStub::GenerateMiss(MacroAssembler* masm) { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| |
| // Push the function and feedback info. |
| __ Push(r3, r4, r5); |
| |
| // Call the entry. |
| __ CallRuntime(Runtime::kCallIC_Miss); |
| |
| // Move result to r3 and exit the internal frame. |
| __ LoadRR(r3, r2); |
| } |
| |
| // StringCharCodeAtGenerator |
| void StringCharCodeAtGenerator::GenerateFast(MacroAssembler* masm) { |
| // If the receiver is a smi trigger the non-string case. |
| if (check_mode_ == RECEIVER_IS_UNKNOWN) { |
| __ JumpIfSmi(object_, receiver_not_string_); |
| |
| // Fetch the instance type of the receiver into result register. |
| __ LoadP(result_, FieldMemOperand(object_, HeapObject::kMapOffset)); |
| __ LoadlB(result_, FieldMemOperand(result_, Map::kInstanceTypeOffset)); |
| // If the receiver is not a string trigger the non-string case. |
| __ mov(r0, Operand(kIsNotStringMask)); |
| __ AndP(r0, result_); |
| __ bne(receiver_not_string_); |
| } |
| |
| // If the index is non-smi trigger the non-smi case. |
| __ JumpIfNotSmi(index_, &index_not_smi_); |
| __ bind(&got_smi_index_); |
| |
| // Check for index out of range. |
| __ LoadP(ip, FieldMemOperand(object_, String::kLengthOffset)); |
| __ CmpLogicalP(ip, index_); |
| __ ble(index_out_of_range_); |
| |
| __ SmiUntag(index_); |
| |
| StringCharLoadGenerator::Generate(masm, object_, index_, result_, |
| &call_runtime_); |
| |
| __ SmiTag(result_); |
| __ bind(&exit_); |
| } |
| |
| void StringCharCodeAtGenerator::GenerateSlow( |
| MacroAssembler* masm, EmbedMode embed_mode, |
| const RuntimeCallHelper& call_helper) { |
| __ Abort(kUnexpectedFallthroughToCharCodeAtSlowCase); |
| |
| // Index is not a smi. |
| __ bind(&index_not_smi_); |
| // If index is a heap number, try converting it to an integer. |
| __ CheckMap(index_, result_, Heap::kHeapNumberMapRootIndex, index_not_number_, |
| DONT_DO_SMI_CHECK); |
| call_helper.BeforeCall(masm); |
| if (embed_mode == PART_OF_IC_HANDLER) { |
| __ Push(LoadWithVectorDescriptor::VectorRegister(), |
| LoadWithVectorDescriptor::SlotRegister(), object_, index_); |
| } else { |
| // index_ is consumed by runtime conversion function. |
| __ Push(object_, index_); |
| } |
| __ CallRuntime(Runtime::kNumberToSmi); |
| // Save the conversion result before the pop instructions below |
| // have a chance to overwrite it. |
| __ Move(index_, r2); |
| if (embed_mode == PART_OF_IC_HANDLER) { |
| __ Pop(LoadWithVectorDescriptor::VectorRegister(), |
| LoadWithVectorDescriptor::SlotRegister(), object_); |
| } else { |
| __ pop(object_); |
| } |
| // Reload the instance type. |
| __ LoadP(result_, FieldMemOperand(object_, HeapObject::kMapOffset)); |
| __ LoadlB(result_, FieldMemOperand(result_, Map::kInstanceTypeOffset)); |
| call_helper.AfterCall(masm); |
| // If index is still not a smi, it must be out of range. |
| __ JumpIfNotSmi(index_, index_out_of_range_); |
| // Otherwise, return to the fast path. |
| __ b(&got_smi_index_); |
| |
| // Call runtime. We get here when the receiver is a string and the |
| // index is a number, but the code of getting the actual character |
| // is too complex (e.g., when the string needs to be flattened). |
| __ bind(&call_runtime_); |
| call_helper.BeforeCall(masm); |
| __ SmiTag(index_); |
| __ Push(object_, index_); |
| __ CallRuntime(Runtime::kStringCharCodeAtRT); |
| __ Move(result_, r2); |
| call_helper.AfterCall(masm); |
| __ b(&exit_); |
| |
| __ Abort(kUnexpectedFallthroughFromCharCodeAtSlowCase); |
| } |
| |
| // ------------------------------------------------------------------------- |
| // StringCharFromCodeGenerator |
| |
| void StringCharFromCodeGenerator::GenerateFast(MacroAssembler* masm) { |
| // Fast case of Heap::LookupSingleCharacterStringFromCode. |
| DCHECK(base::bits::IsPowerOfTwo32(String::kMaxOneByteCharCodeU + 1)); |
| __ LoadSmiLiteral(r0, Smi::FromInt(~String::kMaxOneByteCharCodeU)); |
| __ OrP(r0, r0, Operand(kSmiTagMask)); |
| __ AndP(r0, code_, r0); |
| __ bne(&slow_case_); |
| |
| __ LoadRoot(result_, Heap::kSingleCharacterStringCacheRootIndex); |
| // At this point code register contains smi tagged one-byte char code. |
| __ LoadRR(r0, code_); |
| __ SmiToPtrArrayOffset(code_, code_); |
| __ AddP(result_, code_); |
| __ LoadRR(code_, r0); |
| __ LoadP(result_, FieldMemOperand(result_, FixedArray::kHeaderSize)); |
| __ CompareRoot(result_, Heap::kUndefinedValueRootIndex); |
| __ beq(&slow_case_); |
| __ bind(&exit_); |
| } |
| |
| void StringCharFromCodeGenerator::GenerateSlow( |
| MacroAssembler* masm, const RuntimeCallHelper& call_helper) { |
| __ Abort(kUnexpectedFallthroughToCharFromCodeSlowCase); |
| |
| __ bind(&slow_case_); |
| call_helper.BeforeCall(masm); |
| __ push(code_); |
| __ CallRuntime(Runtime::kStringCharFromCode); |
| __ Move(result_, r2); |
| call_helper.AfterCall(masm); |
| __ b(&exit_); |
| |
| __ Abort(kUnexpectedFallthroughFromCharFromCodeSlowCase); |
| } |
| |
| enum CopyCharactersFlags { COPY_ASCII = 1, DEST_ALWAYS_ALIGNED = 2 }; |
| |
| void StringHelper::GenerateCopyCharacters(MacroAssembler* masm, Register dest, |
| Register src, Register count, |
| Register scratch, |
| String::Encoding encoding) { |
| if (FLAG_debug_code) { |
| // Check that destination is word aligned. |
| __ mov(r0, Operand(kPointerAlignmentMask)); |
| __ AndP(r0, dest); |
| __ Check(eq, kDestinationOfCopyNotAligned, cr0); |
| } |
| |
| // Nothing to do for zero characters. |
| Label done; |
| if (encoding == String::TWO_BYTE_ENCODING) { |
| // double the length |
| __ AddP(count, count, count); |
| __ beq(&done, Label::kNear); |
| } else { |
| __ CmpP(count, Operand::Zero()); |
| __ beq(&done, Label::kNear); |
| } |
| |
| // Copy count bytes from src to dst. |
| Label byte_loop; |
| // TODO(joransiu): Convert into MVC loop |
| __ bind(&byte_loop); |
| __ LoadlB(scratch, MemOperand(src)); |
| __ la(src, MemOperand(src, 1)); |
| __ stc(scratch, MemOperand(dest)); |
| __ la(dest, MemOperand(dest, 1)); |
| __ BranchOnCount(count, &byte_loop); |
| |
| __ bind(&done); |
| } |
| |
| void SubStringStub::Generate(MacroAssembler* masm) { |
| Label runtime; |
| |
| // Stack frame on entry. |
| // lr: return address |
| // sp[0]: to |
| // sp[4]: from |
| // sp[8]: string |
| |
| // This stub is called from the native-call %_SubString(...), so |
| // nothing can be assumed about the arguments. It is tested that: |
| // "string" is a sequential string, |
| // both "from" and "to" are smis, and |
| // 0 <= from <= to <= string.length. |
| // If any of these assumptions fail, we call the runtime system. |
| |
| const int kToOffset = 0 * kPointerSize; |
| const int kFromOffset = 1 * kPointerSize; |
| const int kStringOffset = 2 * kPointerSize; |
| |
| __ LoadP(r4, MemOperand(sp, kToOffset)); |
| __ LoadP(r5, MemOperand(sp, kFromOffset)); |
| |
| // If either to or from had the smi tag bit set, then fail to generic runtime |
| __ JumpIfNotSmi(r4, &runtime); |
| __ JumpIfNotSmi(r5, &runtime); |
| __ SmiUntag(r4); |
| __ SmiUntag(r5); |
| // Both r4 and r5 are untagged integers. |
| |
| // We want to bailout to runtime here if From is negative. |
| __ blt(&runtime); // From < 0. |
| |
| __ CmpLogicalP(r5, r4); |
| __ bgt(&runtime); // Fail if from > to. |
| __ SubP(r4, r4, r5); |
| |
| // Make sure first argument is a string. |
| __ LoadP(r2, MemOperand(sp, kStringOffset)); |
| __ JumpIfSmi(r2, &runtime); |
| Condition is_string = masm->IsObjectStringType(r2, r3); |
| __ b(NegateCondition(is_string), &runtime); |
| |
| Label single_char; |
| __ CmpP(r4, Operand(1)); |
| __ b(eq, &single_char); |
| |
| // Short-cut for the case of trivial substring. |
| Label return_r2; |
| // r2: original string |
| // r4: result string length |
| __ LoadP(r6, FieldMemOperand(r2, String::kLengthOffset)); |
| __ SmiUntag(r0, r6); |
| __ CmpLogicalP(r4, r0); |
| // Return original string. |
| __ beq(&return_r2); |
| // Longer than original string's length or negative: unsafe arguments. |
| __ bgt(&runtime); |
| // Shorter than original string's length: an actual substring. |
| |
| // Deal with different string types: update the index if necessary |
| // and put the underlying string into r7. |
| // r2: original string |
| // r3: instance type |
| // r4: length |
| // r5: from index (untagged) |
| Label underlying_unpacked, sliced_string, seq_or_external_string; |
| // If the string is not indirect, it can only be sequential or external. |
| STATIC_ASSERT(kIsIndirectStringMask == (kSlicedStringTag & kConsStringTag)); |
| STATIC_ASSERT(kIsIndirectStringMask != 0); |
| __ mov(r0, Operand(kIsIndirectStringMask)); |
| __ AndP(r0, r3); |
| __ beq(&seq_or_external_string); |
| |
| __ mov(r0, Operand(kSlicedNotConsMask)); |
| __ AndP(r0, r3); |
| __ bne(&sliced_string); |
| // Cons string. Check whether it is flat, then fetch first part. |
| __ LoadP(r7, FieldMemOperand(r2, ConsString::kSecondOffset)); |
| __ CompareRoot(r7, Heap::kempty_stringRootIndex); |
| __ bne(&runtime); |
| __ LoadP(r7, FieldMemOperand(r2, ConsString::kFirstOffset)); |
| // Update instance type. |
| __ LoadP(r3, FieldMemOperand(r7, HeapObject::kMapOffset)); |
| __ LoadlB(r3, FieldMemOperand(r3, Map::kInstanceTypeOffset)); |
| __ b(&underlying_unpacked); |
| |
| __ bind(&sliced_string); |
| // Sliced string. Fetch parent and correct start index by offset. |
| __ LoadP(r7, FieldMemOperand(r2, SlicedString::kParentOffset)); |
| __ LoadP(r6, FieldMemOperand(r2, SlicedString::kOffsetOffset)); |
| __ SmiUntag(r3, r6); |
| __ AddP(r5, r3); // Add offset to index. |
| // Update instance type. |
| __ LoadP(r3, FieldMemOperand(r7, HeapObject::kMapOffset)); |
| __ LoadlB(r3, FieldMemOperand(r3, Map::kInstanceTypeOffset)); |
| __ b(&underlying_unpacked); |
| |
| __ bind(&seq_or_external_string); |
| // Sequential or external string. Just move string to the expected register. |
| __ LoadRR(r7, r2); |
| |
| __ bind(&underlying_unpacked); |
| |
| if (FLAG_string_slices) { |
| Label copy_routine; |
| // r7: underlying subject string |
| // r3: instance type of underlying subject string |
| // r4: length |
| // r5: adjusted start index (untagged) |
| __ CmpP(r4, Operand(SlicedString::kMinLength)); |
| // Short slice. Copy instead of slicing. |
| __ blt(©_routine); |
| // Allocate new sliced string. At this point we do not reload the instance |
| // type including the string encoding because we simply rely on the info |
| // provided by the original string. It does not matter if the original |
| // string's encoding is wrong because we always have to recheck encoding of |
| // the newly created string's parent anyways due to externalized strings. |
| Label two_byte_slice, set_slice_header; |
| STATIC_ASSERT((kStringEncodingMask & kOneByteStringTag) != 0); |
| STATIC_ASSERT((kStringEncodingMask & kTwoByteStringTag) == 0); |
| __ mov(r0, Operand(kStringEncodingMask)); |
| __ AndP(r0, r3); |
| __ beq(&two_byte_slice); |
| __ AllocateOneByteSlicedString(r2, r4, r8, r9, &runtime); |
| __ b(&set_slice_header); |
| __ bind(&two_byte_slice); |
| __ AllocateTwoByteSlicedString(r2, r4, r8, r9, &runtime); |
| __ bind(&set_slice_header); |
| __ SmiTag(r5); |
| __ StoreP(r7, FieldMemOperand(r2, SlicedString::kParentOffset)); |
| __ StoreP(r5, FieldMemOperand(r2, SlicedString::kOffsetOffset)); |
| __ b(&return_r2); |
| |
| __ bind(©_routine); |
| } |
| |
| // r7: underlying subject string |
| // r3: instance type of underlying subject string |
| // r4: length |
| // r5: adjusted start index (untagged) |
| Label two_byte_sequential, sequential_string, allocate_result; |
| STATIC_ASSERT(kExternalStringTag != 0); |
| STATIC_ASSERT(kSeqStringTag == 0); |
| __ mov(r0, Operand(kExternalStringTag)); |
| __ AndP(r0, r3); |
| __ beq(&sequential_string); |
| |
| // Handle external string. |
| // Rule out short external strings. |
| STATIC_ASSERT(kShortExternalStringTag != 0); |
| __ mov(r0, Operand(kShortExternalStringTag)); |
| __ AndP(r0, r3); |
| __ bne(&runtime); |
| __ LoadP(r7, FieldMemOperand(r7, ExternalString::kResourceDataOffset)); |
| // r7 already points to the first character of underlying string. |
| __ b(&allocate_result); |
| |
| __ bind(&sequential_string); |
| // Locate first character of underlying subject string. |
| STATIC_ASSERT(SeqTwoByteString::kHeaderSize == SeqOneByteString::kHeaderSize); |
| __ AddP(r7, Operand(SeqOneByteString::kHeaderSize - kHeapObjectTag)); |
| |
| __ bind(&allocate_result); |
| // Sequential acii string. Allocate the result. |
| STATIC_ASSERT((kOneByteStringTag & kStringEncodingMask) != 0); |
| __ mov(r0, Operand(kStringEncodingMask)); |
| __ AndP(r0, r3); |
| __ beq(&two_byte_sequential); |
| |
| // Allocate and copy the resulting one-byte string. |
| __ AllocateOneByteString(r2, r4, r6, r8, r9, &runtime); |
| |
| // Locate first character of substring to copy. |
| __ AddP(r7, r5); |
| // Locate first character of result. |
| __ AddP(r3, r2, Operand(SeqOneByteString::kHeaderSize - kHeapObjectTag)); |
| |
| // r2: result string |
| // r3: first character of result string |
| // r4: result string length |
| // r7: first character of substring to copy |
| STATIC_ASSERT((SeqOneByteString::kHeaderSize & kObjectAlignmentMask) == 0); |
| StringHelper::GenerateCopyCharacters(masm, r3, r7, r4, r5, |
| String::ONE_BYTE_ENCODING); |
| __ b(&return_r2); |
| |
| // Allocate and copy the resulting two-byte string. |
| __ bind(&two_byte_sequential); |
| __ AllocateTwoByteString(r2, r4, r6, r8, r9, &runtime); |
| |
| // Locate first character of substring to copy. |
| __ ShiftLeftP(r3, r5, Operand(1)); |
| __ AddP(r7, r3); |
| // Locate first character of result. |
| __ AddP(r3, r2, Operand(SeqTwoByteString::kHeaderSize - kHeapObjectTag)); |
| |
| // r2: result string. |
| // r3: first character of result. |
| // r4: result length. |
| // r7: first character of substring to copy. |
| STATIC_ASSERT((SeqTwoByteString::kHeaderSize & kObjectAlignmentMask) == 0); |
| StringHelper::GenerateCopyCharacters(masm, r3, r7, r4, r5, |
| String::TWO_BYTE_ENCODING); |
| |
| __ bind(&return_r2); |
| Counters* counters = isolate()->counters(); |
| __ IncrementCounter(counters->sub_string_native(), 1, r5, r6); |
| __ Drop(3); |
| __ Ret(); |
| |
| // Just jump to runtime to create the sub string. |
| __ bind(&runtime); |
| __ TailCallRuntime(Runtime::kSubString); |
| |
| __ bind(&single_char); |
| // r2: original string |
| // r3: instance type |
| // r4: length |
| // r5: from index (untagged) |
| __ SmiTag(r5, r5); |
| StringCharAtGenerator generator(r2, r5, r4, r2, &runtime, &runtime, &runtime, |
| RECEIVER_IS_STRING); |
| generator.GenerateFast(masm); |
| __ Drop(3); |
| __ Ret(); |
| generator.SkipSlow(masm, &runtime); |
| } |
| |
| void ToStringStub::Generate(MacroAssembler* masm) { |
| // The ToString stub takes one argument in r2. |
| Label done; |
| Label is_number; |
| __ JumpIfSmi(r2, &is_number); |
| |
| __ CompareObjectType(r2, r3, r3, FIRST_NONSTRING_TYPE); |
| // r2: receiver |
| // r3: receiver instance type |
| __ blt(&done); |
| |
| Label not_heap_number; |
| __ CmpP(r3, Operand(HEAP_NUMBER_TYPE)); |
| __ bne(¬_heap_number); |
| __ bind(&is_number); |
| NumberToStringStub stub(isolate()); |
| __ TailCallStub(&stub); |
| __ bind(¬_heap_number); |
| |
| Label not_oddball; |
| __ CmpP(r3, Operand(ODDBALL_TYPE)); |
| __ bne(¬_oddball); |
| __ LoadP(r2, FieldMemOperand(r2, Oddball::kToStringOffset)); |
| __ Ret(); |
| __ bind(¬_oddball); |
| |
| __ push(r2); // Push argument. |
| __ TailCallRuntime(Runtime::kToString); |
| |
| __ bind(&done); |
| __ Ret(); |
| } |
| |
| void ToNameStub::Generate(MacroAssembler* masm) { |
| // The ToName stub takes one argument in r2. |
| Label is_number; |
| __ JumpIfSmi(r2, &is_number); |
| |
| STATIC_ASSERT(FIRST_NAME_TYPE == FIRST_TYPE); |
| __ CompareObjectType(r2, r3, r3, LAST_NAME_TYPE); |
| // r2: receiver |
| // r3: receiver instance type |
| __ Ret(le); |
| |
| Label not_heap_number; |
| __ CmpP(r3, Operand(HEAP_NUMBER_TYPE)); |
| __ bne(¬_heap_number); |
| __ bind(&is_number); |
| NumberToStringStub stub(isolate()); |
| __ TailCallStub(&stub); |
| __ bind(¬_heap_number); |
| |
| Label not_oddball; |
| __ CmpP(r3, Operand(ODDBALL_TYPE)); |
| __ bne(¬_oddball); |
| __ LoadP(r2, FieldMemOperand(r2, Oddball::kToStringOffset)); |
| __ Ret(); |
| __ bind(¬_oddball); |
| |
| __ push(r2); // Push argument. |
| __ TailCallRuntime(Runtime::kToName); |
| } |
| |
| void StringHelper::GenerateFlatOneByteStringEquals(MacroAssembler* masm, |
| Register left, |
| Register right, |
| Register scratch1, |
| Register scratch2) { |
| Register length = scratch1; |
| |
| // Compare lengths. |
| Label strings_not_equal, check_zero_length; |
| __ LoadP(length, FieldMemOperand(left, String::kLengthOffset)); |
| __ LoadP(scratch2, FieldMemOperand(right, String::kLengthOffset)); |
| __ CmpP(length, scratch2); |
| __ beq(&check_zero_length); |
| __ bind(&strings_not_equal); |
| __ LoadSmiLiteral(r2, Smi::FromInt(NOT_EQUAL)); |
| __ Ret(); |
| |
| // Check if the length is zero. |
| Label compare_chars; |
| __ bind(&check_zero_length); |
| STATIC_ASSERT(kSmiTag == 0); |
| __ CmpP(length, Operand::Zero()); |
| __ bne(&compare_chars); |
| __ LoadSmiLiteral(r2, Smi::FromInt(EQUAL)); |
| __ Ret(); |
| |
| // Compare characters. |
| __ bind(&compare_chars); |
| GenerateOneByteCharsCompareLoop(masm, left, right, length, scratch2, |
| &strings_not_equal); |
| |
| // Characters are equal. |
| __ LoadSmiLiteral(r2, Smi::FromInt(EQUAL)); |
| __ Ret(); |
| } |
| |
| void StringHelper::GenerateCompareFlatOneByteStrings( |
| MacroAssembler* masm, Register left, Register right, Register scratch1, |
| Register scratch2, Register scratch3) { |
| Label skip, result_not_equal, compare_lengths; |
| // Find minimum length and length difference. |
| __ LoadP(scratch1, FieldMemOperand(left, String::kLengthOffset)); |
| __ LoadP(scratch2, FieldMemOperand(right, String::kLengthOffset)); |
| __ SubP(scratch3, scratch1, scratch2 /*, LeaveOE, SetRC*/); |
| // Removing RC looks okay here. |
| Register length_delta = scratch3; |
| __ ble(&skip, Label::kNear); |
| __ LoadRR(scratch1, scratch2); |
| __ bind(&skip); |
| Register min_length = scratch1; |
| STATIC_ASSERT(kSmiTag == 0); |
| __ CmpP(min_length, Operand::Zero()); |
| __ beq(&compare_lengths); |
| |
| // Compare loop. |
| GenerateOneByteCharsCompareLoop(masm, left, right, min_length, scratch2, |
| &result_not_equal); |
| |
| // Compare lengths - strings up to min-length are equal. |
| __ bind(&compare_lengths); |
| DCHECK(Smi::FromInt(EQUAL) == static_cast<Smi*>(0)); |
| // Use length_delta as result if it's zero. |
| __ LoadRR(r2, length_delta); |
| __ CmpP(length_delta, Operand::Zero()); |
| __ bind(&result_not_equal); |
| // Conditionally update the result based either on length_delta or |
| // the last comparion performed in the loop above. |
| Label less_equal, equal; |
| __ ble(&less_equal); |
| __ LoadSmiLiteral(r2, Smi::FromInt(GREATER)); |
| __ Ret(); |
| __ bind(&less_equal); |
| __ beq(&equal); |
| __ LoadSmiLiteral(r2, Smi::FromInt(LESS)); |
| __ bind(&equal); |
| __ Ret(); |
| } |
| |
| void StringHelper::GenerateOneByteCharsCompareLoop( |
| MacroAssembler* masm, Register left, Register right, Register length, |
| Register scratch1, Label* chars_not_equal) { |
| // Change index to run from -length to -1 by adding length to string |
| // start. This means that loop ends when index reaches zero, which |
| // doesn't need an additional compare. |
| __ SmiUntag(length); |
| __ AddP(scratch1, length, |
| Operand(SeqOneByteString::kHeaderSize - kHeapObjectTag)); |
| __ AddP(left, scratch1); |
| __ AddP(right, scratch1); |
| __ LoadComplementRR(length, length); |
| Register index = length; // index = -length; |
| |
| // Compare loop. |
| Label loop; |
| __ bind(&loop); |
| __ LoadlB(scratch1, MemOperand(left, index)); |
| __ LoadlB(r0, MemOperand(right, index)); |
| __ CmpP(scratch1, r0); |
| __ bne(chars_not_equal); |
| __ AddP(index, Operand(1)); |
| __ CmpP(index, Operand::Zero()); |
| __ bne(&loop); |
| } |
| |
| void BinaryOpICWithAllocationSiteStub::Generate(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- r3 : left |
| // -- r2 : right |
| // r3: second string |
| // ----------------------------------- |
| |
| // Load r4 with the allocation site. We stick an undefined dummy value here |
| // and replace it with the real allocation site later when we instantiate this |
| // stub in BinaryOpICWithAllocationSiteStub::GetCodeCopyFromTemplate(). |
| __ Move(r4, isolate()->factory()->undefined_value()); |
| |
| // Make sure that we actually patched the allocation site. |
| if (FLAG_debug_code) { |
| __ TestIfSmi(r4); |
| __ Assert(ne, kExpectedAllocationSite, cr0); |
| __ push(r4); |
| __ LoadP(r4, FieldMemOperand(r4, HeapObject::kMapOffset)); |
| __ CompareRoot(r4, Heap::kAllocationSiteMapRootIndex); |
| __ pop(r4); |
| __ Assert(eq, kExpectedAllocationSite); |
| } |
| |
| // Tail call into the stub that handles binary operations with allocation |
| // sites. |
| BinaryOpWithAllocationSiteStub stub(isolate(), state()); |
| __ TailCallStub(&stub); |
| } |
| |
| void CompareICStub::GenerateBooleans(MacroAssembler* masm) { |
| DCHECK_EQ(CompareICState::BOOLEAN, state()); |
| Label miss; |
| |
| __ CheckMap(r3, r4, Heap::kBooleanMapRootIndex, &miss, DO_SMI_CHECK); |
| __ CheckMap(r2, r5, Heap::kBooleanMapRootIndex, &miss, DO_SMI_CHECK); |
| if (!Token::IsEqualityOp(op())) { |
| __ LoadP(r3, FieldMemOperand(r3, Oddball::kToNumberOffset)); |
| __ AssertSmi(r3); |
| __ LoadP(r2, FieldMemOperand(r2, Oddball::kToNumberOffset)); |
| __ AssertSmi(r2); |
| } |
| __ SubP(r2, r3, r2); |
| __ Ret(); |
| |
| __ bind(&miss); |
| GenerateMiss(masm); |
| } |
| |
| void CompareICStub::GenerateSmis(MacroAssembler* masm) { |
| DCHECK(state() == CompareICState::SMI); |
| Label miss; |
| __ OrP(r4, r3, r2); |
| __ JumpIfNotSmi(r4, &miss); |
| |
| if (GetCondition() == eq) { |
| // For equality we do not care about the sign of the result. |
| // __ sub(r2, r2, r3, SetCC); |
| __ SubP(r2, r2, r3); |
| } else { |
| // Untag before subtracting to avoid handling overflow. |
| __ SmiUntag(r3); |
| __ SmiUntag(r2); |
| __ SubP(r2, r3, r2); |
| } |
| __ Ret(); |
| |
| __ bind(&miss); |
| GenerateMiss(masm); |
| } |
| |
| void CompareICStub::GenerateNumbers(MacroAssembler* masm) { |
| DCHECK(state() == CompareICState::NUMBER); |
| |
| Label generic_stub; |
| Label unordered, maybe_undefined1, maybe_undefined2; |
| Label miss; |
| Label equal, less_than; |
| |
| if (left() == CompareICState::SMI) { |
| __ JumpIfNotSmi(r3, &miss); |
| } |
| if (right() == CompareICState::SMI) { |
| __ JumpIfNotSmi(r2, &miss); |
| } |
| |
| // Inlining the double comparison and falling back to the general compare |
| // stub if NaN is involved. |
| // Load left and right operand. |
| Label done, left, left_smi, right_smi; |
| __ JumpIfSmi(r2, &right_smi); |
| __ CheckMap(r2, r4, Heap::kHeapNumberMapRootIndex, &maybe_undefined1, |
| DONT_DO_SMI_CHECK); |
| __ LoadDouble(d1, FieldMemOperand(r2, HeapNumber::kValueOffset)); |
| __ b(&left); |
| __ bind(&right_smi); |
| __ SmiToDouble(d1, r2); |
| |
| __ bind(&left); |
| __ JumpIfSmi(r3, &left_smi); |
| __ CheckMap(r3, r4, Heap::kHeapNumberMapRootIndex, &maybe_undefined2, |
| DONT_DO_SMI_CHECK); |
| __ LoadDouble(d0, FieldMemOperand(r3, HeapNumber::kValueOffset)); |
| __ b(&done); |
| __ bind(&left_smi); |
| __ SmiToDouble(d0, r3); |
| |
| __ bind(&done); |
| |
| // Compare operands |
| __ cdbr(d0, d1); |
| |
| // Don't base result on status bits when a NaN is involved. |
| __ bunordered(&unordered); |
| |
| // Return a result of -1, 0, or 1, based on status bits. |
| __ beq(&equal); |
| __ blt(&less_than); |
| // assume greater than |
| __ LoadImmP(r2, Operand(GREATER)); |
| __ Ret(); |
| __ bind(&equal); |
| __ LoadImmP(r2, Operand(EQUAL)); |
| __ Ret(); |
| __ bind(&less_than); |
| __ LoadImmP(r2, Operand(LESS)); |
| __ Ret(); |
| |
| __ bind(&unordered); |
| __ bind(&generic_stub); |
| CompareICStub stub(isolate(), op(), CompareICState::GENERIC, |
| CompareICState::GENERIC, CompareICState::GENERIC); |
| __ Jump(stub.GetCode(), RelocInfo::CODE_TARGET); |
| |
| __ bind(&maybe_undefined1); |
| if (Token::IsOrderedRelationalCompareOp(op())) { |
| __ CompareRoot(r2, Heap::kUndefinedValueRootIndex); |
| __ bne(&miss); |
| __ JumpIfSmi(r3, &unordered); |
| __ CompareObjectType(r3, r4, r4, HEAP_NUMBER_TYPE); |
| __ bne(&maybe_undefined2); |
| __ b(&unordered); |
| } |
| |
| __ bind(&maybe_undefined2); |
| if (Token::IsOrderedRelationalCompareOp(op())) { |
| __ CompareRoot(r3, Heap::kUndefinedValueRootIndex); |
| __ beq(&unordered); |
| } |
| |
| __ bind(&miss); |
| GenerateMiss(masm); |
| } |
| |
| void CompareICStub::GenerateInternalizedStrings(MacroAssembler* masm) { |
| DCHECK(state() == CompareICState::INTERNALIZED_STRING); |
| Label miss, not_equal; |
| |
| // Registers containing left and right operands respectively. |
| Register left = r3; |
| Register right = r2; |
| Register tmp1 = r4; |
| Register tmp2 = r5; |
| |
| // Check that both operands are heap objects. |
| __ JumpIfEitherSmi(left, right, &miss); |
| |
| // Check that both operands are symbols. |
| __ LoadP(tmp1, FieldMemOperand(left, HeapObject::kMapOffset)); |
| __ LoadP(tmp2, FieldMemOperand(right, HeapObject::kMapOffset)); |
| __ LoadlB(tmp1, FieldMemOperand(tmp1, Map::kInstanceTypeOffset)); |
| __ LoadlB(tmp2, FieldMemOperand(tmp2, Map::kInstanceTypeOffset)); |
| STATIC_ASSERT(kInternalizedTag == 0 && kStringTag == 0); |
| __ OrP(tmp1, tmp1, tmp2); |
| __ AndP(r0, tmp1, Operand(kIsNotStringMask | kIsNotInternalizedMask)); |
| __ bne(&miss); |
| |
| // Internalized strings are compared by identity. |
| __ CmpP(left, right); |
| __ bne(¬_equal); |
| // Make sure r2 is non-zero. At this point input operands are |
| // guaranteed to be non-zero. |
| DCHECK(right.is(r2)); |
| STATIC_ASSERT(EQUAL == 0); |
| STATIC_ASSERT(kSmiTag == 0); |
| __ LoadSmiLiteral(r2, Smi::FromInt(EQUAL)); |
| __ bind(¬_equal); |
| __ Ret(); |
| |
| __ bind(&miss); |
| GenerateMiss(masm); |
| } |
| |
| void CompareICStub::GenerateUniqueNames(MacroAssembler* masm) { |
| DCHECK(state() == CompareICState::UNIQUE_NAME); |
| DCHECK(GetCondition() == eq); |
| Label miss; |
| |
| // Registers containing left and right operands respectively. |
| Register left = r3; |
| Register right = r2; |
| Register tmp1 = r4; |
| Register tmp2 = r5; |
| |
| // Check that both operands are heap objects. |
| __ JumpIfEitherSmi(left, right, &miss); |
| |
| // Check that both operands are unique names. This leaves the instance |
| // types loaded in tmp1 and tmp2. |
| __ LoadP(tmp1, FieldMemOperand(left, HeapObject::kMapOffset)); |
| __ LoadP(tmp2, FieldMemOperand(right, HeapObject::kMapOffset)); |
| __ LoadlB(tmp1, FieldMemOperand(tmp1, Map::kInstanceTypeOffset)); |
| __ LoadlB(tmp2, FieldMemOperand(tmp2, Map::kInstanceTypeOffset)); |
| |
| __ JumpIfNotUniqueNameInstanceType(tmp1, &miss); |
| __ JumpIfNotUniqueNameInstanceType(tmp2, &miss); |
| |
| // Unique names are compared by identity. |
| __ CmpP(left, right); |
| __ bne(&miss); |
| // Make sure r2 is non-zero. At this point input operands are |
| // guaranteed to be non-zero. |
| DCHECK(right.is(r2)); |
| STATIC_ASSERT(EQUAL == 0); |
| STATIC_ASSERT(kSmiTag == 0); |
| __ LoadSmiLiteral(r2, Smi::FromInt(EQUAL)); |
| __ Ret(); |
| |
| __ bind(&miss); |
| GenerateMiss(masm); |
| } |
| |
| void CompareICStub::GenerateStrings(MacroAssembler* masm) { |
| DCHECK(state() == CompareICState::STRING); |
| Label miss, not_identical, is_symbol; |
| |
| bool equality = Token::IsEqualityOp(op()); |
| |
| // Registers containing left and right operands respectively. |
| Register left = r3; |
| Register right = r2; |
| Register tmp1 = r4; |
| Register tmp2 = r5; |
| Register tmp3 = r6; |
| Register tmp4 = r7; |
| |
| // Check that both operands are heap objects. |
| __ JumpIfEitherSmi(left, right, &miss); |
| |
| // Check that both operands are strings. This leaves the instance |
| // types loaded in tmp1 and tmp2. |
| __ LoadP(tmp1, FieldMemOperand(left, HeapObject::kMapOffset)); |
| __ LoadP(tmp2, FieldMemOperand(right, HeapObject::kMapOffset)); |
| __ LoadlB(tmp1, FieldMemOperand(tmp1, Map::kInstanceTypeOffset)); |
| __ LoadlB(tmp2, FieldMemOperand(tmp2, Map::kInstanceTypeOffset)); |
| STATIC_ASSERT(kNotStringTag != 0); |
| __ OrP(tmp3, tmp1, tmp2); |
| __ AndP(r0, tmp3, Operand(kIsNotStringMask)); |
| __ bne(&miss); |
| |
| // Fast check for identical strings. |
| __ CmpP(left, right); |
| STATIC_ASSERT(EQUAL == 0); |
| STATIC_ASSERT(kSmiTag == 0); |
| __ bne(¬_identical); |
| __ LoadSmiLiteral(r2, Smi::FromInt(EQUAL)); |
| __ Ret(); |
| __ bind(¬_identical); |
| |
| // Handle not identical strings. |
| |
| // Check that both strings are internalized strings. If they are, we're done |
| // because we already know they are not identical. We know they are both |
| // strings. |
| if (equality) { |
| DCHECK(GetCondition() == eq); |
| STATIC_ASSERT(kInternalizedTag == 0); |
| __ OrP(tmp3, tmp1, tmp2); |
| __ AndP(r0, tmp3, Operand(kIsNotInternalizedMask)); |
| __ bne(&is_symbol); |
| // Make sure r2 is non-zero. At this point input operands are |
| // guaranteed to be non-zero. |
| DCHECK(right.is(r2)); |
| __ Ret(); |
| __ bind(&is_symbol); |
| } |
| |
| // Check that both strings are sequential one-byte. |
| Label runtime; |
| __ JumpIfBothInstanceTypesAreNotSequentialOneByte(tmp1, tmp2, tmp3, tmp4, |
| &runtime); |
| |
| // Compare flat one-byte strings. Returns when done. |
| if (equality) { |
| StringHelper::GenerateFlatOneByteStringEquals(masm, left, right, tmp1, |
| tmp2); |
| } else { |
| StringHelper::GenerateCompareFlatOneByteStrings(masm, left, right, tmp1, |
| tmp2, tmp3); |
| } |
| |
| // Handle more complex cases in runtime. |
| __ bind(&runtime); |
| if (equality) { |
| { |
| FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL); |
| __ Push(left, right); |
| __ CallRuntime(Runtime::kStringEqual); |
| } |
| __ LoadRoot(r3, Heap::kTrueValueRootIndex); |
| __ SubP(r2, r2, r3); |
| __ Ret(); |
| } else { |
| __ Push(left, right); |
| __ TailCallRuntime(Runtime::kStringCompare); |
| } |
| |
| __ bind(&miss); |
| GenerateMiss(masm); |
| } |
| |
| void CompareICStub::GenerateReceivers(MacroAssembler* masm) { |
| DCHECK_EQ(CompareICState::RECEIVER, state()); |
| Label miss; |
| __ AndP(r4, r3, r2); |
| __ JumpIfSmi(r4, &miss); |
| |
| STATIC_ASSERT(LAST_TYPE == LAST_JS_RECEIVER_TYPE); |
| __ CompareObjectType(r2, r4, r4, FIRST_JS_RECEIVER_TYPE); |
| __ blt(&miss); |
| __ CompareObjectType(r3, r4, r4, FIRST_JS_RECEIVER_TYPE); |
| __ blt(&miss); |
| |
| DCHECK(GetCondition() == eq); |
| __ SubP(r2, r2, r3); |
| __ Ret(); |
| |
| __ bind(&miss); |
| GenerateMiss(masm); |
| } |
| |
| void CompareICStub::GenerateKnownReceivers(MacroAssembler* masm) { |
| Label miss; |
| Handle<WeakCell> cell = Map::WeakCellForMap(known_map_); |
| __ AndP(r4, r3, r2); |
| __ JumpIfSmi(r4, &miss); |
| __ GetWeakValue(r6, cell); |
| __ LoadP(r4, FieldMemOperand(r2, HeapObject::kMapOffset)); |
| __ LoadP(r5, FieldMemOperand(r3, HeapObject::kMapOffset)); |
| __ CmpP(r4, r6); |
| __ bne(&miss); |
| __ CmpP(r5, r6); |
| __ bne(&miss); |
| |
| if (Token::IsEqualityOp(op())) { |
| __ SubP(r2, r2, r3); |
| __ Ret(); |
| } else { |
| if (op() == Token::LT || op() == Token::LTE) { |
| __ LoadSmiLiteral(r4, Smi::FromInt(GREATER)); |
| } else { |
| __ LoadSmiLiteral(r4, Smi::FromInt(LESS)); |
| } |
| __ Push(r3, r2, r4); |
| __ TailCallRuntime(Runtime::kCompare); |
| } |
| |
| __ bind(&miss); |
| GenerateMiss(masm); |
| } |
| |
| void CompareICStub::GenerateMiss(MacroAssembler* masm) { |
| { |
| // Call the runtime system in a fresh internal frame. |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| __ Push(r3, r2); |
| __ Push(r3, r2); |
| __ LoadSmiLiteral(r0, Smi::FromInt(op())); |
| __ push(r0); |
| __ CallRuntime(Runtime::kCompareIC_Miss); |
| // Compute the entry point of the rewritten stub. |
| __ AddP(r4, r2, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| // Restore registers. |
| __ Pop(r3, r2); |
| } |
| |
| __ JumpToJSEntry(r4); |
| } |
| |
| // This stub is paired with DirectCEntryStub::GenerateCall |
| void DirectCEntryStub::Generate(MacroAssembler* masm) { |
| __ CleanseP(r14); |
| |
| __ b(ip); // Callee will return to R14 directly |
| } |
| |
| void DirectCEntryStub::GenerateCall(MacroAssembler* masm, Register target) { |
| #if ABI_USES_FUNCTION_DESCRIPTORS && !defined(USE_SIMULATOR) |
| // Native AIX/S390X Linux use a function descriptor. |
| __ LoadP(ToRegister(ABI_TOC_REGISTER), MemOperand(target, kPointerSize)); |
| __ LoadP(target, MemOperand(target, 0)); // Instruction address |
| #else |
| // ip needs to be set for DirectCEentryStub::Generate, and also |
| // for ABI_CALL_VIA_IP. |
| __ Move(ip, target); |
| #endif |
| |
| __ call(GetCode(), RelocInfo::CODE_TARGET); // Call the stub. |
| } |
| |
| void NameDictionaryLookupStub::GenerateNegativeLookup( |
| MacroAssembler* masm, Label* miss, Label* done, Register receiver, |
| Register properties, Handle<Name> name, Register scratch0) { |
| DCHECK(name->IsUniqueName()); |
| // If names of slots in range from 1 to kProbes - 1 for the hash value are |
| // not equal to the name and kProbes-th slot is not used (its name is the |
| // undefined value), it guarantees the hash table doesn't contain the |
| // property. It's true even if some slots represent deleted properties |
| // (their names are the hole value). |
| for (int i = 0; i < kInlinedProbes; i++) { |
| // scratch0 points to properties hash. |
| // Compute the masked index: (hash + i + i * i) & mask. |
| Register index = scratch0; |
| // Capacity is smi 2^n. |
| __ LoadP(index, FieldMemOperand(properties, kCapacityOffset)); |
| __ SubP(index, Operand(1)); |
| __ LoadSmiLiteral( |
| ip, Smi::FromInt(name->Hash() + NameDictionary::GetProbeOffset(i))); |
| __ AndP(index, ip); |
| |
| // Scale the index by multiplying by the entry size. |
| STATIC_ASSERT(NameDictionary::kEntrySize == 3); |
| __ ShiftLeftP(ip, index, Operand(1)); |
| __ AddP(index, ip); // index *= 3. |
| |
| Register entity_name = scratch0; |
| // Having undefined at this place means the name is not contained. |
| Register tmp = properties; |
| __ SmiToPtrArrayOffset(ip, index); |
| __ AddP(tmp, properties, ip); |
| __ LoadP(entity_name, FieldMemOperand(tmp, kElementsStartOffset)); |
| |
| DCHECK(!tmp.is(entity_name)); |
| __ CompareRoot(entity_name, Heap::kUndefinedValueRootIndex); |
| __ beq(done); |
| |
| // Stop if found the property. |
| __ CmpP(entity_name, Operand(Handle<Name>(name))); |
| __ beq(miss); |
| |
| Label good; |
| __ CompareRoot(entity_name, Heap::kTheHoleValueRootIndex); |
| __ beq(&good); |
| |
| // Check if the entry name is not a unique name. |
| __ LoadP(entity_name, FieldMemOperand(entity_name, HeapObject::kMapOffset)); |
| __ LoadlB(entity_name, |
| FieldMemOperand(entity_name, Map::kInstanceTypeOffset)); |
| __ JumpIfNotUniqueNameInstanceType(entity_name, miss); |
| __ bind(&good); |
| |
| // Restore the properties. |
| __ LoadP(properties, |
| FieldMemOperand(receiver, JSObject::kPropertiesOffset)); |
| } |
| |
| const int spill_mask = (r0.bit() | r8.bit() | r7.bit() | r6.bit() | r5.bit() | |
| r4.bit() | r3.bit() | r2.bit()); |
| |
| __ LoadRR(r0, r14); |
| __ MultiPush(spill_mask); |
| |
| __ LoadP(r2, FieldMemOperand(receiver, JSObject::kPropertiesOffset)); |
| __ mov(r3, Operand(Handle<Name>(name))); |
| NameDictionaryLookupStub stub(masm->isolate(), NEGATIVE_LOOKUP); |
| __ CallStub(&stub); |
| __ CmpP(r2, Operand::Zero()); |
| |
| __ MultiPop(spill_mask); // MultiPop does not touch condition flags |
| __ LoadRR(r14, r0); |
| |
| __ beq(done); |
| __ bne(miss); |
| } |
| |
| // Probe the name dictionary in the |elements| register. Jump to the |
| // |done| label if a property with the given name is found. Jump to |
| // the |miss| label otherwise. |
| // If lookup was successful |scratch2| will be equal to elements + 4 * index. |
| void NameDictionaryLookupStub::GeneratePositiveLookup( |
| MacroAssembler* masm, Label* miss, Label* done, Register elements, |
| Register name, Register scratch1, Register scratch2) { |
| DCHECK(!elements.is(scratch1)); |
| DCHECK(!elements.is(scratch2)); |
| DCHECK(!name.is(scratch1)); |
| DCHECK(!name.is(scratch2)); |
| |
| __ AssertName(name); |
| |
| // Compute the capacity mask. |
| __ LoadP(scratch1, FieldMemOperand(elements, kCapacityOffset)); |
| __ SmiUntag(scratch1); // convert smi to int |
| __ SubP(scratch1, Operand(1)); |
| |
| // Generate an unrolled loop that performs a few probes before |
| // giving up. Measurements done on Gmail indicate that 2 probes |
| // cover ~93% of loads from dictionaries. |
| for (int i = 0; i < kInlinedProbes; i++) { |
| // Compute the masked index: (hash + i + i * i) & mask. |
| __ LoadlW(scratch2, FieldMemOperand(name, String::kHashFieldOffset)); |
| if (i > 0) { |
| // Add the probe offset (i + i * i) left shifted to avoid right shifting |
| // the hash in a separate instruction. The value hash + i + i * i is right |
| // shifted in the following and instruction. |
| DCHECK(NameDictionary::GetProbeOffset(i) < |
| 1 << (32 - Name::kHashFieldOffset)); |
| __ AddP(scratch2, |
| Operand(NameDictionary::GetProbeOffset(i) << Name::kHashShift)); |
| } |
| __ srl(scratch2, Operand(String::kHashShift)); |
| __ AndP(scratch2, scratch1); |
| |
| // Scale the index by multiplying by the entry size. |
| STATIC_ASSERT(NameDictionary::kEntrySize == 3); |
| // scratch2 = scratch2 * 3. |
| __ ShiftLeftP(ip, scratch2, Operand(1)); |
| __ AddP(scratch2, ip); |
| |
| // Check if the key is identical to the name. |
| __ ShiftLeftP(ip, scratch2, Operand(kPointerSizeLog2)); |
| __ AddP(scratch2, elements, ip); |
| __ LoadP(ip, FieldMemOperand(scratch2, kElementsStartOffset)); |
| __ CmpP(name, ip); |
| __ beq(done); |
| } |
| |
| const int spill_mask = (r0.bit() | r8.bit() | r7.bit() | r6.bit() | r5.bit() | |
| r4.bit() | r3.bit() | r2.bit()) & |
| ~(scratch1.bit() | scratch2.bit()); |
| |
| __ LoadRR(r0, r14); |
| __ MultiPush(spill_mask); |
| if (name.is(r2)) { |
| DCHECK(!elements.is(r3)); |
| __ LoadRR(r3, name); |
| __ LoadRR(r2, elements); |
| } else { |
| __ LoadRR(r2, elements); |
| __ LoadRR(r3, name); |
| } |
| NameDictionaryLookupStub stub(masm->isolate(), POSITIVE_LOOKUP); |
| __ CallStub(&stub); |
| __ LoadRR(r1, r2); |
| __ LoadRR(scratch2, r4); |
| __ MultiPop(spill_mask); |
| __ LoadRR(r14, r0); |
| |
| __ CmpP(r1, Operand::Zero()); |
| __ bne(done); |
| __ beq(miss); |
| } |
| |
| void NameDictionaryLookupStub::Generate(MacroAssembler* masm) { |
| // This stub overrides SometimesSetsUpAFrame() to return false. That means |
| // we cannot call anything that could cause a GC from this stub. |
| // Registers: |
| // result: NameDictionary to probe |
| // r3: key |
| // dictionary: NameDictionary to probe. |
| // index: will hold an index of entry if lookup is successful. |
| // might alias with result_. |
| // Returns: |
| // result_ is zero if lookup failed, non zero otherwise. |
| |
| Register result = r2; |
| Register dictionary = r2; |
| Register key = r3; |
| Register index = r4; |
| Register mask = r5; |
| Register hash = r6; |
| Register undefined = r7; |
| Register entry_key = r8; |
| Register scratch = r8; |
| |
| Label in_dictionary, maybe_in_dictionary, not_in_dictionary; |
| |
| __ LoadP(mask, FieldMemOperand(dictionary, kCapacityOffset)); |
| __ SmiUntag(mask); |
| __ SubP(mask, Operand(1)); |
| |
| __ LoadlW(hash, FieldMemOperand(key, String::kHashFieldOffset)); |
| |
| __ LoadRoot(undefined, Heap::kUndefinedValueRootIndex); |
| |
| for (int i = kInlinedProbes; i < kTotalProbes; i++) { |
| // Compute the masked index: (hash + i + i * i) & mask. |
| // Capacity is smi 2^n. |
| if (i > 0) { |
| // Add the probe offset (i + i * i) left shifted to avoid right shifting |
| // the hash in a separate instruction. The value hash + i + i * i is right |
| // shifted in the following and instruction. |
| DCHECK(NameDictionary::GetProbeOffset(i) < |
| 1 << (32 - Name::kHashFieldOffset)); |
| __ AddP(index, hash, |
| Operand(NameDictionary::GetProbeOffset(i) << Name::kHashShift)); |
| } else { |
| __ LoadRR(index, hash); |
| } |
| __ ShiftRight(r0, index, Operand(String::kHashShift)); |
| __ AndP(index, r0, mask); |
| |
| // Scale the index by multiplying by the entry size. |
| STATIC_ASSERT(NameDictionary::kEntrySize == 3); |
| __ ShiftLeftP(scratch, index, Operand(1)); |
| __ AddP(index, scratch); // index *= 3. |
| |
| __ ShiftLeftP(scratch, index, Operand(kPointerSizeLog2)); |
| __ AddP(index, dictionary, scratch); |
| __ LoadP(entry_key, FieldMemOperand(index, kElementsStartOffset)); |
| |
| // Having undefined at this place means the name is not contained. |
| __ CmpP(entry_key, undefined); |
| __ beq(¬_in_dictionary); |
| |
| // Stop if found the property. |
| __ CmpP(entry_key, key); |
| __ beq(&in_dictionary); |
| |
| if (i != kTotalProbes - 1 && mode() == NEGATIVE_LOOKUP) { |
| // Check if the entry name is not a unique name. |
| __ LoadP(entry_key, FieldMemOperand(entry_key, HeapObject::kMapOffset)); |
| __ LoadlB(entry_key, |
| FieldMemOperand(entry_key, Map::kInstanceTypeOffset)); |
| __ JumpIfNotUniqueNameInstanceType(entry_key, &maybe_in_dictionary); |
| } |
| } |
| |
| __ bind(&maybe_in_dictionary); |
| // If we are doing negative lookup then probing failure should be |
| // treated as a lookup success. For positive lookup probing failure |
| // should be treated as lookup failure. |
| if (mode() == POSITIVE_LOOKUP) { |
| __ LoadImmP(result, Operand::Zero()); |
| __ Ret(); |
| } |
| |
| __ bind(&in_dictionary); |
| __ LoadImmP(result, Operand(1)); |
| __ Ret(); |
| |
| __ bind(¬_in_dictionary); |
| __ LoadImmP(result, Operand::Zero()); |
| __ Ret(); |
| } |
| |
| void StoreBufferOverflowStub::GenerateFixedRegStubsAheadOfTime( |
| Isolate* isolate) { |
| StoreBufferOverflowStub stub1(isolate, kDontSaveFPRegs); |
| stub1.GetCode(); |
| // Hydrogen code stubs need stub2 at snapshot time. |
| StoreBufferOverflowStub stub2(isolate, kSaveFPRegs); |
| stub2.GetCode(); |
| } |
| |
| // Takes the input in 3 registers: address_ value_ and object_. A pointer to |
| // the value has just been written into the object, now this stub makes sure |
| // we keep the GC informed. The word in the object where the value has been |
| // written is in the address register. |
| void RecordWriteStub::Generate(MacroAssembler* masm) { |
| Label skip_to_incremental_noncompacting; |
| Label skip_to_incremental_compacting; |
| |
| // The first two branch instructions are generated with labels so as to |
| // get the offset fixed up correctly by the bind(Label*) call. We patch |
| // it back and forth between branch condition True and False |
| // when we start and stop incremental heap marking. |
| // See RecordWriteStub::Patch for details. |
| |
| // Clear the bit, branch on True for NOP action initially |
| __ b(CC_NOP, &skip_to_incremental_noncompacting); |
| __ b(CC_NOP, &skip_to_incremental_compacting); |
| |
| if (remembered_set_action() == EMIT_REMEMBERED_SET) { |
| __ RememberedSetHelper(object(), address(), value(), save_fp_regs_mode(), |
| MacroAssembler::kReturnAtEnd); |
| } |
| __ Ret(); |
| |
| __ bind(&skip_to_incremental_noncompacting); |
| GenerateIncremental(masm, INCREMENTAL); |
| |
| __ bind(&skip_to_incremental_compacting); |
| GenerateIncremental(masm, INCREMENTAL_COMPACTION); |
| |
| // Initial mode of the stub is expected to be STORE_BUFFER_ONLY. |
| // Will be checked in IncrementalMarking::ActivateGeneratedStub. |
| // patching not required on S390 as the initial path is effectively NOP |
| } |
| |
| void RecordWriteStub::GenerateIncremental(MacroAssembler* masm, Mode mode) { |
| regs_.Save(masm); |
| |
| if (remembered_set_action() == EMIT_REMEMBERED_SET) { |
| Label dont_need_remembered_set; |
| |
| __ LoadP(regs_.scratch0(), MemOperand(regs_.address(), 0)); |
| __ JumpIfNotInNewSpace(regs_.scratch0(), // Value. |
| regs_.scratch0(), &dont_need_remembered_set); |
| |
| __ JumpIfInNewSpace(regs_.object(), regs_.scratch0(), |
| &dont_need_remembered_set); |
| |
| // First notify the incremental marker if necessary, then update the |
| // remembered set. |
| CheckNeedsToInformIncrementalMarker( |
| masm, kUpdateRememberedSetOnNoNeedToInformIncrementalMarker, mode); |
| InformIncrementalMarker(masm); |
| regs_.Restore(masm); |
| __ RememberedSetHelper(object(), address(), value(), save_fp_regs_mode(), |
| MacroAssembler::kReturnAtEnd); |
| |
| __ bind(&dont_need_remembered_set); |
| } |
| |
| CheckNeedsToInformIncrementalMarker( |
| masm, kReturnOnNoNeedToInformIncrementalMarker, mode); |
| InformIncrementalMarker(masm); |
| regs_.Restore(masm); |
| __ Ret(); |
| } |
| |
| void RecordWriteStub::InformIncrementalMarker(MacroAssembler* masm) { |
| regs_.SaveCallerSaveRegisters(masm, save_fp_regs_mode()); |
| int argument_count = 3; |
| __ PrepareCallCFunction(argument_count, regs_.scratch0()); |
| Register address = |
| r2.is(regs_.address()) ? regs_.scratch0() : regs_.address(); |
| DCHECK(!address.is(regs_.object())); |
| DCHECK(!address.is(r2)); |
| __ LoadRR(address, regs_.address()); |
| __ LoadRR(r2, regs_.object()); |
| __ LoadRR(r3, address); |
| __ mov(r4, Operand(ExternalReference::isolate_address(isolate()))); |
| |
| AllowExternalCallThatCantCauseGC scope(masm); |
| __ CallCFunction( |
| ExternalReference::incremental_marking_record_write_function(isolate()), |
| argument_count); |
| regs_.RestoreCallerSaveRegisters(masm, save_fp_regs_mode()); |
| } |
| |
| void RecordWriteStub::CheckNeedsToInformIncrementalMarker( |
| MacroAssembler* masm, OnNoNeedToInformIncrementalMarker on_no_need, |
| Mode mode) { |
| Label on_black; |
| Label need_incremental; |
| Label need_incremental_pop_scratch; |
| |
| DCHECK((~Page::kPageAlignmentMask & 0xffff) == 0); |
| __ AndP(regs_.scratch0(), regs_.object(), Operand(~Page::kPageAlignmentMask)); |
| __ LoadP( |
| regs_.scratch1(), |
| MemOperand(regs_.scratch0(), MemoryChunk::kWriteBarrierCounterOffset)); |
| __ SubP(regs_.scratch1(), regs_.scratch1(), Operand(1)); |
| __ StoreP( |
| regs_.scratch1(), |
| MemOperand(regs_.scratch0(), MemoryChunk::kWriteBarrierCounterOffset)); |
| __ CmpP(regs_.scratch1(), Operand::Zero()); // S390, we could do better here |
| __ blt(&need_incremental); |
| |
| // Let's look at the color of the object: If it is not black we don't have |
| // to inform the incremental marker. |
| __ JumpIfBlack(regs_.object(), regs_.scratch0(), regs_.scratch1(), &on_black); |
| |
| regs_.Restore(masm); |
| if (on_no_need == kUpdateRememberedSetOnNoNeedToInformIncrementalMarker) { |
| __ RememberedSetHelper(object(), address(), value(), save_fp_regs_mode(), |
| MacroAssembler::kReturnAtEnd); |
| } else { |
| __ Ret(); |
| } |
| |
| __ bind(&on_black); |
| |
| // Get the value from the slot. |
| __ LoadP(regs_.scratch0(), MemOperand(regs_.address(), 0)); |
| |
| if (mode == INCREMENTAL_COMPACTION) { |
| Label ensure_not_white; |
| |
| __ CheckPageFlag(regs_.scratch0(), // Contains value. |
| regs_.scratch1(), // Scratch. |
| MemoryChunk::kEvacuationCandidateMask, eq, |
| &ensure_not_white); |
| |
| __ CheckPageFlag(regs_.object(), |
| regs_.scratch1(), // Scratch. |
| MemoryChunk::kSkipEvacuationSlotsRecordingMask, eq, |
| &need_incremental); |
| |
| __ bind(&ensure_not_white); |
| } |
| |
| // We need extra registers for this, so we push the object and the address |
| // register temporarily. |
| __ Push(regs_.object(), regs_.address()); |
| __ JumpIfWhite(regs_.scratch0(), // The value. |
| regs_.scratch1(), // Scratch. |
| regs_.object(), // Scratch. |
| regs_.address(), // Scratch. |
| &need_incremental_pop_scratch); |
| __ Pop(regs_.object(), regs_.address()); |
| |
| regs_.Restore(masm); |
| if (on_no_need == kUpdateRememberedSetOnNoNeedToInformIncrementalMarker) { |
| __ RememberedSetHelper(object(), address(), value(), save_fp_regs_mode(), |
| MacroAssembler::kReturnAtEnd); |
| } else { |
| __ Ret(); |
| } |
| |
| __ bind(&need_incremental_pop_scratch); |
| __ Pop(regs_.object(), regs_.address()); |
| |
| __ bind(&need_incremental); |
| |
| // Fall through when we need to inform the incremental marker. |
| } |
| |
| void StubFailureTrampolineStub::Generate(MacroAssembler* masm) { |
| CEntryStub ces(isolate(), 1, kSaveFPRegs); |
| __ Call(ces.GetCode(), RelocInfo::CODE_TARGET); |
| int parameter_count_offset = |
| StubFailureTrampolineFrameConstants::kArgumentsLengthOffset; |
| __ LoadP(r3, MemOperand(fp, parameter_count_offset)); |
| if (function_mode() == JS_FUNCTION_STUB_MODE) { |
| __ AddP(r3, Operand(1)); |
| } |
| masm->LeaveFrame(StackFrame::STUB_FAILURE_TRAMPOLINE); |
| __ ShiftLeftP(r3, r3, Operand(kPointerSizeLog2)); |
| __ la(sp, MemOperand(r3, sp)); |
| __ Ret(); |
| } |
| |
| void LoadICTrampolineStub::Generate(MacroAssembler* masm) { |
| __ EmitLoadTypeFeedbackVector(LoadWithVectorDescriptor::VectorRegister()); |
| LoadICStub stub(isolate()); |
| stub.GenerateForTrampoline(masm); |
| } |
| |
| void KeyedLoadICTrampolineStub::Generate(MacroAssembler* masm) { |
| __ EmitLoadTypeFeedbackVector(LoadWithVectorDescriptor::VectorRegister()); |
| KeyedLoadICStub stub(isolate()); |
| stub.GenerateForTrampoline(masm); |
| } |
| |
| void CallICTrampolineStub::Generate(MacroAssembler* masm) { |
| __ EmitLoadTypeFeedbackVector(r4); |
| CallICStub stub(isolate(), state()); |
| __ Jump(stub.GetCode(), RelocInfo::CODE_TARGET); |
| } |
| |
| void LoadICStub::Generate(MacroAssembler* masm) { GenerateImpl(masm, false); } |
| |
| void LoadICStub::GenerateForTrampoline(MacroAssembler* masm) { |
| GenerateImpl(masm, true); |
| } |
| |
| static void HandleArrayCases(MacroAssembler* masm, Register feedback, |
| Register receiver_map, Register scratch1, |
| Register scratch2, bool is_polymorphic, |
| Label* miss) { |
| // feedback initially contains the feedback array |
| Label next_loop, prepare_next; |
| Label start_polymorphic; |
| |
| Register cached_map = scratch1; |
| |
| __ LoadP(cached_map, |
| FieldMemOperand(feedback, FixedArray::OffsetOfElementAt(0))); |
| __ LoadP(cached_map, FieldMemOperand(cached_map, WeakCell::kValueOffset)); |
| __ CmpP(receiver_map, cached_map); |
| __ bne(&start_polymorphic, Label::kNear); |
| // found, now call handler. |
| Register handler = feedback; |
| __ LoadP(handler, |
| FieldMemOperand(feedback, FixedArray::OffsetOfElementAt(1))); |
| __ AddP(ip, handler, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| __ Jump(ip); |
| |
| Register length = scratch2; |
| __ bind(&start_polymorphic); |
| __ LoadP(length, FieldMemOperand(feedback, FixedArray::kLengthOffset)); |
| if (!is_polymorphic) { |
| // If the IC could be monomorphic we have to make sure we don't go past the |
| // end of the feedback array. |
| __ CmpSmiLiteral(length, Smi::FromInt(2), r0); |
| __ beq(miss); |
| } |
| |
| Register too_far = length; |
| Register pointer_reg = feedback; |
| |
| // +-----+------+------+-----+-----+ ... ----+ |
| // | map | len | wm0 | h0 | wm1 | hN | |
| // +-----+------+------+-----+-----+ ... ----+ |
| // 0 1 2 len-1 |
| // ^ ^ |
| // | | |
| // pointer_reg too_far |
| // aka feedback scratch2 |
| // also need receiver_map |
| // use cached_map (scratch1) to look in the weak map values. |
| __ SmiToPtrArrayOffset(r0, length); |
| __ AddP(too_far, feedback, r0); |
| __ AddP(too_far, Operand(FixedArray::kHeaderSize - kHeapObjectTag)); |
| __ AddP(pointer_reg, feedback, |
| Operand(FixedArray::OffsetOfElementAt(2) - kHeapObjectTag)); |
| |
| __ bind(&next_loop); |
| __ LoadP(cached_map, MemOperand(pointer_reg)); |
| __ LoadP(cached_map, FieldMemOperand(cached_map, WeakCell::kValueOffset)); |
| __ CmpP(receiver_map, cached_map); |
| __ bne(&prepare_next, Label::kNear); |
| __ LoadP(handler, MemOperand(pointer_reg, kPointerSize)); |
| __ AddP(ip, handler, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| __ Jump(ip); |
| |
| __ bind(&prepare_next); |
| __ AddP(pointer_reg, Operand(kPointerSize * 2)); |
| __ CmpP(pointer_reg, too_far); |
| __ blt(&next_loop, Label::kNear); |
| |
| // We exhausted our array of map handler pairs. |
| __ b(miss); |
| } |
| |
| static void HandleMonomorphicCase(MacroAssembler* masm, Register receiver, |
| Register receiver_map, Register feedback, |
| Register vector, Register slot, |
| Register scratch, Label* compare_map, |
| Label* load_smi_map, Label* try_array) { |
| __ JumpIfSmi(receiver, load_smi_map); |
| __ LoadP(receiver_map, FieldMemOperand(receiver, HeapObject::kMapOffset)); |
| __ bind(compare_map); |
| Register cached_map = scratch; |
| // Move the weak map into the weak_cell register. |
| __ LoadP(cached_map, FieldMemOperand(feedback, WeakCell::kValueOffset)); |
| __ CmpP(cached_map, receiver_map); |
| __ bne(try_array); |
| Register handler = feedback; |
| __ SmiToPtrArrayOffset(r1, slot); |
| __ LoadP(handler, |
| FieldMemOperand(r1, vector, FixedArray::kHeaderSize + kPointerSize)); |
| __ AddP(ip, handler, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| __ Jump(ip); |
| } |
| |
| void LoadICStub::GenerateImpl(MacroAssembler* masm, bool in_frame) { |
| Register receiver = LoadWithVectorDescriptor::ReceiverRegister(); // r3 |
| Register name = LoadWithVectorDescriptor::NameRegister(); // r4 |
| Register vector = LoadWithVectorDescriptor::VectorRegister(); // r5 |
| Register slot = LoadWithVectorDescriptor::SlotRegister(); // r2 |
| Register feedback = r6; |
| Register receiver_map = r7; |
| Register scratch1 = r8; |
| |
| __ SmiToPtrArrayOffset(r1, slot); |
| __ LoadP(feedback, FieldMemOperand(r1, vector, FixedArray::kHeaderSize)); |
| |
| // Try to quickly handle the monomorphic case without knowing for sure |
| // if we have a weak cell in feedback. We do know it's safe to look |
| // at WeakCell::kValueOffset. |
| Label try_array, load_smi_map, compare_map; |
| Label not_array, miss; |
| HandleMonomorphicCase(masm, receiver, receiver_map, feedback, vector, slot, |
| scratch1, &compare_map, &load_smi_map, &try_array); |
| |
| // Is it a fixed array? |
| __ bind(&try_array); |
| __ LoadP(scratch1, FieldMemOperand(feedback, HeapObject::kMapOffset)); |
| __ CompareRoot(scratch1, Heap::kFixedArrayMapRootIndex); |
| __ bne(¬_array, Label::kNear); |
| HandleArrayCases(masm, feedback, receiver_map, scratch1, r9, true, &miss); |
| |
| __ bind(¬_array); |
| __ CompareRoot(feedback, Heap::kmegamorphic_symbolRootIndex); |
| __ bne(&miss); |
| Code::Flags code_flags = |
| Code::RemoveHolderFromFlags(Code::ComputeHandlerFlags(Code::LOAD_IC)); |
| masm->isolate()->stub_cache()->GenerateProbe(masm, Code::LOAD_IC, code_flags, |
| receiver, name, feedback, |
| receiver_map, scratch1, r9); |
| |
| __ bind(&miss); |
| LoadIC::GenerateMiss(masm); |
| |
| __ bind(&load_smi_map); |
| __ LoadRoot(receiver_map, Heap::kHeapNumberMapRootIndex); |
| __ b(&compare_map); |
| } |
| |
| void KeyedLoadICStub::Generate(MacroAssembler* masm) { |
| GenerateImpl(masm, false); |
| } |
| |
| void KeyedLoadICStub::GenerateForTrampoline(MacroAssembler* masm) { |
| GenerateImpl(masm, true); |
| } |
| |
| void KeyedLoadICStub::GenerateImpl(MacroAssembler* masm, bool in_frame) { |
| Register receiver = LoadWithVectorDescriptor::ReceiverRegister(); // r3 |
| Register key = LoadWithVectorDescriptor::NameRegister(); // r4 |
| Register vector = LoadWithVectorDescriptor::VectorRegister(); // r5 |
| Register slot = LoadWithVectorDescriptor::SlotRegister(); // r2 |
| Register feedback = r6; |
| Register receiver_map = r7; |
| Register scratch1 = r8; |
| |
| __ SmiToPtrArrayOffset(r1, slot); |
| __ LoadP(feedback, FieldMemOperand(r1, vector, FixedArray::kHeaderSize)); |
| |
| // Try to quickly handle the monomorphic case without knowing for sure |
| // if we have a weak cell in feedback. We do know it's safe to look |
| // at WeakCell::kValueOffset. |
| Label try_array, load_smi_map, compare_map; |
| Label not_array, miss; |
| HandleMonomorphicCase(masm, receiver, receiver_map, feedback, vector, slot, |
| scratch1, &compare_map, &load_smi_map, &try_array); |
| |
| __ bind(&try_array); |
| // Is it a fixed array? |
| __ LoadP(scratch1, FieldMemOperand(feedback, HeapObject::kMapOffset)); |
| __ CompareRoot(scratch1, Heap::kFixedArrayMapRootIndex); |
| __ bne(¬_array); |
| |
| // We have a polymorphic element handler. |
| Label polymorphic, try_poly_name; |
| __ bind(&polymorphic); |
| HandleArrayCases(masm, feedback, receiver_map, scratch1, r9, true, &miss); |
| |
| __ bind(¬_array); |
| // Is it generic? |
| __ CompareRoot(feedback, Heap::kmegamorphic_symbolRootIndex); |
| __ bne(&try_poly_name); |
| Handle<Code> megamorphic_stub = |
| KeyedLoadIC::ChooseMegamorphicStub(masm->isolate(), GetExtraICState()); |
| __ Jump(megamorphic_stub, RelocInfo::CODE_TARGET); |
| |
| __ bind(&try_poly_name); |
| // We might have a name in feedback, and a fixed array in the next slot. |
| __ CmpP(key, feedback); |
| __ bne(&miss); |
| // If the name comparison succeeded, we know we have a fixed array with |
| // at least one map/handler pair. |
| __ SmiToPtrArrayOffset(r1, slot); |
| __ LoadP(feedback, |
| FieldMemOperand(r1, vector, FixedArray::kHeaderSize + kPointerSize)); |
| HandleArrayCases(masm, feedback, receiver_map, scratch1, r9, false, &miss); |
| |
| __ bind(&miss); |
| KeyedLoadIC::GenerateMiss(masm); |
| |
| __ bind(&load_smi_map); |
| __ LoadRoot(receiver_map, Heap::kHeapNumberMapRootIndex); |
| __ b(&compare_map); |
| } |
| |
| void VectorStoreICTrampolineStub::Generate(MacroAssembler* masm) { |
| __ EmitLoadTypeFeedbackVector(VectorStoreICDescriptor::VectorRegister()); |
| VectorStoreICStub stub(isolate(), state()); |
| stub.GenerateForTrampoline(masm); |
| } |
| |
| void VectorKeyedStoreICTrampolineStub::Generate(MacroAssembler* masm) { |
| __ EmitLoadTypeFeedbackVector(VectorStoreICDescriptor::VectorRegister()); |
| VectorKeyedStoreICStub stub(isolate(), state()); |
| stub.GenerateForTrampoline(masm); |
| } |
| |
| void VectorStoreICStub::Generate(MacroAssembler* masm) { |
| GenerateImpl(masm, false); |
| } |
| |
| void VectorStoreICStub::GenerateForTrampoline(MacroAssembler* masm) { |
| GenerateImpl(masm, true); |
| } |
| |
| void VectorStoreICStub::GenerateImpl(MacroAssembler* masm, bool in_frame) { |
| Register receiver = VectorStoreICDescriptor::ReceiverRegister(); // r3 |
| Register key = VectorStoreICDescriptor::NameRegister(); // r4 |
| Register vector = VectorStoreICDescriptor::VectorRegister(); // r5 |
| Register slot = VectorStoreICDescriptor::SlotRegister(); // r6 |
| DCHECK(VectorStoreICDescriptor::ValueRegister().is(r2)); // r2 |
| Register feedback = r7; |
| Register receiver_map = r8; |
| Register scratch1 = r9; |
| |
| __ SmiToPtrArrayOffset(r0, slot); |
| __ AddP(feedback, vector, r0); |
| __ LoadP(feedback, FieldMemOperand(feedback, FixedArray::kHeaderSize)); |
| |
| // Try to quickly handle the monomorphic case without knowing for sure |
| // if we have a weak cell in feedback. We do know it's safe to look |
| // at WeakCell::kValueOffset. |
| Label try_array, load_smi_map, compare_map; |
| Label not_array, miss; |
| HandleMonomorphicCase(masm, receiver, receiver_map, feedback, vector, slot, |
| scratch1, &compare_map, &load_smi_map, &try_array); |
| |
| // Is it a fixed array? |
| __ bind(&try_array); |
| __ LoadP(scratch1, FieldMemOperand(feedback, HeapObject::kMapOffset)); |
| __ CompareRoot(scratch1, Heap::kFixedArrayMapRootIndex); |
| __ bne(¬_array); |
| |
| Register scratch2 = ip; |
| HandleArrayCases(masm, feedback, receiver_map, scratch1, scratch2, true, |
| &miss); |
| |
| __ bind(¬_array); |
| __ CompareRoot(feedback, Heap::kmegamorphic_symbolRootIndex); |
| __ bne(&miss); |
| Code::Flags code_flags = |
| Code::RemoveHolderFromFlags(Code::ComputeHandlerFlags(Code::STORE_IC)); |
| masm->isolate()->stub_cache()->GenerateProbe( |
| masm, Code::STORE_IC, code_flags, receiver, key, feedback, receiver_map, |
| scratch1, scratch2); |
| |
| __ bind(&miss); |
| StoreIC::GenerateMiss(masm); |
| |
| __ bind(&load_smi_map); |
| __ LoadRoot(receiver_map, Heap::kHeapNumberMapRootIndex); |
| __ b(&compare_map); |
| } |
| |
| void VectorKeyedStoreICStub::Generate(MacroAssembler* masm) { |
| GenerateImpl(masm, false); |
| } |
| |
| void VectorKeyedStoreICStub::GenerateForTrampoline(MacroAssembler* masm) { |
| GenerateImpl(masm, true); |
| } |
| |
| static void HandlePolymorphicStoreCase(MacroAssembler* masm, Register feedback, |
| Register receiver_map, Register scratch1, |
| Register scratch2, Label* miss) { |
| // feedback initially contains the feedback array |
| Label next_loop, prepare_next; |
| Label start_polymorphic; |
| Label transition_call; |
| |
| Register cached_map = scratch1; |
| Register too_far = scratch2; |
| Register pointer_reg = feedback; |
| __ LoadP(too_far, FieldMemOperand(feedback, FixedArray::kLengthOffset)); |
| |
| // +-----+------+------+-----+-----+-----+ ... ----+ |
| // | map | len | wm0 | wt0 | h0 | wm1 | hN | |
| // +-----+------+------+-----+-----+ ----+ ... ----+ |
| // 0 1 2 len-1 |
| // ^ ^ |
| // | | |
| // pointer_reg too_far |
| // aka feedback scratch2 |
| // also need receiver_map |
| // use cached_map (scratch1) to look in the weak map values. |
| __ SmiToPtrArrayOffset(r0, too_far); |
| __ AddP(too_far, feedback, r0); |
| __ AddP(too_far, too_far, Operand(FixedArray::kHeaderSize - kHeapObjectTag)); |
| __ AddP(pointer_reg, feedback, |
| Operand(FixedArray::OffsetOfElementAt(0) - kHeapObjectTag)); |
| |
| __ bind(&next_loop); |
| __ LoadP(cached_map, MemOperand(pointer_reg)); |
| __ LoadP(cached_map, FieldMemOperand(cached_map, WeakCell::kValueOffset)); |
| __ CmpP(receiver_map, cached_map); |
| __ bne(&prepare_next); |
| // Is it a transitioning store? |
| __ LoadP(too_far, MemOperand(pointer_reg, kPointerSize)); |
| __ CompareRoot(too_far, Heap::kUndefinedValueRootIndex); |
| __ bne(&transition_call); |
| __ LoadP(pointer_reg, MemOperand(pointer_reg, kPointerSize * 2)); |
| __ AddP(ip, pointer_reg, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| __ Jump(ip); |
| |
| __ bind(&transition_call); |
| __ LoadP(too_far, FieldMemOperand(too_far, WeakCell::kValueOffset)); |
| __ JumpIfSmi(too_far, miss); |
| |
| __ LoadP(receiver_map, MemOperand(pointer_reg, kPointerSize * 2)); |
| |
| // Load the map into the correct register. |
| DCHECK(feedback.is(VectorStoreTransitionDescriptor::MapRegister())); |
| __ LoadRR(feedback, too_far); |
| |
| __ AddP(ip, receiver_map, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| __ Jump(ip); |
| |
| __ bind(&prepare_next); |
| __ AddP(pointer_reg, pointer_reg, Operand(kPointerSize * 3)); |
| __ CmpLogicalP(pointer_reg, too_far); |
| __ blt(&next_loop); |
| |
| // We exhausted our array of map handler pairs. |
| __ b(miss); |
| } |
| |
| void VectorKeyedStoreICStub::GenerateImpl(MacroAssembler* masm, bool in_frame) { |
| Register receiver = VectorStoreICDescriptor::ReceiverRegister(); // r3 |
| Register key = VectorStoreICDescriptor::NameRegister(); // r4 |
| Register vector = VectorStoreICDescriptor::VectorRegister(); // r5 |
| Register slot = VectorStoreICDescriptor::SlotRegister(); // r6 |
| DCHECK(VectorStoreICDescriptor::ValueRegister().is(r2)); // r2 |
| Register feedback = r7; |
| Register receiver_map = r8; |
| Register scratch1 = r9; |
| |
| __ SmiToPtrArrayOffset(r0, slot); |
| __ AddP(feedback, vector, r0); |
| __ LoadP(feedback, FieldMemOperand(feedback, FixedArray::kHeaderSize)); |
| |
| // Try to quickly handle the monomorphic case without knowing for sure |
| // if we have a weak cell in feedback. We do know it's safe to look |
| // at WeakCell::kValueOffset. |
| Label try_array, load_smi_map, compare_map; |
| Label not_array, miss; |
| HandleMonomorphicCase(masm, receiver, receiver_map, feedback, vector, slot, |
| scratch1, &compare_map, &load_smi_map, &try_array); |
| |
| __ bind(&try_array); |
| // Is it a fixed array? |
| __ LoadP(scratch1, FieldMemOperand(feedback, HeapObject::kMapOffset)); |
| __ CompareRoot(scratch1, Heap::kFixedArrayMapRootIndex); |
| __ bne(¬_array); |
| |
| // We have a polymorphic element handler. |
| Label polymorphic, try_poly_name; |
| __ bind(&polymorphic); |
| |
| Register scratch2 = ip; |
| |
| HandlePolymorphicStoreCase(masm, feedback, receiver_map, scratch1, scratch2, |
| &miss); |
| |
| __ bind(¬_array); |
| // Is it generic? |
| __ CompareRoot(feedback, Heap::kmegamorphic_symbolRootIndex); |
| __ bne(&try_poly_name); |
| Handle<Code> megamorphic_stub = |
| KeyedStoreIC::ChooseMegamorphicStub(masm->isolate(), GetExtraICState()); |
| __ Jump(megamorphic_stub, RelocInfo::CODE_TARGET); |
| |
| __ bind(&try_poly_name); |
| // We might have a name in feedback, and a fixed array in the next slot. |
| __ CmpP(key, feedback); |
| __ bne(&miss); |
| // If the name comparison succeeded, we know we have a fixed array with |
| // at least one map/handler pair. |
| __ SmiToPtrArrayOffset(r0, slot); |
| __ AddP(feedback, vector, r0); |
| __ LoadP(feedback, |
| FieldMemOperand(feedback, FixedArray::kHeaderSize + kPointerSize)); |
| HandleArrayCases(masm, feedback, receiver_map, scratch1, scratch2, false, |
| &miss); |
| |
| __ bind(&miss); |
| KeyedStoreIC::GenerateMiss(masm); |
| |
| __ bind(&load_smi_map); |
| __ LoadRoot(receiver_map, Heap::kHeapNumberMapRootIndex); |
| __ b(&compare_map); |
| } |
| |
| void ProfileEntryHookStub::MaybeCallEntryHook(MacroAssembler* masm) { |
| if (masm->isolate()->function_entry_hook() != NULL) { |
| PredictableCodeSizeScope predictable(masm, |
| #if V8_TARGET_ARCH_S390X |
| 40); |
| #elif V8_HOST_ARCH_S390 |
| 36); |
| #else |
| 32); |
| #endif |
| ProfileEntryHookStub stub(masm->isolate()); |
| __ CleanseP(r14); |
| __ Push(r14, ip); |
| __ CallStub(&stub); // BRASL |
| __ Pop(r14, ip); |
| } |
| } |
| |
| void ProfileEntryHookStub::Generate(MacroAssembler* masm) { |
| // The entry hook is a "push lr" instruction (LAY+ST/STG), followed by a call. |
| #if V8_TARGET_ARCH_S390X |
| const int32_t kReturnAddressDistanceFromFunctionStart = |
| Assembler::kCallTargetAddressOffset + 18; // LAY + STG * 2 |
| #elif V8_HOST_ARCH_S390 |
| const int32_t kReturnAddressDistanceFromFunctionStart = |
| Assembler::kCallTargetAddressOffset + 18; // NILH + LAY + ST * 2 |
| #else |
| const int32_t kReturnAddressDistanceFromFunctionStart = |
| Assembler::kCallTargetAddressOffset + 14; // LAY + ST * 2 |
| #endif |
| |
| // This should contain all kJSCallerSaved registers. |
| const RegList kSavedRegs = kJSCallerSaved | // Caller saved registers. |
| r7.bit(); // Saved stack pointer. |
| |
| // We also save r14+ip, so count here is one higher than the mask indicates. |
| const int32_t kNumSavedRegs = kNumJSCallerSaved + 3; |
| |
| // Save all caller-save registers as this may be called from anywhere. |
| __ CleanseP(r14); |
| __ LoadRR(ip, r14); |
| __ MultiPush(kSavedRegs | ip.bit()); |
| |
| // Compute the function's address for the first argument. |
| |
| __ SubP(r2, ip, Operand(kReturnAddressDistanceFromFunctionStart)); |
| |
| // The caller's return address is two slots above the saved temporaries. |
| // Grab that for the second argument to the hook. |
| __ lay(r3, MemOperand(sp, kNumSavedRegs * kPointerSize)); |
| |
| // Align the stack if necessary. |
| int frame_alignment = masm->ActivationFrameAlignment(); |
| if (frame_alignment > kPointerSize) { |
| __ LoadRR(r7, sp); |
| DCHECK(base::bits::IsPowerOfTwo32(frame_alignment)); |
| __ ClearRightImm(sp, sp, Operand(WhichPowerOf2(frame_alignment))); |
| } |
| |
| #if !defined(USE_SIMULATOR) |
| uintptr_t entry_hook = |
| reinterpret_cast<uintptr_t>(isolate()->function_entry_hook()); |
| __ mov(ip, Operand(entry_hook)); |
| |
| #if ABI_USES_FUNCTION_DESCRIPTORS |
| // Function descriptor |
| __ LoadP(ToRegister(ABI_TOC_REGISTER), MemOperand(ip, kPointerSize)); |
| __ LoadP(ip, MemOperand(ip, 0)); |
| // ip already set. |
| #endif |
| #endif |
| |
| // zLinux ABI requires caller's frame to have sufficient space for callee |
| // preserved regsiter save area. |
| __ LoadImmP(r0, Operand::Zero()); |
| __ lay(sp, MemOperand(sp, -kCalleeRegisterSaveAreaSize - |
| kNumRequiredStackFrameSlots * kPointerSize)); |
| __ StoreP(r0, MemOperand(sp)); |
| #if defined(USE_SIMULATOR) |
| // Under the simulator we need to indirect the entry hook through a |
| // trampoline function at a known address. |
| // It additionally takes an isolate as a third parameter |
| __ mov(r4, Operand(ExternalReference::isolate_address(isolate()))); |
| |
| ApiFunction dispatcher(FUNCTION_ADDR(EntryHookTrampoline)); |
| __ mov(ip, Operand(ExternalReference( |
| &dispatcher, ExternalReference::BUILTIN_CALL, isolate()))); |
| #endif |
| __ Call(ip); |
| |
| // zLinux ABI requires caller's frame to have sufficient space for callee |
| // preserved regsiter save area. |
| __ la(sp, MemOperand(sp, kCalleeRegisterSaveAreaSize + |
| kNumRequiredStackFrameSlots * kPointerSize)); |
| |
| // Restore the stack pointer if needed. |
| if (frame_alignment > kPointerSize) { |
| __ LoadRR(sp, r7); |
| } |
| |
| // Also pop lr to get Ret(0). |
| __ MultiPop(kSavedRegs | ip.bit()); |
| __ LoadRR(r14, ip); |
| __ Ret(); |
| } |
| |
| template <class T> |
| static void CreateArrayDispatch(MacroAssembler* masm, |
| AllocationSiteOverrideMode mode) { |
| if (mode == DISABLE_ALLOCATION_SITES) { |
| T stub(masm->isolate(), GetInitialFastElementsKind(), mode); |
| __ TailCallStub(&stub); |
| } else if (mode == DONT_OVERRIDE) { |
| int last_index = |
| GetSequenceIndexFromFastElementsKind(TERMINAL_FAST_ELEMENTS_KIND); |
| for (int i = 0; i <= last_index; ++i) { |
| ElementsKind kind = GetFastElementsKindFromSequenceIndex(i); |
| __ CmpP(r5, Operand(kind)); |
| T stub(masm->isolate(), kind); |
| __ TailCallStub(&stub, eq); |
| } |
| |
| // If we reached this point there is a problem. |
| __ Abort(kUnexpectedElementsKindInArrayConstructor); |
| } else { |
| UNREACHABLE(); |
| } |
| } |
| |
| static void CreateArrayDispatchOneArgument(MacroAssembler* masm, |
| AllocationSiteOverrideMode mode) { |
| // r4 - allocation site (if mode != DISABLE_ALLOCATION_SITES) |
| // r5 - kind (if mode != DISABLE_ALLOCATION_SITES) |
| // r2 - number of arguments |
| // r3 - constructor? |
| // sp[0] - last argument |
| Label normal_sequence; |
| if (mode == DONT_OVERRIDE) { |
| STATIC_ASSERT(FAST_SMI_ELEMENTS == 0); |
| STATIC_ASSERT(FAST_HOLEY_SMI_ELEMENTS == 1); |
| STATIC_ASSERT(FAST_ELEMENTS == 2); |
| STATIC_ASSERT(FAST_HOLEY_ELEMENTS == 3); |
| STATIC_ASSERT(FAST_DOUBLE_ELEMENTS == 4); |
| STATIC_ASSERT(FAST_HOLEY_DOUBLE_ELEMENTS == 5); |
| |
| // is the low bit set? If so, we are holey and that is good. |
| __ AndP(r0, r5, Operand(1)); |
| __ bne(&normal_sequence); |
| } |
| |
| // look at the first argument |
| __ LoadP(r7, MemOperand(sp, 0)); |
| __ CmpP(r7, Operand::Zero()); |
| __ beq(&normal_sequence); |
| |
| if (mode == DISABLE_ALLOCATION_SITES) { |
| ElementsKind initial = GetInitialFastElementsKind(); |
| ElementsKind holey_initial = GetHoleyElementsKind(initial); |
| |
| ArraySingleArgumentConstructorStub stub_holey( |
| masm->isolate(), holey_initial, DISABLE_ALLOCATION_SITES); |
| __ TailCallStub(&stub_holey); |
| |
| __ bind(&normal_sequence); |
| ArraySingleArgumentConstructorStub stub(masm->isolate(), initial, |
| DISABLE_ALLOCATION_SITES); |
| __ TailCallStub(&stub); |
| } else if (mode == DONT_OVERRIDE) { |
| // We are going to create a holey array, but our kind is non-holey. |
| // Fix kind and retry (only if we have an allocation site in the slot). |
| __ AddP(r5, r5, Operand(1)); |
| if (FLAG_debug_code) { |
| __ LoadP(r7, FieldMemOperand(r4, 0)); |
| __ CompareRoot(r7, Heap::kAllocationSiteMapRootIndex); |
| __ Assert(eq, kExpectedAllocationSite); |
| } |
| |
| // Save the resulting elements kind in type info. We can't just store r5 |
| // in the AllocationSite::transition_info field because elements kind is |
| // restricted to a portion of the field...upper bits need to be left alone. |
| STATIC_ASSERT(AllocationSite::ElementsKindBits::kShift == 0); |
| __ LoadP(r6, FieldMemOperand(r4, AllocationSite::kTransitionInfoOffset)); |
| __ AddSmiLiteral(r6, r6, Smi::FromInt(kFastElementsKindPackedToHoley), r0); |
| __ StoreP(r6, FieldMemOperand(r4, AllocationSite::kTransitionInfoOffset)); |
| |
| __ bind(&normal_sequence); |
| int last_index = |
| GetSequenceIndexFromFastElementsKind(TERMINAL_FAST_ELEMENTS_KIND); |
| for (int i = 0; i <= last_index; ++i) { |
| ElementsKind kind = GetFastElementsKindFromSequenceIndex(i); |
| __ CmpP(r5, Operand(kind)); |
| ArraySingleArgumentConstructorStub stub(masm->isolate(), kind); |
| __ TailCallStub(&stub, eq); |
| } |
| |
| // If we reached this point there is a problem. |
| __ Abort(kUnexpectedElementsKindInArrayConstructor); |
| } else { |
| UNREACHABLE(); |
| } |
| } |
| |
| template <class T> |
| static void ArrayConstructorStubAheadOfTimeHelper(Isolate* isolate) { |
| int to_index = |
| GetSequenceIndexFromFastElementsKind(TERMINAL_FAST_ELEMENTS_KIND); |
| for (int i = 0; i <= to_index; ++i) { |
| ElementsKind kind = GetFastElementsKindFromSequenceIndex(i); |
| T stub(isolate, kind); |
| stub.GetCode(); |
| if (AllocationSite::GetMode(kind) != DONT_TRACK_ALLOCATION_SITE) { |
| T stub1(isolate, kind, DISABLE_ALLOCATION_SITES); |
| stub1.GetCode(); |
| } |
| } |
| } |
| |
| void CommonArrayConstructorStub::GenerateStubsAheadOfTime(Isolate* isolate) { |
| ArrayConstructorStubAheadOfTimeHelper<ArrayNoArgumentConstructorStub>( |
| isolate); |
| ArrayNArgumentsConstructorStub stub(isolate); |
| stub.GetCode(); |
| ElementsKind kinds[2] = {FAST_ELEMENTS, FAST_HOLEY_ELEMENTS}; |
| for (int i = 0; i < 2; i++) { |
| // For internal arrays we only need a few things |
| InternalArrayNoArgumentConstructorStub stubh1(isolate, kinds[i]); |
| stubh1.GetCode(); |
| InternalArraySingleArgumentConstructorStub stubh2(isolate, kinds[i]); |
| stubh2.GetCode(); |
| } |
| } |
| |
| void ArrayConstructorStub::GenerateDispatchToArrayStub( |
| MacroAssembler* masm, AllocationSiteOverrideMode mode) { |
| if (argument_count() == ANY) { |
| Label not_zero_case, not_one_case; |
| __ CmpP(r2, Operand::Zero()); |
| __ bne(¬_zero_case); |
| CreateArrayDispatch<ArrayNoArgumentConstructorStub>(masm, mode); |
| |
| __ bind(¬_zero_case); |
| __ CmpP(r2, Operand(1)); |
| __ bgt(¬_one_case); |
| CreateArrayDispatchOneArgument(masm, mode); |
| |
| __ bind(¬_one_case); |
| ArrayNArgumentsConstructorStub stub(masm->isolate()); |
| __ TailCallStub(&stub); |
| } else if (argument_count() == NONE) { |
| CreateArrayDispatch<ArrayNoArgumentConstructorStub>(masm, mode); |
| } else if (argument_count() == ONE) { |
| CreateArrayDispatchOneArgument(masm, mode); |
| } else if (argument_count() == MORE_THAN_ONE) { |
| ArrayNArgumentsConstructorStub stub(masm->isolate()); |
| __ TailCallStub(&stub); |
| } else { |
| UNREACHABLE(); |
| } |
| } |
| |
| void ArrayConstructorStub::Generate(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- r2 : argc (only if argument_count() == ANY) |
| // -- r3 : constructor |
| // -- r4 : AllocationSite or undefined |
| // -- r5 : new target |
| // -- sp[0] : return address |
| // -- sp[4] : last argument |
| // ----------------------------------- |
| |
| if (FLAG_debug_code) { |
| // The array construct code is only set for the global and natives |
| // builtin Array functions which always have maps. |
| |
| // Initial map for the builtin Array function should be a map. |
| __ LoadP(r6, FieldMemOperand(r3, JSFunction::kPrototypeOrInitialMapOffset)); |
| // Will both indicate a NULL and a Smi. |
| __ TestIfSmi(r6); |
| __ Assert(ne, kUnexpectedInitialMapForArrayFunction, cr0); |
| __ CompareObjectType(r6, r6, r7, MAP_TYPE); |
| __ Assert(eq, kUnexpectedInitialMapForArrayFunction); |
| |
| // We should either have undefined in r4 or a valid AllocationSite |
| __ AssertUndefinedOrAllocationSite(r4, r6); |
| } |
| |
| // Enter the context of the Array function. |
| __ LoadP(cp, FieldMemOperand(r3, JSFunction::kContextOffset)); |
| |
| Label subclassing; |
| __ CmpP(r5, r3); |
| __ bne(&subclassing, Label::kNear); |
| |
| Label no_info; |
| // Get the elements kind and case on that. |
| __ CompareRoot(r4, Heap::kUndefinedValueRootIndex); |
| __ beq(&no_info); |
| |
| __ LoadP(r5, FieldMemOperand(r4, AllocationSite::kTransitionInfoOffset)); |
| __ SmiUntag(r5); |
| STATIC_ASSERT(AllocationSite::ElementsKindBits::kShift == 0); |
| __ AndP(r5, Operand(AllocationSite::ElementsKindBits::kMask)); |
| GenerateDispatchToArrayStub(masm, DONT_OVERRIDE); |
| |
| __ bind(&no_info); |
| GenerateDispatchToArrayStub(masm, DISABLE_ALLOCATION_SITES); |
| |
| __ bind(&subclassing); |
| switch (argument_count()) { |
| case ANY: |
| case MORE_THAN_ONE: |
| __ ShiftLeftP(r1, r2, Operand(kPointerSizeLog2)); |
| __ StoreP(r3, MemOperand(sp, r1)); |
| __ AddP(r2, r2, Operand(3)); |
| break; |
| case NONE: |
| __ StoreP(r3, MemOperand(sp, 0 * kPointerSize)); |
| __ LoadImmP(r2, Operand(3)); |
| break; |
| case ONE: |
| __ StoreP(r3, MemOperand(sp, 1 * kPointerSize)); |
| __ LoadImmP(r2, Operand(4)); |
| break; |
| } |
| |
| __ Push(r5, r4); |
| __ JumpToExternalReference(ExternalReference(Runtime::kNewArray, isolate())); |
| } |
| |
| void InternalArrayConstructorStub::GenerateCase(MacroAssembler* masm, |
| ElementsKind kind) { |
| __ CmpLogicalP(r2, Operand(1)); |
| |
| InternalArrayNoArgumentConstructorStub stub0(isolate(), kind); |
| __ TailCallStub(&stub0, lt); |
| |
| ArrayNArgumentsConstructorStub stubN(isolate()); |
| __ TailCallStub(&stubN, gt); |
| |
| if (IsFastPackedElementsKind(kind)) { |
| // We might need to create a holey array |
| // look at the first argument |
| __ LoadP(r5, MemOperand(sp, 0)); |
| __ CmpP(r5, Operand::Zero()); |
| |
| InternalArraySingleArgumentConstructorStub stub1_holey( |
| isolate(), GetHoleyElementsKind(kind)); |
| __ TailCallStub(&stub1_holey, ne); |
| } |
| |
| InternalArraySingleArgumentConstructorStub stub1(isolate(), kind); |
| __ TailCallStub(&stub1); |
| } |
| |
| void InternalArrayConstructorStub::Generate(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- r2 : argc |
| // -- r3 : constructor |
| // -- sp[0] : return address |
| // -- sp[4] : last argument |
| // ----------------------------------- |
| |
| if (FLAG_debug_code) { |
| // The array construct code is only set for the global and natives |
| // builtin Array functions which always have maps. |
| |
| // Initial map for the builtin Array function should be a map. |
| __ LoadP(r5, FieldMemOperand(r3, JSFunction::kPrototypeOrInitialMapOffset)); |
| // Will both indicate a NULL and a Smi. |
| __ TestIfSmi(r5); |
| __ Assert(ne, kUnexpectedInitialMapForArrayFunction, cr0); |
| __ CompareObjectType(r5, r5, r6, MAP_TYPE); |
| __ Assert(eq, kUnexpectedInitialMapForArrayFunction); |
| } |
| |
| // Figure out the right elements kind |
| __ LoadP(r5, FieldMemOperand(r3, JSFunction::kPrototypeOrInitialMapOffset)); |
| // Load the map's "bit field 2" into |result|. |
| __ LoadlB(r5, FieldMemOperand(r5, Map::kBitField2Offset)); |
| // Retrieve elements_kind from bit field 2. |
| __ DecodeField<Map::ElementsKindBits>(r5); |
| |
| if (FLAG_debug_code) { |
| Label done; |
| __ CmpP(r5, Operand(FAST_ELEMENTS)); |
| __ beq(&done); |
| __ CmpP(r5, Operand(FAST_HOLEY_ELEMENTS)); |
| __ Assert(eq, kInvalidElementsKindForInternalArrayOrInternalPackedArray); |
| __ bind(&done); |
| } |
| |
| Label fast_elements_case; |
| __ CmpP(r5, Operand(FAST_ELEMENTS)); |
| __ beq(&fast_elements_case); |
| GenerateCase(masm, FAST_HOLEY_ELEMENTS); |
| |
| __ bind(&fast_elements_case); |
| GenerateCase(masm, FAST_ELEMENTS); |
| } |
| |
| void FastNewObjectStub::Generate(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- r3 : target |
| // -- r5 : new target |
| // -- cp : context |
| // -- lr : return address |
| // ----------------------------------- |
| __ AssertFunction(r3); |
| __ AssertReceiver(r5); |
| |
| // Verify that the new target is a JSFunction. |
| Label new_object; |
| __ CompareObjectType(r5, r4, r4, JS_FUNCTION_TYPE); |
| __ bne(&new_object); |
| |
| // Load the initial map and verify that it's in fact a map. |
| __ LoadP(r4, FieldMemOperand(r5, JSFunction::kPrototypeOrInitialMapOffset)); |
| __ JumpIfSmi(r4, &new_object); |
| __ CompareObjectType(r4, r2, r2, MAP_TYPE); |
| __ bne(&new_object); |
| |
| // Fall back to runtime if the target differs from the new target's |
| // initial map constructor. |
| __ LoadP(r2, FieldMemOperand(r4, Map::kConstructorOrBackPointerOffset)); |
| __ CmpP(r2, r3); |
| __ bne(&new_object); |
| |
| // Allocate the JSObject on the heap. |
| Label allocate, done_allocate; |
| __ LoadlB(r6, FieldMemOperand(r4, Map::kInstanceSizeOffset)); |
| __ Allocate(r6, r2, r7, r8, &allocate, SIZE_IN_WORDS); |
| __ bind(&done_allocate); |
| |
| // Initialize the JSObject fields. |
| __ StoreP(r4, FieldMemOperand(r2, JSObject::kMapOffset)); |
| __ LoadRoot(r5, Heap::kEmptyFixedArrayRootIndex); |
| __ StoreP(r5, FieldMemOperand(r2, JSObject::kPropertiesOffset)); |
| __ StoreP(r5, FieldMemOperand(r2, JSObject::kElementsOffset)); |
| STATIC_ASSERT(JSObject::kHeaderSize == 3 * kPointerSize); |
| __ AddP(r3, r2, Operand(JSObject::kHeaderSize - kHeapObjectTag)); |
| |
| // ----------- S t a t e ------------- |
| // -- r2 : result (tagged) |
| // -- r3 : result fields (untagged) |
| // -- r7 : result end (untagged) |
| // -- r4 : initial map |
| // -- cp : context |
| // -- lr : return address |
| // ----------------------------------- |
| |
| // Perform in-object slack tracking if requested. |
| Label slack_tracking; |
| STATIC_ASSERT(Map::kNoSlackTracking == 0); |
| __ LoadRoot(r8, Heap::kUndefinedValueRootIndex); |
| __ LoadlW(r5, FieldMemOperand(r4, Map::kBitField3Offset)); |
| __ DecodeField<Map::ConstructionCounter>(r9, r5); |
| __ LoadAndTestP(r9, r9); |
| __ bne(&slack_tracking); |
| { |
| // Initialize all in-object fields with undefined. |
| __ InitializeFieldsWithFiller(r3, r7, r8); |
| |
| __ Ret(); |
| } |
| __ bind(&slack_tracking); |
| { |
| // Decrease generous allocation count. |
| STATIC_ASSERT(Map::ConstructionCounter::kNext == 32); |
| __ Add32(r5, r5, Operand(-(1 << Map::ConstructionCounter::kShift))); |
| __ StoreW(r5, FieldMemOperand(r4, Map::kBitField3Offset)); |
| |
| // Initialize the in-object fields with undefined. |
| __ LoadlB(r6, FieldMemOperand(r4, Map::kUnusedPropertyFieldsOffset)); |
| __ ShiftLeftP(r6, r6, Operand(kPointerSizeLog2)); |
| __ SubP(r6, r7, r6); |
| __ InitializeFieldsWithFiller(r3, r6, r8); |
| |
| // Initialize the remaining (reserved) fields with one pointer filler map. |
| __ LoadRoot(r8, Heap::kOnePointerFillerMapRootIndex); |
| __ InitializeFieldsWithFiller(r3, r7, r8); |
| |
| // Check if we can finalize the instance size. |
| __ CmpP(r9, Operand(Map::kSlackTrackingCounterEnd)); |
| __ Ret(ne); |
| |
| // Finalize the instance size. |
| { |
| FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL); |
| __ Push(r2, r4); |
| __ CallRuntime(Runtime::kFinalizeInstanceSize); |
| __ Pop(r2); |
| } |
| __ Ret(); |
| } |
| |
| // Fall back to %AllocateInNewSpace. |
| __ bind(&allocate); |
| { |
| FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL); |
| STATIC_ASSERT(kSmiTag == 0); |
| __ ShiftLeftP(r6, r6, |
| Operand(kPointerSizeLog2 + kSmiTagSize + kSmiShiftSize)); |
| __ Push(r4, r6); |
| __ CallRuntime(Runtime::kAllocateInNewSpace); |
| __ Pop(r4); |
| } |
| __ LoadlB(r7, FieldMemOperand(r4, Map::kInstanceSizeOffset)); |
| __ ShiftLeftP(r7, r7, Operand(kPointerSizeLog2)); |
| __ AddP(r7, r2, r7); |
| __ SubP(r7, r7, Operand(kHeapObjectTag)); |
| __ b(&done_allocate); |
| |
| // Fall back to %NewObject. |
| __ bind(&new_object); |
| __ Push(r3, r5); |
| __ TailCallRuntime(Runtime::kNewObject); |
| } |
| |
| void FastNewRestParameterStub::Generate(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- r3 : function |
| // -- cp : context |
| // -- fp : frame pointer |
| // -- lr : return address |
| // ----------------------------------- |
| __ AssertFunction(r3); |
| |
| // Make r4 point to the JavaScript frame. |
| __ LoadRR(r4, fp); |
| if (skip_stub_frame()) { |
| // For Ignition we need to skip the handler/stub frame to reach the |
| // JavaScript frame for the function. |
| __ LoadP(r4, MemOperand(r4, StandardFrameConstants::kCallerFPOffset)); |
| } |
| if (FLAG_debug_code) { |
| Label ok; |
| __ LoadP(ip, MemOperand(r4, StandardFrameConstants::kFunctionOffset)); |
| __ CmpP(ip, r3); |
| __ b(&ok, Label::kNear); |
| __ Abort(kInvalidFrameForFastNewRestArgumentsStub); |
| __ bind(&ok); |
| } |
| |
| // Check if we have rest parameters (only possible if we have an |
| // arguments adaptor frame below the function frame). |
| Label no_rest_parameters; |
| __ LoadP(r4, MemOperand(r4, StandardFrameConstants::kCallerFPOffset)); |
| __ LoadP(ip, MemOperand(r4, CommonFrameConstants::kContextOrFrameTypeOffset)); |
| __ CmpSmiLiteral(ip, Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR), r0); |
| __ bne(&no_rest_parameters); |
| |
| // Check if the arguments adaptor frame contains more arguments than |
| // specified by the function's internal formal parameter count. |
| Label rest_parameters; |
| __ LoadP(r2, MemOperand(r4, ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| __ LoadP(r5, FieldMemOperand(r3, JSFunction::kSharedFunctionInfoOffset)); |
| __ LoadW( |
| r5, FieldMemOperand(r5, SharedFunctionInfo::kFormalParameterCountOffset)); |
| #if V8_TARGET_ARCH_S390X |
| __ SmiTag(r5); |
| #endif |
| __ SubP(r2, r2, r5); |
| __ bgt(&rest_parameters); |
| |
| // Return an empty rest parameter array. |
| __ bind(&no_rest_parameters); |
| { |
| // ----------- S t a t e ------------- |
| // -- cp : context |
| // -- lr : return address |
| // ----------------------------------- |
| |
| // Allocate an empty rest parameter array. |
| Label allocate, done_allocate; |
| __ Allocate(JSArray::kSize, r2, r3, r4, &allocate, NO_ALLOCATION_FLAGS); |
| __ bind(&done_allocate); |
| |
| // Setup the rest parameter array in r0. |
| __ LoadNativeContextSlot(Context::JS_ARRAY_FAST_ELEMENTS_MAP_INDEX, r3); |
| __ StoreP(r3, FieldMemOperand(r2, JSArray::kMapOffset), r0); |
| __ LoadRoot(r3, Heap::kEmptyFixedArrayRootIndex); |
| __ StoreP(r3, FieldMemOperand(r2, JSArray::kPropertiesOffset), r0); |
| __ StoreP(r3, FieldMemOperand(r2, JSArray::kElementsOffset), r0); |
| __ LoadImmP(r3, Operand::Zero()); |
| __ StoreP(r3, FieldMemOperand(r2, JSArray::kLengthOffset), r0); |
| STATIC_ASSERT(JSArray::kSize == 4 * kPointerSize); |
| __ Ret(); |
| |
| // Fall back to %AllocateInNewSpace. |
| __ bind(&allocate); |
| { |
| FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL); |
| __ Push(Smi::FromInt(JSArray::kSize)); |
| __ CallRuntime(Runtime::kAllocateInNewSpace); |
| } |
| __ b(&done_allocate); |
| } |
| |
| __ bind(&rest_parameters); |
| { |
| // Compute the pointer to the first rest parameter (skippping the receiver). |
| __ SmiToPtrArrayOffset(r8, r2); |
| __ AddP(r4, r4, r8); |
| __ AddP(r4, r4, Operand(StandardFrameConstants::kCallerSPOffset)); |
| |
| // ----------- S t a t e ------------- |
| // -- cp : context |
| // -- r2 : number of rest parameters (tagged) |
| // -- r3 : function |
| // -- r4 : pointer just past first rest parameters |
| // -- r8 : size of rest parameters |
| // -- lr : return address |
| // ----------------------------------- |
| |
| // Allocate space for the rest parameter array plus the backing store. |
| Label allocate, done_allocate; |
| __ mov(r9, Operand(JSArray::kSize + FixedArray::kHeaderSize)); |
| __ AddP(r9, r9, r8); |
| __ Allocate(r9, r5, r6, r7, &allocate, NO_ALLOCATION_FLAGS); |
| __ bind(&done_allocate); |
| |
| // Setup the elements array in r5. |
| __ LoadRoot(r3, Heap::kFixedArrayMapRootIndex); |
| __ StoreP(r3, FieldMemOperand(r5, FixedArray::kMapOffset), r0); |
| __ StoreP(r2, FieldMemOperand(r5, FixedArray::kLengthOffset), r0); |
| __ AddP(r6, r5, |
| Operand(FixedArray::kHeaderSize - kHeapObjectTag - kPointerSize)); |
| { |
| Label loop; |
| __ SmiUntag(r1, r2); |
| // __ mtctr(r0); |
| __ bind(&loop); |
| __ lay(r4, MemOperand(r4, -kPointerSize)); |
| __ LoadP(ip, MemOperand(r4)); |
| __ la(r6, MemOperand(r6, kPointerSize)); |
| __ StoreP(ip, MemOperand(r6)); |
| // __ bdnz(&loop); |
| __ BranchOnCount(r1, &loop); |
| __ AddP(r6, r6, Operand(kPointerSize)); |
| } |
| |
| // Setup the rest parameter array in r6. |
| __ LoadNativeContextSlot(Context::JS_ARRAY_FAST_ELEMENTS_MAP_INDEX, r3); |
| __ StoreP(r3, MemOperand(r6, JSArray::kMapOffset)); |
| __ LoadRoot(r3, Heap::kEmptyFixedArrayRootIndex); |
| __ StoreP(r3, MemOperand(r6, JSArray::kPropertiesOffset)); |
| __ StoreP(r5, MemOperand(r6, JSArray::kElementsOffset)); |
| __ StoreP(r2, MemOperand(r6, JSArray::kLengthOffset)); |
| STATIC_ASSERT(JSArray::kSize == 4 * kPointerSize); |
| __ AddP(r2, r6, Operand(kHeapObjectTag)); |
| __ Ret(); |
| |
| // Fall back to %AllocateInNewSpace (if not too big). |
| Label too_big_for_new_space; |
| __ bind(&allocate); |
| __ CmpP(r9, Operand(Page::kMaxRegularHeapObjectSize)); |
| __ bgt(&too_big_for_new_space); |
| { |
| FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL); |
| __ SmiTag(r9); |
| __ Push(r2, r4, r9); |
| __ CallRuntime(Runtime::kAllocateInNewSpace); |
| __ LoadRR(r5, r2); |
| __ Pop(r2, r4); |
| } |
| __ b(&done_allocate); |
| |
| // Fall back to %NewRestParameter. |
| __ bind(&too_big_for_new_space); |
| __ push(r3); |
| __ TailCallRuntime(Runtime::kNewRestParameter); |
| } |
| } |
| |
| void FastNewSloppyArgumentsStub::Generate(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- r3 : function |
| // -- cp : context |
| // -- fp : frame pointer |
| // -- lr : return address |
| // ----------------------------------- |
| __ AssertFunction(r3); |
| |
| // Make r9 point to the JavaScript frame. |
| __ LoadRR(r9, fp); |
| if (skip_stub_frame()) { |
| // For Ignition we need to skip the handler/stub frame to reach the |
| // JavaScript frame for the function. |
| __ LoadP(r9, MemOperand(r9, StandardFrameConstants::kCallerFPOffset)); |
| } |
| if (FLAG_debug_code) { |
| Label ok; |
| __ LoadP(ip, MemOperand(r9, StandardFrameConstants::kFunctionOffset)); |
| __ CmpP(ip, r3); |
| __ beq(&ok, Label::kNear); |
| __ Abort(kInvalidFrameForFastNewRestArgumentsStub); |
| __ bind(&ok); |
| } |
| |
| // TODO(bmeurer): Cleanup to match the FastNewStrictArgumentsStub. |
| __ LoadP(r4, FieldMemOperand(r3, JSFunction::kSharedFunctionInfoOffset)); |
| __ LoadW( |
| r4, FieldMemOperand(r4, SharedFunctionInfo::kFormalParameterCountOffset)); |
| #if V8_TARGET_ARCH_S390X |
| __ SmiTag(r4); |
| #endif |
| __ SmiToPtrArrayOffset(r5, r4); |
| __ AddP(r5, r9, r5); |
| __ AddP(r5, r5, Operand(StandardFrameConstants::kCallerSPOffset)); |
| |
| // r3 : function |
| // r4 : number of parameters (tagged) |
| // r5 : parameters pointer |
| // r9 : JavaScript frame pointer |
| // Registers used over whole function: |
| // r7 : arguments count (tagged) |
| // r8 : mapped parameter count (tagged) |
| |
| // Check if the calling frame is an arguments adaptor frame. |
| Label adaptor_frame, try_allocate, runtime; |
| __ LoadP(r6, MemOperand(r9, StandardFrameConstants::kCallerFPOffset)); |
| __ LoadP(r2, MemOperand(r6, CommonFrameConstants::kContextOrFrameTypeOffset)); |
| __ CmpSmiLiteral(r2, Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR), r0); |
| __ beq(&adaptor_frame); |
| |
| // No adaptor, parameter count = argument count. |
| __ LoadRR(r7, r4); |
| __ LoadRR(r8, r4); |
| __ b(&try_allocate); |
| |
| // We have an adaptor frame. Patch the parameters pointer. |
| __ bind(&adaptor_frame); |
| __ LoadP(r7, MemOperand(r6, ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| __ SmiToPtrArrayOffset(r5, r7); |
| __ AddP(r5, r5, r6); |
| __ AddP(r5, r5, Operand(StandardFrameConstants::kCallerSPOffset)); |
| |
| // r7 = argument count (tagged) |
| // r8 = parameter count (tagged) |
| // Compute the mapped parameter count = min(r4, r7) in r8. |
| __ CmpP(r4, r7); |
| Label skip; |
| __ LoadRR(r8, r4); |
| __ blt(&skip); |
| __ LoadRR(r8, r7); |
| __ bind(&skip); |
| |
| __ bind(&try_allocate); |
| |
| // Compute the sizes of backing store, parameter map, and arguments object. |
| // 1. Parameter map, has 2 extra words containing context and backing store. |
| const int kParameterMapHeaderSize = |
| FixedArray::kHeaderSize + 2 * kPointerSize; |
| // If there are no mapped parameters, we do not need the parameter_map. |
| __ CmpSmiLiteral(r8, Smi::FromInt(0), r0); |
| Label skip2, skip3; |
| __ bne(&skip2); |
| __ LoadImmP(r1, Operand::Zero()); |
| __ b(&skip3); |
| __ bind(&skip2); |
| __ SmiToPtrArrayOffset(r1, r8); |
| __ AddP(r1, r1, Operand(kParameterMapHeaderSize)); |
| __ bind(&skip3); |
| |
| // 2. Backing store. |
| __ SmiToPtrArrayOffset(r6, r7); |
| __ AddP(r1, r1, r6); |
| __ AddP(r1, r1, Operand(FixedArray::kHeaderSize)); |
| |
| // 3. Arguments object. |
| __ AddP(r1, r1, Operand(JSSloppyArgumentsObject::kSize)); |
| |
| // Do the allocation of all three objects in one go. |
| __ Allocate(r1, r2, r1, r6, &runtime, NO_ALLOCATION_FLAGS); |
| |
| // r2 = address of new object(s) (tagged) |
| // r4 = argument count (smi-tagged) |
| // Get the arguments boilerplate from the current native context into r3. |
| const int kNormalOffset = |
| Context::SlotOffset(Context::SLOPPY_ARGUMENTS_MAP_INDEX); |
| const int kAliasedOffset = |
| Context::SlotOffset(Context::FAST_ALIASED_ARGUMENTS_MAP_INDEX); |
| |
| __ LoadP(r6, NativeContextMemOperand()); |
| __ CmpP(r8, Operand::Zero()); |
| Label skip4, skip5; |
| __ bne(&skip4); |
| __ LoadP(r6, MemOperand(r6, kNormalOffset)); |
| __ b(&skip5); |
| __ bind(&skip4); |
| __ LoadP(r6, MemOperand(r6, kAliasedOffset)); |
| __ bind(&skip5); |
| |
| // r2 = address of new object (tagged) |
| // r4 = argument count (smi-tagged) |
| // r6 = address of arguments map (tagged) |
| // r8 = mapped parameter count (tagged) |
| __ StoreP(r6, FieldMemOperand(r2, JSObject::kMapOffset), r0); |
| __ LoadRoot(r1, Heap::kEmptyFixedArrayRootIndex); |
| __ StoreP(r1, FieldMemOperand(r2, JSObject::kPropertiesOffset), r0); |
| __ StoreP(r1, FieldMemOperand(r2, JSObject::kElementsOffset), r0); |
| |
| // Set up the callee in-object property. |
| __ AssertNotSmi(r3); |
| __ StoreP(r3, FieldMemOperand(r2, JSSloppyArgumentsObject::kCalleeOffset), |
| r0); |
| |
| // Use the length (smi tagged) and set that as an in-object property too. |
| __ AssertSmi(r7); |
| __ StoreP(r7, FieldMemOperand(r2, JSSloppyArgumentsObject::kLengthOffset), |
| r0); |
| |
| // Set up the elements pointer in the allocated arguments object. |
| // If we allocated a parameter map, r6 will point there, otherwise |
| // it will point to the backing store. |
| __ AddP(r6, r2, Operand(JSSloppyArgumentsObject::kSize)); |
| __ StoreP(r6, FieldMemOperand(r2, JSObject::kElementsOffset), r0); |
| |
| // r2 = address of new object (tagged) |
| // r4 = argument count (tagged) |
| // r6 = address of parameter map or backing store (tagged) |
| // r8 = mapped parameter count (tagged) |
| // Initialize parameter map. If there are no mapped arguments, we're done. |
| Label skip_parameter_map; |
| __ CmpSmiLiteral(r8, Smi::FromInt(0), r0); |
| Label skip6; |
| __ bne(&skip6); |
| // Move backing store address to r3, because it is |
| // expected there when filling in the unmapped arguments. |
| __ LoadRR(r3, r6); |
| __ b(&skip_parameter_map); |
| __ bind(&skip6); |
| |
| __ LoadRoot(r7, Heap::kSloppyArgumentsElementsMapRootIndex); |
| __ StoreP(r7, FieldMemOperand(r6, FixedArray::kMapOffset), r0); |
| __ AddSmiLiteral(r7, r8, Smi::FromInt(2), r0); |
| __ StoreP(r7, FieldMemOperand(r6, FixedArray::kLengthOffset), r0); |
| __ StoreP(cp, FieldMemOperand(r6, FixedArray::kHeaderSize + 0 * kPointerSize), |
| r0); |
| __ SmiToPtrArrayOffset(r7, r8); |
| __ AddP(r7, r7, r6); |
| __ AddP(r7, r7, Operand(kParameterMapHeaderSize)); |
| __ StoreP(r7, FieldMemOperand(r6, FixedArray::kHeaderSize + 1 * kPointerSize), |
| r0); |
| |
| // Copy the parameter slots and the holes in the arguments. |
| // We need to fill in mapped_parameter_count slots. They index the context, |
| // where parameters are stored in reverse order, at |
| // MIN_CONTEXT_SLOTS .. MIN_CONTEXT_SLOTS+parameter_count-1 |
| // The mapped parameter thus need to get indices |
| // MIN_CONTEXT_SLOTS+parameter_count-1 .. |
| // MIN_CONTEXT_SLOTS+parameter_count-mapped_parameter_count |
| // We loop from right to left. |
| Label parameters_loop; |
| __ LoadRR(r7, r8); |
| __ AddSmiLiteral(r1, r4, Smi::FromInt(Context::MIN_CONTEXT_SLOTS), r0); |
| __ SubP(r1, r1, r8); |
| __ LoadRoot(ip, Heap::kTheHoleValueRootIndex); |
| __ SmiToPtrArrayOffset(r3, r7); |
| __ AddP(r3, r3, r6); |
| __ AddP(r3, r3, Operand(kParameterMapHeaderSize)); |
| |
| // r3 = address of backing store (tagged) |
| // r6 = address of parameter map (tagged) |
| // r7 = temporary scratch (a.o., for address calculation) |
| // r9 = temporary scratch (a.o., for address calculation) |
| // ip = the hole value |
| __ SmiUntag(r7); |
| __ push(r4); |
| __ LoadRR(r4, r7); |
| __ ShiftLeftP(r7, r7, Operand(kPointerSizeLog2)); |
| __ AddP(r9, r3, r7); |
| __ AddP(r7, r6, r7); |
| __ AddP(r9, r9, Operand(FixedArray::kHeaderSize - kHeapObjectTag)); |
| __ AddP(r7, r7, Operand(kParameterMapHeaderSize - kHeapObjectTag)); |
| |
| __ bind(¶meters_loop); |
| __ StoreP(r1, MemOperand(r7, -kPointerSize)); |
| __ lay(r7, MemOperand(r7, -kPointerSize)); |
| __ StoreP(ip, MemOperand(r9, -kPointerSize)); |
| __ lay(r9, MemOperand(r9, -kPointerSize)); |
| __ AddSmiLiteral(r1, r1, Smi::FromInt(1), r0); |
| __ BranchOnCount(r4, ¶meters_loop); |
| __ pop(r4); |
| |
| // Restore r7 = argument count (tagged). |
| __ LoadP(r7, FieldMemOperand(r2, JSSloppyArgumentsObject::kLengthOffset)); |
| |
| __ bind(&skip_parameter_map); |
| // r2 = address of new object (tagged) |
| // r3 = address of backing store (tagged) |
| // r7 = argument count (tagged) |
| // r8 = mapped parameter count (tagged) |
| // r1 = scratch |
| // Copy arguments header and remaining slots (if there are any). |
| __ LoadRoot(r1, Heap::kFixedArrayMapRootIndex); |
| __ StoreP(r1, FieldMemOperand(r3, FixedArray::kMapOffset), r0); |
| __ StoreP(r7, FieldMemOperand(r3, FixedArray::kLengthOffset), r0); |
| __ SubP(r1, r7, r8); |
| __ Ret(eq); |
| |
| Label arguments_loop; |
| __ SmiUntag(r1); |
| __ LoadRR(r4, r1); |
| |
| __ SmiToPtrArrayOffset(r0, r8); |
| __ SubP(r5, r5, r0); |
| __ AddP(r1, r3, r0); |
| __ AddP(r1, r1, |
| Operand(FixedArray::kHeaderSize - kHeapObjectTag - kPointerSize)); |
| |
| __ bind(&arguments_loop); |
| __ LoadP(r6, MemOperand(r5, -kPointerSize)); |
| __ lay(r5, MemOperand(r5, -kPointerSize)); |
| __ StoreP(r6, MemOperand(r1, kPointerSize)); |
| __ la(r1, MemOperand(r1, kPointerSize)); |
| __ BranchOnCount(r4, &arguments_loop); |
| |
| // Return. |
| __ Ret(); |
| |
| // Do the runtime call to allocate the arguments object. |
| // r7 = argument count (tagged) |
| __ bind(&runtime); |
| __ Push(r3, r5, r7); |
| __ TailCallRuntime(Runtime::kNewSloppyArguments); |
| } |
| |
| void FastNewStrictArgumentsStub::Generate(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- r3 : function |
| // -- cp : context |
| // -- fp : frame pointer |
| // -- lr : return address |
| // ----------------------------------- |
| __ AssertFunction(r3); |
| |
| // Make r4 point to the JavaScript frame. |
| __ LoadRR(r4, fp); |
| if (skip_stub_frame()) { |
| // For Ignition we need to skip the handler/stub frame to reach the |
| // JavaScript frame for the function. |
| __ LoadP(r4, MemOperand(r4, StandardFrameConstants::kCallerFPOffset)); |
| } |
| if (FLAG_debug_code) { |
| Label ok; |
| __ LoadP(ip, MemOperand(r4, StandardFrameConstants::kFunctionOffset)); |
| __ CmpP(ip, r3); |
| __ beq(&ok, Label::kNear); |
| __ Abort(kInvalidFrameForFastNewRestArgumentsStub); |
| __ bind(&ok); |
| } |
| |
| // Check if we have an arguments adaptor frame below the function frame. |
| Label arguments_adaptor, arguments_done; |
| __ LoadP(r5, MemOperand(r4, StandardFrameConstants::kCallerFPOffset)); |
| __ LoadP(ip, MemOperand(r5, CommonFrameConstants::kContextOrFrameTypeOffset)); |
| __ CmpSmiLiteral(ip, Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR), r0); |
| __ beq(&arguments_adaptor); |
| { |
| __ LoadP(r6, FieldMemOperand(r3, JSFunction::kSharedFunctionInfoOffset)); |
| __ LoadW(r2, FieldMemOperand( |
| r6, SharedFunctionInfo::kFormalParameterCountOffset)); |
| #if V8_TARGET_ARCH_S390X |
| __ SmiTag(r2); |
| #endif |
| __ SmiToPtrArrayOffset(r8, r2); |
| __ AddP(r4, r4, r8); |
| } |
| __ b(&arguments_done); |
| __ bind(&arguments_adaptor); |
| { |
| __ LoadP(r2, MemOperand(r5, ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| __ SmiToPtrArrayOffset(r8, r2); |
| __ AddP(r4, r5, r8); |
| } |
| __ bind(&arguments_done); |
| __ AddP(r4, r4, Operand(StandardFrameConstants::kCallerSPOffset)); |
| |
| // ----------- S t a t e ------------- |
| // -- cp : context |
| // -- r2 : number of rest parameters (tagged) |
| // -- r3 : function |
| // -- r4 : pointer just past first rest parameters |
| // -- r8 : size of rest parameters |
| // -- lr : return address |
| // ----------------------------------- |
| |
| // Allocate space for the strict arguments object plus the backing store. |
| Label allocate, done_allocate; |
| __ mov(r9, Operand(JSStrictArgumentsObject::kSize + FixedArray::kHeaderSize)); |
| __ AddP(r9, r9, r8); |
| __ Allocate(r9, r5, r6, r7, &allocate, NO_ALLOCATION_FLAGS); |
| __ bind(&done_allocate); |
| |
| // Setup the elements array in r5. |
| __ LoadRoot(r3, Heap::kFixedArrayMapRootIndex); |
| __ StoreP(r3, FieldMemOperand(r5, FixedArray::kMapOffset), r0); |
| __ StoreP(r2, FieldMemOperand(r5, FixedArray::kLengthOffset), r0); |
| __ AddP(r6, r5, |
| Operand(FixedArray::kHeaderSize - kHeapObjectTag - kPointerSize)); |
| { |
| Label loop, done_loop; |
| __ SmiUntag(r1, r2); |
| __ LoadAndTestP(r1, r1); |
| __ beq(&done_loop); |
| __ bind(&loop); |
| __ lay(r4, MemOperand(r4, -kPointerSize)); |
| __ LoadP(ip, MemOperand(r4)); |
| __ la(r6, MemOperand(r6, kPointerSize)); |
| __ StoreP(ip, MemOperand(r6)); |
| __ BranchOnCount(r1, &loop); |
| __ bind(&done_loop); |
| __ AddP(r6, r6, Operand(kPointerSize)); |
| } |
| |
| // Setup the rest parameter array in r6. |
| __ LoadNativeContextSlot(Context::STRICT_ARGUMENTS_MAP_INDEX, r3); |
| __ StoreP(r3, MemOperand(r6, JSStrictArgumentsObject::kMapOffset)); |
| __ LoadRoot(r3, Heap::kEmptyFixedArrayRootIndex); |
| __ StoreP(r3, MemOperand(r6, JSStrictArgumentsObject::kPropertiesOffset)); |
| __ StoreP(r5, MemOperand(r6, JSStrictArgumentsObject::kElementsOffset)); |
| __ StoreP(r2, MemOperand(r6, JSStrictArgumentsObject::kLengthOffset)); |
| STATIC_ASSERT(JSStrictArgumentsObject::kSize == 4 * kPointerSize); |
| __ AddP(r2, r6, Operand(kHeapObjectTag)); |
| __ Ret(); |
| |
| // Fall back to %AllocateInNewSpace (if not too big). |
| Label too_big_for_new_space; |
| __ bind(&allocate); |
| __ CmpP(r9, Operand(Page::kMaxRegularHeapObjectSize)); |
| __ bgt(&too_big_for_new_space); |
| { |
| FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL); |
| __ SmiTag(r9); |
| __ Push(r2, r4, r9); |
| __ CallRuntime(Runtime::kAllocateInNewSpace); |
| __ LoadRR(r5, r2); |
| __ Pop(r2, r4); |
| } |
| __ b(&done_allocate); |
| |
| // Fall back to %NewStrictArguments. |
| __ bind(&too_big_for_new_space); |
| __ push(r3); |
| __ TailCallRuntime(Runtime::kNewStrictArguments); |
| } |
| |
| void StoreGlobalViaContextStub::Generate(MacroAssembler* masm) { |
| Register value = r2; |
| Register slot = r4; |
| |
| Register cell = r3; |
| Register cell_details = r5; |
| Register cell_value = r6; |
| Register cell_value_map = r7; |
| Register scratch = r8; |
| |
| Register context = cp; |
| Register context_temp = cell; |
| |
| Label fast_heapobject_case, fast_smi_case, slow_case; |
| |
| if (FLAG_debug_code) { |
| __ CompareRoot(value, Heap::kTheHoleValueRootIndex); |
| __ Check(ne, kUnexpectedValue); |
| } |
| |
| // Go up the context chain to the script context. |
| for (int i = 0; i < depth(); i++) { |
| __ LoadP(context_temp, ContextMemOperand(context, Context::PREVIOUS_INDEX)); |
| context = context_temp; |
| } |
| |
| // Load the PropertyCell at the specified slot. |
| __ ShiftLeftP(r0, slot, Operand(kPointerSizeLog2)); |
| __ AddP(cell, context, r0); |
| __ LoadP(cell, ContextMemOperand(cell)); |
| |
| // Load PropertyDetails for the cell (actually only the cell_type and kind). |
| __ LoadP(cell_details, FieldMemOperand(cell, PropertyCell::kDetailsOffset)); |
| __ SmiUntag(cell_details); |
| __ AndP(cell_details, cell_details, |
| Operand(PropertyDetails::PropertyCellTypeField::kMask | |
| PropertyDetails::KindField::kMask | |
| PropertyDetails::kAttributesReadOnlyMask)); |
| |
| // Check if PropertyCell holds mutable data. |
| Label not_mutable_data; |
| __ CmpP(cell_details, Operand(PropertyDetails::PropertyCellTypeField::encode( |
| PropertyCellType::kMutable) | |
| PropertyDetails::KindField::encode(kData))); |
| __ bne(¬_mutable_data); |
| __ JumpIfSmi(value, &fast_smi_case); |
| |
| __ bind(&fast_heapobject_case); |
| __ StoreP(value, FieldMemOperand(cell, PropertyCell::kValueOffset), r0); |
| // RecordWriteField clobbers the value register, so we copy it before the |
| // call. |
| __ LoadRR(r5, value); |
| __ RecordWriteField(cell, PropertyCell::kValueOffset, r5, scratch, |
| kLRHasNotBeenSaved, kDontSaveFPRegs, EMIT_REMEMBERED_SET, |
| OMIT_SMI_CHECK); |
| __ Ret(); |
| |
| __ bind(¬_mutable_data); |
| // Check if PropertyCell value matches the new value (relevant for Constant, |
| // ConstantType and Undefined cells). |
| Label not_same_value; |
| __ LoadP(cell_value, FieldMemOperand(cell, PropertyCell::kValueOffset)); |
| __ CmpP(cell_value, value); |
| __ bne(¬_same_value); |
| |
| // Make sure the PropertyCell is not marked READ_ONLY. |
| __ AndP(r0, cell_details, Operand(PropertyDetails::kAttributesReadOnlyMask)); |
| __ bne(&slow_case); |
| |
| if (FLAG_debug_code) { |
| Label done; |
| // This can only be true for Constant, ConstantType and Undefined cells, |
| // because we never store the_hole via this stub. |
| __ CmpP(cell_details, |
| Operand(PropertyDetails::PropertyCellTypeField::encode( |
| PropertyCellType::kConstant) | |
| PropertyDetails::KindField::encode(kData))); |
| __ beq(&done); |
| __ CmpP(cell_details, |
| Operand(PropertyDetails::PropertyCellTypeField::encode( |
| PropertyCellType::kConstantType) | |
| PropertyDetails::KindField::encode(kData))); |
| __ beq(&done); |
| __ CmpP(cell_details, |
| Operand(PropertyDetails::PropertyCellTypeField::encode( |
| PropertyCellType::kUndefined) | |
| PropertyDetails::KindField::encode(kData))); |
| __ Check(eq, kUnexpectedValue); |
| __ bind(&done); |
| } |
| __ Ret(); |
| __ bind(¬_same_value); |
| |
| // Check if PropertyCell contains data with constant type (and is not |
| // READ_ONLY). |
| __ CmpP(cell_details, Operand(PropertyDetails::PropertyCellTypeField::encode( |
| PropertyCellType::kConstantType) | |
| PropertyDetails::KindField::encode(kData))); |
| __ bne(&slow_case); |
| |
| // Now either both old and new values must be smis or both must be heap |
| // objects with same map. |
| Label value_is_heap_object; |
| __ JumpIfNotSmi(value, &value_is_heap_object); |
| __ JumpIfNotSmi(cell_value, &slow_case); |
| // Old and new values are smis, no need for a write barrier here. |
| __ bind(&fast_smi_case); |
| __ StoreP(value, FieldMemOperand(cell, PropertyCell::kValueOffset), r0); |
| __ Ret(); |
| |
| __ bind(&value_is_heap_object); |
| __ JumpIfSmi(cell_value, &slow_case); |
| |
| __ LoadP(cell_value_map, FieldMemOperand(cell_value, HeapObject::kMapOffset)); |
| __ LoadP(scratch, FieldMemOperand(value, HeapObject::kMapOffset)); |
| __ CmpP(cell_value_map, scratch); |
| __ beq(&fast_heapobject_case); |
| |
| // Fallback to runtime. |
| __ bind(&slow_case); |
| __ SmiTag(slot); |
| __ Push(slot, value); |
| __ TailCallRuntime(is_strict(language_mode()) |
| ? Runtime::kStoreGlobalViaContext_Strict |
| : Runtime::kStoreGlobalViaContext_Sloppy); |
| } |
| |
| static int AddressOffset(ExternalReference ref0, ExternalReference ref1) { |
| return ref0.address() - ref1.address(); |
| } |
| |
| // Calls an API function. Allocates HandleScope, extracts returned value |
| // from handle and propagates exceptions. Restores context. stack_space |
| // - space to be unwound on exit (includes the call JS arguments space and |
| // the additional space allocated for the fast call). |
| static void CallApiFunctionAndReturn(MacroAssembler* masm, |
| Register function_address, |
| ExternalReference thunk_ref, |
| int stack_space, |
| MemOperand* stack_space_operand, |
| MemOperand return_value_operand, |
| MemOperand* context_restore_operand) { |
| Isolate* isolate = masm->isolate(); |
| ExternalReference next_address = |
| ExternalReference::handle_scope_next_address(isolate); |
| const int kNextOffset = 0; |
| const int kLimitOffset = AddressOffset( |
| ExternalReference::handle_scope_limit_address(isolate), next_address); |
| const int kLevelOffset = AddressOffset( |
| ExternalReference::handle_scope_level_address(isolate), next_address); |
| |
| // Additional parameter is the address of the actual callback. |
| DCHECK(function_address.is(r3) || function_address.is(r4)); |
| Register scratch = r5; |
| |
| __ mov(scratch, Operand(ExternalReference::is_profiling_address(isolate))); |
| __ LoadlB(scratch, MemOperand(scratch, 0)); |
| __ CmpP(scratch, Operand::Zero()); |
| |
| Label profiler_disabled; |
| Label end_profiler_check; |
| __ beq(&profiler_disabled, Label::kNear); |
| __ mov(scratch, Operand(thunk_ref)); |
| __ b(&end_profiler_check, Label::kNear); |
| __ bind(&profiler_disabled); |
| __ LoadRR(scratch, function_address); |
| __ bind(&end_profiler_check); |
| |
| // Allocate HandleScope in callee-save registers. |
| // r9 - next_address |
| // r6 - next_address->kNextOffset |
| // r7 - next_address->kLimitOffset |
| // r8 - next_address->kLevelOffset |
| __ mov(r9, Operand(next_address)); |
| __ LoadP(r6, MemOperand(r9, kNextOffset)); |
| __ LoadP(r7, MemOperand(r9, kLimitOffset)); |
| __ LoadlW(r8, MemOperand(r9, kLevelOffset)); |
| __ AddP(r8, Operand(1)); |
| __ StoreW(r8, MemOperand(r9, kLevelOffset)); |
| |
| if (FLAG_log_timer_events) { |
| FrameScope frame(masm, StackFrame::MANUAL); |
| __ PushSafepointRegisters(); |
| __ PrepareCallCFunction(1, r2); |
| __ mov(r2, Operand(ExternalReference::isolate_address(isolate))); |
| __ CallCFunction(ExternalReference::log_enter_external_function(isolate), |
| 1); |
| __ PopSafepointRegisters(); |
| } |
| |
| // Native call returns to the DirectCEntry stub which redirects to the |
| // return address pushed on stack (could have moved after GC). |
| // DirectCEntry stub itself is generated early and never moves. |
| DirectCEntryStub stub(isolate); |
| stub.GenerateCall(masm, scratch); |
| |
| if (FLAG_log_timer_events) { |
| FrameScope frame(masm, StackFrame::MANUAL); |
| __ PushSafepointRegisters(); |
| __ PrepareCallCFunction(1, r2); |
| __ mov(r2, Operand(ExternalReference::isolate_address(isolate))); |
| __ CallCFunction(ExternalReference::log_leave_external_function(isolate), |
| 1); |
| __ PopSafepointRegisters(); |
| } |
| |
| Label promote_scheduled_exception; |
| Label delete_allocated_handles; |
| Label leave_exit_frame; |
| Label return_value_loaded; |
| |
| // load value from ReturnValue |
| __ LoadP(r2, return_value_operand); |
| __ bind(&return_value_loaded); |
| // No more valid handles (the result handle was the last one). Restore |
| // previous handle scope. |
| __ StoreP(r6, MemOperand(r9, kNextOffset)); |
| if (__ emit_debug_code()) { |
| __ LoadlW(r3, MemOperand(r9, kLevelOffset)); |
| __ CmpP(r3, r8); |
| __ Check(eq, kUnexpectedLevelAfterReturnFromApiCall); |
| } |
| __ SubP(r8, Operand(1)); |
| __ StoreW(r8, MemOperand(r9, kLevelOffset)); |
| __ CmpP(r7, MemOperand(r9, kLimitOffset)); |
| __ bne(&delete_allocated_handles, Label::kNear); |
| |
| // Leave the API exit frame. |
| __ bind(&leave_exit_frame); |
| bool restore_context = context_restore_operand != NULL; |
| if (restore_context) { |
| __ LoadP(cp, *context_restore_operand); |
| } |
| // LeaveExitFrame expects unwind space to be in a register. |
| if (stack_space_operand != NULL) { |
| __ l(r6, *stack_space_operand); |
| } else { |
| __ mov(r6, Operand(stack_space)); |
| } |
| __ LeaveExitFrame(false, r6, !restore_context, stack_space_operand != NULL); |
| |
| // Check if the function scheduled an exception. |
| __ mov(r7, Operand(ExternalReference::scheduled_exception_address(isolate))); |
| __ LoadP(r7, MemOperand(r7)); |
| __ CompareRoot(r7, Heap::kTheHoleValueRootIndex); |
| __ bne(&promote_scheduled_exception, Label::kNear); |
| |
| __ b(r14); |
| |
| // Re-throw by promoting a scheduled exception. |
| __ bind(&promote_scheduled_exception); |
| __ TailCallRuntime(Runtime::kPromoteScheduledException); |
| |
| // HandleScope limit has changed. Delete allocated extensions. |
| __ bind(&delete_allocated_handles); |
| __ StoreP(r7, MemOperand(r9, kLimitOffset)); |
| __ LoadRR(r6, r2); |
| __ PrepareCallCFunction(1, r7); |
| __ mov(r2, Operand(ExternalReference::isolate_address(isolate))); |
| __ CallCFunction(ExternalReference::delete_handle_scope_extensions(isolate), |
| 1); |
| __ LoadRR(r2, r6); |
| __ b(&leave_exit_frame, Label::kNear); |
| } |
| |
| void CallApiCallbackStub::Generate(MacroAssembler* masm) { |
| // ----------- S t a t e ------------- |
| // -- r2 : callee |
| // -- r6 : call_data |
| // -- r4 : holder |
| // -- r3 : api_function_address |
| // -- cp : context |
| // -- |
| // -- sp[0] : last argument |
| // -- ... |
| // -- sp[(argc - 1)* 4] : first argument |
| // -- sp[argc * 4] : receiver |
| // ----------------------------------- |
| |
| Register callee = r2; |
| Register call_data = r6; |
| Register holder = r4; |
| Register api_function_address = r3; |
| Register context = cp; |
| |
| typedef FunctionCallbackArguments FCA; |
| |
| STATIC_ASSERT(FCA::kContextSaveIndex == 6); |
| STATIC_ASSERT(FCA::kCalleeIndex == 5); |
| STATIC_ASSERT(FCA::kDataIndex == 4); |
| STATIC_ASSERT(FCA::kReturnValueOffset == 3); |
| STATIC_ASSERT(FCA::kReturnValueDefaultValueIndex == 2); |
| STATIC_ASSERT(FCA::kIsolateIndex == 1); |
| STATIC_ASSERT(FCA::kHolderIndex == 0); |
| STATIC_ASSERT(FCA::kNewTargetIndex == 7); |
| STATIC_ASSERT(FCA::kArgsLength == 8); |
| |
| // new target |
| __ PushRoot(Heap::kUndefinedValueRootIndex); |
| |
| // context save |
| __ push(context); |
| if (!is_lazy()) { |
| // load context from callee |
| __ LoadP(context, FieldMemOperand(callee, JSFunction::kContextOffset)); |
| } |
| |
| // callee |
| __ push(callee); |
| |
| // call data |
| __ push(call_data); |
| |
| Register scratch = call_data; |
| if (!call_data_undefined()) { |
| __ LoadRoot(scratch, Heap::kUndefinedValueRootIndex); |
| } |
| // return value |
| __ push(scratch); |
| // return value default |
| __ push(scratch); |
| // isolate |
| __ mov(scratch, Operand(ExternalReference::isolate_address(masm->isolate()))); |
| __ push(scratch); |
| // holder |
| __ push(holder); |
| |
| // Prepare arguments. |
| __ LoadRR(scratch, sp); |
| |
| // Allocate the v8::Arguments structure in the arguments' space since |
| // it's not controlled by GC. |
| // S390 LINUX ABI: |
| // |
| // Create 4 extra slots on stack: |
| // [0] space for DirectCEntryStub's LR save |
| // [1-3] FunctionCallbackInfo |
| const int kApiStackSpace = 4; |
| const int kFunctionCallbackInfoOffset = |
| (kStackFrameExtraParamSlot + 1) * kPointerSize; |
| |
| FrameScope frame_scope(masm, StackFrame::MANUAL); |
| __ EnterExitFrame(false, kApiStackSpace); |
| |
| DCHECK(!api_function_address.is(r2) && !scratch.is(r2)); |
| // r2 = FunctionCallbackInfo& |
| // Arguments is after the return address. |
| __ AddP(r2, sp, Operand(kFunctionCallbackInfoOffset)); |
| // FunctionCallbackInfo::implicit_args_ |
| __ StoreP(scratch, MemOperand(r2, 0 * kPointerSize)); |
| // FunctionCallbackInfo::values_ |
| __ AddP(ip, scratch, Operand((FCA::kArgsLength - 1 + argc()) * kPointerSize)); |
| __ StoreP(ip, MemOperand(r2, 1 * kPointerSize)); |
| // FunctionCallbackInfo::length_ = argc |
| __ LoadImmP(ip, Operand(argc())); |
| __ StoreW(ip, MemOperand(r2, 2 * kPointerSize)); |
| |
| ExternalReference thunk_ref = |
| ExternalReference::invoke_function_callback(masm->isolate()); |
| |
| AllowExternalCallThatCantCauseGC scope(masm); |
| MemOperand context_restore_operand( |
| fp, (2 + FCA::kContextSaveIndex) * kPointerSize); |
| // Stores return the first js argument |
| int return_value_offset = 0; |
| if (is_store()) { |
| return_value_offset = 2 + FCA::kArgsLength; |
| } else { |
| return_value_offset = 2 + FCA::kReturnValueOffset; |
| } |
| MemOperand return_value_operand(fp, return_value_offset * kPointerSize); |
| int stack_space = 0; |
| MemOperand length_operand = |
| MemOperand(sp, kFunctionCallbackInfoOffset + 2 * kPointerSize); |
| MemOperand* stack_space_operand = &length_operand; |
| stack_space = argc() + FCA::kArgsLength + 1; |
| stack_space_operand = NULL; |
| CallApiFunctionAndReturn(masm, api_function_address, thunk_ref, stack_space, |
| stack_space_operand, return_value_operand, |
| &context_restore_operand); |
| } |
| |
| void CallApiGetterStub::Generate(MacroAssembler* masm) { |
| int arg0Slot = 0; |
| int accessorInfoSlot = 0; |
| int apiStackSpace = 0; |
| // Build v8::PropertyCallbackInfo::args_ array on the stack and push property |
| // name below the exit frame to make GC aware of them. |
| STATIC_ASSERT(PropertyCallbackArguments::kShouldThrowOnErrorIndex == 0); |
| STATIC_ASSERT(PropertyCallbackArguments::kHolderIndex == 1); |
| STATIC_ASSERT(PropertyCallbackArguments::kIsolateIndex == 2); |
| STATIC_ASSERT(PropertyCallbackArguments::kReturnValueDefaultValueIndex == 3); |
| STATIC_ASSERT(PropertyCallbackArguments::kReturnValueOffset == 4); |
| STATIC_ASSERT(PropertyCallbackArguments::kDataIndex == 5); |
| STATIC_ASSERT(PropertyCallbackArguments::kThisIndex == 6); |
| STATIC_ASSERT(PropertyCallbackArguments::kArgsLength == 7); |
| |
| Register receiver = ApiGetterDescriptor::ReceiverRegister(); |
| Register holder = ApiGetterDescriptor::HolderRegister(); |
| Register callback = ApiGetterDescriptor::CallbackRegister(); |
| Register scratch = r6; |
| DCHECK(!AreAliased(receiver, holder, callback, scratch)); |
| |
| Register api_function_address = r4; |
| |
| __ push(receiver); |
| // Push data from AccessorInfo. |
| __ LoadP(scratch, FieldMemOperand(callback, AccessorInfo::kDataOffset)); |
| __ push(scratch); |
| __ LoadRoot(scratch, Heap::kUndefinedValueRootIndex); |
| __ Push(scratch, scratch); |
| __ mov(scratch, Operand(ExternalReference::isolate_address(isolate()))); |
| __ Push(scratch, holder); |
| __ Push(Smi::FromInt(0)); // should_throw_on_error -> false |
| __ LoadP(scratch, FieldMemOperand(callback, AccessorInfo::kNameOffset)); |
| __ push(scratch); |
| |
| // v8::PropertyCallbackInfo::args_ array and name handle. |
| const int kStackUnwindSpace = PropertyCallbackArguments::kArgsLength + 1; |
| |
| // Load address of v8::PropertyAccessorInfo::args_ array and name handle. |
| __ LoadRR(r2, sp); // r2 = Handle<Name> |
| __ AddP(r3, r2, Operand(1 * kPointerSize)); // r3 = v8::PCI::args_ |
| |
| // If ABI passes Handles (pointer-sized struct) in a register: |
| // |
| // Create 2 extra slots on stack: |
| // [0] space for DirectCEntryStub's LR save |
| // [1] AccessorInfo& |
| // |
| // Otherwise: |
| // |
| // Create 3 extra slots on stack: |
| // [0] space for DirectCEntryStub's LR save |
| // [1] copy of Handle (first arg) |
| // [2] AccessorInfo& |
| if (ABI_PASSES_HANDLES_IN_REGS) { |
| accessorInfoSlot = kStackFrameExtraParamSlot + 1; |
| apiStackSpace = 2; |
| } else { |
| arg0Slot = kStackFrameExtraParamSlot + 1; |
| accessorInfoSlot = arg0Slot + 1; |
| apiStackSpace = 3; |
| } |
| |
| FrameScope frame_scope(masm, StackFrame::MANUAL); |
| __ EnterExitFrame(false, apiStackSpace); |
| |
| if (!ABI_PASSES_HANDLES_IN_REGS) { |
| // pass 1st arg by reference |
| __ StoreP(r2, MemOperand(sp, arg0Slot * kPointerSize)); |
| __ AddP(r2, sp, Operand(arg0Slot * kPointerSize)); |
| } |
| |
| // Create v8::PropertyCallbackInfo object on the stack and initialize |
| // it's args_ field. |
| __ StoreP(r3, MemOperand(sp, accessorInfoSlot * kPointerSize)); |
| __ AddP(r3, sp, Operand(accessorInfoSlot * kPointerSize)); |
| // r3 = v8::PropertyCallbackInfo& |
| |
| ExternalReference thunk_ref = |
| ExternalReference::invoke_accessor_getter_callback(isolate()); |
| |
| __ LoadP(scratch, FieldMemOperand(callback, AccessorInfo::kJsGetterOffset)); |
| __ LoadP(api_function_address, |
| FieldMemOperand(scratch, Foreign::kForeignAddressOffset)); |
| |
| // +3 is to skip prolog, return address and name handle. |
| MemOperand return_value_operand( |
| fp, (PropertyCallbackArguments::kReturnValueOffset + 3) * kPointerSize); |
| CallApiFunctionAndReturn(masm, api_function_address, thunk_ref, |
| kStackUnwindSpace, NULL, return_value_operand, NULL); |
| } |
| |
| #undef __ |
| |
| } // namespace internal |
| } // namespace v8 |
| |
| #endif // V8_TARGET_ARCH_S390 |