| // 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. |
| |
| #include "src/compiler/instruction-selector-impl.h" |
| #include "src/compiler/node-matchers.h" |
| #include "src/compiler-intrinsics.h" |
| |
| namespace v8 { |
| namespace internal { |
| namespace compiler { |
| |
| // Adds Arm-specific methods for generating InstructionOperands. |
| class ArmOperandGenerator V8_FINAL : public OperandGenerator { |
| public: |
| explicit ArmOperandGenerator(InstructionSelector* selector) |
| : OperandGenerator(selector) {} |
| |
| InstructionOperand* UseOperand(Node* node, InstructionCode opcode) { |
| if (CanBeImmediate(node, opcode)) { |
| return UseImmediate(node); |
| } |
| return UseRegister(node); |
| } |
| |
| bool CanBeImmediate(Node* node, InstructionCode opcode) { |
| int32_t value; |
| switch (node->opcode()) { |
| case IrOpcode::kInt32Constant: |
| case IrOpcode::kNumberConstant: |
| value = ValueOf<int32_t>(node->op()); |
| break; |
| default: |
| return false; |
| } |
| switch (ArchOpcodeField::decode(opcode)) { |
| case kArmAnd: |
| case kArmMov: |
| case kArmMvn: |
| case kArmBic: |
| return ImmediateFitsAddrMode1Instruction(value) || |
| ImmediateFitsAddrMode1Instruction(~value); |
| |
| case kArmAdd: |
| case kArmSub: |
| case kArmCmp: |
| case kArmCmn: |
| return ImmediateFitsAddrMode1Instruction(value) || |
| ImmediateFitsAddrMode1Instruction(-value); |
| |
| case kArmTst: |
| case kArmTeq: |
| case kArmOrr: |
| case kArmEor: |
| case kArmRsb: |
| return ImmediateFitsAddrMode1Instruction(value); |
| |
| case kArmFloat64Load: |
| case kArmFloat64Store: |
| return value >= -1020 && value <= 1020 && (value % 4) == 0; |
| |
| case kArmLoadWord8: |
| case kArmStoreWord8: |
| case kArmLoadWord32: |
| case kArmStoreWord32: |
| case kArmStoreWriteBarrier: |
| return value >= -4095 && value <= 4095; |
| |
| case kArmLoadWord16: |
| case kArmStoreWord16: |
| return value >= -255 && value <= 255; |
| |
| case kArchJmp: |
| case kArchNop: |
| case kArchRet: |
| case kArchDeoptimize: |
| case kArmMul: |
| case kArmMla: |
| case kArmMls: |
| case kArmSdiv: |
| case kArmUdiv: |
| case kArmBfc: |
| case kArmUbfx: |
| case kArmCallCodeObject: |
| case kArmCallJSFunction: |
| case kArmCallAddress: |
| case kArmPush: |
| case kArmDrop: |
| case kArmVcmpF64: |
| case kArmVaddF64: |
| case kArmVsubF64: |
| case kArmVmulF64: |
| case kArmVmlaF64: |
| case kArmVmlsF64: |
| case kArmVdivF64: |
| case kArmVmodF64: |
| case kArmVnegF64: |
| case kArmVcvtF64S32: |
| case kArmVcvtF64U32: |
| case kArmVcvtS32F64: |
| case kArmVcvtU32F64: |
| return false; |
| } |
| UNREACHABLE(); |
| return false; |
| } |
| |
| private: |
| bool ImmediateFitsAddrMode1Instruction(int32_t imm) const { |
| return Assembler::ImmediateFitsAddrMode1Instruction(imm); |
| } |
| }; |
| |
| |
| static void VisitRRRFloat64(InstructionSelector* selector, ArchOpcode opcode, |
| Node* node) { |
| ArmOperandGenerator g(selector); |
| selector->Emit(opcode, g.DefineAsDoubleRegister(node), |
| g.UseDoubleRegister(node->InputAt(0)), |
| g.UseDoubleRegister(node->InputAt(1))); |
| } |
| |
| |
| static bool TryMatchROR(InstructionSelector* selector, |
| InstructionCode* opcode_return, Node* node, |
| InstructionOperand** value_return, |
| InstructionOperand** shift_return) { |
| ArmOperandGenerator g(selector); |
| if (node->opcode() != IrOpcode::kWord32Or) return false; |
| Int32BinopMatcher m(node); |
| Node* shl = m.left().node(); |
| Node* shr = m.right().node(); |
| if (m.left().IsWord32Shr() && m.right().IsWord32Shl()) { |
| std::swap(shl, shr); |
| } else if (!m.left().IsWord32Shl() || !m.right().IsWord32Shr()) { |
| return false; |
| } |
| Int32BinopMatcher mshr(shr); |
| Int32BinopMatcher mshl(shl); |
| Node* value = mshr.left().node(); |
| if (value != mshl.left().node()) return false; |
| Node* shift = mshr.right().node(); |
| Int32Matcher mshift(shift); |
| if (mshift.IsInRange(1, 31) && mshl.right().Is(32 - mshift.Value())) { |
| *opcode_return |= AddressingModeField::encode(kMode_Operand2_R_ROR_I); |
| *value_return = g.UseRegister(value); |
| *shift_return = g.UseImmediate(shift); |
| return true; |
| } |
| if (mshl.right().IsInt32Sub()) { |
| Int32BinopMatcher mshlright(mshl.right().node()); |
| if (!mshlright.left().Is(32)) return false; |
| if (mshlright.right().node() != shift) return false; |
| *opcode_return |= AddressingModeField::encode(kMode_Operand2_R_ROR_R); |
| *value_return = g.UseRegister(value); |
| *shift_return = g.UseRegister(shift); |
| return true; |
| } |
| return false; |
| } |
| |
| |
| static inline bool TryMatchASR(InstructionSelector* selector, |
| InstructionCode* opcode_return, Node* node, |
| InstructionOperand** value_return, |
| InstructionOperand** shift_return) { |
| ArmOperandGenerator g(selector); |
| if (node->opcode() != IrOpcode::kWord32Sar) return false; |
| Int32BinopMatcher m(node); |
| *value_return = g.UseRegister(m.left().node()); |
| if (m.right().IsInRange(1, 32)) { |
| *opcode_return |= AddressingModeField::encode(kMode_Operand2_R_ASR_I); |
| *shift_return = g.UseImmediate(m.right().node()); |
| } else { |
| *opcode_return |= AddressingModeField::encode(kMode_Operand2_R_ASR_R); |
| *shift_return = g.UseRegister(m.right().node()); |
| } |
| return true; |
| } |
| |
| |
| static inline bool TryMatchLSL(InstructionSelector* selector, |
| InstructionCode* opcode_return, Node* node, |
| InstructionOperand** value_return, |
| InstructionOperand** shift_return) { |
| ArmOperandGenerator g(selector); |
| if (node->opcode() != IrOpcode::kWord32Shl) return false; |
| Int32BinopMatcher m(node); |
| *value_return = g.UseRegister(m.left().node()); |
| if (m.right().IsInRange(0, 31)) { |
| *opcode_return |= AddressingModeField::encode(kMode_Operand2_R_LSL_I); |
| *shift_return = g.UseImmediate(m.right().node()); |
| } else { |
| *opcode_return |= AddressingModeField::encode(kMode_Operand2_R_LSL_R); |
| *shift_return = g.UseRegister(m.right().node()); |
| } |
| return true; |
| } |
| |
| |
| static inline bool TryMatchLSR(InstructionSelector* selector, |
| InstructionCode* opcode_return, Node* node, |
| InstructionOperand** value_return, |
| InstructionOperand** shift_return) { |
| ArmOperandGenerator g(selector); |
| if (node->opcode() != IrOpcode::kWord32Shr) return false; |
| Int32BinopMatcher m(node); |
| *value_return = g.UseRegister(m.left().node()); |
| if (m.right().IsInRange(1, 32)) { |
| *opcode_return |= AddressingModeField::encode(kMode_Operand2_R_LSR_I); |
| *shift_return = g.UseImmediate(m.right().node()); |
| } else { |
| *opcode_return |= AddressingModeField::encode(kMode_Operand2_R_LSR_R); |
| *shift_return = g.UseRegister(m.right().node()); |
| } |
| return true; |
| } |
| |
| |
| static inline bool TryMatchShift(InstructionSelector* selector, |
| InstructionCode* opcode_return, Node* node, |
| InstructionOperand** value_return, |
| InstructionOperand** shift_return) { |
| return ( |
| TryMatchASR(selector, opcode_return, node, value_return, shift_return) || |
| TryMatchLSL(selector, opcode_return, node, value_return, shift_return) || |
| TryMatchLSR(selector, opcode_return, node, value_return, shift_return) || |
| TryMatchROR(selector, opcode_return, node, value_return, shift_return)); |
| } |
| |
| |
| static inline bool TryMatchImmediateOrShift(InstructionSelector* selector, |
| InstructionCode* opcode_return, |
| Node* node, |
| size_t* input_count_return, |
| InstructionOperand** inputs) { |
| ArmOperandGenerator g(selector); |
| if (g.CanBeImmediate(node, *opcode_return)) { |
| *opcode_return |= AddressingModeField::encode(kMode_Operand2_I); |
| inputs[0] = g.UseImmediate(node); |
| *input_count_return = 1; |
| return true; |
| } |
| if (TryMatchShift(selector, opcode_return, node, &inputs[0], &inputs[1])) { |
| *input_count_return = 2; |
| return true; |
| } |
| return false; |
| } |
| |
| |
| static void VisitBinop(InstructionSelector* selector, Node* node, |
| InstructionCode opcode, InstructionCode reverse_opcode, |
| FlagsContinuation* cont) { |
| ArmOperandGenerator g(selector); |
| Int32BinopMatcher m(node); |
| InstructionOperand* inputs[5]; |
| size_t input_count = 0; |
| InstructionOperand* outputs[2]; |
| size_t output_count = 0; |
| |
| if (TryMatchImmediateOrShift(selector, &opcode, m.right().node(), |
| &input_count, &inputs[1])) { |
| inputs[0] = g.UseRegister(m.left().node()); |
| input_count++; |
| } else if (TryMatchImmediateOrShift(selector, &reverse_opcode, |
| m.left().node(), &input_count, |
| &inputs[1])) { |
| inputs[0] = g.UseRegister(m.right().node()); |
| opcode = reverse_opcode; |
| input_count++; |
| } else { |
| opcode |= AddressingModeField::encode(kMode_Operand2_R); |
| inputs[input_count++] = g.UseRegister(m.left().node()); |
| inputs[input_count++] = g.UseRegister(m.right().node()); |
| } |
| |
| if (cont->IsBranch()) { |
| inputs[input_count++] = g.Label(cont->true_block()); |
| inputs[input_count++] = g.Label(cont->false_block()); |
| } |
| |
| outputs[output_count++] = g.DefineAsRegister(node); |
| if (cont->IsSet()) { |
| outputs[output_count++] = g.DefineAsRegister(cont->result()); |
| } |
| |
| DCHECK_NE(0, input_count); |
| DCHECK_NE(0, output_count); |
| DCHECK_GE(ARRAY_SIZE(inputs), input_count); |
| DCHECK_GE(ARRAY_SIZE(outputs), output_count); |
| DCHECK_NE(kMode_None, AddressingModeField::decode(opcode)); |
| |
| Instruction* instr = selector->Emit(cont->Encode(opcode), output_count, |
| outputs, input_count, inputs); |
| if (cont->IsBranch()) instr->MarkAsControl(); |
| } |
| |
| |
| static void VisitBinop(InstructionSelector* selector, Node* node, |
| InstructionCode opcode, InstructionCode reverse_opcode) { |
| FlagsContinuation cont; |
| VisitBinop(selector, node, opcode, reverse_opcode, &cont); |
| } |
| |
| |
| void InstructionSelector::VisitLoad(Node* node) { |
| MachineType rep = OpParameter<MachineType>(node); |
| ArmOperandGenerator g(this); |
| Node* base = node->InputAt(0); |
| Node* index = node->InputAt(1); |
| |
| InstructionOperand* result = rep == kMachineFloat64 |
| ? g.DefineAsDoubleRegister(node) |
| : g.DefineAsRegister(node); |
| |
| ArchOpcode opcode; |
| switch (rep) { |
| case kMachineFloat64: |
| opcode = kArmFloat64Load; |
| break; |
| case kMachineWord8: |
| opcode = kArmLoadWord8; |
| break; |
| case kMachineWord16: |
| opcode = kArmLoadWord16; |
| break; |
| case kMachineTagged: // Fall through. |
| case kMachineWord32: |
| opcode = kArmLoadWord32; |
| break; |
| default: |
| UNREACHABLE(); |
| return; |
| } |
| |
| if (g.CanBeImmediate(index, opcode)) { |
| Emit(opcode | AddressingModeField::encode(kMode_Offset_RI), result, |
| g.UseRegister(base), g.UseImmediate(index)); |
| } else if (g.CanBeImmediate(base, opcode)) { |
| Emit(opcode | AddressingModeField::encode(kMode_Offset_RI), result, |
| g.UseRegister(index), g.UseImmediate(base)); |
| } else { |
| Emit(opcode | AddressingModeField::encode(kMode_Offset_RR), result, |
| g.UseRegister(base), g.UseRegister(index)); |
| } |
| } |
| |
| |
| void InstructionSelector::VisitStore(Node* node) { |
| ArmOperandGenerator g(this); |
| Node* base = node->InputAt(0); |
| Node* index = node->InputAt(1); |
| Node* value = node->InputAt(2); |
| |
| StoreRepresentation store_rep = OpParameter<StoreRepresentation>(node); |
| MachineType rep = store_rep.rep; |
| if (store_rep.write_barrier_kind == kFullWriteBarrier) { |
| DCHECK(rep == kMachineTagged); |
| // TODO(dcarney): refactor RecordWrite function to take temp registers |
| // and pass them here instead of using fixed regs |
| // TODO(dcarney): handle immediate indices. |
| InstructionOperand* temps[] = {g.TempRegister(r5), g.TempRegister(r6)}; |
| Emit(kArmStoreWriteBarrier, NULL, g.UseFixed(base, r4), |
| g.UseFixed(index, r5), g.UseFixed(value, r6), ARRAY_SIZE(temps), |
| temps); |
| return; |
| } |
| DCHECK_EQ(kNoWriteBarrier, store_rep.write_barrier_kind); |
| InstructionOperand* val = rep == kMachineFloat64 ? g.UseDoubleRegister(value) |
| : g.UseRegister(value); |
| |
| ArchOpcode opcode; |
| switch (rep) { |
| case kMachineFloat64: |
| opcode = kArmFloat64Store; |
| break; |
| case kMachineWord8: |
| opcode = kArmStoreWord8; |
| break; |
| case kMachineWord16: |
| opcode = kArmStoreWord16; |
| break; |
| case kMachineTagged: // Fall through. |
| case kMachineWord32: |
| opcode = kArmStoreWord32; |
| break; |
| default: |
| UNREACHABLE(); |
| return; |
| } |
| |
| if (g.CanBeImmediate(index, opcode)) { |
| Emit(opcode | AddressingModeField::encode(kMode_Offset_RI), NULL, |
| g.UseRegister(base), g.UseImmediate(index), val); |
| } else if (g.CanBeImmediate(base, opcode)) { |
| Emit(opcode | AddressingModeField::encode(kMode_Offset_RI), NULL, |
| g.UseRegister(index), g.UseImmediate(base), val); |
| } else { |
| Emit(opcode | AddressingModeField::encode(kMode_Offset_RR), NULL, |
| g.UseRegister(base), g.UseRegister(index), val); |
| } |
| } |
| |
| |
| static inline void EmitBic(InstructionSelector* selector, Node* node, |
| Node* left, Node* right) { |
| ArmOperandGenerator g(selector); |
| InstructionCode opcode = kArmBic; |
| InstructionOperand* value_operand; |
| InstructionOperand* shift_operand; |
| if (TryMatchShift(selector, &opcode, right, &value_operand, &shift_operand)) { |
| selector->Emit(opcode, g.DefineAsRegister(node), g.UseRegister(left), |
| value_operand, shift_operand); |
| return; |
| } |
| selector->Emit(opcode | AddressingModeField::encode(kMode_Operand2_R), |
| g.DefineAsRegister(node), g.UseRegister(left), |
| g.UseRegister(right)); |
| } |
| |
| |
| void InstructionSelector::VisitWord32And(Node* node) { |
| ArmOperandGenerator g(this); |
| Int32BinopMatcher m(node); |
| if (m.left().IsWord32Xor() && CanCover(node, m.left().node())) { |
| Int32BinopMatcher mleft(m.left().node()); |
| if (mleft.right().Is(-1)) { |
| EmitBic(this, node, m.right().node(), mleft.left().node()); |
| return; |
| } |
| } |
| if (m.right().IsWord32Xor() && CanCover(node, m.right().node())) { |
| Int32BinopMatcher mright(m.right().node()); |
| if (mright.right().Is(-1)) { |
| EmitBic(this, node, m.left().node(), mright.left().node()); |
| return; |
| } |
| } |
| if (IsSupported(ARMv7) && m.right().HasValue()) { |
| uint32_t value = m.right().Value(); |
| uint32_t width = CompilerIntrinsics::CountSetBits(value); |
| uint32_t msb = CompilerIntrinsics::CountLeadingZeros(value); |
| if (width != 0 && msb + width == 32) { |
| DCHECK_EQ(0, CompilerIntrinsics::CountTrailingZeros(value)); |
| if (m.left().IsWord32Shr()) { |
| Int32BinopMatcher mleft(m.left().node()); |
| if (mleft.right().IsInRange(0, 31)) { |
| Emit(kArmUbfx, g.DefineAsRegister(node), |
| g.UseRegister(mleft.left().node()), |
| g.UseImmediate(mleft.right().node()), g.TempImmediate(width)); |
| return; |
| } |
| } |
| Emit(kArmUbfx, g.DefineAsRegister(node), g.UseRegister(m.left().node()), |
| g.TempImmediate(0), g.TempImmediate(width)); |
| return; |
| } |
| // Try to interpret this AND as BFC. |
| width = 32 - width; |
| msb = CompilerIntrinsics::CountLeadingZeros(~value); |
| uint32_t lsb = CompilerIntrinsics::CountTrailingZeros(~value); |
| if (msb + width + lsb == 32) { |
| Emit(kArmBfc, g.DefineSameAsFirst(node), g.UseRegister(m.left().node()), |
| g.TempImmediate(lsb), g.TempImmediate(width)); |
| return; |
| } |
| } |
| VisitBinop(this, node, kArmAnd, kArmAnd); |
| } |
| |
| |
| void InstructionSelector::VisitWord32Or(Node* node) { |
| ArmOperandGenerator g(this); |
| InstructionCode opcode = kArmMov; |
| InstructionOperand* value_operand; |
| InstructionOperand* shift_operand; |
| if (TryMatchROR(this, &opcode, node, &value_operand, &shift_operand)) { |
| Emit(opcode, g.DefineAsRegister(node), value_operand, shift_operand); |
| return; |
| } |
| VisitBinop(this, node, kArmOrr, kArmOrr); |
| } |
| |
| |
| void InstructionSelector::VisitWord32Xor(Node* node) { |
| ArmOperandGenerator g(this); |
| Int32BinopMatcher m(node); |
| if (m.right().Is(-1)) { |
| InstructionCode opcode = kArmMvn; |
| InstructionOperand* value_operand; |
| InstructionOperand* shift_operand; |
| if (TryMatchShift(this, &opcode, m.left().node(), &value_operand, |
| &shift_operand)) { |
| Emit(opcode, g.DefineAsRegister(node), value_operand, shift_operand); |
| return; |
| } |
| Emit(opcode | AddressingModeField::encode(kMode_Operand2_R), |
| g.DefineAsRegister(node), g.UseRegister(m.left().node())); |
| return; |
| } |
| VisitBinop(this, node, kArmEor, kArmEor); |
| } |
| |
| |
| template <typename TryMatchShift> |
| static inline void VisitShift(InstructionSelector* selector, Node* node, |
| TryMatchShift try_match_shift) { |
| ArmOperandGenerator g(selector); |
| InstructionCode opcode = kArmMov; |
| InstructionOperand* value_operand = NULL; |
| InstructionOperand* shift_operand = NULL; |
| CHECK( |
| try_match_shift(selector, &opcode, node, &value_operand, &shift_operand)); |
| selector->Emit(opcode, g.DefineAsRegister(node), value_operand, |
| shift_operand); |
| } |
| |
| |
| void InstructionSelector::VisitWord32Shl(Node* node) { |
| VisitShift(this, node, TryMatchLSL); |
| } |
| |
| |
| void InstructionSelector::VisitWord32Shr(Node* node) { |
| ArmOperandGenerator g(this); |
| Int32BinopMatcher m(node); |
| if (IsSupported(ARMv7) && m.left().IsWord32And() && |
| m.right().IsInRange(0, 31)) { |
| int32_t lsb = m.right().Value(); |
| Int32BinopMatcher mleft(m.left().node()); |
| if (mleft.right().HasValue()) { |
| uint32_t value = (mleft.right().Value() >> lsb) << lsb; |
| uint32_t width = CompilerIntrinsics::CountSetBits(value); |
| uint32_t msb = CompilerIntrinsics::CountLeadingZeros(value); |
| if (msb + width + lsb == 32) { |
| DCHECK_EQ(lsb, CompilerIntrinsics::CountTrailingZeros(value)); |
| Emit(kArmUbfx, g.DefineAsRegister(node), |
| g.UseRegister(mleft.left().node()), g.TempImmediate(lsb), |
| g.TempImmediate(width)); |
| return; |
| } |
| } |
| } |
| VisitShift(this, node, TryMatchLSR); |
| } |
| |
| |
| void InstructionSelector::VisitWord32Sar(Node* node) { |
| VisitShift(this, node, TryMatchASR); |
| } |
| |
| |
| void InstructionSelector::VisitInt32Add(Node* node) { |
| ArmOperandGenerator g(this); |
| Int32BinopMatcher m(node); |
| if (m.left().IsInt32Mul() && CanCover(node, m.left().node())) { |
| Int32BinopMatcher mleft(m.left().node()); |
| Emit(kArmMla, g.DefineAsRegister(node), g.UseRegister(mleft.left().node()), |
| g.UseRegister(mleft.right().node()), g.UseRegister(m.right().node())); |
| return; |
| } |
| if (m.right().IsInt32Mul() && CanCover(node, m.right().node())) { |
| Int32BinopMatcher mright(m.right().node()); |
| Emit(kArmMla, g.DefineAsRegister(node), g.UseRegister(mright.left().node()), |
| g.UseRegister(mright.right().node()), g.UseRegister(m.left().node())); |
| return; |
| } |
| VisitBinop(this, node, kArmAdd, kArmAdd); |
| } |
| |
| |
| void InstructionSelector::VisitInt32Sub(Node* node) { |
| ArmOperandGenerator g(this); |
| Int32BinopMatcher m(node); |
| if (IsSupported(MLS) && m.right().IsInt32Mul() && |
| CanCover(node, m.right().node())) { |
| Int32BinopMatcher mright(m.right().node()); |
| Emit(kArmMls, g.DefineAsRegister(node), g.UseRegister(mright.left().node()), |
| g.UseRegister(mright.right().node()), g.UseRegister(m.left().node())); |
| return; |
| } |
| VisitBinop(this, node, kArmSub, kArmRsb); |
| } |
| |
| |
| void InstructionSelector::VisitInt32Mul(Node* node) { |
| ArmOperandGenerator g(this); |
| Int32BinopMatcher m(node); |
| if (m.right().HasValue() && m.right().Value() > 0) { |
| int32_t value = m.right().Value(); |
| if (IsPowerOf2(value - 1)) { |
| Emit(kArmAdd | AddressingModeField::encode(kMode_Operand2_R_LSL_I), |
| g.DefineAsRegister(node), g.UseRegister(m.left().node()), |
| g.UseRegister(m.left().node()), |
| g.TempImmediate(WhichPowerOf2(value - 1))); |
| return; |
| } |
| if (value < kMaxInt && IsPowerOf2(value + 1)) { |
| Emit(kArmRsb | AddressingModeField::encode(kMode_Operand2_R_LSL_I), |
| g.DefineAsRegister(node), g.UseRegister(m.left().node()), |
| g.UseRegister(m.left().node()), |
| g.TempImmediate(WhichPowerOf2(value + 1))); |
| return; |
| } |
| } |
| Emit(kArmMul, g.DefineAsRegister(node), g.UseRegister(m.left().node()), |
| g.UseRegister(m.right().node())); |
| } |
| |
| |
| static void EmitDiv(InstructionSelector* selector, ArchOpcode div_opcode, |
| ArchOpcode f64i32_opcode, ArchOpcode i32f64_opcode, |
| InstructionOperand* result_operand, |
| InstructionOperand* left_operand, |
| InstructionOperand* right_operand) { |
| ArmOperandGenerator g(selector); |
| if (selector->IsSupported(SUDIV)) { |
| selector->Emit(div_opcode, result_operand, left_operand, right_operand); |
| return; |
| } |
| InstructionOperand* left_double_operand = g.TempDoubleRegister(); |
| InstructionOperand* right_double_operand = g.TempDoubleRegister(); |
| InstructionOperand* result_double_operand = g.TempDoubleRegister(); |
| selector->Emit(f64i32_opcode, left_double_operand, left_operand); |
| selector->Emit(f64i32_opcode, right_double_operand, right_operand); |
| selector->Emit(kArmVdivF64, result_double_operand, left_double_operand, |
| right_double_operand); |
| selector->Emit(i32f64_opcode, result_operand, result_double_operand); |
| } |
| |
| |
| static void VisitDiv(InstructionSelector* selector, Node* node, |
| ArchOpcode div_opcode, ArchOpcode f64i32_opcode, |
| ArchOpcode i32f64_opcode) { |
| ArmOperandGenerator g(selector); |
| Int32BinopMatcher m(node); |
| EmitDiv(selector, div_opcode, f64i32_opcode, i32f64_opcode, |
| g.DefineAsRegister(node), g.UseRegister(m.left().node()), |
| g.UseRegister(m.right().node())); |
| } |
| |
| |
| void InstructionSelector::VisitInt32Div(Node* node) { |
| VisitDiv(this, node, kArmSdiv, kArmVcvtF64S32, kArmVcvtS32F64); |
| } |
| |
| |
| void InstructionSelector::VisitInt32UDiv(Node* node) { |
| VisitDiv(this, node, kArmUdiv, kArmVcvtF64U32, kArmVcvtU32F64); |
| } |
| |
| |
| static void VisitMod(InstructionSelector* selector, Node* node, |
| ArchOpcode div_opcode, ArchOpcode f64i32_opcode, |
| ArchOpcode i32f64_opcode) { |
| ArmOperandGenerator g(selector); |
| Int32BinopMatcher m(node); |
| InstructionOperand* div_operand = g.TempRegister(); |
| InstructionOperand* result_operand = g.DefineAsRegister(node); |
| InstructionOperand* left_operand = g.UseRegister(m.left().node()); |
| InstructionOperand* right_operand = g.UseRegister(m.right().node()); |
| EmitDiv(selector, div_opcode, f64i32_opcode, i32f64_opcode, div_operand, |
| left_operand, right_operand); |
| if (selector->IsSupported(MLS)) { |
| selector->Emit(kArmMls, result_operand, div_operand, right_operand, |
| left_operand); |
| return; |
| } |
| InstructionOperand* mul_operand = g.TempRegister(); |
| selector->Emit(kArmMul, mul_operand, div_operand, right_operand); |
| selector->Emit(kArmSub, result_operand, left_operand, mul_operand); |
| } |
| |
| |
| void InstructionSelector::VisitInt32Mod(Node* node) { |
| VisitMod(this, node, kArmSdiv, kArmVcvtF64S32, kArmVcvtS32F64); |
| } |
| |
| |
| void InstructionSelector::VisitInt32UMod(Node* node) { |
| VisitMod(this, node, kArmUdiv, kArmVcvtF64U32, kArmVcvtU32F64); |
| } |
| |
| |
| void InstructionSelector::VisitChangeInt32ToFloat64(Node* node) { |
| ArmOperandGenerator g(this); |
| Emit(kArmVcvtF64S32, g.DefineAsDoubleRegister(node), |
| g.UseRegister(node->InputAt(0))); |
| } |
| |
| |
| void InstructionSelector::VisitChangeUint32ToFloat64(Node* node) { |
| ArmOperandGenerator g(this); |
| Emit(kArmVcvtF64U32, g.DefineAsDoubleRegister(node), |
| g.UseRegister(node->InputAt(0))); |
| } |
| |
| |
| void InstructionSelector::VisitChangeFloat64ToInt32(Node* node) { |
| ArmOperandGenerator g(this); |
| Emit(kArmVcvtS32F64, g.DefineAsRegister(node), |
| g.UseDoubleRegister(node->InputAt(0))); |
| } |
| |
| |
| void InstructionSelector::VisitChangeFloat64ToUint32(Node* node) { |
| ArmOperandGenerator g(this); |
| Emit(kArmVcvtU32F64, g.DefineAsRegister(node), |
| g.UseDoubleRegister(node->InputAt(0))); |
| } |
| |
| |
| void InstructionSelector::VisitFloat64Add(Node* node) { |
| ArmOperandGenerator g(this); |
| Int32BinopMatcher m(node); |
| if (m.left().IsFloat64Mul() && CanCover(node, m.left().node())) { |
| Int32BinopMatcher mleft(m.left().node()); |
| Emit(kArmVmlaF64, g.DefineSameAsFirst(node), |
| g.UseRegister(m.right().node()), g.UseRegister(mleft.left().node()), |
| g.UseRegister(mleft.right().node())); |
| return; |
| } |
| if (m.right().IsFloat64Mul() && CanCover(node, m.right().node())) { |
| Int32BinopMatcher mright(m.right().node()); |
| Emit(kArmVmlaF64, g.DefineSameAsFirst(node), g.UseRegister(m.left().node()), |
| g.UseRegister(mright.left().node()), |
| g.UseRegister(mright.right().node())); |
| return; |
| } |
| VisitRRRFloat64(this, kArmVaddF64, node); |
| } |
| |
| |
| void InstructionSelector::VisitFloat64Sub(Node* node) { |
| ArmOperandGenerator g(this); |
| Int32BinopMatcher m(node); |
| if (m.right().IsFloat64Mul() && CanCover(node, m.right().node())) { |
| Int32BinopMatcher mright(m.right().node()); |
| Emit(kArmVmlsF64, g.DefineSameAsFirst(node), g.UseRegister(m.left().node()), |
| g.UseRegister(mright.left().node()), |
| g.UseRegister(mright.right().node())); |
| return; |
| } |
| VisitRRRFloat64(this, kArmVsubF64, node); |
| } |
| |
| |
| void InstructionSelector::VisitFloat64Mul(Node* node) { |
| ArmOperandGenerator g(this); |
| Float64BinopMatcher m(node); |
| if (m.right().Is(-1.0)) { |
| Emit(kArmVnegF64, g.DefineAsRegister(node), |
| g.UseDoubleRegister(m.left().node())); |
| } else { |
| VisitRRRFloat64(this, kArmVmulF64, node); |
| } |
| } |
| |
| |
| void InstructionSelector::VisitFloat64Div(Node* node) { |
| VisitRRRFloat64(this, kArmVdivF64, node); |
| } |
| |
| |
| void InstructionSelector::VisitFloat64Mod(Node* node) { |
| ArmOperandGenerator g(this); |
| Emit(kArmVmodF64, g.DefineAsFixedDouble(node, d0), |
| g.UseFixedDouble(node->InputAt(0), d0), |
| g.UseFixedDouble(node->InputAt(1), d1))->MarkAsCall(); |
| } |
| |
| |
| void InstructionSelector::VisitCall(Node* call, BasicBlock* continuation, |
| BasicBlock* deoptimization) { |
| ArmOperandGenerator g(this); |
| CallDescriptor* descriptor = OpParameter<CallDescriptor*>(call); |
| CallBuffer buffer(zone(), descriptor); // TODO(turbofan): temp zone here? |
| |
| // Compute InstructionOperands for inputs and outputs. |
| // TODO(turbofan): on ARM64 it's probably better to use the code object in a |
| // register if there are multiple uses of it. Improve constant pool and the |
| // heuristics in the register allocator for where to emit constants. |
| InitializeCallBuffer(call, &buffer, true, false, continuation, |
| deoptimization); |
| |
| // TODO(dcarney): might be possible to use claim/poke instead |
| // Push any stack arguments. |
| for (int i = buffer.pushed_count - 1; i >= 0; --i) { |
| Node* input = buffer.pushed_nodes[i]; |
| Emit(kArmPush, NULL, g.UseRegister(input)); |
| } |
| |
| // Select the appropriate opcode based on the call type. |
| InstructionCode opcode; |
| switch (descriptor->kind()) { |
| case CallDescriptor::kCallCodeObject: { |
| bool lazy_deopt = descriptor->CanLazilyDeoptimize(); |
| opcode = kArmCallCodeObject | MiscField::encode(lazy_deopt ? 1 : 0); |
| break; |
| } |
| case CallDescriptor::kCallAddress: |
| opcode = kArmCallAddress; |
| break; |
| case CallDescriptor::kCallJSFunction: |
| opcode = kArmCallJSFunction; |
| break; |
| default: |
| UNREACHABLE(); |
| return; |
| } |
| |
| // Emit the call instruction. |
| Instruction* call_instr = |
| Emit(opcode, buffer.output_count, buffer.outputs, |
| buffer.fixed_and_control_count(), buffer.fixed_and_control_args); |
| |
| call_instr->MarkAsCall(); |
| if (deoptimization != NULL) { |
| DCHECK(continuation != NULL); |
| call_instr->MarkAsControl(); |
| } |
| |
| // Caller clean up of stack for C-style calls. |
| if (descriptor->kind() == CallDescriptor::kCallAddress && |
| buffer.pushed_count > 0) { |
| DCHECK(deoptimization == NULL && continuation == NULL); |
| Emit(kArmDrop | MiscField::encode(buffer.pushed_count), NULL); |
| } |
| } |
| |
| |
| void InstructionSelector::VisitInt32AddWithOverflow(Node* node, |
| FlagsContinuation* cont) { |
| VisitBinop(this, node, kArmAdd, kArmAdd, cont); |
| } |
| |
| |
| void InstructionSelector::VisitInt32SubWithOverflow(Node* node, |
| FlagsContinuation* cont) { |
| VisitBinop(this, node, kArmSub, kArmRsb, cont); |
| } |
| |
| |
| // Shared routine for multiple compare operations. |
| static void VisitWordCompare(InstructionSelector* selector, Node* node, |
| InstructionCode opcode, FlagsContinuation* cont, |
| bool commutative) { |
| ArmOperandGenerator g(selector); |
| Int32BinopMatcher m(node); |
| InstructionOperand* inputs[5]; |
| size_t input_count = 0; |
| InstructionOperand* outputs[1]; |
| size_t output_count = 0; |
| |
| if (TryMatchImmediateOrShift(selector, &opcode, m.right().node(), |
| &input_count, &inputs[1])) { |
| inputs[0] = g.UseRegister(m.left().node()); |
| input_count++; |
| } else if (TryMatchImmediateOrShift(selector, &opcode, m.left().node(), |
| &input_count, &inputs[1])) { |
| if (!commutative) cont->Commute(); |
| inputs[0] = g.UseRegister(m.right().node()); |
| input_count++; |
| } else { |
| opcode |= AddressingModeField::encode(kMode_Operand2_R); |
| inputs[input_count++] = g.UseRegister(m.left().node()); |
| inputs[input_count++] = g.UseRegister(m.right().node()); |
| } |
| |
| if (cont->IsBranch()) { |
| inputs[input_count++] = g.Label(cont->true_block()); |
| inputs[input_count++] = g.Label(cont->false_block()); |
| } else { |
| DCHECK(cont->IsSet()); |
| outputs[output_count++] = g.DefineAsRegister(cont->result()); |
| } |
| |
| DCHECK_NE(0, input_count); |
| DCHECK_GE(ARRAY_SIZE(inputs), input_count); |
| DCHECK_GE(ARRAY_SIZE(outputs), output_count); |
| |
| Instruction* instr = selector->Emit(cont->Encode(opcode), output_count, |
| outputs, input_count, inputs); |
| if (cont->IsBranch()) instr->MarkAsControl(); |
| } |
| |
| |
| void InstructionSelector::VisitWord32Test(Node* node, FlagsContinuation* cont) { |
| switch (node->opcode()) { |
| case IrOpcode::kInt32Add: |
| return VisitWordCompare(this, node, kArmCmn, cont, true); |
| case IrOpcode::kInt32Sub: |
| return VisitWordCompare(this, node, kArmCmp, cont, false); |
| case IrOpcode::kWord32And: |
| return VisitWordCompare(this, node, kArmTst, cont, true); |
| case IrOpcode::kWord32Or: |
| return VisitBinop(this, node, kArmOrr, kArmOrr, cont); |
| case IrOpcode::kWord32Xor: |
| return VisitWordCompare(this, node, kArmTeq, cont, true); |
| default: |
| break; |
| } |
| |
| ArmOperandGenerator g(this); |
| InstructionCode opcode = |
| cont->Encode(kArmTst) | AddressingModeField::encode(kMode_Operand2_R); |
| if (cont->IsBranch()) { |
| Emit(opcode, NULL, g.UseRegister(node), g.UseRegister(node), |
| g.Label(cont->true_block()), |
| g.Label(cont->false_block()))->MarkAsControl(); |
| } else { |
| Emit(opcode, g.DefineAsRegister(cont->result()), g.UseRegister(node), |
| g.UseRegister(node)); |
| } |
| } |
| |
| |
| void InstructionSelector::VisitWord32Compare(Node* node, |
| FlagsContinuation* cont) { |
| VisitWordCompare(this, node, kArmCmp, cont, false); |
| } |
| |
| |
| void InstructionSelector::VisitFloat64Compare(Node* node, |
| FlagsContinuation* cont) { |
| ArmOperandGenerator g(this); |
| Float64BinopMatcher m(node); |
| if (cont->IsBranch()) { |
| Emit(cont->Encode(kArmVcmpF64), NULL, g.UseDoubleRegister(m.left().node()), |
| g.UseDoubleRegister(m.right().node()), g.Label(cont->true_block()), |
| g.Label(cont->false_block()))->MarkAsControl(); |
| } else { |
| DCHECK(cont->IsSet()); |
| Emit(cont->Encode(kArmVcmpF64), g.DefineAsRegister(cont->result()), |
| g.UseDoubleRegister(m.left().node()), |
| g.UseDoubleRegister(m.right().node())); |
| } |
| } |
| |
| } // namespace compiler |
| } // namespace internal |
| } // namespace v8 |
