| %def header(): |
| /* |
| * Copyright (C) 2016 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| /* |
| Art assembly interpreter notes: |
| |
| First validate assembly code by implementing ExecuteXXXImpl() style body (doesn't |
| handle invoke, allows higher-level code to create frame & shadow frame. |
| |
| Once that's working, support direct entry code & eliminate shadow frame (and |
| excess locals allocation. |
| |
| Some (hopefully) temporary ugliness. We'll treat rFP as pointing to the |
| base of the vreg array within the shadow frame. Access the other fields, |
| dex_pc_, method_ and number_of_vregs_ via negative offsets. For now, we'll continue |
| the shadow frame mechanism of double-storing object references - via rFP & |
| number_of_vregs_. |
| |
| */ |
| |
| /* |
| x86_64 ABI general notes: |
| |
| Caller save set: |
| rax, rdx, rcx, rsi, rdi, r8-r11, st(0)-st(7) |
| Callee save set: |
| rbx, rbp, r12-r15 |
| Return regs: |
| 32-bit in eax |
| 64-bit in rax |
| fp on xmm0 |
| |
| First 8 fp parameters came in xmm0-xmm7. |
| First 6 non-fp parameters came in rdi, rsi, rdx, rcx, r8, r9. |
| Other parameters passed on stack, pushed right-to-left. On entry to target, first |
| param is at 8(%esp). Traditional entry code is: |
| |
| Stack must be 16-byte aligned to support SSE in native code. |
| |
| If we're not doing variable stack allocation (alloca), the frame pointer can be |
| eliminated and all arg references adjusted to be esp relative. |
| */ |
| |
| /* |
| Mterp and x86_64 notes: |
| |
| Some key interpreter variables will be assigned to registers. |
| |
| nick reg purpose |
| rPROFILE rbp countdown register for jit profiling |
| rPC r12 interpreted program counter, used for fetching instructions |
| rFP r13 interpreted frame pointer, used for accessing locals and args |
| rINSTw bx first 16-bit code of current instruction |
| rINSTbl bl opcode portion of instruction word |
| rINSTbh bh high byte of inst word, usually contains src/tgt reg names |
| rIBASE r14 base of instruction handler table |
| rREFS r15 base of object references in shadow frame. |
| |
| Notes: |
| o High order 16 bits of ebx must be zero on entry to handler |
| o rPC, rFP, rINSTw/rINSTbl valid on handler entry and exit |
| o eax and ecx are scratch, rINSTw/ebx sometimes scratch |
| |
| Macros are provided for common operations. Each macro MUST emit only |
| one instruction to make instruction-counting easier. They MUST NOT alter |
| unspecified registers or condition codes. |
| */ |
| |
| /* |
| * This is a #include, not a %include, because we want the C pre-processor |
| * to expand the macros into assembler assignment statements. |
| */ |
| #include "asm_support.h" |
| #include "interpreter/cfi_asm_support.h" |
| |
| #define LITERAL(value) $$(value) |
| |
| /* |
| * Handle mac compiler specific |
| */ |
| #if defined(__APPLE__) |
| #define MACRO_LITERAL(value) $$(value) |
| #define FUNCTION_TYPE(name) |
| #define OBJECT_TYPE(name) |
| #define SIZE(start,end) |
| // Mac OS' symbols have an _ prefix. |
| #define SYMBOL(name) _ ## name |
| #define ASM_HIDDEN .private_extern |
| #else |
| #define MACRO_LITERAL(value) $$value |
| #define FUNCTION_TYPE(name) .type name, @function |
| #define OBJECT_TYPE(name) .type name, @object |
| #define SIZE(start,end) .size start, .-end |
| #define SYMBOL(name) name |
| #define ASM_HIDDEN .hidden |
| #endif |
| |
| .macro PUSH _reg |
| pushq \_reg |
| .cfi_adjust_cfa_offset 8 |
| .cfi_rel_offset \_reg, 0 |
| .endm |
| |
| .macro POP _reg |
| popq \_reg |
| .cfi_adjust_cfa_offset -8 |
| .cfi_restore \_reg |
| .endm |
| |
| /* |
| * Instead of holding a pointer to the shadow frame, we keep rFP at the base of the vregs. So, |
| * to access other shadow frame fields, we need to use a backwards offset. Define those here. |
| */ |
| #define OFF_FP(a) (a - SHADOWFRAME_VREGS_OFFSET) |
| #define OFF_FP_NUMBER_OF_VREGS OFF_FP(SHADOWFRAME_NUMBER_OF_VREGS_OFFSET) |
| #define OFF_FP_DEX_PC OFF_FP(SHADOWFRAME_DEX_PC_OFFSET) |
| #define OFF_FP_LINK OFF_FP(SHADOWFRAME_LINK_OFFSET) |
| #define OFF_FP_METHOD OFF_FP(SHADOWFRAME_METHOD_OFFSET) |
| #define OFF_FP_RESULT_REGISTER OFF_FP(SHADOWFRAME_RESULT_REGISTER_OFFSET) |
| #define OFF_FP_DEX_PC_PTR OFF_FP(SHADOWFRAME_DEX_PC_PTR_OFFSET) |
| #define OFF_FP_DEX_INSTRUCTIONS OFF_FP(SHADOWFRAME_DEX_INSTRUCTIONS_OFFSET) |
| #define OFF_FP_COUNTDOWN_OFFSET OFF_FP(SHADOWFRAME_HOTNESS_COUNTDOWN_OFFSET) |
| #define OFF_FP_SHADOWFRAME (-SHADOWFRAME_VREGS_OFFSET) |
| |
| /* Frame size must be 16-byte aligned. |
| * Remember about 8 bytes for return address + 6 * 8 for spills. |
| */ |
| #define FRAME_SIZE 8 |
| |
| /* Frame diagram while executing ExecuteMterpImpl, high to low addresses */ |
| #define IN_ARG3 %rcx |
| #define IN_ARG2 %rdx |
| #define IN_ARG1 %rsi |
| #define IN_ARG0 %rdi |
| /* Spill offsets relative to %esp */ |
| #define SELF_SPILL (FRAME_SIZE - 8) |
| /* Out Args */ |
| #define OUT_ARG3 %rcx |
| #define OUT_ARG2 %rdx |
| #define OUT_ARG1 %rsi |
| #define OUT_ARG0 %rdi |
| #define OUT_32_ARG3 %ecx |
| #define OUT_32_ARG2 %edx |
| #define OUT_32_ARG1 %esi |
| #define OUT_32_ARG0 %edi |
| #define OUT_FP_ARG1 %xmm1 |
| #define OUT_FP_ARG0 %xmm0 |
| |
| /* During bringup, we'll use the shadow frame model instead of rFP */ |
| /* single-purpose registers, given names for clarity */ |
| #define rSELF SELF_SPILL(%rsp) |
| #define rPC %r12 |
| #define CFI_DEX 12 // DWARF register number of the register holding dex-pc (rPC). |
| #define CFI_TMP 5 // DWARF register number of the first argument register (rdi). |
| #define rFP %r13 |
| #define rINST %ebx |
| #define rINSTq %rbx |
| #define rINSTw %bx |
| #define rINSTbh %bh |
| #define rINSTbl %bl |
| #define rIBASE %r14 |
| #define rREFS %r15 |
| #define rPROFILE %ebp |
| |
| #define MTERP_LOGGING 0 |
| |
| /* |
| * "export" the PC to dex_pc field in the shadow frame, f/b/o future exception objects. Must |
| * be done *before* something throws. |
| * |
| * It's okay to do this more than once. |
| * |
| * NOTE: the fast interpreter keeps track of dex pc as a direct pointer to the mapped |
| * dex byte codes. However, the rest of the runtime expects dex pc to be an instruction |
| * offset into the code_items_[] array. For effiency, we will "export" the |
| * current dex pc as a direct pointer using the EXPORT_PC macro, and rely on GetDexPC |
| * to convert to a dex pc when needed. |
| */ |
| .macro EXPORT_PC |
| movq rPC, OFF_FP_DEX_PC_PTR(rFP) |
| .endm |
| |
| /* |
| * Refresh handler table. |
| * IBase handles uses the caller save register so we must restore it after each call. |
| * Also it is used as a result of some 64-bit operations (like imul) and we should |
| * restore it in such cases also. |
| * |
| */ |
| .macro REFRESH_IBASE_REG self_reg |
| movq THREAD_CURRENT_IBASE_OFFSET(\self_reg), rIBASE |
| .endm |
| .macro REFRESH_IBASE |
| movq rSELF, rIBASE |
| REFRESH_IBASE_REG rIBASE |
| .endm |
| |
| /* |
| * Refresh rINST. |
| * At enter to handler rINST does not contain the opcode number. |
| * However some utilities require the full value, so this macro |
| * restores the opcode number. |
| */ |
| .macro REFRESH_INST _opnum |
| movb rINSTbl, rINSTbh |
| movb $$\_opnum, rINSTbl |
| .endm |
| |
| /* |
| * Fetch the next instruction from rPC into rINSTw. Does not advance rPC. |
| */ |
| .macro FETCH_INST |
| movzwq (rPC), rINSTq |
| .endm |
| |
| /* |
| * Remove opcode from rINST, compute the address of handler and jump to it. |
| */ |
| .macro GOTO_NEXT |
| movzx rINSTbl,%eax |
| movzbl rINSTbh,rINST |
| shll MACRO_LITERAL(${handler_size_bits}), %eax |
| addq rIBASE, %rax |
| jmp *%rax |
| .endm |
| |
| /* |
| * Advance rPC by instruction count. |
| */ |
| .macro ADVANCE_PC _count |
| leaq 2*\_count(rPC), rPC |
| .endm |
| |
| /* |
| * Advance rPC by instruction count, fetch instruction and jump to handler. |
| */ |
| .macro ADVANCE_PC_FETCH_AND_GOTO_NEXT _count |
| ADVANCE_PC \_count |
| FETCH_INST |
| GOTO_NEXT |
| .endm |
| |
| /* |
| * Get/set the 32-bit value from a Dalvik register. |
| */ |
| #define VREG_ADDRESS(_vreg) (rFP,_vreg,4) |
| #define VREG_HIGH_ADDRESS(_vreg) 4(rFP,_vreg,4) |
| #define VREG_REF_ADDRESS(_vreg) (rREFS,_vreg,4) |
| #define VREG_REF_HIGH_ADDRESS(_vreg) 4(rREFS,_vreg,4) |
| |
| .macro GET_VREG _reg _vreg |
| movl VREG_ADDRESS(\_vreg), \_reg |
| .endm |
| |
| /* Read wide value. */ |
| .macro GET_WIDE_VREG _reg _vreg |
| movq VREG_ADDRESS(\_vreg), \_reg |
| .endm |
| |
| .macro SET_VREG _reg _vreg |
| movl \_reg, VREG_ADDRESS(\_vreg) |
| movl MACRO_LITERAL(0), VREG_REF_ADDRESS(\_vreg) |
| .endm |
| |
| /* Write wide value. reg is clobbered. */ |
| .macro SET_WIDE_VREG _reg _vreg |
| movq \_reg, VREG_ADDRESS(\_vreg) |
| xorq \_reg, \_reg |
| movq \_reg, VREG_REF_ADDRESS(\_vreg) |
| .endm |
| |
| .macro SET_VREG_OBJECT _reg _vreg |
| movl \_reg, VREG_ADDRESS(\_vreg) |
| movl \_reg, VREG_REF_ADDRESS(\_vreg) |
| .endm |
| |
| .macro GET_VREG_HIGH _reg _vreg |
| movl VREG_HIGH_ADDRESS(\_vreg), \_reg |
| .endm |
| |
| .macro SET_VREG_HIGH _reg _vreg |
| movl \_reg, VREG_HIGH_ADDRESS(\_vreg) |
| movl MACRO_LITERAL(0), VREG_REF_HIGH_ADDRESS(\_vreg) |
| .endm |
| |
| .macro CLEAR_REF _vreg |
| movl MACRO_LITERAL(0), VREG_REF_ADDRESS(\_vreg) |
| .endm |
| |
| .macro CLEAR_WIDE_REF _vreg |
| movl MACRO_LITERAL(0), VREG_REF_ADDRESS(\_vreg) |
| movl MACRO_LITERAL(0), VREG_REF_HIGH_ADDRESS(\_vreg) |
| .endm |
| |
| /* |
| * function support macros. |
| */ |
| .macro ENTRY name |
| .text |
| ASM_HIDDEN SYMBOL(\name) |
| .global SYMBOL(\name) |
| FUNCTION_TYPE(\name) |
| SYMBOL(\name): |
| .endm |
| |
| .macro END name |
| SIZE(\name,\name) |
| .endm |
| |
| %def entry(): |
| /* |
| * Copyright (C) 2016 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| /* |
| * Interpreter entry point. |
| * |
| * On entry: |
| * 0 Thread* self |
| * 1 insns_ |
| * 2 ShadowFrame |
| * 3 JValue* result_register |
| * |
| */ |
| |
| ENTRY ExecuteMterpImpl |
| .cfi_startproc |
| .cfi_def_cfa rsp, 8 |
| |
| /* Spill callee save regs */ |
| PUSH %rbx |
| PUSH %rbp |
| PUSH %r12 |
| PUSH %r13 |
| PUSH %r14 |
| PUSH %r15 |
| |
| /* Allocate frame */ |
| subq $$FRAME_SIZE, %rsp |
| .cfi_adjust_cfa_offset FRAME_SIZE |
| |
| /* Remember the return register */ |
| movq IN_ARG3, SHADOWFRAME_RESULT_REGISTER_OFFSET(IN_ARG2) |
| |
| /* Remember the code_item */ |
| movq IN_ARG1, SHADOWFRAME_DEX_INSTRUCTIONS_OFFSET(IN_ARG2) |
| |
| /* set up "named" registers */ |
| movl SHADOWFRAME_NUMBER_OF_VREGS_OFFSET(IN_ARG2), %eax |
| leaq SHADOWFRAME_VREGS_OFFSET(IN_ARG2), rFP |
| leaq (rFP, %rax, 4), rREFS |
| movl SHADOWFRAME_DEX_PC_OFFSET(IN_ARG2), %eax |
| leaq (IN_ARG1, %rax, 2), rPC |
| CFI_DEFINE_DEX_PC_WITH_OFFSET(CFI_TMP, CFI_DEX, 0) |
| EXPORT_PC |
| |
| /* Starting ibase */ |
| movq IN_ARG0, rSELF |
| REFRESH_IBASE_REG IN_ARG0 |
| |
| /* Set up for backwards branches & osr profiling */ |
| movq IN_ARG0, OUT_ARG2 /* Set up OUT_ARG2 before clobbering IN_ARG0 */ |
| movq OFF_FP_METHOD(rFP), OUT_ARG0 |
| leaq OFF_FP_SHADOWFRAME(rFP), OUT_ARG1 |
| call SYMBOL(MterpSetUpHotnessCountdown) |
| movswl %ax, rPROFILE |
| |
| /* start executing the instruction at rPC */ |
| FETCH_INST |
| GOTO_NEXT |
| /* NOTE: no fallthrough */ |
| // cfi info continues, and covers the whole mterp implementation. |
| END ExecuteMterpImpl |
| |
| %def dchecks_before_helper(): |
| // Call C++ to do debug checks and return to the handler using tail call. |
| .extern MterpCheckBefore |
| popq %rax # Return address (the instuction handler). |
| REFRESH_IBASE |
| movq rSELF, OUT_ARG0 |
| leaq OFF_FP_SHADOWFRAME(rFP), OUT_ARG1 |
| movq rPC, OUT_ARG2 |
| pushq %rax # Return address for the tail call. |
| jmp SYMBOL(MterpCheckBefore) # (self, shadow_frame, dex_pc_ptr) |
| |
| %def opcode_pre(): |
| % add_helper(dchecks_before_helper, "Mterp_dchecks_before_helper") |
| #if !defined(NDEBUG) |
| call SYMBOL(Mterp_dchecks_before_helper) |
| #endif |
| |
| %def fallback(): |
| /* Transfer stub to alternate interpreter */ |
| jmp MterpFallback |
| |
| |
| %def helpers(): |
| ENTRY MterpHelpers |
| |
| %def footer(): |
| /* |
| * =========================================================================== |
| * Common subroutines and data |
| * =========================================================================== |
| */ |
| |
| .text |
| .align 2 |
| |
| /* |
| * We've detected a condition that will result in an exception, but the exception |
| * has not yet been thrown. Just bail out to the reference interpreter to deal with it. |
| * TUNING: for consistency, we may want to just go ahead and handle these here. |
| */ |
| common_errDivideByZero: |
| EXPORT_PC |
| #if MTERP_LOGGING |
| movq rSELF, OUT_ARG0 |
| leaq OFF_FP_SHADOWFRAME(rFP), OUT_ARG1 |
| call SYMBOL(MterpLogDivideByZeroException) |
| #endif |
| jmp MterpCommonFallback |
| |
| common_errArrayIndex: |
| EXPORT_PC |
| #if MTERP_LOGGING |
| movq rSELF, OUT_ARG0 |
| leaq OFF_FP_SHADOWFRAME(rFP), OUT_ARG1 |
| call SYMBOL(MterpLogArrayIndexException) |
| #endif |
| jmp MterpCommonFallback |
| |
| common_errNegativeArraySize: |
| EXPORT_PC |
| #if MTERP_LOGGING |
| movq rSELF, OUT_ARG0 |
| leaq OFF_FP_SHADOWFRAME(rFP), OUT_ARG1 |
| call SYMBOL(MterpLogNegativeArraySizeException) |
| #endif |
| jmp MterpCommonFallback |
| |
| common_errNoSuchMethod: |
| EXPORT_PC |
| #if MTERP_LOGGING |
| movq rSELF, OUT_ARG0 |
| leaq OFF_FP_SHADOWFRAME(rFP), OUT_ARG1 |
| call SYMBOL(MterpLogNoSuchMethodException) |
| #endif |
| jmp MterpCommonFallback |
| |
| common_errNullObject: |
| EXPORT_PC |
| #if MTERP_LOGGING |
| movq rSELF, OUT_ARG0 |
| leaq OFF_FP_SHADOWFRAME(rFP), OUT_ARG1 |
| call SYMBOL(MterpLogNullObjectException) |
| #endif |
| jmp MterpCommonFallback |
| |
| common_exceptionThrown: |
| EXPORT_PC |
| #if MTERP_LOGGING |
| movq rSELF, OUT_ARG0 |
| leaq OFF_FP_SHADOWFRAME(rFP), OUT_ARG1 |
| call SYMBOL(MterpLogExceptionThrownException) |
| #endif |
| jmp MterpCommonFallback |
| |
| MterpSuspendFallback: |
| EXPORT_PC |
| #if MTERP_LOGGING |
| movq rSELF, OUT_ARG0 |
| leaq OFF_FP_SHADOWFRAME(rFP), OUT_ARG1 |
| movl THREAD_FLAGS_OFFSET(OUT_ARG0), OUT_32_ARG2 |
| call SYMBOL(MterpLogSuspendFallback) |
| #endif |
| jmp MterpCommonFallback |
| |
| /* |
| * If we're here, something is out of the ordinary. If there is a pending |
| * exception, handle it. Otherwise, roll back and retry with the reference |
| * interpreter. |
| */ |
| MterpPossibleException: |
| movq rSELF, %rcx |
| cmpq $$0, THREAD_EXCEPTION_OFFSET(%rcx) |
| jz MterpFallback |
| /* intentional fallthrough - handle pending exception. */ |
| |
| /* |
| * On return from a runtime helper routine, we've found a pending exception. |
| * Can we handle it here - or need to bail out to caller? |
| * |
| */ |
| MterpException: |
| movq rSELF, OUT_ARG0 |
| leaq OFF_FP_SHADOWFRAME(rFP), OUT_ARG1 |
| call SYMBOL(MterpHandleException) |
| testb %al, %al |
| jz MterpExceptionReturn |
| movq OFF_FP_DEX_INSTRUCTIONS(rFP), %rax |
| mov OFF_FP_DEX_PC(rFP), %ecx |
| leaq (%rax, %rcx, 2), rPC |
| movq rPC, OFF_FP_DEX_PC_PTR(rFP) |
| /* Do we need to switch interpreters? */ |
| movq rSELF, %rax |
| cmpb LITERAL(0), THREAD_USE_MTERP_OFFSET(%rax) |
| jz MterpFallback |
| /* resume execution at catch block */ |
| REFRESH_IBASE |
| FETCH_INST |
| GOTO_NEXT |
| /* NOTE: no fallthrough */ |
| |
| /* |
| * Common handling for branches with support for Jit profiling. |
| * On entry: |
| * rINST <= signed offset |
| * rPROFILE <= signed hotness countdown (expanded to 32 bits) |
| * condition bits <= set to establish sign of offset (use "NoFlags" entry if not) |
| * |
| * We have quite a few different cases for branch profiling, OSR detection and |
| * suspend check support here. |
| * |
| * Taken backward branches: |
| * If profiling active, do hotness countdown and report if we hit zero. |
| * If in osr check mode, see if our target is a compiled loop header entry and do OSR if so. |
| * Is there a pending suspend request? If so, suspend. |
| * |
| * Taken forward branches and not-taken backward branches: |
| * If in osr check mode, see if our target is a compiled loop header entry and do OSR if so. |
| * |
| * Our most common case is expected to be a taken backward branch with active jit profiling, |
| * but no full OSR check and no pending suspend request. |
| * Next most common case is not-taken branch with no full OSR check. |
| * |
| */ |
| MterpCommonTakenBranch: |
| jg .L_forward_branch # don't add forward branches to hotness |
| /* |
| * We need to subtract 1 from positive values and we should not see 0 here, |
| * so we may use the result of the comparison with -1. |
| */ |
| #if JIT_CHECK_OSR != -1 |
| # error "JIT_CHECK_OSR must be -1." |
| #endif |
| cmpl $$JIT_CHECK_OSR, rPROFILE |
| je .L_osr_check |
| decl rPROFILE |
| je .L_add_batch # counted down to zero - report |
| .L_resume_backward_branch: |
| movq rSELF, %rax |
| testl $$(THREAD_SUSPEND_OR_CHECKPOINT_REQUEST), THREAD_FLAGS_OFFSET(%rax) |
| REFRESH_IBASE_REG %rax |
| leaq (rPC, rINSTq, 2), rPC |
| FETCH_INST |
| jnz .L_suspend_request_pending |
| GOTO_NEXT |
| |
| .L_suspend_request_pending: |
| EXPORT_PC |
| movq rSELF, OUT_ARG0 |
| call SYMBOL(MterpSuspendCheck) # (self) |
| testb %al, %al |
| jnz MterpFallback |
| REFRESH_IBASE # might have changed during suspend |
| GOTO_NEXT |
| |
| .L_no_count_backwards: |
| cmpl $$JIT_CHECK_OSR, rPROFILE # possible OSR re-entry? |
| jne .L_resume_backward_branch |
| .L_osr_check: |
| EXPORT_PC |
| movq rSELF, OUT_ARG0 |
| leaq OFF_FP_SHADOWFRAME(rFP), OUT_ARG1 |
| movq rINSTq, OUT_ARG2 |
| call SYMBOL(MterpMaybeDoOnStackReplacement) # (self, shadow_frame, offset) |
| testb %al, %al |
| jz .L_resume_backward_branch |
| jmp MterpOnStackReplacement |
| |
| .L_forward_branch: |
| cmpl $$JIT_CHECK_OSR, rPROFILE # possible OSR re-entry? |
| je .L_check_osr_forward |
| .L_resume_forward_branch: |
| leaq (rPC, rINSTq, 2), rPC |
| FETCH_INST |
| GOTO_NEXT |
| |
| .L_check_osr_forward: |
| EXPORT_PC |
| movq rSELF, OUT_ARG0 |
| leaq OFF_FP_SHADOWFRAME(rFP), OUT_ARG1 |
| movq rINSTq, OUT_ARG2 |
| call SYMBOL(MterpMaybeDoOnStackReplacement) # (self, shadow_frame, offset) |
| testb %al, %al |
| jz .L_resume_forward_branch |
| jmp MterpOnStackReplacement |
| |
| .L_add_batch: |
| movl rPROFILE, %eax |
| movq OFF_FP_METHOD(rFP), OUT_ARG0 |
| leaq OFF_FP_SHADOWFRAME(rFP), OUT_ARG1 |
| movw %ax, OFF_FP_COUNTDOWN_OFFSET(rFP) |
| movq rSELF, OUT_ARG2 |
| call SYMBOL(MterpAddHotnessBatch) # (method, shadow_frame, self) |
| movswl %ax, rPROFILE |
| jmp .L_no_count_backwards |
| |
| /* |
| * Entered from the conditional branch handlers when OSR check request active on |
| * not-taken path. All Dalvik not-taken conditional branch offsets are 2. |
| */ |
| .L_check_not_taken_osr: |
| EXPORT_PC |
| movq rSELF, OUT_ARG0 |
| leaq OFF_FP_SHADOWFRAME(rFP), OUT_ARG1 |
| movl $$2, OUT_32_ARG2 |
| call SYMBOL(MterpMaybeDoOnStackReplacement) # (self, shadow_frame, offset) |
| testb %al, %al |
| jnz MterpOnStackReplacement |
| ADVANCE_PC_FETCH_AND_GOTO_NEXT 2 |
| |
| /* |
| * On-stack replacement has happened, and now we've returned from the compiled method. |
| */ |
| MterpOnStackReplacement: |
| #if MTERP_LOGGING |
| movq rSELF, OUT_ARG0 |
| leaq OFF_FP_SHADOWFRAME(rFP), OUT_ARG1 |
| movl rINST, OUT_32_ARG2 |
| call SYMBOL(MterpLogOSR) |
| #endif |
| movl $$1, %eax |
| jmp MterpDone |
| |
| /* |
| * Bail out to reference interpreter. |
| */ |
| MterpFallback: |
| EXPORT_PC |
| #if MTERP_LOGGING |
| movq rSELF, OUT_ARG0 |
| leaq OFF_FP_SHADOWFRAME(rFP), OUT_ARG1 |
| call SYMBOL(MterpLogFallback) |
| #endif |
| MterpCommonFallback: |
| xorl %eax, %eax |
| jmp MterpDone |
| |
| /* |
| * On entry: |
| * uint32_t* rFP (should still be live, pointer to base of vregs) |
| */ |
| MterpExceptionReturn: |
| movl $$1, %eax |
| jmp MterpDone |
| MterpReturn: |
| movq OFF_FP_RESULT_REGISTER(rFP), %rdx |
| movq %rax, (%rdx) |
| movl $$1, %eax |
| MterpDone: |
| /* |
| * At this point, we expect rPROFILE to be non-zero. If negative, hotness is disabled or we're |
| * checking for OSR. If greater than zero, we might have unreported hotness to register |
| * (the difference between the ending rPROFILE and the cached hotness counter). rPROFILE |
| * should only reach zero immediately after a hotness decrement, and is then reset to either |
| * a negative special state or the new non-zero countdown value. |
| */ |
| testl rPROFILE, rPROFILE |
| jle MRestoreFrame # if > 0, we may have some counts to report. |
| |
| movl %eax, rINST # stash return value |
| /* Report cached hotness counts */ |
| movl rPROFILE, %eax |
| movq OFF_FP_METHOD(rFP), OUT_ARG0 |
| leaq OFF_FP_SHADOWFRAME(rFP), OUT_ARG1 |
| movw %ax, OFF_FP_COUNTDOWN_OFFSET(rFP) |
| movq rSELF, OUT_ARG2 |
| call SYMBOL(MterpAddHotnessBatch) # (method, shadow_frame, self) |
| movl rINST, %eax # restore return value |
| |
| /* pop up frame */ |
| MRestoreFrame: |
| addq $$FRAME_SIZE, %rsp |
| .cfi_adjust_cfa_offset -FRAME_SIZE |
| |
| /* Restore callee save register */ |
| POP %r15 |
| POP %r14 |
| POP %r13 |
| POP %r12 |
| POP %rbp |
| POP %rbx |
| ret |
| .cfi_endproc |
| END MterpHelpers |
| |
| %def instruction_end(): |
| |
| OBJECT_TYPE(artMterpAsmInstructionEnd) |
| ASM_HIDDEN SYMBOL(artMterpAsmInstructionEnd) |
| .global SYMBOL(artMterpAsmInstructionEnd) |
| SYMBOL(artMterpAsmInstructionEnd): |
| |
| %def instruction_start(): |
| |
| OBJECT_TYPE(artMterpAsmInstructionStart) |
| ASM_HIDDEN SYMBOL(artMterpAsmInstructionStart) |
| .global SYMBOL(artMterpAsmInstructionStart) |
| SYMBOL(artMterpAsmInstructionStart) = .L_op_nop |
| .text |
| |
| %def opcode_start(): |
| ENTRY Mterp_${opcode} |
| %def opcode_end(): |
| END Mterp_${opcode} |
| %def helper_start(name): |
| ENTRY ${name} |
| %def helper_end(name): |
| END ${name} |
