blob: 3cc75321cf4ff1d6f47d588085d6ee4f30c728b7 [file] [log] [blame]
/*
* ===========================================================================
* 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? */
call SYMBOL(MterpShouldSwitchInterpreters)
testb %al, %al
jnz 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
SIZE(ExecuteMterpImpl,ExecuteMterpImpl)