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%def bincmp(revcmp=""):
/*
* Generic two-operand compare-and-branch operation. Provide a "revcmp"
* fragment that specifies the *reverse* comparison to perform, e.g.
* for "if-le" you would use "gt".
*
* For: if-eq, if-ne, if-lt, if-ge, if-gt, if-le
*/
/* if-cmp vA, vB, +CCCC */
movzx rINSTbl, %ecx # ecx <- A+
andb $$0xf, %cl # ecx <- A
GET_VREG %eax, %ecx # eax <- vA
sarl $$4, rINST # rINST <- B
cmpl VREG_ADDRESS(rINST), %eax # compare (vA, vB)
j${revcmp} 1f
movswl 2(rPC), rINST # Get signed branch offset
testl rINST, rINST
jmp MterpCommonTakenBranch
1:
cmpw $$JIT_CHECK_OSR, rPROFILE
je .L_check_not_taken_osr
ADVANCE_PC_FETCH_AND_GOTO_NEXT 2
%def zcmp(revcmp=""):
/*
* Generic one-operand compare-and-branch operation. Provide a "revcmp"
* fragment that specifies the *reverse* comparison to perform, e.g.
* for "if-le" you would use "gt".
*
* for: if-eqz, if-nez, if-ltz, if-gez, if-gtz, if-lez
*/
/* if-cmp vAA, +BBBB */
cmpl $$0, VREG_ADDRESS(rINST) # compare (vA, 0)
j${revcmp} 1f
movswl 2(rPC), rINST # fetch signed displacement
testl rINST, rINST
jmp MterpCommonTakenBranch
1:
cmpw $$JIT_CHECK_OSR, rPROFILE
je .L_check_not_taken_osr
ADVANCE_PC_FETCH_AND_GOTO_NEXT 2
%def op_goto():
/*
* Unconditional branch, 8-bit offset.
*
* The branch distance is a signed code-unit offset, which we need to
* double to get a byte offset.
*/
/* goto +AA */
movsbl rINSTbl, rINST # rINST <- ssssssAA
testl rINST, rINST
jmp MterpCommonTakenBranch
%def op_goto_16():
/*
* Unconditional branch, 16-bit offset.
*
* The branch distance is a signed code-unit offset, which we need to
* double to get a byte offset.
*/
/* goto/16 +AAAA */
movswl 2(rPC), rINST # rINST <- ssssAAAA
testl rINST, rINST
jmp MterpCommonTakenBranch
%def op_goto_32():
/*
* Unconditional branch, 32-bit offset.
*
* The branch distance is a signed code-unit offset, which we need to
* double to get a byte offset.
*
* Unlike most opcodes, this one is allowed to branch to itself, so
* our "backward branch" test must be "<=0" instead of "<0". Because
* we need the V bit set, we'll use an adds to convert from Dalvik
* offset to byte offset.
*/
/* goto/32 +AAAAAAAA */
movl 2(rPC), rINST # rINST <- AAAAAAAA
testl rINST, rINST
jmp MterpCommonTakenBranch
%def op_if_eq():
% bincmp(revcmp="ne")
%def op_if_eqz():
% zcmp(revcmp="ne")
%def op_if_ge():
% bincmp(revcmp="l")
%def op_if_gez():
% zcmp(revcmp="l")
%def op_if_gt():
% bincmp(revcmp="le")
%def op_if_gtz():
% zcmp(revcmp="le")
%def op_if_le():
% bincmp(revcmp="g")
%def op_if_lez():
% zcmp(revcmp="g")
%def op_if_lt():
% bincmp(revcmp="ge")
%def op_if_ltz():
% zcmp(revcmp="ge")
%def op_if_ne():
% bincmp(revcmp="e")
%def op_if_nez():
% zcmp(revcmp="e")
%def op_packed_switch(func="MterpDoPackedSwitch"):
/*
* Handle a packed-switch or sparse-switch instruction. In both cases
* we decode it and hand it off to a helper function.
*
* We don't really expect backward branches in a switch statement, but
* they're perfectly legal, so we check for them here.
*
* for: packed-switch, sparse-switch
*/
/* op vAA, +BBBB */
movl 2(rPC), %ecx # ecx <- BBBBbbbb
GET_VREG %eax, rINST # eax <- vAA
leal (rPC,%ecx,2), %ecx # ecx <- PC + BBBBbbbb*2
movl %eax, OUT_ARG1(%esp) # ARG1 <- vAA
movl %ecx, OUT_ARG0(%esp) # ARG0 <- switchData
call SYMBOL($func)
REFRESH_IBASE
testl %eax, %eax
movl %eax, rINST
jmp MterpCommonTakenBranch
%def op_return():
/*
* Return a 32-bit value.
*
* for: return, return-object
*/
/* op vAA */
.extern MterpThreadFenceForConstructor
call SYMBOL(MterpThreadFenceForConstructor)
movl rSELF, %eax
testl $$(THREAD_SUSPEND_OR_CHECKPOINT_REQUEST), THREAD_FLAGS_OFFSET(%eax)
jz 1f
movl %eax, OUT_ARG0(%esp)
call SYMBOL(MterpSuspendCheck)
1:
GET_VREG %eax, rINST # eax <- vAA
xorl %ecx, %ecx
jmp MterpReturn
%def op_return_object():
% op_return()
%def op_return_void():
.extern MterpThreadFenceForConstructor
call SYMBOL(MterpThreadFenceForConstructor)
movl rSELF, %eax
testl $$(THREAD_SUSPEND_OR_CHECKPOINT_REQUEST), THREAD_FLAGS_OFFSET(%eax)
jz 1f
movl %eax, OUT_ARG0(%esp)
call SYMBOL(MterpSuspendCheck)
1:
xorl %eax, %eax
xorl %ecx, %ecx
jmp MterpReturn
%def op_return_wide():
/*
* Return a 64-bit value.
*/
/* return-wide vAA */
.extern MterpThreadFenceForConstructor
call SYMBOL(MterpThreadFenceForConstructor)
movl rSELF, %eax
testl $$(THREAD_SUSPEND_OR_CHECKPOINT_REQUEST), THREAD_FLAGS_OFFSET(%eax)
jz 1f
movl %eax, OUT_ARG0(%esp)
call SYMBOL(MterpSuspendCheck)
1:
GET_VREG %eax, rINST # eax <- v[AA+0]
GET_VREG_HIGH %ecx, rINST # ecx <- v[AA+1]
jmp MterpReturn
%def op_sparse_switch():
% op_packed_switch(func="MterpDoSparseSwitch")
%def op_throw():
/*
* Throw an exception object in the current thread.
*/
/* throw vAA */
EXPORT_PC
GET_VREG %eax, rINST # eax<- vAA (exception object)
testl %eax, %eax
jz common_errNullObject
movl rSELF,%ecx
movl %eax, THREAD_EXCEPTION_OFFSET(%ecx)
jmp MterpException
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