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%def bincmp(condition=""):
/*
* Generic two-operand compare-and-branch operation. Provide a "condition"
* fragment that specifies the comparison to perform.
*
* For: if-eq, if-ne, if-lt, if-ge, if-gt, if-le
*/
/* if-cmp vA, vB, +CCCC */
mov r1, rINST, lsr #12 @ r1<- B
ubfx r0, rINST, #8, #4 @ r0<- A
GET_VREG r3, r1 @ r3<- vB
GET_VREG r0, r0 @ r0<- vA
FETCH_S rINST, 1 @ rINST<- branch offset, in code units
cmp r0, r3 @ compare (vA, vB)
b${condition} MterpCommonTakenBranchNoFlags
cmp rPROFILE, #JIT_CHECK_OSR @ possible OSR re-entry?
beq .L_check_not_taken_osr
FETCH_ADVANCE_INST 2
GET_INST_OPCODE ip @ extract opcode from rINST
GOTO_OPCODE ip @ jump to next instruction
%def zcmp(condition=""):
/*
* Generic one-operand compare-and-branch operation. Provide a "condition"
* fragment that specifies the comparison to perform.
*
* for: if-eqz, if-nez, if-ltz, if-gez, if-gtz, if-lez
*/
/* if-cmp vAA, +BBBB */
mov r0, rINST, lsr #8 @ r0<- AA
GET_VREG r0, r0 @ r0<- vAA
FETCH_S rINST, 1 @ rINST<- branch offset, in code units
cmp r0, #0 @ compare (vA, 0)
b${condition} MterpCommonTakenBranchNoFlags
cmp rPROFILE, #JIT_CHECK_OSR @ possible OSR re-entry?
beq .L_check_not_taken_osr
FETCH_ADVANCE_INST 2
GET_INST_OPCODE ip @ extract opcode from rINST
GOTO_OPCODE ip @ jump to next instruction
%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 */
sbfx rINST, rINST, #8, #8 @ rINST<- ssssssAA (sign-extended)
b MterpCommonTakenBranchNoFlags
%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 */
FETCH_S rINST, 1 @ rINST<- ssssAAAA (sign-extended)
b MterpCommonTakenBranchNoFlags
%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 */
FETCH r0, 1 @ r0<- aaaa (lo)
FETCH r3, 2 @ r1<- AAAA (hi)
orrs rINST, r0, r3, lsl #16 @ rINST<- AAAAaaaa
b MterpCommonTakenBranch
%def op_if_eq():
% bincmp(condition="eq")
%def op_if_eqz():
% zcmp(condition="eq")
%def op_if_ge():
% bincmp(condition="ge")
%def op_if_gez():
% zcmp(condition="ge")
%def op_if_gt():
% bincmp(condition="gt")
%def op_if_gtz():
% zcmp(condition="gt")
%def op_if_le():
% bincmp(condition="le")
%def op_if_lez():
% zcmp(condition="le")
%def op_if_lt():
% bincmp(condition="lt")
%def op_if_ltz():
% zcmp(condition="lt")
%def op_if_ne():
% bincmp(condition="ne")
%def op_if_nez():
% zcmp(condition="ne")
%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 */
FETCH r0, 1 @ r0<- bbbb (lo)
FETCH r1, 2 @ r1<- BBBB (hi)
mov r3, rINST, lsr #8 @ r3<- AA
orr r0, r0, r1, lsl #16 @ r0<- BBBBbbbb
GET_VREG r1, r3 @ r1<- vAA
add r0, rPC, r0, lsl #1 @ r0<- PC + BBBBbbbb*2
bl $func @ r0<- code-unit branch offset
movs rINST, r0
b MterpCommonTakenBranch
%def op_return():
/*
* Return a 32-bit value.
*
* for: return, return-object
*/
/* op vAA */
.extern MterpThreadFenceForConstructor
bl MterpThreadFenceForConstructor
ldr lr, [rSELF, #THREAD_FLAGS_OFFSET]
mov r0, rSELF
ands lr, #THREAD_SUSPEND_OR_CHECKPOINT_REQUEST
blne MterpSuspendCheck @ (self)
mov r2, rINST, lsr #8 @ r2<- AA
GET_VREG r0, r2 @ r0<- vAA
mov r1, #0
b MterpReturn
%def op_return_object():
% op_return()
%def op_return_void():
.extern MterpThreadFenceForConstructor
bl MterpThreadFenceForConstructor
ldr lr, [rSELF, #THREAD_FLAGS_OFFSET]
mov r0, rSELF
ands lr, #THREAD_SUSPEND_OR_CHECKPOINT_REQUEST
blne MterpSuspendCheck @ (self)
mov r0, #0
mov r1, #0
b MterpReturn
%def op_return_wide():
/*
* Return a 64-bit value.
*/
/* return-wide vAA */
.extern MterpThreadFenceForConstructor
bl MterpThreadFenceForConstructor
ldr lr, [rSELF, #THREAD_FLAGS_OFFSET]
mov r0, rSELF
ands lr, #THREAD_SUSPEND_OR_CHECKPOINT_REQUEST
blne MterpSuspendCheck @ (self)
mov r2, rINST, lsr #8 @ r2<- AA
VREG_INDEX_TO_ADDR r2, r2 @ r2<- &fp[AA]
GET_VREG_WIDE_BY_ADDR r0, r1, r2 @ r0/r1 <- vAA/vAA+1
b 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
mov r2, rINST, lsr #8 @ r2<- AA
GET_VREG r1, r2 @ r1<- vAA (exception object)
cmp r1, #0 @ null object?
beq common_errNullObject @ yes, throw an NPE instead
str r1, [rSELF, #THREAD_EXCEPTION_OFFSET] @ thread->exception<- obj
b MterpException
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