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%def bincmp(condition=""):
/*
* Generic two-operand compare-and-branch operation. Provide a "condition"
* fragment that specifies the comparison to perform, e.g. for
* "if-le" you would use "le".
*
* For: if-eq, if-ne, if-lt, if-ge, if-gt, if-le
*/
/* if-cmp vA, vB, +CCCC */
ext a2, rINST, 8, 4 # a2 <- A
ext a3, rINST, 12, 4 # a3 <- B
lh rINST, 2(rPC) # rINST <- offset (sign-extended CCCC)
GET_VREG a0, a2 # a0 <- vA
GET_VREG a1, a3 # a1 <- vB
b${condition}c a0, a1, MterpCommonTakenBranchNoFlags
li v0, JIT_CHECK_OSR # possible OSR re-entry?
beqc rPROFILE, v0, .L_check_not_taken_osr
FETCH_ADVANCE_INST 2 # advance rPC, load rINST
GET_INST_OPCODE v0 # extract opcode from rINST
GOTO_OPCODE v0 # jump to next instruction
%def zcmp(condition=""):
/*
* Generic one-operand compare-and-branch operation. Provide a "condition"
* fragment that specifies the comparison to perform, e.g. for
* "if-lez" you would use "le".
*
* For: if-eqz, if-nez, if-ltz, if-gez, if-gtz, if-lez
*/
/* if-cmp vAA, +BBBB */
srl a2, rINST, 8 # a2 <- AA
lh rINST, 2(rPC) # rINST <- offset (sign-extended BBBB)
GET_VREG a0, a2 # a0 <- vAA
b${condition}zc a0, MterpCommonTakenBranchNoFlags
li v0, JIT_CHECK_OSR # possible OSR re-entry?
beqc rPROFILE, v0, .L_check_not_taken_osr
FETCH_ADVANCE_INST 2 # advance rPC, load rINST
GET_INST_OPCODE v0 # extract opcode from rINST
GOTO_OPCODE v0 # 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 */
srl rINST, rINST, 8
seb rINST, rINST # rINST <- offset (sign-extended AA)
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 */
lh rINST, 2(rPC) # rINST <- offset (sign-extended AAAA)
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".
*/
/* goto/32 +AAAAAAAA */
lh rINST, 2(rPC) # rINST <- aaaa (low)
lh a1, 4(rPC) # a1 <- AAAA (high)
ins rINST, a1, 16, 16 # rINST <- offset (sign-extended AAAAaaaa)
b MterpCommonTakenBranchNoFlags
%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, +BBBBBBBB */
.extern $func
lh a0, 2(rPC) # a0 <- bbbb (lo)
lh a1, 4(rPC) # a1 <- BBBB (hi)
srl a3, rINST, 8 # a3 <- AA
ins a0, a1, 16, 16 # a0 <- BBBBbbbb
GET_VREG a1, a3 # a1 <- vAA
dlsa a0, a0, rPC, 1 # a0 <- PC + BBBBbbbb*2
jal $func # v0 <- code-unit branch offset
move rINST, v0
b MterpCommonTakenBranchNoFlags
%def op_return(instr="GET_VREG"):
/*
* Return a 32-bit value.
*
* for: return (sign-extend), return-object (zero-extend)
*/
/* op vAA */
.extern MterpThreadFenceForConstructor
.extern MterpSuspendCheck
jal MterpThreadFenceForConstructor
lw ra, THREAD_FLAGS_OFFSET(rSELF)
move a0, rSELF
and ra, ra, THREAD_SUSPEND_OR_CHECKPOINT_REQUEST
beqzc ra, 1f
jal MterpSuspendCheck # (self)
1:
srl a2, rINST, 8 # a2 <- AA
$instr a0, a2 # a0 <- vAA
b MterpReturn
%def op_return_object():
% op_return(instr="GET_VREG_U")
%def op_return_void():
.extern MterpThreadFenceForConstructor
.extern MterpSuspendCheck
jal MterpThreadFenceForConstructor
lw ra, THREAD_FLAGS_OFFSET(rSELF)
move a0, rSELF
and ra, ra, THREAD_SUSPEND_OR_CHECKPOINT_REQUEST
beqzc ra, 1f
jal MterpSuspendCheck # (self)
1:
li a0, 0
b MterpReturn
%def op_return_void_no_barrier():
.extern MterpSuspendCheck
lw ra, THREAD_FLAGS_OFFSET(rSELF)
move a0, rSELF
and ra, ra, THREAD_SUSPEND_OR_CHECKPOINT_REQUEST
beqzc ra, 1f
jal MterpSuspendCheck # (self)
1:
li a0, 0
b MterpReturn
%def op_return_wide():
/*
* Return a 64-bit value.
*/
/* return-wide vAA */
/* op vAA */
.extern MterpThreadFenceForConstructor
.extern MterpSuspendCheck
jal MterpThreadFenceForConstructor
lw ra, THREAD_FLAGS_OFFSET(rSELF)
move a0, rSELF
and ra, ra, THREAD_SUSPEND_OR_CHECKPOINT_REQUEST
beqzc ra, 1f
jal MterpSuspendCheck # (self)
1:
srl a2, rINST, 8 # a2 <- AA
GET_VREG_WIDE a0, a2 # a0 <- vAA
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
srl a2, rINST, 8 # a2 <- AA
GET_VREG_U a0, a2 # a0 <- vAA (exception object)
beqzc a0, common_errNullObject
sd a0, THREAD_EXCEPTION_OFFSET(rSELF) # thread->exception <- obj
b MterpException
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