| %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_void_no_barrier(): |
| 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 |
