| /* |
| * =========================================================================== |
| * 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 |
| move a0, rSELF |
| addu a1, rFP, OFF_FP_SHADOWFRAME |
| JAL(MterpLogDivideByZeroException) |
| #endif |
| b MterpCommonFallback |
| |
| common_errArrayIndex: |
| EXPORT_PC() |
| #if MTERP_LOGGING |
| move a0, rSELF |
| addu a1, rFP, OFF_FP_SHADOWFRAME |
| JAL(MterpLogArrayIndexException) |
| #endif |
| b MterpCommonFallback |
| |
| common_errNegativeArraySize: |
| EXPORT_PC() |
| #if MTERP_LOGGING |
| move a0, rSELF |
| addu a1, rFP, OFF_FP_SHADOWFRAME |
| JAL(MterpLogNegativeArraySizeException) |
| #endif |
| b MterpCommonFallback |
| |
| common_errNoSuchMethod: |
| EXPORT_PC() |
| #if MTERP_LOGGING |
| move a0, rSELF |
| addu a1, rFP, OFF_FP_SHADOWFRAME |
| JAL(MterpLogNoSuchMethodException) |
| #endif |
| b MterpCommonFallback |
| |
| common_errNullObject: |
| EXPORT_PC() |
| #if MTERP_LOGGING |
| move a0, rSELF |
| addu a1, rFP, OFF_FP_SHADOWFRAME |
| JAL(MterpLogNullObjectException) |
| #endif |
| b MterpCommonFallback |
| |
| common_exceptionThrown: |
| EXPORT_PC() |
| #if MTERP_LOGGING |
| move a0, rSELF |
| addu a1, rFP, OFF_FP_SHADOWFRAME |
| JAL(MterpLogExceptionThrownException) |
| #endif |
| b MterpCommonFallback |
| |
| MterpSuspendFallback: |
| EXPORT_PC() |
| #if MTERP_LOGGING |
| move a0, rSELF |
| addu a1, rFP, OFF_FP_SHADOWFRAME |
| lw a2, THREAD_FLAGS_OFFSET(rSELF) |
| JAL(MterpLogSuspendFallback) |
| #endif |
| b 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: |
| lw a0, THREAD_EXCEPTION_OFFSET(rSELF) |
| beqz a0, MterpFallback # If exception, fall back to reference interpreter. |
| /* 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: |
| move a0, rSELF |
| addu a1, rFP, OFF_FP_SHADOWFRAME |
| JAL(MterpHandleException) # (self, shadow_frame) |
| beqz v0, MterpExceptionReturn # no local catch, back to caller. |
| lw a0, OFF_FP_CODE_ITEM(rFP) |
| lw a1, OFF_FP_DEX_PC(rFP) |
| lw rIBASE, THREAD_CURRENT_IBASE_OFFSET(rSELF) |
| addu rPC, a0, CODEITEM_INSNS_OFFSET |
| sll a1, a1, 1 |
| addu rPC, rPC, a1 # generate new dex_pc_ptr |
| /* Do we need to switch interpreters? */ |
| JAL(MterpShouldSwitchInterpreters) |
| bnez v0, MterpFallback |
| /* resume execution at catch block */ |
| EXPORT_PC() |
| FETCH_INST() |
| GET_INST_OPCODE(t0) |
| GOTO_OPCODE(t0) |
| /* NOTE: no fallthrough */ |
| |
| /* |
| * Check for suspend check request. Assumes rINST already loaded, rPC advanced and |
| * still needs to get the opcode and branch to it, and flags are in lr. |
| */ |
| MterpCheckSuspendAndContinue: |
| lw rIBASE, THREAD_CURRENT_IBASE_OFFSET(rSELF) # refresh rIBASE |
| and ra, (THREAD_SUSPEND_REQUEST | THREAD_CHECKPOINT_REQUEST) |
| bnez ra, 1f |
| GET_INST_OPCODE(t0) # extract opcode from rINST |
| GOTO_OPCODE(t0) # jump to next instruction |
| 1: |
| EXPORT_PC() |
| move a0, rSELF |
| JAL(MterpSuspendCheck) # (self) |
| bnez v0, MterpFallback |
| GET_INST_OPCODE(t0) # extract opcode from rINST |
| GOTO_OPCODE(t0) # jump to next instruction |
| |
| /* |
| * On-stack replacement has happened, and now we've returned from the compiled method. |
| */ |
| MterpOnStackReplacement: |
| #if MTERP_LOGGING |
| move a0, rSELF |
| addu a1, rFP, OFF_FP_SHADOWFRAME |
| move a2, rINST |
| JAL(MterpLogOSR) |
| #endif |
| li v0, 1 # Signal normal return |
| b MterpDone |
| |
| /* |
| * Bail out to reference interpreter. |
| */ |
| MterpFallback: |
| EXPORT_PC() |
| #if MTERP_LOGGING |
| move a0, rSELF |
| addu a1, rFP, OFF_FP_SHADOWFRAME |
| JAL(MterpLogFallback) |
| #endif |
| MterpCommonFallback: |
| move v0, zero # signal retry with reference interpreter. |
| b MterpDone |
| /* |
| * We pushed some registers on the stack in ExecuteMterpImpl, then saved |
| * SP and LR. Here we restore SP, restore the registers, and then restore |
| * LR to PC. |
| * |
| * On entry: |
| * uint32_t* rFP (should still be live, pointer to base of vregs) |
| */ |
| MterpExceptionReturn: |
| li v0, 1 # signal return to caller. |
| b MterpDone |
| MterpReturn: |
| lw a2, OFF_FP_RESULT_REGISTER(rFP) |
| sw v0, 0(a2) |
| sw v1, 4(a2) |
| li v0, 1 # signal return to caller. |
| MterpDone: |
| /* Restore from the stack and return. Frame size = STACK_SIZE */ |
| STACK_LOAD_FULL() |
| jalr zero, ra |
| |
| .end ExecuteMterpImpl |
