/* * 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 */ #if MTERP_PROFILE_BRANCHES sll a0, rINST, 16 # a0 <- AAxx0000 sra rINST, a0, 24 # rINST <- ssssssAA (sign-extended) EXPORT_PC() move a0, rSELF addu a1, rFP, OFF_FP_SHADOWFRAME move a2, rINST JAL(MterpProfileBranch) # (self, shadow_frame, offset) bnez v0, MterpOnStackReplacement # Note: offset must be in rINST addu a2, rINST, rINST # a2 <- byte offset FETCH_ADVANCE_INST_RB(a2) # update rPC, load rINST /* If backwards branch refresh rIBASE */ bgez a2, 1f lw ra, THREAD_FLAGS_OFFSET(rSELF) b MterpCheckSuspendAndContinue 1: GET_INST_OPCODE(t0) # extract opcode from rINST GOTO_OPCODE(t0) # jump to next instruction #else sll a0, rINST, 16 # a0 <- AAxx0000 sra rINST, a0, 24 # rINST <- ssssssAA (sign-extended) addu a2, rINST, rINST # a2 <- byte offset FETCH_ADVANCE_INST_RB(a2) # update rPC, load rINST /* If backwards branch refresh rIBASE */ bgez a1, 1f lw ra, THREAD_FLAGS_OFFSET(rSELF) b MterpCheckSuspendAndContinue 1: GET_INST_OPCODE(t0) # extract opcode from rINST GOTO_OPCODE(t0) # jump to next instruction #endif