1 /* 2 * Unconditional branch, 16-bit offset. 3 * 4 * The branch distance is a signed code-unit offset, which we need to 5 * double to get a byte offset. 6 */ 7 /* goto/16 +AAAA */ 8 #if MTERP_PROFILE_BRANCHES 9 FETCH_S(rINST, 1) # rINST <- ssssAAAA (sign-extended) 10 EXPORT_PC() 11 move a0, rSELF 12 addu a1, rFP, OFF_FP_SHADOWFRAME 13 move a2, rINST 14 JAL(MterpProfileBranch) # (self, shadow_frame, offset) 15 bnez v0, MterpOnStackReplacement # Note: offset must be in rINST 16 addu a1, rINST, rINST # a1 <- byte offset, flags set 17 FETCH_ADVANCE_INST_RB(a1) # update rPC, load rINST 18 bgez a1, 1f 19 lw ra, THREAD_FLAGS_OFFSET(rSELF) 20 b MterpCheckSuspendAndContinue 21 1: 22 GET_INST_OPCODE(t0) # extract opcode from rINST 23 GOTO_OPCODE(t0) # jump to next instruction 24 #else 25 FETCH_S(rINST, 1) # rINST <- ssssAAAA (sign-extended) 26 addu a1, rINST, rINST # a1 <- byte offset, flags set 27 FETCH_ADVANCE_INST_RB(a1) # update rPC, load rINST 28 bgez a1, 1f 29 lw ra, THREAD_FLAGS_OFFSET(rSELF) 30 b MterpCheckSuspendAndContinue 31 1: 32 GET_INST_OPCODE(t0) # extract opcode from rINST 33 GOTO_OPCODE(t0) # jump to next instruction 34 #endif 35
