Alexey Frunze | 00b53b7 | 2016-02-02 20:25:45 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Unconditional branch, 8-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 +AA */ |
Alexey Frunze | db045be | 2016-03-03 17:50:48 -0800 | [diff] [blame] | 8 | .extern MterpProfileBranch |
| 9 | srl rINST, rINST, 8 |
| 10 | seb rINST, rINST # rINST <- offset (sign-extended AA) |
| 11 | #if MTERP_PROFILE_BRANCHES |
| 12 | EXPORT_PC |
| 13 | move a0, rSELF |
| 14 | daddu a1, rFP, OFF_FP_SHADOWFRAME |
| 15 | move a2, rINST |
| 16 | jal MterpProfileBranch # (self, shadow_frame, offset) |
| 17 | bnezc v0, MterpOnStackReplacement # Note: offset must be in rINST |
Alexey Frunze | 00b53b7 | 2016-02-02 20:25:45 -0800 | [diff] [blame] | 18 | #endif |
Alexey Frunze | db045be | 2016-03-03 17:50:48 -0800 | [diff] [blame] | 19 | dlsa rPC, rINST, rPC, 1 # rPC <- rPC + offset * 2 |
| 20 | lw ra, THREAD_FLAGS_OFFSET(rSELF) # Preload flags for MterpCheckSuspendAndContinue |
| 21 | move a0, rINST # a0 <- offset |
| 22 | FETCH_INST # load rINST |
| 23 | bltz a0, MterpCheckSuspendAndContinue # suspend check if backwards branch |
Alexey Frunze | 00b53b7 | 2016-02-02 20:25:45 -0800 | [diff] [blame] | 24 | GET_INST_OPCODE v0 # extract opcode from rINST |
| 25 | GOTO_OPCODE v0 # jump to next instruction |