| Douglas Leung | 200f040 | 2016-02-25 20:05:47 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Generic one-operand compare-and-branch operation. Provide a "revcmp" |
| 3 | * fragment that specifies the *reverse* comparison to perform, e.g. |
| 4 | * for "if-le" you would use "gt". |
| 5 | * |
| 6 | * for: if-eqz, if-nez, if-ltz, if-gez, if-gtz, if-lez |
| 7 | */ |
| 8 | /* if-cmp vAA, +BBBB */ |
| 9 | GET_OPA(a0) # a0 <- AA |
| 10 | GET_VREG(a2, a0) # a2 <- vAA |
| 11 | FETCH_S(rINST, 1) # rINST <- branch offset, in code units |
| 12 | b${revcmp} a2, zero, 1f # branch to 1 if comparison failed |
| 13 | b 2f |
| 14 | 1: |
| 15 | li rINST, 2 # rINST- BYTE branch dist for not-taken |
| 16 | 2: |
| 17 | #if MTERP_PROFILE_BRANCHES |
| 18 | EXPORT_PC() |
| 19 | move a0, rSELF |
| 20 | addu a1, rFP, OFF_FP_SHADOWFRAME |
| 21 | move a2, rINST |
| 22 | JAL(MterpProfileBranch) # (self, shadow_frame, offset) |
| 23 | bnez v0, MterpOnStackReplacement # Note: offset must be in rINST |
| 24 | #endif |
| 25 | addu a1, rINST, rINST # convert to bytes |
| 26 | FETCH_ADVANCE_INST_RB(a1) # update rPC, load rINST |
| 27 | bgez a1, 3f |
| 28 | lw ra, THREAD_FLAGS_OFFSET(rSELF) |
| 29 | b MterpCheckSuspendAndContinue |
| 30 | 3: |
| 31 | GET_INST_OPCODE(t0) # extract opcode from rINST |
| 32 | GOTO_OPCODE(t0) # jump to next instruction |