| %verify "branch taken" |
| %verify "branch not taken" |
| /* |
| * Generic two-operand compare-and-branch operation. Provide a "revcmp" |
| * fragment that specifies the *reverse* comparison to perform, e.g. |
| * for "if-le" you would use "gt". |
| * |
| * For: if-eq, if-ne, if-lt, if-ge, if-gt, if-le |
| */ |
| /* if-cmp vA, vB, +CCCC */ |
| mov r1, rINST, lsr #12 @ r1<- B |
| ubfx r0, rINST, #8, #4 @ r0<- A |
| GET_VREG(r3, r1) @ r3<- vB |
| GET_VREG(r2, r0) @ r2<- vA |
| mov r9, #4 @ r0<- BYTE branch dist for not-taken |
| cmp r2, r3 @ compare (vA, vB) |
| b${revcmp} 1f @ branch to 1 if comparison failed |
| FETCH_S(r9, 1) @ r9<- branch offset, in code units |
| movs r9, r9, asl #1 @ convert to bytes, check sign |
| bmi common_backwardBranch @ yes, do periodic checks |
| 1: |
| #if defined(WITH_JIT) |
| GET_JIT_PROF_TABLE(r0) |
| FETCH_ADVANCE_INST_RB(r9) @ update rPC, load rINST |
| b common_testUpdateProfile |
| #else |
| FETCH_ADVANCE_INST_RB(r9) @ update rPC, load rINST |
| GET_INST_OPCODE(ip) @ extract opcode from rINST |
| GOTO_OPCODE(ip) @ jump to next instruction |
| #endif |
