1%verify "branch taken" 2%verify "branch not taken" 3 /* 4 * Generic two-operand compare-and-branch operation. Provide a "revcmp" 5 * fragment that specifies the *reverse* comparison to perform, e.g. 6 * for "if-le" you would use "gt". 7 * 8 * For: if-eq, if-ne, if-lt, if-ge, if-gt, if-le 9 */ 10 /* if-cmp vA, vB, +CCCC */ 11 mov r1, rINST, lsr #12 @ r1<- B 12 ubfx r0, rINST, #8, #4 @ r0<- A 13 GET_VREG(r3, r1) @ r3<- vB 14 GET_VREG(r2, r0) @ r2<- vA 15 FETCH_S(r1, 1) @ r1<- branch offset, in code units 16 cmp r2, r3 @ compare (vA, vB) 17 mov${revcmp} r1, #2 @ r1<- BYTE branch dist for not-taken 18 adds r2, r1, r1 @ convert to bytes, check sign 19 FETCH_ADVANCE_INST_RB(r2) @ update rPC, load rINST 20#if defined(WITH_JIT) 21 ldr r0, [rSELF, #offThread_pJitProfTable] 22 ldrmi rIBASE, [rSELF, #offThread_curHandlerTable] @ refresh rIBASE 23 cmp r0, #0 24 bne common_updateProfile 25#else 26 ldrmi rIBASE, [rSELF, #offThread_curHandlerTable] @ refresh rIBASE 27#endif 28 GET_INST_OPCODE(ip) @ extract opcode from rINST 29 GOTO_OPCODE(ip) @ jump to next instruction 30