%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 r0, rINST, lsr #8 @ r0<- A+ mov r1, rINST, lsr #12 @ r1<- B and r0, r0, #15 GET_VREG(r3, r1) @ r3<- vB GET_VREG(r2, r0) @ r2<- vA FETCH_S(r1, 1) @ r1<- branch offset, in code units cmp r2, r3 @ compare (vA, vB) mov${revcmp} r1, #2 @ r1<- BYTE branch dist for not-taken adds r2, r1, r1 @ convert to bytes, check sign FETCH_ADVANCE_INST_RB(r2) @ update rPC, load rINST #if defined(WITH_JIT) ldr r0, [rSELF, #offThread_pJitProfTable] ldrmi rIBASE, [rSELF, #offThread_curHandlerTable] @ refresh rIBASE cmp r0,#0 bne common_updateProfile #else ldrmi rIBASE, [rSELF, #offThread_curHandlerTable] @ refresh rIBASE #endif GET_INST_OPCODE(ip) @ extract opcode from rINST GOTO_OPCODE(ip) @ jump to next instruction