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 movzx rINSTbl,%ecx # ecx <- A+ 12 andb $$0xf,%cl # ecx <- A 13 GET_VREG_R %eax %ecx # eax <- vA 14 sarl $$4,rINST # rINST<- B 15 movl rSELF,%ecx 16 cmpl (rFP,rINST,4),%eax # compare (vA, vB) 17 movl $$2,%eax # assume not taken 18 j${revcmp} 1f 19 movswl 2(rPC),%eax # Get signed branch offset 20 1: 21 movl offThread_curHandlerTable(%ecx),rIBASE 22 FETCH_INST_INDEXED %eax 23 ADVANCE_PC_INDEXED %eax 24 #if defined(WITH_JIT) 25 GET_JIT_PROF_TABLE %ecx %eax 26 cmp $$0, %eax 27 jne common_updateProfile # set up %ebx & %edx & rPC 28 #endif 29 GOTO_NEXT 30
