1 %verify "branch taken" 2 %verify "branch not taken" 3 /* 4 * Generic one-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-eqz, if-nez, if-ltz, if-gez, if-gtz, if-lez 9 */ 10 /* if-cmp vAA, +BBBB */ 11 movzx rINST_HI,%ecx # ecx <- AA 12 cmpl $$0,(rFP,%ecx,4) # compare (vA, 0) 13 movswl 2(rPC),rINST_FULL # fetch signed displacement 14 movl $$2,%eax # assume branch not taken 15 j${revcmp} 1f 16 testl rINST_FULL,rINST_FULL 17 js common_backwardBranch 18 movl rINST_FULL,%eax 19 1: 20 FETCH_INST_INDEXED(%eax) 21 ADVANCE_PC_INDEXED(%eax) 22 GOTO_NEXT 23
