diff options
Diffstat (limited to 'vm/mterp/armv5te/zcmp.S')
| -rw-r--r-- | vm/mterp/armv5te/zcmp.S | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/vm/mterp/armv5te/zcmp.S b/vm/mterp/armv5te/zcmp.S new file mode 100644 index 0000000..d79e7c4 --- /dev/null +++ b/vm/mterp/armv5te/zcmp.S @@ -0,0 +1,31 @@ +%verify "branch taken" +%verify "branch not taken" + /* + * Generic one-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-eqz, if-nez, if-ltz, if-gez, if-gtz, if-lez + */ + /* if-cmp vAA, +BBBB */ + mov r0, rINST, lsr #8 @ r0<- AA + GET_VREG(r2, r0) @ r2<- vAA + mov r9, #4 @ r0<- BYTE branch dist for not-taken + cmp r2, #0 @ compare (vA, 0) + 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 @ backward branch, do periodic checks +1: +#if defined(WITH_JIT) + GET_JIT_PROF_TABLE(r0) + FETCH_ADVANCE_INST_RB(r9) @ update rPC, load rINST + cmp r0,#0 + bne common_updateProfile + GET_INST_OPCODE(ip) @ extract opcode from rINST + GOTO_OPCODE(ip) @ jump to next instruction +#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 |