diff options
Diffstat (limited to 'libkern/strchr-386.s')
| -rw-r--r-- | libkern/strchr-386.s | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/libkern/strchr-386.s b/libkern/strchr-386.s new file mode 100644 index 00000000..e437caf2 --- /dev/null +++ b/libkern/strchr-386.s @@ -0,0 +1,29 @@ + TEXT strchr(SB),$0 +/* + * look for null + */ + MOVL p+0(FP), DI + MOVL $-1, CX + MOVL $0, AX + CLD + + REPN; SCASB + +/* + * look for real char + */ + MOVL DI, CX + MOVL p+0(FP), DI + SUBL DI, CX + MOVBLZX c+4(FP), AX + + REPN; SCASB + + JEQ found + MOVL $0, AX + RET + +found: + MOVL DI, AX + SUBL $1, AX + RET |