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| author | Taru Karttunen <taruti@taruti.net> | 2011-03-30 15:46:40 +0300 |
|---|---|---|
| committer | Taru Karttunen <taruti@taruti.net> | 2011-03-30 15:46:40 +0300 |
| commit | e5888a1ffdae813d7575f5fb02275c6bb07e5199 (patch) | |
| tree | d8d51eac403f07814b9e936eed0c9a79195e2450 /sys/src/ape/lib/ap/386/memchr.s | |
Import sources from 2011-03-30 iso image
Diffstat (limited to 'sys/src/ape/lib/ap/386/memchr.s')
| -rwxr-xr-x | sys/src/ape/lib/ap/386/memchr.s | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/sys/src/ape/lib/ap/386/memchr.s b/sys/src/ape/lib/ap/386/memchr.s new file mode 100755 index 000000000..23a1982a3 --- /dev/null +++ b/sys/src/ape/lib/ap/386/memchr.s @@ -0,0 +1,23 @@ + TEXT memchr(SB),$0 + + MOVL n+8(FP), CX + CMPL CX, $0 + JEQ none + MOVL p+0(FP), DI + MOVBLZX c+4(FP), AX + CLD +/* + * SCASB is memchr instruction + */ + + REPN; SCASB + JEQ found + +none: + MOVL $0, AX + RET + +found: + MOVL DI, AX + SUBL $1, AX + RET |