diff options
| 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/libc/386/strcpy.s | |
Import sources from 2011-03-30 iso image
Diffstat (limited to 'sys/src/libc/386/strcpy.s')
| -rwxr-xr-x | sys/src/libc/386/strcpy.s | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/sys/src/libc/386/strcpy.s b/sys/src/libc/386/strcpy.s new file mode 100755 index 000000000..83482e8a2 --- /dev/null +++ b/sys/src/libc/386/strcpy.s @@ -0,0 +1,35 @@ + TEXT strcpy(SB),$0 + + MOVL $0, AX + MOVL $-1, CX + CLD +/* + * find end of second string + */ + + MOVL p2+4(FP), DI + REPN; SCASB + + MOVL DI, BX + SUBL p2+4(FP), BX + +/* + * copy the memory + */ + MOVL p1+0(FP), DI + MOVL p2+4(FP), SI +/* + * copy whole longs + */ + MOVL BX, CX + SHRL $2, CX + REP; MOVSL +/* + * copy the rest, by bytes + */ + ANDL $3, BX + MOVL BX, CX + REP; MOVSB + + MOVL p1+0(FP), AX + RET |