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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/libc/68020/memccpy.s | |
Import sources from 2011-03-30 iso image
Diffstat (limited to 'sys/src/libc/68020/memccpy.s')
| -rwxr-xr-x | sys/src/libc/68020/memccpy.s | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/sys/src/libc/68020/memccpy.s b/sys/src/libc/68020/memccpy.s new file mode 100755 index 000000000..3e494e915 --- /dev/null +++ b/sys/src/libc/68020/memccpy.s @@ -0,0 +1,30 @@ + TEXT memccpy(SB),$0 + MOVL n+12(FP),R0 + BEQ ret + MOVL s1+0(FP),A2 + MOVL s2+4(FP),A1 + MOVL c+8(FP),R1 + BEQ l2 + +/* + * general case + */ +l1: MOVB (A1)+,R2 + MOVB R2,(A2)+ + CMPB R2,R1 + BEQ eq + SUBL $1,R0 + BNE l1 + RTS + +/* + * special case for null character + */ +l2: MOVB (A1)+,(A2)+ + BEQ eq + SUBL $1,R0 + BNE l2 + RTS + +eq: MOVL A2,R0 +ret: RTS |