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- TEXT memccpy(SB),$0
- MOVL n+24(FP), CX
- CMPL CX, $0
- JEQ none
- MOVQ p2+8(FP), DI
- MOVBLZX c+16(FP), AX
- CLD
- /*
- * find the character in the second string
- */
- REPN; SCASB
- JEQ found
- /*
- * if not found, set count to 'n'
- */
- none:
- MOVL $0, AX
- MOVL n+24(FP), BX
- JMP memcpy
- /*
- * if found, set count to bytes thru character
- */
- found:
- MOVQ DI, AX
- SUBQ p2+8(FP), AX
- MOVQ AX, BX
- ADDQ RARG, AX
- /*
- * copy the memory
- */
- memcpy:
- MOVQ RARG, DI
- MOVQ p2+8(FP), SI
- /*
- * copy whole longs, if aligned
- */
- MOVQ DI, DX
- ORQ SI, DX
- ANDL $3, DX
- JNE c3
- MOVL BX, CX
- SHRQ $2, CX
- REP; MOVSL
- /*
- * copy the rest, by bytes
- */
- ANDL $3, BX
- c3:
- MOVL BX, CX
- REP; MOVSB
- RET
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