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- 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
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