ref: 8c57331b9b7c3e7013fb6fd95b14271bff7f7001 dir: /sys/src/libc/68020/memchr.s/
TEXT memchr(SB),$0 MOVL n+8(FP),R0 BEQ ret MOVL s1+0(FP),A1 MOVL c+4(FP),R1 l1: CMPB R1,(A1)+ BEQ eq SUBL $1,R0 BNE l1 RTS eq: MOVL A1,R0 SUBL $1,R0 ret: RTS