1 TEXT memchr(SB),$0 2 3 MOVL n+8(FP), CX 4 CMPL CX, $0 5 JEQ none 6 MOVL p+0(FP), DI 7 MOVBLZX c+4(FP), AX 8 CLD 9/* 10 * SCASB is memchr instruction 11 */ 12 13 REPN; SCASB 14 JEQ found 15 16none: 17 MOVL $0, AX 18 RET 19 20found: 21 MOVL DI, AX 22 SUBL $1, AX 23 RET 24