1 TEXT strchr(SB),$0 2/* 3 * look for null 4 */ 5 MOVL p+0(FP), DI 6 MOVL $-1, CX 7 MOVL $0, AX 8 CLD 9 10 REPN; SCASB 11 12/* 13 * look for real char 14 */ 15 MOVL DI, CX 16 MOVL p+0(FP), DI 17 SUBL DI, CX 18 MOVBLZX c+4(FP), AX 19 20 REPN; SCASB 21 22 JEQ found 23 MOVL $0, AX 24 RET 25 26found: 27 MOVL DI, AX 28 SUBL $1, AX 29 RET 30