1 TEXT memcmp(SB),$0 2 3 MOVL n+8(FP), BX 4 CMPL BX, $0 5 JEQ none 6 MOVL p1+0(FP), DI 7 MOVL p2+4(FP), SI 8 CLD 9/* 10 * first by longs 11 */ 12 13 MOVL BX, CX 14 SHRL $2, CX 15 16 REP; CMPSL 17 JNE found 18 19/* 20 * then by bytes 21 */ 22 ANDL $3, BX 23 MOVL BX, CX 24 REP; CMPSB 25 JNE found1 26 27none: 28 MOVL $0, AX 29 RET 30 31/* 32 * if long found, 33 * back up and look by bytes 34 */ 35found: 36 MOVL $4, CX 37 SUBL CX, DI 38 SUBL CX, SI 39 REP; CMPSB 40 41found1: 42 JLS lt 43 MOVL $-1, AX 44 RET 45lt: 46 MOVL $1, AX 47 RET 48