TEXT	memcmp(SB), $0#define	BDNZ	BC	16,0,	MOVW R3, s1+0(FP)		/* R3 is pointer1 */ /* * performance: *	67mb/sec aligned; 16mb/sec unaligned */ 	MOVW	n+8(FP), R4		/* R4 is count */	MOVW	s2+4(FP), R5		/* R5 is pointer2 */ /* * let LSW do the work for 4 characters or less; aligned and unaligned */	CMP	R4, $0	BLE	eq	CMP	R4, $4	BLE	out 	XOR	R3, R5, R9	ANDCC	$3, R9	BNE	l4	/* pointers misaligned; use LSW loop */ /* * do enough bytes to align pointers */	ANDCC	$3,R3, R9	BEQ	l2	SUBC	R9, $4, R9	MOVW	R9, XER	LSW	(R3), R10	ADD	R9, R3	LSW	(R5), R14	ADD	R9, R5	SUB	R9, R4	CMPU	R10, R14	BNE	ne /* * compare 16 at a time */l2:	SRAWCC	$4, R4, R9	BLE	l4	MOVW	R9, CTR	SUB	$4, R3	SUB	$4, R5l3:	MOVWU	4(R3), R10	MOVWU	4(R5), R12	MOVWU	4(R3), R11	MOVWU	4(R5), R13	CMPU	R10, R12	BNE	ne	MOVWU	4(R3), R10	MOVWU	4(R5), R12	CMPU	R11, R13	BNE	ne	MOVWU	4(R3), R11	MOVWU	4(R5), R13	CMPU	R10, R12	BNE	ne	CMPU	R11, R13	BNE	ne	BDNZ	l3	ADD	$4, R3	ADD	$4, R5	RLWNMCC	$0, R4, $15, R4	/* residue */	BEQ	eq /* * do remaining words with LSW; also does unaligned case */l4:	SRAWCC	$2, R4, R9	BLE	out	MOVW	R9, CTRl5:	LSW	(R3), $4, R10	ADD	$4, R3	LSW	(R5), $4, R11	ADD	$4, R5	CMPU	R10, R11	BNE	ne	BDNZ	l5	RLWNMCC	$0, R4, $3, R4	/* residue */	BEQ	eq /* * do remaining bytes with final LSW */out:	MOVW	R4, XER	LSW	(R3), R10	LSW	(R5), R11	CMPU	R10, R11	BNE	ne eq:	MOVW	$0, R3	RETURN ne:	MOVW	$1, R3	BGE	ret	MOVW	$-1,R3ret:	RETURN	END