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