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Rev Author Line No. Line
2 - 1 
TO = 1
2 
TOE = 2
3 
N = 3
4 
TMP = 3					/* N and TMP don't overlap */
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TEXT memset(SB), $0
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	MOVW	R0, R(TO)
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	MOVW	data+4(FP), R(4)
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	MOVW	n+8(FP), R(N)
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	ADD	R(N), R(TO), R(TOE)	/* to end pointer */
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	CMP	$4, R(N)		/* need at least 4 bytes to copy */
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	BLT	_1tail
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	AND	$0xFF, R(4)
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	ORR	R(4)<<8, R(4)
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	ORR	R(4)<<16, R(4)		/* replicate to word */
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_4align:				/* align on 4 */
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	AND.S	$3, R(TO), R(TMP)
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	BEQ	_4aligned
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	MOVBU.P	R(4), 1(R(TO))		/* implicit write back */
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	B	_4align
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_4aligned:
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	SUB	$15, R(TOE), R(TMP)	/* do 16-byte chunks if possible */
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	CMP	R(TMP), R(TO)
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	BHS	_4tail
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32 
	MOVW	R4, R5			/* replicate */
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	MOVW	R4, R6
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	MOVW	R4, R7
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_f16loop:
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	CMP	R(TMP), R(TO)
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	BHS	_4tail
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	MOVM.IA.W [R4-R7], (R(TO))
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	B	_f16loop
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_4tail:
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	SUB	$3, R(TOE), R(TMP)	/* do remaining words if possible */
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_4loop:
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	CMP	R(TMP), R(TO)
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	BHS	_1tail
48 
 
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	MOVW.P	R(4), 4(R(TO))		/* implicit write back */
50 
	B	_4loop
51 
 
52 
_1tail:
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	CMP	R(TO), R(TOE)
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	BEQ	_return
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56 
	MOVBU.P	R(4), 1(R(TO))		/* implicit write back */
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	B	_1tail
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_return:
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	RET