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WebSVN – planix.SVN – Blame – /os/branches/planix-v0/sys/src/libmp/386/mpdigdiv.s – Rev 2

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TEXT	mpdigdiv(SB),$0
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	MOVL	dividend+0(FP),BX
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	MOVL	0(BX),AX
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	MOVL	4(BX),DX
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	MOVL	divisor+4(FP),BX
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	MOVL	quotient+8(FP),BP
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	XORL	CX,CX
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	CMPL	DX,BX		/* dividend >= 2^32 * divisor */
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	JHS	_divovfl
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	CMPL	BX,CX		/* divisor == 0 */
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	JE	_divovfl
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	DIVL	BX		/* AX = DX:AX/BX */
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	MOVL	AX,0(BP)
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	RET
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	/* return all 1's */
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_divovfl:
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	NOTL	CX
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	MOVL	CX,0(BP)
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	RET