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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/sh/lib64/udivsi3.S
10817 views
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	.global	__udivsi3

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	.section	.text..SHmedia32,"ax"

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	.align	2

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/*

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   inputs: r4,r5

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   clobbered: r18,r19,r20,r21,r22,r25,tr0

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   result in r0.

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 */

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__udivsi3:

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	addz.l r5,r63,r22

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	nsb r22,r0

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	shlld r22,r0,r25

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	shlri r25,48,r25

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	movi 0xffffffffffffbb0c,r20 /* shift count eqiv 76 */

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	sub r20,r25,r21

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	mmulfx.w r21,r21,r19

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	mshflo.w r21,r63,r21

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	ptabs r18,tr0

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	mmulfx.w r25,r19,r19

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	sub r20,r0,r0

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	/* bubble */

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	msub.w r21,r19,r19

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	/*

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	 * It would be nice for scheduling to do this add to r21 before

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	 * the msub.w, but we need a different value for r19 to keep

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	 * errors under control.

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	 */

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	addi r19,-2,r21

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	mulu.l r4,r21,r18

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	mmulfx.w r19,r19,r19

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	shlli r21,15,r21

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	shlrd r18,r0,r18

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	mulu.l r18,r22,r20

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	mmacnfx.wl r25,r19,r21

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	/* bubble */

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	sub r4,r20,r25

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	mulu.l r25,r21,r19

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	addi r0,14,r0

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	/* bubble */

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	shlrd r19,r0,r19

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	mulu.l r19,r22,r20

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	add r18,r19,r18

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	/* bubble */

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	sub.l r25,r20,r25

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	mulu.l r25,r21,r19

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	addz.l r25,r63,r25

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	sub r25,r22,r25

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	shlrd r19,r0,r19

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	mulu.l r19,r22,r20

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	addi r25,1,r25

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	add r18,r19,r18

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	cmpgt r25,r20,r25

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	add.l r18,r25,r0

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	blink tr0,r63

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