/*
 * String handling functions for PowerPC.
 *
 * Copyright (C) 1996 Paul Mackerras.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */
#include <asm/processor.h>
#include <asm/errno.h>
#include <asm/ppc_asm.h>
#include <asm/export.h>

_GLOBAL(memset)
	neg	r0,r3
	rlwimi	r4,r4,8,16,23
	andi.	r0,r0,7			/* # bytes to be 8-byte aligned */
	rlwimi	r4,r4,16,0,15
	cmplw	cr1,r5,r0		/* do we get that far? */
	rldimi	r4,r4,32,0
	PPC_MTOCRF(1,r0)
	mr	r6,r3
	blt	cr1,8f
	beq+	3f			/* if already 8-byte aligned */
	subf	r5,r0,r5
	bf	31,1f
	stb	r4,0(r6)
	addi	r6,r6,1
1:	bf	30,2f
	sth	r4,0(r6)
	addi	r6,r6,2
2:	bf	29,3f
	stw	r4,0(r6)
	addi	r6,r6,4
3:	srdi.	r0,r5,6
	clrldi	r5,r5,58
	mtctr	r0
	beq	5f
	.balign 16
4:	std	r4,0(r6)
	std	r4,8(r6)
	std	r4,16(r6)
	std	r4,24(r6)
	std	r4,32(r6)
	std	r4,40(r6)
	std	r4,48(r6)
	std	r4,56(r6)
	addi	r6,r6,64
	bdnz	4b
5:	srwi.	r0,r5,3
	clrlwi	r5,r5,29
	PPC_MTOCRF(1,r0)
	beq	8f
	bf	29,6f
	std	r4,0(r6)
	std	r4,8(r6)
	std	r4,16(r6)
	std	r4,24(r6)
	addi	r6,r6,32
6:	bf	30,7f
	std	r4,0(r6)
	std	r4,8(r6)
	addi	r6,r6,16
7:	bf	31,8f
	std	r4,0(r6)
	addi	r6,r6,8
8:	cmpwi	r5,0
	PPC_MTOCRF(1,r5)
	beqlr+
	bf	29,9f
	stw	r4,0(r6)
	addi	r6,r6,4
9:	bf	30,10f
	sth	r4,0(r6)
	addi	r6,r6,2
10:	bflr	31
	stb	r4,0(r6)
	blr
EXPORT_SYMBOL(memset)

_GLOBAL_TOC(memmove)
	cmplw	0,r3,r4
	bgt	backwards_memcpy
	b	memcpy

_GLOBAL(backwards_memcpy)
	rlwinm.	r7,r5,32-3,3,31		/* r0 = r5 >> 3 */
	add	r6,r3,r5
	add	r4,r4,r5
	beq	2f
	andi.	r0,r6,3
	mtctr	r7
	bne	5f
	.balign 16
1:	lwz	r7,-4(r4)
	lwzu	r8,-8(r4)
	stw	r7,-4(r6)
	stwu	r8,-8(r6)
	bdnz	1b
	andi.	r5,r5,7
2:	cmplwi	0,r5,4
	blt	3f
	lwzu	r0,-4(r4)
	subi	r5,r5,4
	stwu	r0,-4(r6)
3:	cmpwi	0,r5,0
	beqlr
	mtctr	r5
4:	lbzu	r0,-1(r4)
	stbu	r0,-1(r6)
	bdnz	4b
	blr
5:	mtctr	r0
6:	lbzu	r7,-1(r4)
	stbu	r7,-1(r6)
	bdnz	6b
	subf	r5,r0,r5
	rlwinm.	r7,r5,32-3,3,31
	beq	2b
	mtctr	r7
	b	1b
EXPORT_SYMBOL(memmove)
on value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/diff/'>root</a>/<a href='/cgit.cgi/linux/net-next.git/diff/Documentation'>Documentation</a>/<a href='/cgit.cgi/linux/net-next.git/diff/Documentation/media'>media</a>/<a href='/cgit.cgi/linux/net-next.git/diff/Documentation/media/uapi'>uapi</a>/<a href='/cgit.cgi/linux/net-next.git/diff/Documentation/media/uapi/mediactl'>mediactl</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/'>Diffstat</a> (limited to 'Documentation/media/uapi/mediactl')</div><table summary='diffstat' class='diffstat'>