/*
 * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

/* This is optimized primarily for the ARC700.
   It would be possible to speed up the loops by one cycle / word
   respective one cycle / byte by forcing double source 1 alignment, unrolling
   by a factor of two, and speculatively loading the second word / byte of
   source 1; however, that would increase the overhead for loop setup / finish,
   and strcmp might often terminate early.  */

#include <linux/linkage.h>

ENTRY_CFI(strcmp)
	or	r2,r0,r1
	bmsk_s	r2,r2,1
	brne	r2,0,.Lcharloop
	mov_s	r12,0x01010101
	ror	r5,r12
.Lwordloop:
	ld.ab	r2,[r0,4]
	ld.ab	r3,[r1,4]
	nop_s
	sub	r4,r2,r12
	bic	r4,r4,r2
	and	r4,r4,r5
	brne	r4,0,.Lfound0
	breq	r2,r3,.Lwordloop
#ifdef	__LITTLE_ENDIAN__
	xor	r0,r2,r3	; mask for difference
	sub_s	r1,r0,1
	bic_s	r0,r0,r1	; mask for least significant difference bit
	sub	r1,r5,r0
	xor	r0,r5,r1	; mask for least significant difference byte
	and_s	r2,r2,r0
	and_s	r3,r3,r0
#endif /* LITTLE ENDIAN */
	cmp_s	r2,r3
	mov_s	r0,1
	j_s.d	[blink]
	bset.lo	r0,r0,31

	.balign	4
#ifdef __LITTLE_ENDIAN__
.Lfound0:
	xor	r0,r2,r3	; mask for difference
	or	r0,r0,r4	; or in zero indicator
	sub_s	r1,r0,1
	bic_s	r0,r0,r1	; mask for least significant difference bit
	sub	r1,r5,r0
	xor	r0,r5,r1	; mask for least significant difference byte
	and_s	r2,r2,r0
	and_s	r3,r3,r0
	sub.f	r0,r2,r3
	mov.hi	r0,1
	j_s.d	[blink]
	bset.lo	r0,r0,31
#else /* BIG ENDIAN */
	/* The zero-detection above can mis-detect 0x01 bytes as zeroes
	   because of carry-propagateion from a lower significant zero byte.
	   We can compensate for this by checking that bit0 is zero.
	   This compensation is not necessary in the step where we
	   get a low estimate for r2, because in any affected bytes
	   we already have 0x00 or 0x01, which will remain unchanged
	   when bit 7 is cleared.  */
	.balign	4
.Lfound0:
	lsr	r0,r4,8
	lsr_s	r1,r2
	bic_s	r2,r2,r0	; get low estimate for r2 and get ...
	bic_s	r0,r0,r1	; <this is the adjusted mask for zeros>
	or_s	r3,r3,r0	; ... high estimate r3 so that r2 > r3 will ...
	cmp_s	r3,r2		; ... be independent of trailing garbage
	or_s	r2,r2,r0	; likewise for r3 > r2
	bic_s	r3,r3,r0
	rlc	r0,0		; r0 := r2 > r3 ? 1 : 0
	cmp_s	r2,r3
	j_s.d	[blink]
	bset.lo	r0,r0,31
#endif /* ENDIAN */

	.balign	4
.Lcharloop:
	ldb.ab	r2,[r0,1]
	ldb.ab	r3,[r1,1]
	nop_s
	breq	r2,0,.Lcmpend
	breq	r2,r3,.Lcharloop
.Lcmpend:
	j_s.d	[blink]
	sub	r0,r2,r3
END_CFI(strcmp)
q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=5db4992d8f040b8d8db0b86d42806e0c417f7ccf'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/arch?id=5db4992d8f040b8d8db0b86d42806e0c417f7ccf'>arch</a>/<a href='/cgit.cgi/linux/net-next.git/commit/arch/sparc?id=5db4992d8f040b8d8db0b86d42806e0c417f7ccf'>sparc</a>/<a href='/cgit.cgi/linux/net-next.git/commit/arch/sparc/include?id=5db4992d8f040b8d8db0b86d42806e0c417f7ccf'>include</a>/<a href='/cgit.cgi/linux/net-next.git/commit/arch/sparc/include/asm?id=5db4992d8f040b8d8db0b86d42806e0c417f7ccf'>asm</a>/<a href='/cgit.cgi/linux/net-next.git/commit/arch/sparc/include/asm/idprom.h?id=5db4992d8f040b8d8db0b86d42806e0c417f7ccf'>idprom.h</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='5db4992d8f040b8d8db0b86d42806e0c417f7ccf'/><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><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Tobias Klauser &lt;tklauser@distanz.ch&gt;</td><td class='right'>2016-10-20 15:44:19 +0200</td></tr>
<tr><th>committer</th><td>Tobias Klauser &lt;tklauser@distanz.ch&gt;</td><td class='right'>2017-02-15 10:34:18 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/arch/sparc/include/asm/idprom.h?id=5db4992d8f040b8d8db0b86d42806e0c417f7ccf'>5db4992d8f040b8d8db0b86d42806e0c417f7ccf</a> (<a href='/cgit.cgi/linux/net-next.git/patch/arch/sparc/include/asm/idprom.h?id=5db4992d8f040b8d8db0b86d42806e0c417f7ccf'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=5db4992d8f040b8d8db0b86d42806e0c417f7ccf'>5b06e952af482d45f3ade64e77824662e34b7fa2</a> /<a href='/cgit.cgi/linux/net-next.git/tree/arch/sparc/include/asm/idprom.h?id=5db4992d8f040b8d8db0b86d42806e0c417f7ccf'>arch/sparc/include/asm/idprom.h</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/arch/sparc/include/asm/idprom.h?id=370ebb0ef6255132373ed35d13e7b1d8d2eb7003'>370ebb0ef6255132373ed35d13e7b1d8d2eb7003</a> (<a href='/cgit.cgi/linux/net-next.git/diff/arch/sparc/include/asm/idprom.h?id=5db4992d8f040b8d8db0b86d42806e0c417f7ccf&amp;id2=370ebb0ef6255132373ed35d13e7b1d8d2eb7003'>diff</a>)</td></tr></table>
<div class='commit-subject'>usbnet: pegasus: Use net_device_stats from struct net_device<span class='decoration'><a class='branch-deco' href='/cgit.cgi/linux/net-next.git/log/arch/sparc/include/asm/idprom.h?h=nds-private-remove'>nds-private-remove</a></span></div><div class='commit-msg'>Instead of using a private copy of struct net_device_stats in struct
pegasus, use stats from struct net_device. Also remove the now
unnecessary .ndo_get_stats function.

Cc: Petko Manolov &lt;petkan@nucleusys.com&gt;
Cc: linux-usb@vger.kernel.org
Signed-off-by: Tobias Klauser &lt;tklauser@distanz.ch&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=5db4992d8f040b8d8db0b86d42806e0c417f7ccf'>Diffstat</a> (limited to 'arch/sparc/include/asm/idprom.h')</div><table summary='diffstat' class='diffstat'>