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/* Compare two memory blocks for differences in the first COUNT bytes.
For SPARC v9.
Copyright (C) 1998,1999 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Jan Vondrak <jvon4518@ss1000.ms.mff.cuni.cz> and
Jakub Jelinek <jj@ultra.linux.cz>.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <sysdep.h>
#include <asm/asi.h>
#ifndef XCC
#define XCC xcc
#define USE_BPR
.register %g2, #scratch
.register %g3, #scratch
#endif
.text
.align 32
ENTRY(memcmp)
#ifdef USE_BPR
brz,pn %o2, 3f /* CTI+IEU1 Group */
#else
tst %o2 /* IEU1 Group */
be,pn %XCC, 3f /* CTI */
#endif
andcc %o0, 7, %g0 /* IEU1 Group */
bne,pn %icc, 8f /* CTI */
1: andcc %o1, 7, %g1 /* IEU1 Group */
bne,pn %icc, 10f /* CTI */
mov 64, %g3 /* IEU0 */
ldx [%o0], %g1 /* Load Group */
sub %o1, %o0, %o1 /* IEU0 */
ldx [%o0 + %o1], %g2 /* Load Group */
add %o0, 8, %o0 /* IEU0 */
2: mov %g1, %o3 /* IEU0 Group */
subcc %o2, 8, %o2 /* IEU1 */
bl,pn %XCC, 5f /* CTI */
ldxa [%o0] ASI_PNF, %g1 /* Load Group */
mov %g2, %o4 /* IEU0 */
ldxa [%o0 + %o1] ASI_PNF, %g2 /* Load Group */
cmp %o3, %o4 /* IEU1 */
be,pt %xcc, 2b /* CTI */
add %o0, 8, %o0 /* IEU0 */
7: mov -1, %o0 /* IEU1 */
retl /* CTI+IEU1 Group */
movgu %xcc, 1, %o0 /* Single Group */
3: retl /* CTI+IEU1 Group */
clr %o0 /* IEU0 */
.align 16
5: mov %g2, %o4 /* IEU0 */
6: cmp %o2, -8 /* IEU1 */
be,pn %XCC, 3b /* CTI */
sub %g0, %o2, %o2 /* IEU0 Group */
sllx %o2, 3, %o2 /* IEU0 Group */
srlx %o3, %o2, %o3 /* IEU0 Group */
srlx %o4, %o2, %o4 /* IEU0 Group */
clr %o0 /* IEU1 */
cmp %o3, %o4 /* IEU1 Group */
movgu %xcc, 1, %o0 /* Single Group */
retl /* CTI+IEU1 Group */
movlu %xcc, -1, %o0 /* Single Group */
8: ldub [%o0], %o3 /* Load */
add %o0, 1, %o0 /* IEU0 */
ldub [%o1], %o4 /* Load Group */
add %o1, 1, %o1 /* IEU0 */
9: cmp %o3, %o4 /* IEU1 Group */
bne,pn %xcc, 12f /* CTI */
subcc %o2, 1, %o2 /* IEU1 Group */
be,pn %XCC, 3b /* CTI */
lduba [%o0] ASI_PNF, %o3 /* Load */
andcc %o0, 7, %g0 /* IEU1 Group */
be,pn %icc, 1b /* CTI */
lduba [%o1] ASI_PNF, %o4 /* Load */
add %o0, 1, %o0 /* IEU0 Group */
ba,pt %xcc, 9b /* CTI */
add %o1, 1, %o1 /* IEU1 */
.align 16
12: mov -1, %o0 /* IEU0 Group */
cmp %o3, %o4 /* IEU1 */
retl /* CTI+IEU1 Group */
movgu %xcc, 1, %o0 /* Single Group */
.align 16
nop /* Stub */
10: sllx %g1, 3, %g2 /* IEU0 Group */
sub %o1, %g1, %o1 /* IEU1 */
sub %g3, %g2, %g3 /* IEU0 Group */
ldxa [%o0] ASI_PNF, %g5 /* Load */
sub %o1, %o0, %o1 /* IEU1 */
ldxa [%o0 + %o1] ASI_PNF, %g4 /* Load Group */
add %o0, 8, %o0 /* IEU0 */
11: sllx %g4, %g2, %o4 /* IEU0 Group */
ldxa [%o0 + %o1] ASI_PNF, %g4 /* Load */
srlx %g4, %g3, %o5 /* IEU0 Group */
mov %g5, %o3 /* IEU1 */
ldxa [%o0] ASI_PNF, %g5 /* Load */
subcc %o2, 8, %o2 /* IEU1 Group */
bl,pn %XCC, 6b /* CTI */
or %o4, %o5, %o4 /* IEU0 */
cmp %o3, %o4 /* IEU1 Group */
be,pt %xcc, 11b /* CTI */
add %o0, 8, %o0 /* IEU0 */
mov -1, %o0 /* IEU0 */
retl /* CTI+IEU1 Group */
movgu %xcc, 1, %o0 /* Single Group */
END(memcmp)
#undef bcmp
weak_alias(memcmp, bcmp)
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