|
Packit |
6c4009 |
/* memchr (str, ch, n) -- Return pointer to first occurrence of CH in STR less
|
|
Packit |
6c4009 |
than N.
|
|
Packit |
6c4009 |
For SPARC v9.
|
|
Packit |
6c4009 |
Copyright (C) 1998-2018 Free Software Foundation, Inc.
|
|
Packit |
6c4009 |
This file is part of the GNU C Library.
|
|
Packit |
6c4009 |
Contributed by Jan Vondrak <jvon4518@ss1000.ms.mff.cuni.cz> and
|
|
Packit |
6c4009 |
Jakub Jelinek <jj@ultra.linux.cz>.
|
|
Packit |
6c4009 |
This version is developed using the same algorithm as the fast C
|
|
Packit |
6c4009 |
version which carries the following introduction:
|
|
Packit |
6c4009 |
Based on strlen implementation by Torbjorn Granlund (tege@sics.se),
|
|
Packit |
6c4009 |
with help from Dan Sahlin (dan@sics.se) and
|
|
Packit |
6c4009 |
commentary by Jim Blandy (jimb@ai.mit.edu);
|
|
Packit |
6c4009 |
adaptation to memchr suggested by Dick Karpinski (dick@cca.ucsf.edu),
|
|
Packit |
6c4009 |
and implemented by Roland McGrath (roland@ai.mit.edu).
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|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
The GNU C Library is free software; you can redistribute it and/or
|
|
Packit |
6c4009 |
modify it under the terms of the GNU Lesser General Public
|
|
Packit |
6c4009 |
License as published by the Free Software Foundation; either
|
|
Packit |
6c4009 |
version 2.1 of the License, or (at your option) any later version.
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|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
The GNU C Library is distributed in the hope that it will be useful,
|
|
Packit |
6c4009 |
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
Packit |
6c4009 |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Packit |
6c4009 |
Lesser General Public License for more details.
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
You should have received a copy of the GNU Lesser General Public
|
|
Packit |
6c4009 |
License along with the GNU C Library; if not, see
|
|
Packit |
6c4009 |
<http://www.gnu.org/licenses/>. */
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|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
#include <sysdep.h>
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|
Packit |
6c4009 |
#include <asm/asi.h>
|
|
Packit |
6c4009 |
#ifndef XCC
|
|
Packit |
6c4009 |
#define XCC xcc
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|
Packit |
6c4009 |
#define USE_BPR
|
|
Packit |
6c4009 |
.register %g2, #scratch
|
|
Packit |
6c4009 |
.register %g3, #scratch
|
|
Packit |
6c4009 |
#endif
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
/* Normally, this uses
|
|
Packit |
6c4009 |
((xword - 0x0101010101010101) & 0x8080808080808080) test
|
|
Packit |
6c4009 |
to find out if any byte in xword could be zero. This is fast, but
|
|
Packit |
6c4009 |
also gives false alarm for any byte in range 0x81-0xff. It does
|
|
Packit |
6c4009 |
not matter for correctness, as if this test tells us there could
|
|
Packit |
6c4009 |
be some zero byte, we check it byte by byte, but if bytes with
|
|
Packit |
6c4009 |
high bits set are common in the strings, then this will give poor
|
|
Packit |
6c4009 |
performance. You can #define EIGHTBIT_NOT_RARE and the algorithm
|
|
Packit |
6c4009 |
will use one tick slower, but more precise test
|
|
Packit |
6c4009 |
((xword - 0x0101010101010101) & (~xword) & 0x8080808080808080),
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|
Packit |
6c4009 |
which does not give any false alarms (but if some bits are set,
|
|
Packit |
6c4009 |
one cannot assume from it which bytes are zero and which are not).
|
|
Packit |
6c4009 |
It is yet to be measured, what is the correct default for glibc
|
|
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6c4009 |
in these days for an average user.
|
|
Packit |
6c4009 |
*/
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|
Packit |
6c4009 |
|
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6c4009 |
.text
|
|
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6c4009 |
.align 32
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6c4009 |
ENTRY(__memchr)
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|
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6c4009 |
and %o1, 0xff, %o1 /* IEU0 Group */
|
|
Packit |
6c4009 |
#ifdef USE_BPR
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|
Packit |
6c4009 |
brz,pn %o2, 12f /* CTI+IEU1 */
|
|
Packit |
6c4009 |
#else
|
|
Packit |
6c4009 |
tst %o2 /* IEU1 */
|
|
Packit |
6c4009 |
be,pn %XCC, 12f /* CTI */
|
|
Packit |
6c4009 |
#endif
|
|
Packit |
6c4009 |
sll %o1, 8, %g3 /* IEU0 Group */
|
|
Packit |
6c4009 |
addcc %o0, %o2, %o2 /* IEU1 */
|
|
Packit |
6c4009 |
movcs %XCC, -1, %o2 /* IEU0 Group */
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
sethi %hi(0x01010101), %g1 /* IEU0 Group */
|
|
Packit |
6c4009 |
or %g3, %o1, %g3 /* IEU1 */
|
|
Packit |
6c4009 |
ldub [%o0], %o3 /* Load */
|
|
Packit |
6c4009 |
sllx %g3, 16, %g5 /* IEU0 Group */
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
or %g1, %lo(0x01010101), %g1 /* IEU1 */
|
|
Packit |
6c4009 |
sllx %g1, 32, %g2 /* IEU0 Group */
|
|
Packit |
6c4009 |
or %g3, %g5, %g3 /* IEU1 */
|
|
Packit |
6c4009 |
sllx %g3, 32, %g5 /* IEU0 Group */
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
cmp %o3, %o1 /* IEU1 */
|
|
Packit |
6c4009 |
be,pn %xcc, 13f /* CTI */
|
|
Packit |
6c4009 |
or %g1, %g2, %g1 /* IEU0 Group */
|
|
Packit |
6c4009 |
andcc %o0, 7, %g0 /* IEU1 */
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
bne,a,pn %icc, 21f /* CTI */
|
|
Packit |
6c4009 |
add %o0, 1, %o0 /* IEU0 Group */
|
|
Packit |
6c4009 |
ldx [%o0], %o3 /* Load Group */
|
|
Packit |
6c4009 |
sllx %g1, 7, %g2 /* IEU0 */
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
or %g3, %g5, %g3 /* IEU1 */
|
|
Packit |
6c4009 |
1: add %o0, 8, %o0 /* IEU0 Group */
|
|
Packit |
6c4009 |
xor %o3, %g3, %o4 /* IEU1 */
|
|
Packit |
6c4009 |
/* %g1 = 0101010101010101 *
|
|
Packit |
6c4009 |
* %g2 = 8080088080808080 *
|
|
Packit |
6c4009 |
* %g3 = c c c c c c c c *
|
|
Packit |
6c4009 |
* %o3 = value *
|
|
Packit |
6c4009 |
* %o4 = value XOR c */
|
|
Packit |
6c4009 |
2: cmp %o0, %o2 /* IEU1 Group */
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
bgu,pn %XCC, 11f /* CTI */
|
|
Packit |
6c4009 |
ldxa [%o0] ASI_PNF, %o3 /* Load */
|
|
Packit |
6c4009 |
sub %o4, %g1, %o5 /* IEU0 Group */
|
|
Packit |
6c4009 |
add %o0, 8, %o0 /* IEU1 */
|
|
Packit |
6c4009 |
#ifdef EIGHTBIT_NOT_RARE
|
|
Packit |
6c4009 |
andn %o5, %o4, %o5 /* IEU0 Group */
|
|
Packit |
6c4009 |
#endif
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
andcc %o5, %g2, %g0 /* IEU1 Group */
|
|
Packit |
6c4009 |
be,a,pt %xcc, 2b /* CTI */
|
|
Packit |
6c4009 |
xor %o3, %g3, %o4 /* IEU0 */
|
|
Packit |
6c4009 |
srlx %o4, 56, %g5 /* IEU0 */
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
andcc %g5, 0xff, %g0 /* IEU1 Group */
|
|
Packit |
6c4009 |
be,pn %icc, 3f /* CTI */
|
|
Packit |
6c4009 |
srlx %o4, 48, %g5 /* IEU0 */
|
|
Packit |
6c4009 |
andcc %g5, 0xff, %g0 /* IEU1 Group */
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
be,pn %icc, 4f /* CTI */
|
|
Packit |
6c4009 |
srlx %o4, 40, %g5 /* IEU0 */
|
|
Packit |
6c4009 |
andcc %g5, 0xff, %g0 /* IEU1 Group */
|
|
Packit |
6c4009 |
be,pn %icc, 5f /* CTI */
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
srlx %o4, 32, %g5 /* IEU0 */
|
|
Packit |
6c4009 |
andcc %g5, 0xff, %g0 /* IEU1 Group */
|
|
Packit |
6c4009 |
be,pn %icc, 6f /* CTI */
|
|
Packit |
6c4009 |
srlx %o4, 24, %g5 /* IEU0 */
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
andcc %g5, 0xff, %g0 /* IEU1 Group */
|
|
Packit |
6c4009 |
be,pn %icc, 7f /* CTI */
|
|
Packit |
6c4009 |
srlx %o4, 16, %g5 /* IEU0 */
|
|
Packit |
6c4009 |
andcc %g5, 0xff, %g0 /* IEU1 Group */
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
be,pn %icc, 8f /* CTI */
|
|
Packit |
6c4009 |
srlx %o4, 8, %g5 /* IEU0 */
|
|
Packit |
6c4009 |
andcc %g5, 0xff, %g0 /* IEU1 Group */
|
|
Packit |
6c4009 |
be,pn %icc, 9f /* CTI */
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
andcc %o4, 0xff, %g0 /* IEU1 Group */
|
|
Packit |
6c4009 |
bne,pt %icc, 2b /* CTI */
|
|
Packit |
6c4009 |
xor %o3, %g3, %o4 /* IEU0 */
|
|
Packit |
6c4009 |
retl /* CTI+IEU1 Group */
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
add %o0, -9, %o0 /* IEU0 */
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
.align 16
|
|
Packit |
6c4009 |
3: retl /* CTI+IEU1 Group */
|
|
Packit |
6c4009 |
add %o0, -16, %o0 /* IEU0 */
|
|
Packit |
6c4009 |
4: retl /* CTI+IEU1 Group */
|
|
Packit |
6c4009 |
add %o0, -15, %o0 /* IEU0 */
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
5: retl /* CTI+IEU1 Group */
|
|
Packit |
6c4009 |
add %o0, -14, %o0 /* IEU0 */
|
|
Packit |
6c4009 |
6: retl /* CTI+IEU1 Group */
|
|
Packit |
6c4009 |
add %o0, -13, %o0 /* IEU0 */
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
7: retl /* CTI+IEU1 Group */
|
|
Packit |
6c4009 |
add %o0, -12, %o0 /* IEU0 */
|
|
Packit |
6c4009 |
8: retl /* CTI+IEU1 Group */
|
|
Packit |
6c4009 |
add %o0, -11, %o0 /* IEU0 */
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
9: retl /* CTI+IEU1 Group */
|
|
Packit |
6c4009 |
add %o0, -10, %o0 /* IEU0 */
|
|
Packit |
6c4009 |
11: sub %o4, %g1, %o5 /* IEU0 Group */
|
|
Packit |
6c4009 |
sub %o0, 8, %o0 /* IEU1 */
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
andcc %o5, %g2, %g0 /* IEU1 Group */
|
|
Packit |
6c4009 |
be,pt %xcc, 12f /* CTI */
|
|
Packit |
6c4009 |
sub %o2, %o0, %o2 /* IEU0 */
|
|
Packit |
6c4009 |
tst %o2 /* IEU1 Group */
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
be,pn %XCC, 12f /* CTI */
|
|
Packit |
6c4009 |
srlx %o4, 56, %g5 /* IEU0 */
|
|
Packit |
6c4009 |
andcc %g5, 0xff, %g0 /* IEU1 Group */
|
|
Packit |
6c4009 |
be,pn %icc, 13f /* CTI */
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
cmp %o2, 1 /* IEU0 */
|
|
Packit |
6c4009 |
be,pn %XCC, 12f /* CTI Group */
|
|
Packit |
6c4009 |
srlx %o4, 48, %g5 /* IEU0 */
|
|
Packit |
6c4009 |
andcc %g5, 0xff, %g0 /* IEU1 Group */
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
be,pn %icc, 14f /* CTI */
|
|
Packit |
6c4009 |
cmp %o2, 2 /* IEU1 Group */
|
|
Packit |
6c4009 |
be,pn %XCC, 12f /* CTI */
|
|
Packit |
6c4009 |
srlx %o4, 40, %g5 /* IEU0 */
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
andcc %g5, 0xff, %g0 /* IEU1 Group */
|
|
Packit |
6c4009 |
be,pn %icc, 15f /* CTI */
|
|
Packit |
6c4009 |
cmp %o2, 3 /* IEU1 Group */
|
|
Packit |
6c4009 |
be,pn %XCC, 12f /* CTI */
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
srlx %o4, 32, %g5 /* IEU0 */
|
|
Packit |
6c4009 |
andcc %g5, 0xff, %g0 /* IEU1 Group */
|
|
Packit |
6c4009 |
be,pn %icc, 16f /* CTI */
|
|
Packit |
6c4009 |
cmp %o2, 4 /* IEU1 Group */
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
be,pn %XCC, 12f /* CTI */
|
|
Packit |
6c4009 |
srlx %o4, 24, %g5 /* IEU0 */
|
|
Packit |
6c4009 |
andcc %g5, 0xff, %g0 /* IEU1 Group */
|
|
Packit |
6c4009 |
be,pn %icc, 17f /* CTI */
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
cmp %o2, 5 /* IEU1 Group */
|
|
Packit |
6c4009 |
be,pn %XCC, 12f /* CTI */
|
|
Packit |
6c4009 |
srlx %o4, 16, %g5 /* IEU0 */
|
|
Packit |
6c4009 |
andcc %g5, 0xff, %g0 /* IEU1 Group */
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
be,pn %icc, 18f /* CTI */
|
|
Packit |
6c4009 |
cmp %o2, 6 /* IEU1 Group */
|
|
Packit |
6c4009 |
be,pn %XCC, 12f /* CTI */
|
|
Packit |
6c4009 |
srlx %o4, 8, %g5 /* IEU0 */
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
andcc %g5, 0xff, %g0 /* IEU1 Group */
|
|
Packit |
6c4009 |
be,pn %icc, 19f /* CTI */
|
|
Packit |
6c4009 |
nop /* IEU0 */
|
|
Packit |
6c4009 |
12: retl /* CTI+IEU1 Group */
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
clr %o0 /* IEU0 */
|
|
Packit |
6c4009 |
nop /* Stub */
|
|
Packit |
6c4009 |
13: retl /* CTI+IEU1 Group */
|
|
Packit |
6c4009 |
nop /* IEU0 */
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
14: retl /* CTI+IEU1 Group */
|
|
Packit |
6c4009 |
add %o0, 1, %o0 /* IEU0 */
|
|
Packit |
6c4009 |
15: retl /* CTI+IEU1 Group */
|
|
Packit |
6c4009 |
add %o0, 2, %o0 /* IEU0 */
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
16: retl /* CTI+IEU1 Group */
|
|
Packit |
6c4009 |
add %o0, 3, %o0 /* IEU0 */
|
|
Packit |
6c4009 |
17: retl /* CTI+IEU1 Group */
|
|
Packit |
6c4009 |
add %o0, 4, %o0 /* IEU0 */
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
18: retl /* CTI+IEU1 Group */
|
|
Packit |
6c4009 |
add %o0, 5, %o0 /* IEU0 */
|
|
Packit |
6c4009 |
19: retl /* CTI+IEU1 Group */
|
|
Packit |
6c4009 |
add %o0, 6, %o0 /* IEU0 */
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
21: cmp %o0, %o2 /* IEU1 */
|
|
Packit |
6c4009 |
be,pn %XCC, 12b /* CTI */
|
|
Packit |
6c4009 |
sllx %g1, 7, %g2 /* IEU0 Group */
|
|
Packit |
6c4009 |
ldub [%o0], %o3 /* Load */
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
or %g3, %g5, %g3 /* IEU1 */
|
|
Packit |
6c4009 |
22: andcc %o0, 7, %g0 /* IEU1 Group */
|
|
Packit |
6c4009 |
be,a,pn %icc, 1b /* CTI */
|
|
Packit |
6c4009 |
ldx [%o0], %o3 /* Load */
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
cmp %o3, %o1 /* IEU1 Group */
|
|
Packit |
6c4009 |
be,pn %xcc, 23f /* CTI */
|
|
Packit |
6c4009 |
add %o0, 1, %o0 /* IEU0 */
|
|
Packit |
6c4009 |
cmp %o0, %o2 /* IEU1 Group */
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
bne,a,pt %XCC, 22b /* CTI */
|
|
Packit |
6c4009 |
ldub [%o0], %o3 /* Load */
|
|
Packit |
6c4009 |
retl /* CTI+IEU1 Group */
|
|
Packit |
6c4009 |
clr %o0 /* IEU0 */
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
23: retl /* CTI+IEU1 Group */
|
|
Packit |
6c4009 |
add %o0, -1, %o0 /* IEU0 */
|
|
Packit |
6c4009 |
END(__memchr)
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
weak_alias (__memchr, memchr)
|
|
Packit |
6c4009 |
libc_hidden_builtin_def (memchr)
|