|
Packit |
6c4009 |
/* strcat (dest, src) -- Append SRC on the end of DEST.
|
|
Packit |
6c4009 |
For SPARC v7.
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|
Packit |
6c4009 |
Copyright (C) 1996-2018 Free Software Foundation, Inc.
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|
Packit |
6c4009 |
This file is part of the GNU C Library.
|
|
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6c4009 |
Contributed by Jakub Jelinek <jj@ultra.linux.cz>.
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|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
The GNU C Library is free software; you can redistribute it and/or
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|
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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|
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6c4009 |
|
|
Packit |
6c4009 |
The GNU C Library is distributed in the hope that it will be useful,
|
|
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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.
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|
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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|
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6c4009 |
|
|
Packit |
6c4009 |
/* Normally, this uses ((xword - 0x01010101) & 0x80808080) test
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|
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 - 0x01010101) & (~xword) & 0x80808080),
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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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|
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6c4009 |
|
|
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6c4009 |
.text
|
|
Packit |
6c4009 |
.align 4
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Packit |
6c4009 |
|
|
Packit |
6c4009 |
ENTRY(strcat)
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|
Packit |
6c4009 |
mov %o0, %g2
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|
Packit |
6c4009 |
andcc %o0, 3, %g0
|
|
Packit |
6c4009 |
be 30f
|
|
Packit |
6c4009 |
sethi %hi(0x80808080), %o4
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
ldub [%o0], %o5
|
|
Packit |
6c4009 |
cmp %o5, 0
|
|
Packit |
6c4009 |
be 1f
|
|
Packit |
6c4009 |
add %o0, 1, %o0
|
|
Packit |
6c4009 |
andcc %o0, 3, %g0
|
|
Packit |
6c4009 |
be 7f
|
|
Packit |
6c4009 |
or %o4, %lo(0x80808080), %o3
|
|
Packit |
6c4009 |
ldub [%o0], %o5
|
|
Packit |
6c4009 |
cmp %o5, 0
|
|
Packit |
6c4009 |
be 2f
|
|
Packit |
6c4009 |
add %o0, 1, %o0
|
|
Packit |
6c4009 |
andcc %o0, 3, %g0
|
|
Packit |
6c4009 |
be 8f
|
|
Packit |
6c4009 |
sethi %hi(0x01010101), %o4
|
|
Packit |
6c4009 |
ldub [%o0], %o5
|
|
Packit |
6c4009 |
cmp %o5, 0
|
|
Packit |
6c4009 |
be 3f
|
|
Packit |
6c4009 |
add %o0, 1, %o0
|
|
Packit |
6c4009 |
b 9f
|
|
Packit |
6c4009 |
or %o4, %lo(0x01010101), %o2
|
|
Packit |
6c4009 |
1: or %o4, %lo(0x80808080), %o3
|
|
Packit |
6c4009 |
2: sethi %hi(0x01010101), %o4
|
|
Packit |
6c4009 |
3: or %o4, %lo(0x01010101), %o2
|
|
Packit |
6c4009 |
b 3f
|
|
Packit |
6c4009 |
sub %o0, 1, %o0
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
30: or %o4, %lo(0x80808080), %o3
|
|
Packit |
6c4009 |
7: sethi %hi(0x01010101), %o4
|
|
Packit |
6c4009 |
8: or %o4, %lo(0x01010101), %o2
|
|
Packit |
6c4009 |
9: ld [%o0], %o5
|
|
Packit |
6c4009 |
7: sub %o5, %o2, %o4
|
|
Packit |
6c4009 |
#ifdef EIGHTBIT_NOT_RARE
|
|
Packit |
6c4009 |
andn %o4, %o5, %o4
|
|
Packit |
6c4009 |
#endif
|
|
Packit |
6c4009 |
andcc %o4, %o3, %g0
|
|
Packit |
6c4009 |
be 9b
|
|
Packit |
6c4009 |
add %o0, 4, %o0
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
srl %o5, 24, %g5
|
|
Packit |
6c4009 |
andcc %g5, 0xff, %g0
|
|
Packit |
6c4009 |
be 3f
|
|
Packit |
6c4009 |
add %o0, -4, %o0
|
|
Packit |
6c4009 |
srl %o5, 16, %g5
|
|
Packit |
6c4009 |
andcc %g5, 0xff, %g0
|
|
Packit |
6c4009 |
be 3f
|
|
Packit |
6c4009 |
add %o0, 1, %o0
|
|
Packit |
6c4009 |
srl %o5, 8, %g5
|
|
Packit |
6c4009 |
andcc %g5, 0xff, %g0
|
|
Packit |
6c4009 |
be 3f
|
|
Packit |
6c4009 |
add %o0, 1, %o0
|
|
Packit |
6c4009 |
andcc %o5, 0xff, %g0
|
|
Packit |
6c4009 |
add %o0, 2, %o0
|
|
Packit |
6c4009 |
bne,a 7b
|
|
Packit |
6c4009 |
ld [%o0], %o5
|
|
Packit |
6c4009 |
sub %o0, 1, %o0
|
|
Packit |
6c4009 |
3: andcc %o1, 3, %o4
|
|
Packit |
6c4009 |
be 4f
|
|
Packit |
6c4009 |
nop
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
cmp %o4, 2
|
|
Packit |
6c4009 |
be 11f
|
|
Packit |
6c4009 |
cmp %o4, 3
|
|
Packit |
6c4009 |
ldub [%o1], %o5
|
|
Packit |
6c4009 |
add %o1, 1, %o1
|
|
Packit |
6c4009 |
stb %o5, [%o0]
|
|
Packit |
6c4009 |
be 13f
|
|
Packit |
6c4009 |
cmp %o5, 0
|
|
Packit |
6c4009 |
be 0f
|
|
Packit |
6c4009 |
add %o0, 1, %o0
|
|
Packit |
6c4009 |
11: lduh [%o1], %o5
|
|
Packit |
6c4009 |
add %o1, 2, %o1
|
|
Packit |
6c4009 |
srl %o5, 8, %o4
|
|
Packit |
6c4009 |
cmp %o4, 0
|
|
Packit |
6c4009 |
stb %o4, [%o0]
|
|
Packit |
6c4009 |
bne,a 12f
|
|
Packit |
6c4009 |
stb %o5, [%o0 + 1]
|
|
Packit |
6c4009 |
retl
|
|
Packit |
6c4009 |
mov %g2, %o0
|
|
Packit |
6c4009 |
12: andcc %o5, 0xff, %o5
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|
Packit |
6c4009 |
bne 4f
|
|
Packit |
6c4009 |
add %o0, 2, %o0
|
|
Packit |
6c4009 |
retl
|
|
Packit |
6c4009 |
mov %g2, %o0
|
|
Packit |
6c4009 |
13: bne 4f
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|
Packit |
6c4009 |
add %o0, 1, %o0
|
|
Packit |
6c4009 |
retl
|
|
Packit |
6c4009 |
mov %g2, %o0
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|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
4: andcc %o0, 3, %g3
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|
Packit |
6c4009 |
bne 12f
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|
Packit |
6c4009 |
1: ld [%o1], %o5
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|
Packit |
6c4009 |
add %o1, 4, %o1
|
|
Packit |
6c4009 |
sub %o5, %o2, %o4
|
|
Packit |
6c4009 |
#ifdef EIGHTBIT_NOT_RARE
|
|
Packit |
6c4009 |
andn %o4, %o5, %o4
|
|
Packit |
6c4009 |
#endif
|
|
Packit |
6c4009 |
add %o0, 4, %o0
|
|
Packit |
6c4009 |
andcc %o4, %o3, %g0
|
|
Packit |
6c4009 |
be,a 1b
|
|
Packit |
6c4009 |
st %o5, [%o0 - 4]
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
srl %o5, 24, %g5
|
|
Packit |
6c4009 |
andcc %g5, 0xff, %g0
|
|
Packit |
6c4009 |
be 1f
|
|
Packit |
6c4009 |
srl %o5, 16, %g5
|
|
Packit |
6c4009 |
andcc %g5, 0xff, %g0
|
|
Packit |
6c4009 |
be 2f
|
|
Packit |
6c4009 |
srl %o5, 8, %g5
|
|
Packit |
6c4009 |
andcc %g5, 0xff, %g0
|
|
Packit |
6c4009 |
be 3f
|
|
Packit |
6c4009 |
andcc %o5, 0xff, %g0
|
|
Packit |
6c4009 |
bne 1b
|
|
Packit |
6c4009 |
st %o5, [%o0 - 4]
|
|
Packit |
6c4009 |
retl
|
|
Packit |
6c4009 |
mov %g2, %o0
|
|
Packit |
6c4009 |
3: srl %o5, 16, %o5
|
|
Packit |
6c4009 |
sth %o5, [%o0 - 4]
|
|
Packit |
6c4009 |
stb %g0, [%o0 - 2]
|
|
Packit |
6c4009 |
retl
|
|
Packit |
6c4009 |
mov %g2, %o0
|
|
Packit |
6c4009 |
2: srl %o5, 16, %o5
|
|
Packit |
6c4009 |
sth %o5, [%o0 - 4]
|
|
Packit |
6c4009 |
retl
|
|
Packit |
6c4009 |
mov %g2, %o0
|
|
Packit |
6c4009 |
1: stb %g0, [%o0 - 4]
|
|
Packit |
6c4009 |
retl
|
|
Packit |
6c4009 |
mov %g2, %o0
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
12: add %o1, 4, %o1
|
|
Packit |
6c4009 |
sub %o5, %o2, %o4
|
|
Packit |
6c4009 |
cmp %g3, 2
|
|
Packit |
6c4009 |
be 2f
|
|
Packit |
6c4009 |
cmp %g3, 3
|
|
Packit |
6c4009 |
be 3f
|
|
Packit |
6c4009 |
andcc %o4, %o3, %g0
|
|
Packit |
6c4009 |
bne 5f
|
|
Packit |
6c4009 |
srl %o5, 24, %g5
|
|
Packit |
6c4009 |
stb %g5, [%o0]
|
|
Packit |
6c4009 |
sub %o0, 1, %o0
|
|
Packit |
6c4009 |
srl %o5, 8, %g5
|
|
Packit |
6c4009 |
sth %g5, [%o0 + 2]
|
|
Packit |
6c4009 |
1: add %o0, 4, %o0
|
|
Packit |
6c4009 |
4: sll %o5, 24, %g6
|
|
Packit |
6c4009 |
ld [%o1], %o5
|
|
Packit |
6c4009 |
add %o1, 4, %o1
|
|
Packit |
6c4009 |
srl %o5, 8, %g5
|
|
Packit |
6c4009 |
sub %o5, %o2, %o4
|
|
Packit |
6c4009 |
#ifdef EIGHTBIT_NOT_RARE
|
|
Packit |
6c4009 |
andn %o4, %o5, %o4
|
|
Packit |
6c4009 |
#endif
|
|
Packit |
6c4009 |
or %g5, %g6, %g5
|
|
Packit |
6c4009 |
andcc %o4, %o3, %g0
|
|
Packit |
6c4009 |
be,a 1b
|
|
Packit |
6c4009 |
st %g5, [%o0]
|
|
Packit |
6c4009 |
srl %o5, 24, %o4
|
|
Packit |
6c4009 |
andcc %o4, 0xff, %g0
|
|
Packit |
6c4009 |
be 6f
|
|
Packit |
6c4009 |
srl %o5, 16, %o4
|
|
Packit |
6c4009 |
andcc %o4, 0xff, %g0
|
|
Packit |
6c4009 |
be 7f
|
|
Packit |
6c4009 |
srl %o5, 8, %o4
|
|
Packit |
6c4009 |
st %g5, [%o0]
|
|
Packit |
6c4009 |
andcc %o4, 0xff, %g0
|
|
Packit |
6c4009 |
be 0f
|
|
Packit |
6c4009 |
andcc %o5, 0xff, %g0
|
|
Packit |
6c4009 |
1: bne 4b
|
|
Packit |
6c4009 |
add %o0, 4, %o0
|
|
Packit |
6c4009 |
9: stb %g0, [%o0]
|
|
Packit |
6c4009 |
0: retl
|
|
Packit |
6c4009 |
mov %g2, %o0
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
6: srl %g5, 16, %g5
|
|
Packit |
6c4009 |
sth %g5, [%o0]
|
|
Packit |
6c4009 |
retl
|
|
Packit |
6c4009 |
mov %g2, %o0
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
7: srl %g5, 16, %g5
|
|
Packit |
6c4009 |
sth %g5, [%o0]
|
|
Packit |
6c4009 |
stb %g0, [%o0 + 2]
|
|
Packit |
6c4009 |
retl
|
|
Packit |
6c4009 |
mov %g2, %o0
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
5: andcc %g5, 0xff, %g4
|
|
Packit |
6c4009 |
be 9b
|
|
Packit |
6c4009 |
srl %o5, 16, %g5
|
|
Packit |
6c4009 |
andcc %g5, 0xff, %g0
|
|
Packit |
6c4009 |
be 7f
|
|
Packit |
6c4009 |
srl %o5, 8, %g5
|
|
Packit |
6c4009 |
andcc %g5, 0xff, %g0
|
|
Packit |
6c4009 |
stb %g4, [%o0]
|
|
Packit |
6c4009 |
sth %g5, [%o0 + 1]
|
|
Packit |
6c4009 |
sub %o0, 1, %o0
|
|
Packit |
6c4009 |
bne 1b
|
|
Packit |
6c4009 |
andcc %o5, 0xff, %g0
|
|
Packit |
6c4009 |
retl
|
|
Packit |
6c4009 |
mov %g2, %o0
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
7: stb %g4, [%o0]
|
|
Packit |
6c4009 |
stb %g0, [%o0 + 1]
|
|
Packit |
6c4009 |
retl
|
|
Packit |
6c4009 |
mov %g2, %o0
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
2: andcc %o4, %o3, %g0
|
|
Packit |
6c4009 |
bne 5f
|
|
Packit |
6c4009 |
srl %o5, 16, %g5
|
|
Packit |
6c4009 |
sth %g5, [%o0]
|
|
Packit |
6c4009 |
sub %o0, 2, %o0
|
|
Packit |
6c4009 |
1: add %o0, 4, %o0
|
|
Packit |
6c4009 |
4: sll %o5, 16, %g6
|
|
Packit |
6c4009 |
ld [%o1], %o5
|
|
Packit |
6c4009 |
add %o1, 4, %o1
|
|
Packit |
6c4009 |
srl %o5, 16, %g5
|
|
Packit |
6c4009 |
sub %o5, %o2, %o4
|
|
Packit |
6c4009 |
#ifdef EIGHTBIT_NOT_RARE
|
|
Packit |
6c4009 |
andn %o4, %o5, %o4
|
|
Packit |
6c4009 |
#endif
|
|
Packit |
6c4009 |
or %g5, %g6, %g5
|
|
Packit |
6c4009 |
andcc %o4, %o3, %g0
|
|
Packit |
6c4009 |
be,a 1b
|
|
Packit |
6c4009 |
st %g5, [%o0]
|
|
Packit |
6c4009 |
srl %o5, 24, %o4
|
|
Packit |
6c4009 |
andcc %o4, 0xff, %g0
|
|
Packit |
6c4009 |
be 7f
|
|
Packit |
6c4009 |
srl %o5, 16, %o4
|
|
Packit |
6c4009 |
st %g5, [%o0]
|
|
Packit |
6c4009 |
andcc %o4, 0xff, %g0
|
|
Packit |
6c4009 |
be 0b
|
|
Packit |
6c4009 |
srl %o5, 8, %o4
|
|
Packit |
6c4009 |
1: andcc %o4, 0xff, %g0
|
|
Packit |
6c4009 |
be 8f
|
|
Packit |
6c4009 |
andcc %o5, 0xff, %g0
|
|
Packit |
6c4009 |
bne 4b
|
|
Packit |
6c4009 |
add %o0, 4, %o0
|
|
Packit |
6c4009 |
sth %o5, [%o0]
|
|
Packit |
6c4009 |
retl
|
|
Packit |
6c4009 |
mov %g2, %o0
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
7: srl %g5, 16, %g5
|
|
Packit |
6c4009 |
sth %g5, [%o0]
|
|
Packit |
6c4009 |
stb %g0, [%o0 + 2]
|
|
Packit |
6c4009 |
retl
|
|
Packit |
6c4009 |
mov %g2, %o0
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
8: stb %g0, [%o0 + 4]
|
|
Packit |
6c4009 |
retl
|
|
Packit |
6c4009 |
mov %g2, %o0
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
5: srl %o5, 24, %g5
|
|
Packit |
6c4009 |
andcc %g5, 0xff, %g0
|
|
Packit |
6c4009 |
be 9b
|
|
Packit |
6c4009 |
srl %o5, 16, %g5
|
|
Packit |
6c4009 |
andcc %g5, 0xff, %g0
|
|
Packit |
6c4009 |
sth %g5, [%o0]
|
|
Packit |
6c4009 |
sub %o0, 2, %o0
|
|
Packit |
6c4009 |
bne 1b
|
|
Packit |
6c4009 |
srl %o5, 8, %o4
|
|
Packit |
6c4009 |
retl
|
|
Packit |
6c4009 |
mov %g2, %o0
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
3: bne 5f
|
|
Packit |
6c4009 |
srl %o5, 24, %g5
|
|
Packit |
6c4009 |
stb %g5, [%o0]
|
|
Packit |
6c4009 |
sub %o0, 3, %o0
|
|
Packit |
6c4009 |
1: add %o0, 4, %o0
|
|
Packit |
6c4009 |
4: sll %o5, 8, %g6
|
|
Packit |
6c4009 |
ld [%o1], %o5
|
|
Packit |
6c4009 |
add %o1, 4, %o1
|
|
Packit |
6c4009 |
srl %o5, 24, %g5
|
|
Packit |
6c4009 |
sub %o5, %o2, %o4
|
|
Packit |
6c4009 |
#ifdef EIGHTBIT_NOT_RARE
|
|
Packit |
6c4009 |
andn %o4, %o5, %o4
|
|
Packit |
6c4009 |
#endif
|
|
Packit |
6c4009 |
or %g5, %g6, %g5
|
|
Packit |
6c4009 |
andcc %o4, %o3, %g0
|
|
Packit |
6c4009 |
be 1b
|
|
Packit |
6c4009 |
st %g5, [%o0]
|
|
Packit |
6c4009 |
srl %o5, 24, %o4
|
|
Packit |
6c4009 |
andcc %o4, 0xff, %g0
|
|
Packit |
6c4009 |
be 0b
|
|
Packit |
6c4009 |
srl %o5, 16, %o4
|
|
Packit |
6c4009 |
1: andcc %o4, 0xff, %g0
|
|
Packit |
6c4009 |
be 8b
|
|
Packit |
6c4009 |
srl %o5, 8, %o4
|
|
Packit |
6c4009 |
andcc %o4, 0xff, %g0
|
|
Packit |
6c4009 |
be 9f
|
|
Packit |
6c4009 |
andcc %o5, 0xff, %g0
|
|
Packit |
6c4009 |
bne 4b
|
|
Packit |
6c4009 |
add %o0, 4, %o0
|
|
Packit |
6c4009 |
srl %o5, 8, %o5
|
|
Packit |
6c4009 |
sth %o5, [%o0]
|
|
Packit |
6c4009 |
stb %g0, [%o0 + 2]
|
|
Packit |
6c4009 |
retl
|
|
Packit |
6c4009 |
mov %g2, %o0
|
|
Packit |
6c4009 |
9: srl %o5, 8, %o5
|
|
Packit |
6c4009 |
sth %o5, [%o0 + 4]
|
|
Packit |
6c4009 |
retl
|
|
Packit |
6c4009 |
mov %g2, %o0
|
|
Packit |
6c4009 |
5: andcc %g5, 0xff, %g0
|
|
Packit |
6c4009 |
stb %g5, [%o0]
|
|
Packit |
6c4009 |
sub %o0, 3, %o0
|
|
Packit |
6c4009 |
bne 1b
|
|
Packit |
6c4009 |
srl %o5, 16, %o4
|
|
Packit |
6c4009 |
retl
|
|
Packit |
6c4009 |
mov %g2, %o0
|
|
Packit |
6c4009 |
END(strcat)
|
|
Packit |
6c4009 |
libc_hidden_builtin_def (strcat)
|