1999-03-29 13:25:15 +00:00
|
|
|
/* Copy SRC to DEST returning the address of the terminating '\0' in DEST.
|
|
|
|
|
For SPARC v9.
|
2002-08-04 01:22:11 +00:00
|
|
|
Copyright (C) 1998, 1999, 2002 Free Software Foundation, Inc.
|
1999-03-29 13:25:15 +00:00
|
|
|
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
|
2001-07-06 04:58:11 +00:00
|
|
|
modify it under the terms of the GNU Lesser General Public
|
|
|
|
|
License as published by the Free Software Foundation; either
|
|
|
|
|
version 2.1 of the License, or (at your option) any later version.
|
1999-03-29 13:25:15 +00:00
|
|
|
|
|
|
|
|
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
|
2001-07-06 04:58:11 +00:00
|
|
|
Lesser General Public License for more details.
|
1999-03-29 13:25:15 +00:00
|
|
|
|
2001-07-06 04:58:11 +00:00
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
|
|
|
License along with the GNU C Library; if not, write to the Free
|
|
|
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
|
|
|
02111-1307 USA. */
|
1999-03-29 13:25:15 +00:00
|
|
|
|
|
|
|
|
#include <sysdep.h>
|
|
|
|
|
#include <asm/asi.h>
|
1999-07-27 04:43:32 +00:00
|
|
|
#ifndef XCC
|
|
|
|
|
.register %g2, #scratch
|
|
|
|
|
.register %g3, #scratch
|
|
|
|
|
.register %g7, #scratch
|
|
|
|
|
#endif
|
1999-03-29 13:25:15 +00:00
|
|
|
|
|
|
|
|
/* Normally, this uses
|
|
|
|
|
((xword - 0x0101010101010101) & 0x8080808080808080) test
|
|
|
|
|
to find out if any byte in xword could be zero. This is fast, but
|
|
|
|
|
also gives false alarm for any byte in range 0x81-0xff. It does
|
|
|
|
|
not matter for correctness, as if this test tells us there could
|
|
|
|
|
be some zero byte, we check it byte by byte, but if bytes with
|
|
|
|
|
high bits set are common in the strings, then this will give poor
|
|
|
|
|
performance. You can #define EIGHTBIT_NOT_RARE and the algorithm
|
|
|
|
|
will use one tick slower, but more precise test
|
|
|
|
|
((xword - 0x0101010101010101) & (~xword) & 0x8080808080808080),
|
|
|
|
|
which does not give any false alarms (but if some bits are set,
|
|
|
|
|
one cannot assume from it which bytes are zero and which are not).
|
|
|
|
|
It is yet to be measured, what is the correct default for glibc
|
|
|
|
|
in these days for an average user.
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
.text
|
|
|
|
|
.align 32
|
|
|
|
|
ENTRY(__stpcpy)
|
|
|
|
|
sethi %hi(0x01010101), %g1 /* IEU0 Group */
|
|
|
|
|
or %g1, %lo(0x01010101), %g1 /* IEU0 Group */
|
|
|
|
|
andcc %o0, 7, %g0 /* IEU1 */
|
|
|
|
|
sllx %g1, 32, %g2 /* IEU0 Group */
|
|
|
|
|
|
|
|
|
|
bne,pn %icc, 12f /* CTI */
|
|
|
|
|
andcc %o1, 7, %g3 /* IEU1 */
|
|
|
|
|
or %g1, %g2, %g1 /* IEU0 Group */
|
|
|
|
|
bne,pn %icc, 14f /* CTI */
|
|
|
|
|
|
|
|
|
|
sllx %g1, 7, %g2 /* IEU0 Group */
|
|
|
|
|
1: ldx [%o1], %o3 /* Load */
|
|
|
|
|
add %o1, 8, %o1 /* IEU1 */
|
|
|
|
|
2: mov %o3, %g3 /* IEU0 Group */
|
|
|
|
|
|
|
|
|
|
sub %o3, %g1, %o2 /* IEU1 */
|
|
|
|
|
3: ldxa [%o1] ASI_PNF, %o3 /* Load */
|
|
|
|
|
#ifdef EIGHTBIT_NOT_RARE
|
|
|
|
|
andn %o2, %g3, %o2 /* IEU0 Group */
|
|
|
|
|
#endif
|
|
|
|
|
add %o0, 8, %o0 /* IEU0 Group */
|
|
|
|
|
andcc %o2, %g2, %g0 /* IEU1 */
|
|
|
|
|
|
|
|
|
|
add %o1, 8, %o1 /* IEU0 Group */
|
|
|
|
|
be,a,pt %xcc, 2b /* CTI */
|
|
|
|
|
stx %g3, [%o0 - 8] /* Store */
|
|
|
|
|
srlx %g3, 56, %g5 /* IEU0 Group */
|
|
|
|
|
|
|
|
|
|
andcc %g5, 0xff, %g0 /* IEU1 Group */
|
|
|
|
|
be,pn %icc, 11f /* CTI */
|
|
|
|
|
srlx %g3, 48, %g4 /* IEU0 */
|
|
|
|
|
andcc %g4, 0xff, %g0 /* IEU1 Group */
|
|
|
|
|
|
|
|
|
|
be,pn %icc, 10f /* CTI */
|
|
|
|
|
srlx %g3, 40, %g5 /* IEU0 */
|
|
|
|
|
andcc %g5, 0xff, %g0 /* IEU1 Group */
|
|
|
|
|
be,pn %icc, 9f /* CTI */
|
|
|
|
|
|
|
|
|
|
srlx %g3, 32, %g4 /* IEU0 */
|
|
|
|
|
andcc %g4, 0xff, %g0 /* IEU1 Group */
|
|
|
|
|
be,pn %icc, 8f /* CTI */
|
|
|
|
|
srlx %g3, 24, %g5 /* IEU0 */
|
|
|
|
|
|
|
|
|
|
andcc %g5, 0xff, %g0 /* IEU1 Group */
|
|
|
|
|
be,pn %icc, 7f /* CTI */
|
|
|
|
|
srlx %g3, 16, %g4 /* IEU0 */
|
|
|
|
|
andcc %g4, 0xff, %g0 /* IEU1 Group */
|
|
|
|
|
|
|
|
|
|
be,pn %icc, 6f /* CTI */
|
|
|
|
|
srlx %g3, 8, %g5 /* IEU0 */
|
|
|
|
|
andcc %g5, 0xff, %g0 /* IEU1 Group */
|
|
|
|
|
be,pn %icc, 5f /* CTI */
|
|
|
|
|
|
|
|
|
|
sub %o3, %g1, %o2 /* IEU0 */
|
|
|
|
|
stx %g3, [%o0 - 8] /* Store Group */
|
|
|
|
|
andcc %g3, 0xff, %g0 /* IEU1 */
|
|
|
|
|
bne,pt %icc, 3b /* CTI */
|
|
|
|
|
|
|
|
|
|
mov %o3, %g3 /* IEU0 Group */
|
|
|
|
|
4: retl /* CTI+IEU1 Group */
|
|
|
|
|
sub %o0, 1, %o0 /* IEU0 */
|
|
|
|
|
|
|
|
|
|
.align 16
|
|
|
|
|
6: ba,pt %xcc, 23f /* CTI Group */
|
|
|
|
|
sub %o0, 3, %g7 /* IEU0 */
|
|
|
|
|
5: sub %o0, 2, %g7 /* IEU0 Group */
|
|
|
|
|
stb %g5, [%o0 - 2] /* Store */
|
|
|
|
|
|
|
|
|
|
srlx %g3, 16, %g4 /* IEU0 Group */
|
|
|
|
|
23: sth %g4, [%o0 - 4] /* Store */
|
|
|
|
|
srlx %g3, 32, %g4 /* IEU0 Group */
|
|
|
|
|
stw %g4, [%o0 - 8] /* Store */
|
|
|
|
|
|
|
|
|
|
retl /* CTI+IEU1 Group */
|
|
|
|
|
mov %g7, %o0 /* IEU0 */
|
|
|
|
|
8: ba,pt %xcc, 24f /* CTI Group */
|
|
|
|
|
sub %o0, 5, %g7 /* IEU0 */
|
|
|
|
|
|
|
|
|
|
7: sub %o0, 4, %g7 /* IEU0 Group */
|
|
|
|
|
stb %g5, [%o0 - 4] /* Store */
|
|
|
|
|
srlx %g3, 32, %g4 /* IEU0 Group */
|
|
|
|
|
24: stw %g4, [%o0 - 8] /* Store */
|
|
|
|
|
|
|
|
|
|
retl /* CTI+IEU1 Group */
|
|
|
|
|
mov %g7, %o0 /* IEU0 */
|
|
|
|
|
10: ba,pt %xcc, 25f /* CTI Group */
|
|
|
|
|
sub %o0, 7, %g7 /* IEU0 */
|
|
|
|
|
|
|
|
|
|
9: sub %o0, 6, %g7 /* IEU0 Group */
|
|
|
|
|
stb %g5, [%o0 - 6] /* Store */
|
|
|
|
|
srlx %g3, 48, %g4 /* IEU0 */
|
|
|
|
|
25: sth %g4, [%o0 - 8] /* Store Group */
|
|
|
|
|
|
|
|
|
|
retl /* CTI+IEU1 Group */
|
|
|
|
|
mov %g7, %o0 /* IEU0 */
|
|
|
|
|
11: stb %g5, [%o0 - 8] /* Store Group */
|
|
|
|
|
retl /* CTI+IEU1 Group */
|
|
|
|
|
|
|
|
|
|
sub %o0, 8, %o0 /* IEU0 */
|
|
|
|
|
|
|
|
|
|
.align 16
|
|
|
|
|
12: or %g1, %g2, %g1 /* IEU0 Group */
|
|
|
|
|
ldub [%o1], %o3 /* Load */
|
|
|
|
|
sllx %g1, 7, %g2 /* IEU0 Group */
|
|
|
|
|
stb %o3, [%o0] /* Store Group */
|
|
|
|
|
|
|
|
|
|
13: add %o0, 1, %o0 /* IEU0 */
|
|
|
|
|
add %o1, 1, %o1 /* IEU1 */
|
|
|
|
|
andcc %o3, 0xff, %g0 /* IEU1 Group */
|
|
|
|
|
be,pn %icc, 4b /* CTI */
|
|
|
|
|
|
|
|
|
|
lduba [%o1] ASI_PNF, %o3 /* Load */
|
|
|
|
|
andcc %o0, 7, %g0 /* IEU1 Group */
|
|
|
|
|
bne,a,pt %icc, 13b /* CTI */
|
|
|
|
|
stb %o3, [%o0] /* Store */
|
|
|
|
|
|
|
|
|
|
andcc %o1, 7, %g3 /* IEU1 Group */
|
|
|
|
|
be,a,pt %icc, 1b /* CTI */
|
|
|
|
|
ldx [%o1], %o3 /* Load */
|
|
|
|
|
14: orcc %g0, 64, %g4 /* IEU1 Group */
|
|
|
|
|
|
|
|
|
|
sllx %g3, 3, %g5 /* IEU0 */
|
|
|
|
|
sub %o1, %g3, %o1 /* IEU0 Group */
|
|
|
|
|
sub %g4, %g5, %g4 /* IEU1 */
|
|
|
|
|
/* %g1 = 0101010101010101 *
|
|
|
|
|
* %g2 = 8080808080808080 *
|
|
|
|
|
* %g3 = source alignment *
|
|
|
|
|
* %g5 = number of bits to shift left *
|
|
|
|
|
* %g4 = number of bits to shift right */
|
|
|
|
|
ldxa [%o1] ASI_PNF, %o5 /* Load Group */
|
|
|
|
|
|
|
|
|
|
addcc %o1, 8, %o1 /* IEU1 */
|
|
|
|
|
15: sllx %o5, %g5, %o3 /* IEU0 Group */
|
|
|
|
|
ldxa [%o1] ASI_PNF, %o5 /* Load */
|
|
|
|
|
srlx %o5, %g4, %o4 /* IEU0 Group */
|
|
|
|
|
|
|
|
|
|
add %o0, 8, %o0 /* IEU1 */
|
|
|
|
|
or %o3, %o4, %o3 /* IEU0 Group */
|
|
|
|
|
add %o1, 8, %o1 /* IEU1 */
|
|
|
|
|
sub %o3, %g1, %o4 /* IEU0 Group */
|
|
|
|
|
|
|
|
|
|
#ifdef EIGHTBIT_NOT_RARE
|
|
|
|
|
andn %o4, %o3, %o4 /* IEU0 Group */
|
|
|
|
|
#endif
|
|
|
|
|
andcc %o4, %g2, %g0 /* IEU1 Group */
|
|
|
|
|
be,a,pt %xcc, 15b /* CTI */
|
|
|
|
|
stx %o3, [%o0 - 8] /* Store */
|
|
|
|
|
srlx %o3, 56, %o4 /* IEU0 Group */
|
|
|
|
|
|
|
|
|
|
andcc %o4, 0xff, %g0 /* IEU1 Group */
|
|
|
|
|
be,pn %icc, 22f /* CTI */
|
|
|
|
|
srlx %o3, 48, %o4 /* IEU0 */
|
|
|
|
|
andcc %o4, 0xff, %g0 /* IEU1 Group */
|
|
|
|
|
|
|
|
|
|
be,pn %icc, 21f /* CTI */
|
|
|
|
|
srlx %o3, 40, %o4 /* IEU0 */
|
|
|
|
|
andcc %o4, 0xff, %g0 /* IEU1 Group */
|
|
|
|
|
be,pn %icc, 20f /* CTI */
|
|
|
|
|
|
|
|
|
|
srlx %o3, 32, %o4 /* IEU0 */
|
|
|
|
|
andcc %o4, 0xff, %g0 /* IEU1 Group */
|
|
|
|
|
be,pn %icc, 19f /* CTI */
|
|
|
|
|
srlx %o3, 24, %o4 /* IEU0 */
|
|
|
|
|
|
|
|
|
|
andcc %o4, 0xff, %g0 /* IEU1 Group */
|
|
|
|
|
be,pn %icc, 18f /* CTI */
|
|
|
|
|
srlx %o3, 16, %o4 /* IEU0 */
|
|
|
|
|
andcc %o4, 0xff, %g0 /* IEU1 Group */
|
|
|
|
|
|
|
|
|
|
be,pn %icc, 17f /* CTI */
|
|
|
|
|
srlx %o3, 8, %o4 /* IEU0 */
|
|
|
|
|
andcc %o4, 0xff, %g0 /* IEU1 Group */
|
|
|
|
|
be,pn %icc, 16f /* CTI */
|
|
|
|
|
|
|
|
|
|
andcc %o3, 0xff, %g0 /* IEU1 Group */
|
|
|
|
|
bne,pn %icc, 15b /* CTI */
|
|
|
|
|
stx %o3, [%o0 - 8] /* Store */
|
|
|
|
|
retl /* CTI+IEU1 Group */
|
|
|
|
|
|
|
|
|
|
sub %o0, 1, %o0 /* IEU0 */
|
|
|
|
|
|
|
|
|
|
.align 16
|
|
|
|
|
17: ba,pt %xcc, 26f /* CTI Group */
|
|
|
|
|
subcc %o0, 3, %g7 /* IEU1 */
|
|
|
|
|
18: ba,pt %xcc, 27f /* CTI Group */
|
|
|
|
|
subcc %o0, 4, %g7 /* IEU1 */
|
|
|
|
|
|
|
|
|
|
19: ba,pt %xcc, 28f /* CTI Group */
|
|
|
|
|
subcc %o0, 5, %g7 /* IEU1 */
|
|
|
|
|
16: subcc %o0, 2, %g7 /* IEU1 Group */
|
|
|
|
|
srlx %o3, 8, %o4 /* IEU0 */
|
|
|
|
|
|
|
|
|
|
stb %o4, [%o0 - 2] /* Store */
|
|
|
|
|
26: srlx %o3, 16, %o4 /* IEU0 Group */
|
|
|
|
|
stb %o4, [%o0 - 3] /* Store */
|
|
|
|
|
27: srlx %o3, 24, %o4 /* IEU0 Group */
|
|
|
|
|
|
|
|
|
|
stb %o4, [%o0 - 4] /* Store */
|
|
|
|
|
28: srlx %o3, 32, %o4 /* IEU0 Group */
|
|
|
|
|
stw %o4, [%o0 - 8] /* Store */
|
|
|
|
|
retl /* CTI+IEU1 Group */
|
|
|
|
|
|
|
|
|
|
mov %g7, %o0 /* IEU0 */
|
|
|
|
|
|
|
|
|
|
.align 16
|
|
|
|
|
21: ba,pt %xcc, 29f /* CTI Group */
|
|
|
|
|
subcc %o0, 7, %g7 /* IEU1 */
|
|
|
|
|
22: ba,pt %xcc, 30f /* CTI Group */
|
|
|
|
|
subcc %o0, 8, %g7 /* IEU1 */
|
|
|
|
|
|
|
|
|
|
20: subcc %o0, 6, %g7 /* IEU1 Group */
|
|
|
|
|
srlx %o3, 40, %o4 /* IEU0 */
|
|
|
|
|
stb %o4, [%o0 - 6] /* Store */
|
|
|
|
|
29: srlx %o3, 48, %o4 /* IEU0 Group */
|
|
|
|
|
|
|
|
|
|
stb %o4, [%o0 - 7] /* Store */
|
|
|
|
|
30: srlx %o3, 56, %o4 /* IEU0 Group */
|
|
|
|
|
stb %o4, [%o0 - 8] /* Store */
|
|
|
|
|
retl /* CTI+IEU1 Group */
|
|
|
|
|
|
|
|
|
|
mov %g7, %o0 /* IEU0 */
|
|
|
|
|
END(__stpcpy)
|
|
|
|
|
|
|
|
|
|
weak_alias (__stpcpy, stpcpy)
|
2002-08-04 01:22:11 +00:00
|
|
|
libc_hidden_def (__stpcpy)
|
