mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-23 13:30:06 +00:00
155 lines
3.4 KiB
ArmAsm
155 lines
3.4 KiB
ArmAsm
/* Set a block of memory to some byte value.
|
|
For SPARC v7.
|
|
Copyright (C) 1996-2013 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by David S. Miller <davem@caip.rutgers.edu> 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 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.
|
|
|
|
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
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <sysdep.h>
|
|
|
|
/* Store 64 bytes at (BASE + OFFSET) using value SOURCE. */
|
|
#define ZERO_BIG_BLOCK(base, offset, source) \
|
|
std source, [base + offset + 0x00]; \
|
|
std source, [base + offset + 0x08]; \
|
|
std source, [base + offset + 0x10]; \
|
|
std source, [base + offset + 0x18]; \
|
|
std source, [base + offset + 0x20]; \
|
|
std source, [base + offset + 0x28]; \
|
|
std source, [base + offset + 0x30]; \
|
|
std source, [base + offset + 0x38];
|
|
|
|
#define ZERO_LAST_BLOCKS(base, offset, source) \
|
|
std source, [base - offset - 0x38]; \
|
|
std source, [base - offset - 0x30]; \
|
|
std source, [base - offset - 0x28]; \
|
|
std source, [base - offset - 0x20]; \
|
|
std source, [base - offset - 0x18]; \
|
|
std source, [base - offset - 0x10]; \
|
|
std source, [base - offset - 0x08]; \
|
|
std source, [base - offset - 0x00];
|
|
|
|
.text
|
|
.align 4
|
|
ENTRY(__bzero)
|
|
b 1f
|
|
mov %g0, %g3
|
|
|
|
3: cmp %o2, 3
|
|
be 2f
|
|
stb %g3, [%o0]
|
|
|
|
cmp %o2, 2
|
|
be 2f
|
|
stb %g3, [%o0 + 0x01]
|
|
|
|
stb %g3, [%o0 + 0x02]
|
|
2: sub %o2, 4, %o2
|
|
add %o1, %o2, %o1
|
|
b 4f
|
|
sub %o0, %o2, %o0
|
|
END(__bzero)
|
|
|
|
ENTRY(memset)
|
|
and %o1, 0xff, %g3
|
|
sll %g3, 8, %g2
|
|
or %g3, %g2, %g3
|
|
sll %g3, 16, %g2
|
|
or %g3, %g2, %g3
|
|
orcc %o2, %g0, %o1
|
|
1: cmp %o1, 7
|
|
bleu 7f
|
|
mov %o0, %g1
|
|
|
|
andcc %o0, 3, %o2
|
|
bne 3b
|
|
4: andcc %o0, 4, %g0
|
|
|
|
be 2f
|
|
mov %g3, %g2
|
|
|
|
st %g3, [%o0]
|
|
sub %o1, 4, %o1
|
|
add %o0, 4, %o0
|
|
2: andcc %o1, 0xffffff80, %o3
|
|
be 9f
|
|
andcc %o1, 0x78, %o2
|
|
4: ZERO_BIG_BLOCK (%o0, 0x00, %g2)
|
|
subcc %o3, 128, %o3
|
|
ZERO_BIG_BLOCK (%o0, 0x40, %g2)
|
|
bne 4b
|
|
add %o0, 128, %o0
|
|
|
|
orcc %o2, %g0, %g0
|
|
9: be 6f
|
|
andcc %o1, 7, %o1
|
|
|
|
mov %o7, %g4
|
|
101: call 100f
|
|
srl %o2, 1, %o3
|
|
mov %g4, %o7
|
|
jmpl %o4 + (20f + 64 - 101b), %g0
|
|
add %o0, %o2, %o0
|
|
|
|
100: retl
|
|
sub %o7, %o3, %o4
|
|
|
|
20: ZERO_LAST_BLOCKS(%o0, 0x48, %g2)
|
|
ZERO_LAST_BLOCKS(%o0, 0x08, %g2)
|
|
|
|
6: be 8f
|
|
andcc %o1, 4, %g0
|
|
be 1f
|
|
andcc %o1, 2, %g0
|
|
st %g3, [%o0]
|
|
add %o0, 4, %o0
|
|
1: be 1f
|
|
andcc %o1, 1, %g0
|
|
sth %g3, [%o0]
|
|
add %o0, 2, %o0
|
|
1: bne,a 8f
|
|
stb %g3, [%o0]
|
|
8: retl
|
|
mov %g1, %o0
|
|
7: orcc %o1, 0, %g0
|
|
be 0f
|
|
subcc %o1, 1, %o1
|
|
stb %g3, [%o0]
|
|
be 0f
|
|
subcc %o1, 1, %o1
|
|
stb %g3, [%o0 + 1]
|
|
be 0f
|
|
subcc %o1, 1, %o1
|
|
stb %g3, [%o0 + 2]
|
|
be 0f
|
|
subcc %o1, 1, %o1
|
|
stb %g3, [%o0 + 3]
|
|
be 0f
|
|
subcc %o1, 1, %o1
|
|
stb %g3, [%o0 + 4]
|
|
be 0f
|
|
subcc %o1, 1, %o1
|
|
stb %g3, [%o0 + 5]
|
|
be 0f
|
|
subcc %o1, 1, %o1
|
|
stb %g3, [%o0 + 6]
|
|
0: retl
|
|
nop
|
|
END(memset)
|
|
libc_hidden_builtin_def (memset)
|
|
|
|
weak_alias (__bzero, bzero)
|