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/* Set a block of memory to some byte value.
For SPARC v7.
Copyright (C) 1996-2022 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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
<https://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)
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