mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-27 13:10:29 +00:00
78df0fcb80
* sysdeps/x86_64/dl-machine.h (elf_machine_runtime_setup): Declare external functions with hidden attribute. (elf_machine_rela): Optimize. * sysdeps/x86_64/memset.S: New file. * sysdeps/x86_64/bzero.S: New file. * sysdeps/x86_64/stpcpy.S: New file. * sysdeps/x86_64/strcat.S: New file. * sysdeps/x86_64/strchr.S: New file. * sysdeps/x86_64/strcpy.S: New file. * sysdeps/x86_64/strcspn.S: New file. * sysdeps/x86_64/strlen.S: New file. * sysdeps/x86_64/strpbrk.S: New file. * sysdeps/x86_64/strspn.S: New file. * sysdeps/x86_64/strcmp.S: New file. * sysdeps/x86_64/strtok_r.S: New file. * sysdeps/x86_64/strtok.S: New file. * sysdeps/x86_64/memcpy.S: New file. * sysdeps/x86_64/mempcpy.S: New file.
132 lines
3.0 KiB
ArmAsm
132 lines
3.0 KiB
ArmAsm
/* memset/bzero -- set memory area to CH/0
|
|
Optimized version for x86-64.
|
|
Copyright (C) 2002 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Andreas Jaeger <aj@suse.de>.
|
|
|
|
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, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#include <sysdep.h>
|
|
#include "asm-syntax.h"
|
|
#include "bp-sym.h"
|
|
#include "bp-asm.h"
|
|
|
|
/* BEWARE: `#ifdef memset' means that memset is redefined as `bzero' */
|
|
#define BZERO_P (defined memset)
|
|
|
|
/* This is somehow experimental and could made dependend on the cache
|
|
size. */
|
|
#define LARGE $120000
|
|
|
|
.text
|
|
ENTRY (memset)
|
|
#if BZERO_P
|
|
mov %rsi,%rdx /* Adjust parameter. */
|
|
xorq %rsi,%rsi /* Fill with 0s. */
|
|
#endif
|
|
cmp $0x7,%rdx /* Check for small length. */
|
|
mov %rdi,%rcx /* Save ptr as return value. */
|
|
jbe 7f
|
|
|
|
#if BZERO_P
|
|
mov %rsi,%r8 /* Just copy 0. */
|
|
#else
|
|
/* Populate 8 bit data to full 64-bit. */
|
|
movabs $0x0101010101010101,%r8
|
|
movzbl %sil,%eax
|
|
imul %rax,%r8
|
|
#endif
|
|
test $0x7,%edi /* Check for alignment. */
|
|
je 2f
|
|
|
|
.p2align 4
|
|
1: /* Align ptr to 8 byte. */
|
|
mov %sil,(%rcx)
|
|
dec %rdx
|
|
inc %rcx
|
|
test $0x7,%ecx
|
|
jne 1b
|
|
|
|
2: /* Check for really large regions. */
|
|
mov %rdx,%rax
|
|
shr $0x6,%rax
|
|
je 4f
|
|
cmp LARGE, %rdx
|
|
jae 11f
|
|
|
|
.p2align 4
|
|
3: /* Copy 64 bytes. */
|
|
mov %r8,(%rcx)
|
|
mov %r8,0x8(%rcx)
|
|
mov %r8,0x10(%rcx)
|
|
mov %r8,0x18(%rcx)
|
|
mov %r8,0x20(%rcx)
|
|
mov %r8,0x28(%rcx)
|
|
mov %r8,0x30(%rcx)
|
|
mov %r8,0x38(%rcx)
|
|
add $0x40,%rcx
|
|
dec %rax
|
|
jne 3b
|
|
|
|
4: /* Copy final bytes. */
|
|
and $0x3f,%edx
|
|
mov %rdx,%rax
|
|
shr $0x3,%rax
|
|
je 6f
|
|
|
|
5: /* First in chunks of 8 bytes. */
|
|
mov %r8,(%rcx)
|
|
add $0x8,%rcx
|
|
dec %rax
|
|
jne 5b
|
|
6:
|
|
and $0x7,%edx
|
|
7:
|
|
test %rdx,%rdx
|
|
je 9f
|
|
8: /* And finally as bytes (up to 7). */
|
|
mov %sil,(%rcx)
|
|
inc %rcx
|
|
dec %rdx
|
|
jne 8b
|
|
9:
|
|
#if BZERO_P
|
|
nop
|
|
#else
|
|
/* Load result (only if used as memset). */
|
|
mov %rdi,%rax /* start address of destination is result */
|
|
#endif
|
|
retq
|
|
|
|
.p2align 4
|
|
11: /* Copy 64 bytes without polluting the cache. */
|
|
/* We could use movntdq %xmm0,(%rcx) here to further
|
|
speed up for large cases but let's not use XMM registers. */
|
|
movnti %r8,(%rcx)
|
|
movnti %r8,0x8(%rcx)
|
|
movnti %r8,0x10(%rcx)
|
|
movnti %r8,0x18(%rcx)
|
|
movnti %r8,0x20(%rcx)
|
|
movnti %r8,0x28(%rcx)
|
|
movnti %r8,0x30(%rcx)
|
|
movnti %r8,0x38(%rcx)
|
|
add $0x40,%rcx
|
|
dec %rax
|
|
jne 11b
|
|
jmp 4b
|
|
|
|
END (memset)
|