mirror of
git://sourceware.org/git/glibc.git
synced 2024-11-21 01:12:26 +08:00
6dbb7062ff
1998-08-25 11:43 Ulrich Drepper <drepper@cygnus.com>
* elf/elf.h: Add syminfo stuff and other DT_* from Solaris' ELF.
1998-08-25 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* argp/argp.h: Use __inline__ not inline.
* sysdeps/i386/bits/select.h (FD_ZERO): Rewrite asm not to indicate
an input register as being clobbered.
* sysdeps/i386/memset.c (memset): Likewise.
* sysdeps/i386/bzero.c (__bzero): Likewise.
* sysdeps/i386/memcopy.h ({BYTE,WORD}_COPY_[FB]WD): Likewise.
1998-08-25 Andreas Jaeger <aj@arthur.rhein-neckar.de>
* stdlib/jrand48_r.c (__jrand48_r): Set also upper half of result.
Fixes PR libc/757 (Reported by Michael Creutz <creutz@bnl.gov).
94 lines
3.5 KiB
C
94 lines
3.5 KiB
C
/* memcopy.h -- definitions for memory copy functions. i386 version.
|
|
Copyright (C) 1991, 1997, 1998 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Torbjorn Granlund (tege@sics.se).
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Library General Public License as
|
|
published by the Free Software Foundation; either version 2 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
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If not,
|
|
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
#include <sysdeps/generic/memcopy.h>
|
|
|
|
#undef OP_T_THRES
|
|
#define OP_T_THRES 8
|
|
|
|
#undef BYTE_COPY_FWD
|
|
#define BYTE_COPY_FWD(dst_bp, src_bp, nbytes) \
|
|
do { \
|
|
int __d0; \
|
|
asm volatile(/* Clear the direction flag, so copying goes forward. */ \
|
|
"cld\n" \
|
|
/* Copy bytes. */ \
|
|
"rep\n" \
|
|
"movsb" : \
|
|
"=D" (dst_bp), "=S" (src_bp), "=c" (__d0) : \
|
|
"0" (dst_bp), "1" (src_bp), "2" (nbytes) : \
|
|
"memory"); \
|
|
} while (0)
|
|
|
|
#undef BYTE_COPY_BWD
|
|
#define BYTE_COPY_BWD(dst_ep, src_ep, nbytes) \
|
|
do \
|
|
{ \
|
|
int __d0; \
|
|
asm volatile(/* Set the direction flag, so copying goes backwards. */ \
|
|
"std\n" \
|
|
/* Copy bytes. */ \
|
|
"rep\n" \
|
|
"movsb\n" \
|
|
/* Clear the dir flag. Convention says it should be 0. */ \
|
|
"cld" : \
|
|
"=D" (dst_ep), "=S" (src_ep), "=c" (__d0) : \
|
|
"0" (dst_ep - 1), "1" (src_ep - 1), "2" (nbytes) : \
|
|
"memory"); \
|
|
dst_ep += 1; \
|
|
src_ep += 1; \
|
|
} while (0)
|
|
|
|
#undef WORD_COPY_FWD
|
|
#define WORD_COPY_FWD(dst_bp, src_bp, nbytes_left, nbytes) \
|
|
do \
|
|
{ \
|
|
int __d0; \
|
|
asm volatile(/* Clear the direction flag, so copying goes forward. */ \
|
|
"cld\n" \
|
|
/* Copy longwords. */ \
|
|
"rep\n" \
|
|
"movsl" : \
|
|
"=D" (dst_bp), "=S" (src_bp), "=c" (__d0) : \
|
|
"0" (dst_bp), "1" (src_bp), "2" ((nbytes) / 4) : \
|
|
"memory"); \
|
|
(nbytes_left) = (nbytes) % 4; \
|
|
} while (0)
|
|
|
|
#undef WORD_COPY_BWD
|
|
#define WORD_COPY_BWD(dst_ep, src_ep, nbytes_left, nbytes) \
|
|
do \
|
|
{ \
|
|
int __d0; \
|
|
asm volatile(/* Set the direction flag, so copying goes backwards. */ \
|
|
"std\n" \
|
|
/* Copy longwords. */ \
|
|
"rep\n" \
|
|
"movsl\n" \
|
|
/* Clear the dir flag. Convention says it should be 0. */ \
|
|
"cld" : \
|
|
"=D" (dst_ep), "=S" (src_ep), "=c" (__d0) : \
|
|
"0" (dst_ep - 4), "1" (src_ep - 4), "2" ((nbytes) / 4) : \
|
|
"memory"); \
|
|
dst_ep += 4; \
|
|
src_ep += 4; \
|
|
(nbytes_left) = (nbytes) % 4; \
|
|
} while (0)
|