mirror of
https://sourceware.org/git/glibc.git
synced 2025-11-06 19:29:35 +03:00
5a82c74822
Also, change sources.redhat.com to sourceware.org.
This patch was automatically generated by running the following shell
script, which uses GNU sed, and which avoids modifying files imported
from upstream:
sed -ri '
s,(http|ftp)(://(.*\.)?(gnu|fsf|sourceware)\.org($|[^.]|\.[^a-z])),https\2,g
s,(http|ftp)(://(.*\.)?)sources\.redhat\.com($|[^.]|\.[^a-z]),https\2sourceware.org\4,g
' \
$(find $(git ls-files) -prune -type f \
! -name '*.po' \
! -name 'ChangeLog*' \
! -path COPYING ! -path COPYING.LIB \
! -path manual/fdl-1.3.texi ! -path manual/lgpl-2.1.texi \
! -path manual/texinfo.tex ! -path scripts/config.guess \
! -path scripts/config.sub ! -path scripts/install-sh \
! -path scripts/mkinstalldirs ! -path scripts/move-if-change \
! -path INSTALL ! -path locale/programs/charmap-kw.h \
! -path po/libc.pot ! -path sysdeps/gnu/errlist.c \
! '(' -name configure \
-execdir test -f configure.ac -o -f configure.in ';' ')' \
! '(' -name preconfigure \
-execdir test -f preconfigure.ac ';' ')' \
-print)
and then by running 'make dist-prepare' to regenerate files built
from the altered files, and then executing the following to cleanup:
chmod a+x sysdeps/unix/sysv/linux/riscv/configure
# Omit irrelevant whitespace and comment-only changes,
# perhaps from a slightly-different Autoconf version.
git checkout -f \
sysdeps/csky/configure \
sysdeps/hppa/configure \
sysdeps/riscv/configure \
sysdeps/unix/sysv/linux/csky/configure
# Omit changes that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/powerpc/powerpc64/ppc-mcount.S: trailing lines
git checkout -f \
sysdeps/powerpc/powerpc64/ppc-mcount.S \
sysdeps/unix/sysv/linux/s390/s390-64/syscall.S
# Omit change that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S: last line does not end in newline
git checkout -f sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S
117 lines
4.1 KiB
C
117 lines
4.1 KiB
C
/* memcopy.h -- definitions for memory copy functions. Generic C version.
|
|
Copyright (C) 1991-2019 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 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/>. */
|
|
|
|
/* The strategy of the memory functions is:
|
|
|
|
1. Copy bytes until the destination pointer is aligned.
|
|
|
|
2. Copy words in unrolled loops. If the source and destination
|
|
are not aligned in the same way, use word memory operations,
|
|
but shift and merge two read words before writing.
|
|
|
|
3. Copy the few remaining bytes.
|
|
|
|
This is fast on processors that have at least 10 registers for
|
|
allocation by GCC, and that can access memory at reg+const in one
|
|
instruction.
|
|
|
|
I made an "exhaustive" test of this memmove when I wrote it,
|
|
exhaustive in the sense that I tried all alignment and length
|
|
combinations, with and without overlap. */
|
|
|
|
#include <sysdeps/generic/memcopy.h>
|
|
|
|
/* The macros defined in this file are:
|
|
|
|
BYTE_COPY_FWD(dst_beg_ptr, src_beg_ptr, nbytes_to_copy)
|
|
|
|
BYTE_COPY_BWD(dst_end_ptr, src_end_ptr, nbytes_to_copy)
|
|
|
|
WORD_COPY_FWD(dst_beg_ptr, src_beg_ptr, nbytes_remaining, nbytes_to_copy)
|
|
|
|
WORD_COPY_BWD(dst_end_ptr, src_end_ptr, nbytes_remaining, nbytes_to_copy)
|
|
|
|
MERGE(old_word, sh_1, new_word, sh_2)
|
|
[I fail to understand. I feel stupid. --roland]
|
|
*/
|
|
|
|
|
|
/* Threshold value for when to enter the unrolled loops. */
|
|
#undef OP_T_THRES
|
|
#define OP_T_THRES 16
|
|
|
|
/* Copy exactly NBYTES bytes from SRC_BP to DST_BP,
|
|
without any assumptions about alignment of the pointers. */
|
|
#undef BYTE_COPY_FWD
|
|
#define BYTE_COPY_FWD(dst_bp, src_bp, nbytes) \
|
|
do \
|
|
{ \
|
|
size_t __nbytes = (nbytes); \
|
|
if (__nbytes & 1) \
|
|
{ \
|
|
((byte *) dst_bp)[0] = ((byte *) src_bp)[0]; \
|
|
src_bp += 1; \
|
|
dst_bp += 1; \
|
|
__nbytes -= 1; \
|
|
} \
|
|
while (__nbytes > 0) \
|
|
{ \
|
|
byte __x = ((byte *) src_bp)[0]; \
|
|
byte __y = ((byte *) src_bp)[1]; \
|
|
src_bp += 2; \
|
|
__nbytes -= 2; \
|
|
((byte *) dst_bp)[0] = __x; \
|
|
((byte *) dst_bp)[1] = __y; \
|
|
dst_bp += 2; \
|
|
} \
|
|
} while (0)
|
|
|
|
/* Copy exactly NBYTES_TO_COPY bytes from SRC_END_PTR to DST_END_PTR,
|
|
beginning at the bytes right before the pointers and continuing towards
|
|
smaller addresses. Don't assume anything about alignment of the
|
|
pointers. */
|
|
#undef BYTE_COPY_BWD
|
|
#define BYTE_COPY_BWD(dst_ep, src_ep, nbytes) \
|
|
do \
|
|
{ \
|
|
size_t __nbytes = (nbytes); \
|
|
if (__nbytes & 1) \
|
|
{ \
|
|
src_ep -= 1; \
|
|
dst_ep -= 1; \
|
|
((byte *) dst_ep)[0] = ((byte *) src_ep)[0]; \
|
|
__nbytes -= 1; \
|
|
} \
|
|
while (__nbytes > 0) \
|
|
{ \
|
|
byte __x, __y; \
|
|
src_ep -= 2; \
|
|
__y = ((byte *) src_ep)[1]; \
|
|
__x = ((byte *) src_ep)[0]; \
|
|
dst_ep -= 2; \
|
|
__nbytes -= 2; \
|
|
((byte *) dst_ep)[1] = __y; \
|
|
((byte *) dst_ep)[0] = __x; \
|
|
} \
|
|
} while (0)
|
|
|
|
/* The powerpc memcpy implementation is safe to use for memmove. */
|
|
#undef MEMCPY_OK_FOR_FWD_MEMMOVE
|
|
#define MEMCPY_OK_FOR_FWD_MEMMOVE 1
|