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8f5ca04bc7
* malloc/malloc.c (_malloc_internal): Performance fix. Move
if statement out of loop.
* stdio/_itoa.c, stdio/_itoa.h: Complete rewrite. Much faster
implementation using GMP functions. Contributed by
Torbjorn Granlund and Ulrich Drepper.
* stdio/test_rdwr.c: Include <errno.h>.
* sysdeps/i386/i586/Implies: New file.
New highly optimized string functions for i[345]86.
* sysdeps/i386/memchr.S, sysdeps/i386/memcmp.S: New files.
* sysdeps/i386/stpcpy.S, sysdeps/i386/stpncpy.S: New files.
* sysdeps/i386/strchr.S, sysdeps/i386/strcspn.S: New files.
* sysdeps/i386/strpbrk.S, sysdeps/i386/strrchr.S: New files.
* sysdeps/i386/strspn.S, sysdeps/i386/i486/strcat.S: New files.
* sysdeps/i386/i486/strlen.S, sysdeps/i386/i586/strchr.S: New files.
* sysdeps/i386/i586/strlen.S: New file.
* sysdeps/i386/memchr.c: Removed. There is now an assembler version.
* sysdeps/i386/i586/memcopy.h (WORD_COPY_BWD): Parameters did
not correspond to used values.
* sysdeps/unix/sysv/linux/nfs/nfs.h: New file. Simply a wrapper
around a kernel header file.
* sysdeps/unix/sysv/linux/Dist: Add it.
* sysdeps/unix/sysv/linux/Makefile [$(subdir)=sunrpc] (headers):
Likewise.
* sysdeps/unix/sysv/linux/local_lim.h: Rewrite. Instead of
defining ourself we use a kernel header file.
* sysdeps/unix/sysv/linux/i386/sysdep.h (DO_CALL): Optimize system
call handler for i586.
* sysdeps/unix/sysv/linux/sys/param.h: Add copyright and clean up.
Sat Oct 14 02:52:36 1995 Ulrich Drepper <drepper@ipd.info.uni-karlsruhe.de>
* malloc/malloc.c (_malloc_internal): Performance fix. Move
if statement out of loop.
* stdio/_itoa.c, stdio/_itoa.h: Complete rewrite. Much faster
implementation using GMP functions. Contributed by
Torbjorn Granlund and Ulrich Drepper.
* stdio/test_rdwr.c: Include <errno.h>.
* sysdeps/i386/i586/Implies: New file.
New highly optimized string functions for i[345]86.
* sysdeps/i386/memchr.S, sysdeps/i386/memcmp.S: New files.
* sysdeps/i386/stpcpy.S, sysdeps/i386/stpncpy.S: New files.
* sysdeps/i386/strchr.S, sysdeps/i386/strcspn.S: New files.
* sysdeps/i386/strpbrk.S, sysdeps/i386/strrchr.S: New files.
* sysdeps/i386/strspn.S, sysdeps/i386/i486/strcat.S: New files.
* sysdeps/i386/i486/strlen.S, sysdeps/i386/i586/strchr.S: New files.
* sysdeps/i386/i586/strlen.S: New file.
* sysdeps/i386/memchr.c: Removed. There is now an assembler version.
* sysdeps/i386/i586/memcopy.h (WORD_COPY_BWD): Parameters did
not correspond to used values.
* sysdeps/unix/sysv/linux/nfs/nfs.h: New file. Simply a wrapper
around a kernel header file.
* sysdeps/unix/sysv/linux/Dist: Add it.
* sysdeps/unix/sysv/linux/Makefile [$(subdir)=sunrpc] (headers):
Likewise.
* sysdeps/unix/sysv/linux/local_lim.h: Rewrite. Instead of
defining ourself we use a kernel header file.
* sysdeps/unix/sysv/linux/i386/sysdep.h (DO_CALL): Optimize system
call handler for i586.
* sysdeps/unix/sysv/linux/sys/param.h: Add copyright and clean up.
95 lines
3.2 KiB
C
95 lines
3.2 KiB
C
/* memcopy.h -- definitions for memory copy functions. Pentium version.
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Copyright (C) 1994, 1995 Free Software Foundation, Inc.
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Contributed by Torbjorn Granlund (tege@sics.se).
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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/* Get the i386 definitions. We will override some of them below. */
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#include_next <memcopy.h>
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/* Written like this, the Pentium pipeline can execute the loop at a
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sustained rate of 2 instructions/clock, or asymptotically 480
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Mbytes/second at 60Mhz. */
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#undef WORD_COPY_FWD
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#define WORD_COPY_FWD(dst_bp, src_bp, nbytes_left, nbytes) \
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do \
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{ \
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asm volatile ("subl $32,%2\n" \
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"js 2f\n" \
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"1:\n" \
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"movl 0(%1),%%eax\n" \
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"movl 4(%1),%%edx\n" \
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"movl %%eax,0(%0)\n" \
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"movl %%edx,4(%0)\n" \
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"movl 8(%1),%%eax\n" \
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"movl 12(%1),%%edx\n" \
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"movl %%eax,8(%0)\n" \
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"movl %%edx,12(%0)\n" \
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"movl 16(%1),%%eax\n" \
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"movl 20(%1),%%edx\n" \
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"movl %%eax,16(%0)\n" \
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"movl %%edx,20(%0)\n" \
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"movl 24(%1),%%eax\n" \
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"movl 28(%1),%%edx\n" \
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"movl %%eax,24(%0)\n" \
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"movl %%edx,28(%0)\n" \
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"addl $32,%1\n" \
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"addl $32,%0\n" \
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"subl $32,%2\n" \
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"jns 1b\n" \
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"2: addl $32,%2" : \
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"=r" (dst_bp), "=r" (src_bp), "=r" (nbytes_left) : \
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"0" (dst_bp), "1" (src_bp), "2" (nbytes) : \
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"ax", "dx"); \
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} while (0)
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#undef WORD_COPY_BWD
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#define WORD_COPY_BWD(dst_ep, src_ep, nbytes_left, nbytes) \
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do \
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{ \
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asm volatile ("subl $32,%2\n" \
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"js 2f\n" \
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"1:\n" \
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"movl -4(%1),%%eax\n" \
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"movl -8(%1),%%edx\n" \
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"movl %%eax,-4(%0)\n" \
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"movl %%edx,-8(%0)\n" \
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"movl -12(%1),%%eax\n" \
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"movl -16(%1),%%edx\n" \
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"movl %%eax,-12(%0)\n" \
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"movl %%edx,-16(%0)\n" \
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"movl -20(%1),%%eax\n" \
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"movl -24(%1),%%edx\n" \
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"movl %%eax,-20(%0)\n" \
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"movl %%edx,-24(%0)\n" \
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"movl -28(%1),%%eax\n" \
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"movl -32(%1),%%edx\n" \
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"movl %%eax,-28(%0)\n" \
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"movl %%edx,-32(%0)\n" \
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"subl $32,%1\n" \
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"subl $32,%0\n" \
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"subl $32,%2\n" \
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"jns 1b\n" \
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"2: addl $32,%2" : \
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"=r" (dst_ep), "=r" (src_ep), "=r" (nbytes_left) : \
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"0" (dst_ep), "1" (src_ep), "2" (nbytes) : \
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"ax", "dx"); \
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} while (0)
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