glibc/sysdeps/i386/i586/memcopy.h
Ulrich Drepper 3d42e04d74 Update.
1998-09-23 17:28 -0400  Zack Weinberg  <zack@rabi.phys.columbia.edu>

	* misc/sys/mman.h: New file.

	* sysdeps/generic/bits/mman.h: New file.
	* sysdeps/unix/bsd/osf/bits/mman.h: New file.
	* sysdeps/unix/bsd/sun/sunos4/bits/mman.h: New file.
	* sysdeps/unix/bsd/ultrix4/bits/mman.h: New file.
	* sysdeps/unix/sysv/irix4/bits/mman.h: New file.

	* sysdeps/generic/sys/mman.h: Removed.
	* sysdeps/unix/bsd/osf/sys/mman.h: Removed.
	* sysdeps/unix/bsd/sun/sunos4/sys/mman.h: Removed.
	* sysdeps/unix/bsd/ultrix4/sys/mman.h: Removed.
	* sysdeps/unix/sysv/irix4/sys/mman.h: Removed.
	* sysdeps/unix/sysv/linux/sys/mman.h: Removed.

	* include/sys/mman.h: Look directly for misc/sys/mman.h.
	* misc/Makefile (headers): Add bits/mman.h.
	* sysdeps/unix/sysv/linux/Makefile (sysdep_headers): Remove
	bits/mman.h.

	* sysdeps/unix/sysv/linux/alpha/Dist: Don't mention bits/mman.h.
	* sysdeps/unix/sysv/linux/arm/Dist: Likewise.
	* sysdeps/unix/sysv/linux/i386/Dist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/Dist: Likewise.
	* sysdeps/unix/sysv/linux/mips/Dist: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/Dist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc32/Dist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/Dist: Likewise.

1998-09-23 16:27 -0400  Zack Weinberg  <zack@rabi.phys.columbia.edu>

	* sysdeps/mach/alpha/sysdep.h: Don't use #include_next.
	* sysdeps/mach/alpha/thread_state.h: Likewise.
	* sysdeps/mach/i386/sysdep.h: Likewise.
	* sysdeps/mach/i386/thread_state.h: Likewise.
	* sysdeps/mach/mips/sysdep.h: Likewise.
	* sysdeps/mach/mips/thread_state.h: Likewise.
	* sysdeps/posix/profil.c: Likewise.
	* sysdeps/i386/i586/memcopy.h: Likewise.
	* sysdeps/mach/pagecopy.h: Likewise.
1998-09-23 18:52:55 +00:00

97 lines
3.5 KiB
C

/* memcopy.h -- definitions for memory copy functions. Pentium version.
Copyright (C) 1994, 1995, 1996, 1997 Free Software Foundation, Inc.
Contributed by Torbjorn Granlund (tege@sics.se).
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 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. */
/* Get the i386 definitions. We will override some of them below. */
#include <sysdeps/i386/memcopy.h>
/* Written like this, the Pentium pipeline can execute the loop at a
sustained rate of 2 instructions/clock, or asymptotically 480
Mbytes/second at 60Mhz. */
#undef WORD_COPY_FWD
#define WORD_COPY_FWD(dst_bp, src_bp, nbytes_left, nbytes) \
do \
{ \
asm volatile ("subl $32,%2\n" \
"js 2f\n" \
"movl 0(%0),%%edx\n" /* alloc dest line */ \
"1:\n" \
"movl 28(%0),%%eax\n" /* alloc dest line */ \
"subl $32,%2\n" /* decr loop count */ \
"movl 0(%1),%%eax\n" /* U pipe */ \
"movl 4(%1),%%edx\n" /* V pipe */ \
"movl %%eax,0(%0)\n" /* U pipe */ \
"movl %%edx,4(%0)\n" /* V pipe */ \
"movl 8(%1),%%eax\n" \
"movl 12(%1),%%edx\n" \
"movl %%eax,8(%0)\n" \
"movl %%edx,12(%0)\n" \
"movl 16(%1),%%eax\n" \
"movl 20(%1),%%edx\n" \
"movl %%eax,16(%0)\n" \
"movl %%edx,20(%0)\n" \
"movl 24(%1),%%eax\n" \
"movl 28(%1),%%edx\n" \
"movl %%eax,24(%0)\n" \
"movl %%edx,28(%0)\n" \
"leal 32(%1),%1\n" /* update src ptr */ \
"leal 32(%0),%0\n" /* update dst ptr */ \
"jns 1b\n" \
"2: addl $32,%2" : \
"=r" (dst_bp), "=r" (src_bp), "=r" (nbytes_left) : \
"0" (dst_bp), "1" (src_bp), "2" (nbytes) : \
"ax", "dx"); \
} while (0)
#undef WORD_COPY_BWD
#define WORD_COPY_BWD(dst_ep, src_ep, nbytes_left, nbytes) \
do \
{ \
asm volatile ("subl $32,%2\n" \
"js 2f\n" \
"movl -4(%0),%%edx\n" \
"1:\n" \
"movl -32(%0),%%eax\n" \
"subl $32,%2\n" \
"movl -4(%1),%%eax\n" \
"movl -8(%1),%%edx\n" \
"movl %%eax,-4(%0)\n" \
"movl %%edx,-8(%0)\n" \
"movl -12(%1),%%eax\n" \
"movl -16(%1),%%edx\n" \
"movl %%eax,-12(%0)\n" \
"movl %%edx,-16(%0)\n" \
"movl -20(%1),%%eax\n" \
"movl -24(%1),%%edx\n" \
"movl %%eax,-20(%0)\n" \
"movl %%edx,-24(%0)\n" \
"movl -28(%1),%%eax\n" \
"movl -32(%1),%%edx\n" \
"movl %%eax,-28(%0)\n" \
"movl %%edx,-32(%0)\n" \
"leal -32(%1),%1\n" \
"leal -32(%0),%0\n" \
"jns 1b\n" \
"2: addl $32,%2" : \
"=r" (dst_ep), "=r" (src_ep), "=r" (nbytes_left) : \
"0" (dst_ep), "1" (src_ep), "2" (nbytes) : \
"ax", "dx"); \
} while (0)