2012-12-11 Steve Ellcey <sellcey@mips.com>
* libc/machine/mips/memcpy.c: Remove. * libc/machine/mips/memcpy.S: New. * libc/machine/mips/Makefile.am (lib_a_CCASFLAGS): Add -D_COMPILING_NEWLIB. (lib_a_CFLAGS): Ditto.
This commit is contained in:
Jeff Johnston
parent
82f89336bf
commit
a5149a541a
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@ -1,3 +1,11 @@
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2012-12-11 Steve Ellcey <sellcey@mips.com>
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* libc/machine/mips/memcpy.c: Remove.
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* libc/machine/mips/memcpy.S: New.
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* libc/machine/mips/Makefile.am (lib_a_CCASFLAGS): Add
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-D_COMPILING_NEWLIB.
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(lib_a_CFLAGS): Ditto.
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2012-12-04 Kyrylo Tkachov <kyrylo.tkachov@arm.com>
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* configure.host: Define libm_machine_dir value for arm.
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@ -8,9 +8,9 @@ AM_CCASFLAGS = $(INCLUDES)
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lib_a_SOURCES = setjmp.S strlen.c strcmp.c strncpy.c memset.c memcpy.c
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lib_a_CCASFLAGS=$(AM_CCASFLAGS)
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lib_a_CFLAGS=$(AM_CFLAGS)
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lib_a_SOURCES = setjmp.S strlen.c strcmp.c strncpy.c memset.c memcpy.S
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lib_a_CCASFLAGS=$(AM_CCASFLAGS) -D_COMPILING_NEWLIB
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lib_a_CFLAGS=$(AM_CFLAGS) -D_COMPILING_NEWLIB
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ACLOCAL_AMFLAGS = -I ../../.. -I ../../../..
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CONFIG_STATUS_DEPENDENCIES = $(newlib_basedir)/configure.host
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@ -1,9 +1,9 @@
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# Makefile.in generated by automake 1.11.1 from Makefile.am.
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# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
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# 2003, 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation,
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# Inc.
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# 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software
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# Foundation, Inc.
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# This Makefile.in is free software; the Free Software Foundation
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# gives unlimited permission to copy and/or distribute it,
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# with or without modifications, as long as this notice is preserved.
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@ -16,6 +16,23 @@
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@ -66,6 +83,11 @@ COMPILE = $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) \
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@ -175,16 +197,16 @@ AUTOMAKE_OPTIONS = cygnus
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@ -221,7 +243,7 @@ $(am__aclocal_m4_deps):
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$(RANLIB) lib.a
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@ -244,6 +266,12 @@ lib_a-setjmp.o: setjmp.S
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lib_a-setjmp.obj: setjmp.S
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lib_a-memcpy.o: memcpy.S
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$(CCAS) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CCASFLAGS) $(CCASFLAGS) -c -o lib_a-memcpy.o `test -f 'memcpy.S' || echo '$(srcdir)/'`memcpy.S
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lib_a-memcpy.obj: memcpy.S
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.c.o:
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$(COMPILE) -c $<
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@ -274,12 +302,6 @@ lib_a-memset.o: memset.c
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lib_a-memset.obj: memset.c
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lib_a-memcpy.o: memcpy.c
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$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-memcpy.o `test -f 'memcpy.c' || echo '$(srcdir)/'`memcpy.c
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lib_a-memcpy.obj: memcpy.c
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$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-memcpy.obj `if test -f 'memcpy.c'; then $(CYGPATH_W) 'memcpy.c'; else $(CYGPATH_W) '$(srcdir)/memcpy.c'; fi`
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$(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
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$(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
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|
||||
# One issue with vendor `install' (even GNU) is that you can't
|
||||
|
|
@ -874,13 +893,13 @@ fi
|
|||
INSTALL_STRIP_PROGRAM="\$(install_sh) -c -s"
|
||||
AC_SUBST([INSTALL_STRIP_PROGRAM])])
|
||||
|
||||
# Copyright (C) 2006, 2008 Free Software Foundation, Inc.
|
||||
# Copyright (C) 2006, 2008, 2010 Free Software Foundation, Inc.
|
||||
#
|
||||
# This file is free software; the Free Software Foundation
|
||||
# gives unlimited permission to copy and/or distribute it,
|
||||
# with or without modifications, as long as this notice is preserved.
|
||||
|
||||
# serial 2
|
||||
# serial 3
|
||||
|
||||
# _AM_SUBST_NOTMAKE(VARIABLE)
|
||||
# ---------------------------
|
||||
|
|
@ -889,13 +908,13 @@ AC_SUBST([INSTALL_STRIP_PROGRAM])])
|
|||
AC_DEFUN([_AM_SUBST_NOTMAKE])
|
||||
|
||||
# AM_SUBST_NOTMAKE(VARIABLE)
|
||||
# ---------------------------
|
||||
# --------------------------
|
||||
# Public sister of _AM_SUBST_NOTMAKE.
|
||||
AC_DEFUN([AM_SUBST_NOTMAKE], [_AM_SUBST_NOTMAKE($@)])
|
||||
|
||||
# Check how to create a tarball. -*- Autoconf -*-
|
||||
|
||||
# Copyright (C) 2004, 2005 Free Software Foundation, Inc.
|
||||
# Copyright (C) 2004, 2005, 2012 Free Software Foundation, Inc.
|
||||
#
|
||||
# This file is free software; the Free Software Foundation
|
||||
# gives unlimited permission to copy and/or distribute it,
|
||||
|
|
@ -917,10 +936,11 @@ AC_DEFUN([AM_SUBST_NOTMAKE], [_AM_SUBST_NOTMAKE($@)])
|
|||
# a tarball read from stdin.
|
||||
# $(am__untar) < result.tar
|
||||
AC_DEFUN([_AM_PROG_TAR],
|
||||
[# Always define AMTAR for backward compatibility.
|
||||
AM_MISSING_PROG([AMTAR], [tar])
|
||||
[# Always define AMTAR for backward compatibility. Yes, it's still used
|
||||
# in the wild :-( We should find a proper way to deprecate it ...
|
||||
AC_SUBST([AMTAR], ['$${TAR-tar}'])
|
||||
m4_if([$1], [v7],
|
||||
[am__tar='${AMTAR} chof - "$$tardir"'; am__untar='${AMTAR} xf -'],
|
||||
[am__tar='$${TAR-tar} chof - "$$tardir"' am__untar='$${TAR-tar} xf -'],
|
||||
[m4_case([$1], [ustar],, [pax],,
|
||||
[m4_fatal([Unknown tar format])])
|
||||
AC_MSG_CHECKING([how to create a $1 tar archive])
|
||||
|
|
|
|||
|
|
@ -0,0 +1,689 @@
|
|||
/*
|
||||
* Copyright (c) 2012
|
||||
* MIPS Technologies, Inc., California.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
* 3. Neither the name of the MIPS Technologies, Inc., nor the names of its
|
||||
* contributors may be used to endorse or promote products derived from
|
||||
* this software without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE MIPS TECHNOLOGIES, INC. ``AS IS'' AND
|
||||
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE MIPS TECHNOLOGIES, INC. BE LIABLE
|
||||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
#ifdef ANDROID_CHANGES
|
||||
#include "machine/asm.h"
|
||||
#include "machine/regdef.h"
|
||||
#define USE_MEMMOVE_FOR_OVERLAP
|
||||
#define PREFETCH_LOAD_HINT PREFETCH_HINT_LOAD_STREAMED
|
||||
#define PREFETCH_STORE_HINT PREFETCH_HINT_PREPAREFORSTORE
|
||||
#elif _LIBC
|
||||
#include <sysdep.h>
|
||||
#include <regdef.h>
|
||||
#include <sys/asm.h>
|
||||
#define PREFETCH_LOAD_HINT PREFETCH_HINT_LOAD_STREAMED
|
||||
#define PREFETCH_STORE_HINT PREFETCH_HINT_PREPAREFORSTORE
|
||||
#elif _COMPILING_NEWLIB
|
||||
#include "machine/asm.h"
|
||||
#include "machine/regdef.h"
|
||||
#define PREFETCH_LOAD_HINT PREFETCH_HINT_LOAD_STREAMED
|
||||
#define PREFETCH_STORE_HINT PREFETCH_HINT_PREPAREFORSTORE
|
||||
#else
|
||||
#include <regdef.h>
|
||||
#include <sys/asm.h>
|
||||
#endif
|
||||
|
||||
#if (_MIPS_ISA == _MIPS_ISA_MIPS4) || (_MIPS_ISA == _MIPS_ISA_MIPS5) || \
|
||||
(_MIPS_ISA == _MIPS_ISA_MIPS32) || (_MIPS_ISA == _MIPS_ISA_MIPS64)
|
||||
#ifndef DISABLE_PREFETCH
|
||||
#define USE_PREFETCH
|
||||
#endif
|
||||
#endif
|
||||
|
||||
#if (_MIPS_SIM == _ABI64) || (_MIPS_SIM == _ABIN32)
|
||||
#ifndef DISABLE_DOUBLE
|
||||
#define USE_DOUBLE
|
||||
#endif
|
||||
#endif
|
||||
|
||||
|
||||
|
||||
/* Some asm.h files do not have the L macro definition. */
|
||||
#ifndef L
|
||||
#if _MIPS_SIM == _ABIO32
|
||||
# define L(label) $L ## label
|
||||
#else
|
||||
# define L(label) .L ## label
|
||||
#endif
|
||||
#endif
|
||||
|
||||
/* Some asm.h files do not have the PTR_ADDIU macro definition. */
|
||||
#ifndef PTR_ADDIU
|
||||
#ifdef USE_DOUBLE
|
||||
#define PTR_ADDIU daddiu
|
||||
#else
|
||||
#define PTR_ADDIU addiu
|
||||
#endif
|
||||
#endif
|
||||
|
||||
/* Some asm.h files do not have the PTR_SRA macro definition. */
|
||||
#ifndef PTR_SRA
|
||||
#ifdef USE_DOUBLE
|
||||
#define PTR_SRA dsra
|
||||
#else
|
||||
#define PTR_SRA sra
|
||||
#endif
|
||||
#endif
|
||||
|
||||
|
||||
/*
|
||||
* Using PREFETCH_HINT_LOAD_STREAMED instead of PREFETCH_LOAD on load
|
||||
* prefetches appears to offer a slight preformance advantage.
|
||||
*
|
||||
* Using PREFETCH_HINT_PREPAREFORSTORE instead of PREFETCH_STORE
|
||||
* or PREFETCH_STORE_STREAMED offers a large performance advantage
|
||||
* but PREPAREFORSTORE has some special restrictions to consider.
|
||||
*
|
||||
* Prefetch with the 'prepare for store' hint does not copy a memory
|
||||
* location into the cache, it just allocates a cache line and zeros
|
||||
* it out. This means that if you do not write to the entire cache
|
||||
* line before writing it out to memory some data will get zero'ed out
|
||||
* when the cache line is written back to memory and data will be lost.
|
||||
*
|
||||
* Also if you are using this memcpy to copy overlapping buffers it may
|
||||
* not behave correctly when using the 'prepare for store' hint. If you
|
||||
* use the 'prepare for store' prefetch on a memory area that is in the
|
||||
* memcpy source (as well as the memcpy destination), then you will get
|
||||
* some data zero'ed out before you have a chance to read it and data will
|
||||
* be lost.
|
||||
*
|
||||
* If you are going to use this memcpy routine with the 'prepare for store'
|
||||
* prefetch you may want to set USE_MEMMOVE_FOR_OVERLAP in order to avoid
|
||||
* the problem of running memcpy on overlapping buffers.
|
||||
*
|
||||
* There are ifdef'ed sections of this memcpy to make sure that it does not
|
||||
* do prefetches on cache lines that are not going to be completely written.
|
||||
* This code is only needed and only used when PREFETCH_STORE_HINT is set to
|
||||
* PREFETCH_HINT_PREPAREFORSTORE. This code assumes that cache lines are
|
||||
* 32 bytes and if the cache line is larger it will not work correctly.
|
||||
*/
|
||||
|
||||
#ifdef USE_PREFETCH
|
||||
# define PREFETCH_HINT_LOAD 0
|
||||
# define PREFETCH_HINT_STORE 1
|
||||
# define PREFETCH_HINT_LOAD_STREAMED 4
|
||||
# define PREFETCH_HINT_STORE_STREAMED 5
|
||||
# define PREFETCH_HINT_LOAD_RETAINED 6
|
||||
# define PREFETCH_HINT_STORE_RETAINED 7
|
||||
# define PREFETCH_HINT_WRITEBACK_INVAL 25
|
||||
# define PREFETCH_HINT_PREPAREFORSTORE 30
|
||||
|
||||
/*
|
||||
* If we have not picked out what hints to use at this point use the
|
||||
* standard load and store prefetch hints.
|
||||
*/
|
||||
#ifndef PREFETCH_STORE_HINT
|
||||
# define PREFETCH_STORE_HINT PREFETCH_HINT_STORE
|
||||
#endif
|
||||
#ifndef PREFETCH_LOAD_HINT
|
||||
# define PREFETCH_LOAD_HINT PREFETCH_HINT_LOAD
|
||||
#endif
|
||||
|
||||
/*
|
||||
* We double everything when USE_DOUBLE is true so we do 2 prefetches to
|
||||
* get 64 bytes in that case. The assumption is that each individual
|
||||
* prefetch brings in 32 bytes.
|
||||
*/
|
||||
|
||||
#ifdef USE_DOUBLE
|
||||
# define PREFETCH_CHUNK 64
|
||||
# define PREFETCH_FOR_LOAD(chunk, reg) \
|
||||
pref PREFETCH_LOAD_HINT, (chunk)*64(reg); \
|
||||
pref PREFETCH_LOAD_HINT, ((chunk)*64)+32(reg)
|
||||
# define PREFETCH_FOR_STORE(chunk, reg) \
|
||||
pref PREFETCH_STORE_HINT, (chunk)*64(reg); \
|
||||
pref PREFETCH_STORE_HINT, ((chunk)*64)+32(reg)
|
||||
#else
|
||||
# define PREFETCH_CHUNK 32
|
||||
# define PREFETCH_FOR_LOAD(chunk, reg) \
|
||||
pref PREFETCH_LOAD_HINT, (chunk)*32(reg)
|
||||
# define PREFETCH_FOR_STORE(chunk, reg) \
|
||||
pref PREFETCH_STORE_HINT, (chunk)*32(reg)
|
||||
#endif
|
||||
/* MAX_PREFETCH_SIZE is the maximum size of a prefetch, it must not be less
|
||||
* then PREFETCH_CHUNK, the assumed size of each prefetch. If the real size
|
||||
* of a prefetch is greater then MAX_PREFETCH_SIZE and the PREPAREFORSTORE
|
||||
* hint is used, the code will not work corrrectly. If PREPAREFORSTORE is not
|
||||
* used then MAX_PREFETCH_SIZE does not matter. */
|
||||
#define MAX_PREFETCH_SIZE 128
|
||||
/* PREFETCH_LIMIT is set based on the fact that we neve use an offset greater
|
||||
* then 5 on a STORE prefetch and that a single prefetch can never be larger
|
||||
* then MAX_PREFETCH_SIZE. We add the extra 32 when USE_DOUBLE is set because
|
||||
* we actually do two prefetches in that case, one 32 bytes after the other. */
|
||||
#ifdef USE_DOUBLE
|
||||
# define PREFETCH_LIMIT (5 * PREFETCH_CHUNK) + 32 + MAX_PREFETCH_SIZE
|
||||
#else
|
||||
# define PREFETCH_LIMIT (5 * PREFETCH_CHUNK) + MAX_PREFETCH_SIZE
|
||||
#endif
|
||||
#if (PREFETCH_STORE_HINT == PREFETCH_HINT_PREPAREFORSTORE) \
|
||||
&& ((PREFETCH_CHUNK * 4) < MAX_PREFETCH_SIZE)
|
||||
/* We cannot handle this because the initial prefetches may fetch bytes that
|
||||
* are before the buffer being copied. We start copies with an offset
|
||||
* of 4 so avoid this situation when using PREPAREFORSTORE. */
|
||||
#error "PREFETCH_CHUNK is too large and/or MAX_PREFETCH_SIZE is too small."
|
||||
#endif
|
||||
#else /* USE_PREFETCH not defined */
|
||||
# define PREFETCH_FOR_LOAD(offset, reg)
|
||||
# define PREFETCH_FOR_STORE(offset, reg)
|
||||
#endif
|
||||
|
||||
/* Allow the routine to be named something else if desired. */
|
||||
#ifndef MEMCPY_NAME
|
||||
#define MEMCPY_NAME memcpy
|
||||
#endif
|
||||
|
||||
/* We use these 32/64 bit registers as temporaries to do the copying. */
|
||||
#define REG0 t0
|
||||
#define REG1 t1
|
||||
#define REG2 t2
|
||||
#define REG3 t3
|
||||
#if _MIPS_SIM == _ABIO32
|
||||
# define REG4 t4
|
||||
# define REG5 t5
|
||||
# define REG6 t6
|
||||
# define REG7 t7
|
||||
#else
|
||||
# define REG4 ta0
|
||||
# define REG5 ta1
|
||||
# define REG6 ta2
|
||||
# define REG7 ta3
|
||||
#endif
|
||||
|
||||
/* We load/store 64 bits at a time when USE_DOUBLE is true.
|
||||
* The C_ prefix stands for CHUNK and is used to avoid macro name
|
||||
* conflicts with system header files. */
|
||||
|
||||
#ifdef USE_DOUBLE
|
||||
# define C_ST sd
|
||||
# define C_LD ld
|
||||
#if __MIPSEB
|
||||
# define C_LDHI ldl /* high part is left in big-endian */
|
||||
# define C_STHI sdl /* high part is left in big-endian */
|
||||
# define C_LDLO ldr /* low part is right in big-endian */
|
||||
# define C_STLO sdr /* low part is right in big-endian */
|
||||
#else
|
||||
# define C_LDHI ldr /* high part is right in little-endian */
|
||||
# define C_STHI sdr /* high part is right in little-endian */
|
||||
# define C_LDLO ldl /* low part is left in little-endian */
|
||||
# define C_STLO sdl /* low part is left in little-endian */
|
||||
#endif
|
||||
#else
|
||||
# define C_ST sw
|
||||
# define C_LD lw
|
||||
#if __MIPSEB
|
||||
# define C_LDHI lwl /* high part is left in big-endian */
|
||||
# define C_STHI swl /* high part is left in big-endian */
|
||||
# define C_LDLO lwr /* low part is right in big-endian */
|
||||
# define C_STLO swr /* low part is right in big-endian */
|
||||
#else
|
||||
# define C_LDHI lwr /* high part is right in little-endian */
|
||||
# define C_STHI swr /* high part is right in little-endian */
|
||||
# define C_LDLO lwl /* low part is left in little-endian */
|
||||
# define C_STLO swl /* low part is left in little-endian */
|
||||
#endif
|
||||
#endif
|
||||
|
||||
/* Bookkeeping values for 32 vs. 64 bit mode. */
|
||||
#ifdef USE_DOUBLE
|
||||
# define NSIZE 8
|
||||
# define NSIZEMASK 0x3f
|
||||
# define NSIZEDMASK 0x7f
|
||||
#else
|
||||
# define NSIZE 4
|
||||
# define NSIZEMASK 0x1f
|
||||
# define NSIZEDMASK 0x3f
|
||||
#endif
|
||||
#define UNIT(unit) ((unit)*NSIZE)
|
||||
#define UNITM1(unit) (((unit)*NSIZE)-1)
|
||||
|
||||
#ifdef ANDROID_CHANGES
|
||||
LEAF(MEMCPY_NAME, 0)
|
||||
#else
|
||||
LEAF(MEMCPY_NAME)
|
||||
#endif
|
||||
.set nomips16
|
||||
.set noreorder
|
||||
/*
|
||||
* Below we handle the case where memcpy is called with overlapping src and dst.
|
||||
* Although memcpy is not required to handle this case, some parts of Android
|
||||
* like Skia rely on such usage. We call memmove to handle such cases.
|
||||
*/
|
||||
#ifdef USE_MEMMOVE_FOR_OVERLAP
|
||||
PTR_SUBU t0,a0,a1
|
||||
PTR_SRA t2,t0,31
|
||||
xor t1,t0,t2
|
||||
PTR_SUBU t0,t1,t2
|
||||
sltu t2,t0,a2
|
||||
beq t2,zero,L(memcpy)
|
||||
la t9,memmove
|
||||
jr t9
|
||||
nop
|
||||
L(memcpy):
|
||||
#endif
|
||||
/*
|
||||
* If the size is less then 2*NSIZE (8 or 16), go to L(lastb). Regardless of
|
||||
* size, copy dst pointer to v0 for the return value.
|
||||
*/
|
||||
slti t2,a2,(2 * NSIZE)
|
||||
bne t2,zero,L(lastb)
|
||||
#if defined(RETURN_FIRST_PREFETCH) || defined(RETURN_LAST_PREFETCH)
|
||||
move v0,zero
|
||||
#else
|
||||
move v0,a0
|
||||
#endif
|
||||
/*
|
||||
* If src and dst have different alignments, go to L(unaligned), if they
|
||||
* have the same alignment (but are not actually aligned) do a partial
|
||||
* load/store to make them aligned. If they are both already aligned
|
||||
* we can start copying at L(aligned).
|
||||
*/
|
||||
xor t8,a1,a0
|
||||
andi t8,t8,(NSIZE-1) /* t8 is a0/a1 word-displacement */
|
||||
bne t8,zero,L(unaligned)
|
||||
PTR_SUBU a3, zero, a0
|
||||
|
||||
andi a3,a3,(NSIZE-1) /* copy a3 bytes to align a0/a1 */
|
||||
beq a3,zero,L(aligned) /* if a3=0, it is already aligned */
|
||||
PTR_SUBU a2,a2,a3 /* a2 is the remining bytes count */
|
||||
|
||||
C_LDHI t8,0(a1)
|
||||
PTR_ADDU a1,a1,a3
|
||||
C_STHI t8,0(a0)
|
||||
PTR_ADDU a0,a0,a3
|
||||
|
||||
/*
|
||||
* Now dst/src are both aligned to (word or double word) aligned addresses
|
||||
* Set a2 to count how many bytes we have to copy after all the 64/128 byte
|
||||
* chunks are copied and a3 to the dst pointer after all the 64/128 byte
|
||||
* chunks have been copied. We will loop, incrementing a0 and a1 until a0
|
||||
* equals a3.
|
||||
*/
|
||||
|
||||
L(aligned):
|
||||
andi t8,a2,NSIZEDMASK /* any whole 64-byte/128-byte chunks? */
|
||||
beq a2,t8,L(chkw) /* if a2==t8, no 64-byte/128-byte chunks */
|
||||
PTR_SUBU a3,a2,t8 /* subtract from a2 the reminder */
|
||||
PTR_ADDU a3,a0,a3 /* Now a3 is the final dst after loop */
|
||||
|
||||
/* When in the loop we may prefetch with the 'prepare to store' hint,
|
||||
* in this case the a0+x should not be past the "t0-32" address. This
|
||||
* means: for x=128 the last "safe" a0 address is "t0-160". Alternatively,
|
||||
* for x=64 the last "safe" a0 address is "t0-96" In the current version we
|
||||
* will use "prefetch hint,128(a0)", so "t0-160" is the limit.
|
||||
*/
|
||||
#if defined(USE_PREFETCH) && (PREFETCH_STORE_HINT == PREFETCH_HINT_PREPAREFORSTORE)
|
||||
PTR_ADDU t0,a0,a2 /* t0 is the "past the end" address */
|
||||
PTR_SUBU t9,t0,PREFETCH_LIMIT /* t9 is the "last safe pref" address */
|
||||
#endif
|
||||
PREFETCH_FOR_LOAD (0, a1)
|
||||
PREFETCH_FOR_LOAD (1, a1)
|
||||
PREFETCH_FOR_LOAD (2, a1)
|
||||
PREFETCH_FOR_LOAD (3, a1)
|
||||
#if defined(USE_PREFETCH) && (PREFETCH_STORE_HINT != PREFETCH_HINT_PREPAREFORSTORE)
|
||||
PREFETCH_FOR_STORE (1, a0)
|
||||
PREFETCH_FOR_STORE (2, a0)
|
||||
PREFETCH_FOR_STORE (3, a0)
|
||||
#endif
|
||||
#if defined(RETURN_FIRST_PREFETCH) && defined(USE_PREFETCH)
|
||||
#if PREFETCH_STORE_HINT == PREFETCH_HINT_PREPAREFORSTORE
|
||||
sltu v1,t9,a0
|
||||
bgtz v1,L(skip_set)
|
||||
nop
|
||||
PTR_ADDIU v0,a0,(PREFETCH_CHUNK*4)
|
||||
L(skip_set):
|
||||
#else
|
||||
PTR_ADDIU v0,a0,(PREFETCH_CHUNK*1)
|
||||
#endif
|
||||
#endif
|
||||
#if defined(RETURN_LAST_PREFETCH) && defined(USE_PREFETCH) \
|
||||
&& (PREFETCH_STORE_HINT != PREFETCH_HINT_PREPAREFORSTORE)
|
||||
PTR_ADDIU v0,a0,(PREFETCH_CHUNK*3)
|
||||
#ifdef USE_DOUBLE
|
||||
PTR_ADDIU v0,v0,32
|
||||
#endif
|
||||
#endif
|
||||
L(loop16w):
|
||||
C_LD t0,UNIT(0)(a1)
|
||||
#if defined(USE_PREFETCH) && (PREFETCH_STORE_HINT == PREFETCH_HINT_PREPAREFORSTORE)
|
||||
sltu v1,t9,a0 /* If a0 > t9 don't use next prefetch */
|
||||
bgtz v1,L(skip_pref)
|
||||
#endif
|
||||
C_LD t1,UNIT(1)(a1)
|
||||
PREFETCH_FOR_STORE (4, a0)
|
||||
PREFETCH_FOR_STORE (5, a0)
|
||||
#if defined(RETURN_LAST_PREFETCH) && defined(USE_PREFETCH)
|
||||
PTR_ADDIU v0,a0,(PREFETCH_CHUNK*5)
|
||||
#ifdef USE_DOUBLE
|
||||
PTR_ADDIU v0,v0,32
|
||||
#endif
|
||||
#endif
|
||||
L(skip_pref):
|
||||
C_LD REG2,UNIT(2)(a1)
|
||||
C_LD REG3,UNIT(3)(a1)
|
||||
C_LD REG4,UNIT(4)(a1)
|
||||
C_LD REG5,UNIT(5)(a1)
|
||||
C_LD REG6,UNIT(6)(a1)
|
||||
C_LD REG7,UNIT(7)(a1)
|
||||
PREFETCH_FOR_LOAD (4, a1)
|
||||
|
||||
C_ST t0,UNIT(0)(a0)
|
||||
C_ST t1,UNIT(1)(a0)
|
||||
C_ST REG2,UNIT(2)(a0)
|
||||
C_ST REG3,UNIT(3)(a0)
|
||||
C_ST REG4,UNIT(4)(a0)
|
||||
C_ST REG5,UNIT(5)(a0)
|
||||
C_ST REG6,UNIT(6)(a0)
|
||||
C_ST REG7,UNIT(7)(a0)
|
||||
|
||||
C_LD t0,UNIT(8)(a1)
|
||||
C_LD t1,UNIT(9)(a1)
|
||||
C_LD REG2,UNIT(10)(a1)
|
||||
C_LD REG3,UNIT(11)(a1)
|
||||
C_LD REG4,UNIT(12)(a1)
|
||||
C_LD REG5,UNIT(13)(a1)
|
||||
C_LD REG6,UNIT(14)(a1)
|
||||
C_LD REG7,UNIT(15)(a1)
|
||||
PREFETCH_FOR_LOAD (5, a1)
|
||||
C_ST t0,UNIT(8)(a0)
|
||||
C_ST t1,UNIT(9)(a0)
|
||||
C_ST REG2,UNIT(10)(a0)
|
||||
C_ST REG3,UNIT(11)(a0)
|
||||
C_ST REG4,UNIT(12)(a0)
|
||||
C_ST REG5,UNIT(13)(a0)
|
||||
C_ST REG6,UNIT(14)(a0)
|
||||
C_ST REG7,UNIT(15)(a0)
|
||||
PTR_ADDIU a0,a0,UNIT(16) /* adding 64/128 to dest */
|
||||
bne a0,a3,L(loop16w)
|
||||
PTR_ADDIU a1,a1,UNIT(16) /* adding 64/128 to src */
|
||||
move a2,t8
|
||||
|
||||
/* Here we have src and dest word-aligned but less than 64-bytes or
|
||||
* 128 bytes to go. Check for a 32(64) byte chunk and copy if if there
|
||||
* is one. Otherwise jump down to L(chk1w) to handle the tail end of
|
||||
* the copy.
|
||||
*/
|
||||
|
||||
L(chkw):
|
||||
PREFETCH_FOR_LOAD (0, a1)
|
||||
andi t8,a2,NSIZEMASK /* Is there a 32-byte/64-byte chunk. */
|
||||
/* The t8 is the reminder count past 32-bytes */
|
||||
beq a2,t8,L(chk1w) /* When a2=t8, no 32-byte chunk */
|
||||
nop
|
||||
C_LD t0,UNIT(0)(a1)
|
||||
C_LD t1,UNIT(1)(a1)
|
||||
C_LD REG2,UNIT(2)(a1)
|
||||
C_LD REG3,UNIT(3)(a1)
|
||||
C_LD REG4,UNIT(4)(a1)
|
||||
C_LD REG5,UNIT(5)(a1)
|
||||
C_LD REG6,UNIT(6)(a1)
|
||||
C_LD REG7,UNIT(7)(a1)
|
||||
PTR_ADDIU a1,a1,UNIT(8)
|
||||
C_ST t0,UNIT(0)(a0)
|
||||
C_ST t1,UNIT(1)(a0)
|
||||
C_ST REG2,UNIT(2)(a0)
|
||||
C_ST REG3,UNIT(3)(a0)
|
||||
C_ST REG4,UNIT(4)(a0)
|
||||
C_ST REG5,UNIT(5)(a0)
|
||||
C_ST REG6,UNIT(6)(a0)
|
||||
C_ST REG7,UNIT(7)(a0)
|
||||
PTR_ADDIU a0,a0,UNIT(8)
|
||||
|
||||
/*
|
||||
* Here we have less then 32(64) bytes to copy. Set up for a loop to
|
||||
* copy one word (or double word) at a time. Set a2 to count how many
|
||||
* bytes we have to copy after all the word (or double word) chunks are
|
||||
* copied and a3 to the dst pointer after all the (d)word chunks have
|
||||
* been copied. We will loop, incrementing a0 and a1 until a0 equals a3.
|
||||
*/
|
||||
L(chk1w):
|
||||
andi a2,t8,(NSIZE-1) /* a2 is the reminder past one (d)word chunks */
|
||||
beq a2,t8,L(lastb)
|
||||
PTR_SUBU a3,t8,a2 /* a3 is count of bytes in one (d)word chunks */
|
||||
PTR_ADDU a3,a0,a3 /* a3 is the dst address after loop */
|
||||
|
||||
/* copying in words (4-byte or 8-byte chunks) */
|
||||
L(wordCopy_loop):
|
||||
C_LD REG3,UNIT(0)(a1)
|
||||
PTR_ADDIU a0,a0,UNIT(1)
|
||||
PTR_ADDIU a1,a1,UNIT(1)
|
||||
bne a0,a3,L(wordCopy_loop)
|
||||
C_ST REG3,UNIT(-1)(a0)
|
||||
|
||||
/* Copy the last 8 (or 16) bytes */
|
||||
L(lastb):
|
||||
blez a2,L(leave)
|
||||
PTR_ADDU a3,a0,a2 /* a3 is the last dst address */
|
||||
L(lastbloop):
|
||||
lb v1,0(a1)
|
||||
PTR_ADDIU a0,a0,1
|
||||
PTR_ADDIU a1,a1,1
|
||||
bne a0,a3,L(lastbloop)
|
||||
sb v1,-1(a0)
|
||||
L(leave):
|
||||
j ra
|
||||
nop
|
||||
/*
|
||||
* UNALIGNED case, got here with a3 = "negu a0"
|
||||
* This code is nearly identical to the aligned code above
|
||||
* but only the destination (not the source) gets aligned
|
||||
* so we need to do partial loads of the source followed
|
||||
* by normal stores to the destination (once we have aligned
|
||||
* the destination).
|
||||
*/
|
||||
|
||||
L(unaligned):
|
||||
andi a3,a3,(NSIZE-1) /* copy a3 bytes to align a0/a1 */
|
||||
beqz a3,L(ua_chk16w) /* if a3=0, it is already aligned */
|
||||
PTR_SUBU a2,a2,a3 /* a2 is the remining bytes count */
|
||||
|
||||
C_LDHI v1,UNIT(0)(a1)
|
||||
C_LDLO v1,UNITM1(1)(a1)
|
||||
PTR_ADDU a1,a1,a3
|
||||
C_STHI v1,UNIT(0)(a0)
|
||||
PTR_ADDU a0,a0,a3
|
||||
|
||||
/*
|
||||
* Now the destination (but not the source) is aligned
|
||||
* Set a2 to count how many bytes we have to copy after all the 64/128 byte
|
||||
* chunks are copied and a3 to the dst pointer after all the 64/128 byte
|
||||
* chunks have been copied. We will loop, incrementing a0 and a1 until a0
|
||||
* equals a3.
|
||||
*/
|
||||
|
||||
L(ua_chk16w):
|
||||
andi t8,a2,NSIZEDMASK /* any whole 64-byte/128-byte chunks? */
|
||||
beq a2,t8,L(ua_chkw) /* if a2==t8, no 64-byte/128-byte chunks */
|
||||
PTR_SUBU a3,a2,t8 /* subtract from a2 the reminder */
|
||||
PTR_ADDU a3,a0,a3 /* Now a3 is the final dst after loop */
|
||||
|
||||
#if defined(USE_PREFETCH) && (PREFETCH_STORE_HINT == PREFETCH_HINT_PREPAREFORSTORE)
|
||||
PTR_ADDU t0,a0,a2 /* t0 is the "past the end" address */
|
||||
PTR_SUBU t9,t0,PREFETCH_LIMIT /* t9 is the "last safe pref" address */
|
||||
#endif
|
||||
PREFETCH_FOR_LOAD (0, a1)
|
||||
PREFETCH_FOR_LOAD (1, a1)
|
||||
PREFETCH_FOR_LOAD (2, a1)
|
||||
#if defined(USE_PREFETCH) && (PREFETCH_STORE_HINT != PREFETCH_HINT_PREPAREFORSTORE)
|
||||
PREFETCH_FOR_STORE (1, a0)
|
||||
PREFETCH_FOR_STORE (2, a0)
|
||||
PREFETCH_FOR_STORE (3, a0)
|
||||
#endif
|
||||
#if defined(RETURN_FIRST_PREFETCH) && defined(USE_PREFETCH)
|
||||
#if (PREFETCH_STORE_HINT == PREFETCH_HINT_PREPAREFORSTORE)
|
||||
sltu v1,t9,a0
|
||||
bgtz v1,L(ua_skip_set)
|
||||
nop
|
||||
PTR_ADDIU v0,a0,(PREFETCH_CHUNK*4)
|
||||
L(ua_skip_set):
|
||||
#else
|
||||
PTR_ADDIU v0,a0,(PREFETCH_CHUNK*1)
|
||||
#endif
|
||||
#endif
|
||||
L(ua_loop16w):
|
||||
PREFETCH_FOR_LOAD (3, a1)
|
||||
C_LDHI t0,UNIT(0)(a1)
|
||||
C_LDHI t1,UNIT(1)(a1)
|
||||
C_LDHI REG2,UNIT(2)(a1)
|
||||
#if defined(USE_PREFETCH) && (PREFETCH_STORE_HINT == PREFETCH_HINT_PREPAREFORSTORE)
|
||||
sltu v1,t9,a0
|
||||
bgtz v1,L(ua_skip_pref)
|
||||
#endif
|
||||
C_LDHI REG3,UNIT(3)(a1)
|
||||
PREFETCH_FOR_STORE (4, a0)
|
||||
PREFETCH_FOR_STORE (5, a0)
|
||||
L(ua_skip_pref):
|
||||
C_LDHI REG4,UNIT(4)(a1)
|
||||
C_LDHI REG5,UNIT(5)(a1)
|
||||
C_LDHI REG6,UNIT(6)(a1)
|
||||
C_LDHI REG7,UNIT(7)(a1)
|
||||
C_LDLO t0,UNITM1(1)(a1)
|
||||
C_LDLO t1,UNITM1(2)(a1)
|
||||
C_LDLO REG2,UNITM1(3)(a1)
|
||||
C_LDLO REG3,UNITM1(4)(a1)
|
||||
C_LDLO REG4,UNITM1(5)(a1)
|
||||
C_LDLO REG5,UNITM1(6)(a1)
|
||||
C_LDLO REG6,UNITM1(7)(a1)
|
||||
C_LDLO REG7,UNITM1(8)(a1)
|
||||
PREFETCH_FOR_LOAD (4, a1)
|
||||
C_ST t0,UNIT(0)(a0)
|
||||
C_ST t1,UNIT(1)(a0)
|
||||
C_ST REG2,UNIT(2)(a0)
|
||||
C_ST REG3,UNIT(3)(a0)
|
||||
C_ST REG4,UNIT(4)(a0)
|
||||
C_ST REG5,UNIT(5)(a0)
|
||||
C_ST REG6,UNIT(6)(a0)
|
||||
C_ST REG7,UNIT(7)(a0)
|
||||
C_LDHI t0,UNIT(8)(a1)
|
||||
C_LDHI t1,UNIT(9)(a1)
|
||||
C_LDHI REG2,UNIT(10)(a1)
|
||||
C_LDHI REG3,UNIT(11)(a1)
|
||||
C_LDHI REG4,UNIT(12)(a1)
|
||||
C_LDHI REG5,UNIT(13)(a1)
|
||||
C_LDHI REG6,UNIT(14)(a1)
|
||||
C_LDHI REG7,UNIT(15)(a1)
|
||||
C_LDLO t0,UNITM1(9)(a1)
|
||||
C_LDLO t1,UNITM1(10)(a1)
|
||||
C_LDLO REG2,UNITM1(11)(a1)
|
||||
C_LDLO REG3,UNITM1(12)(a1)
|
||||
C_LDLO REG4,UNITM1(13)(a1)
|
||||
C_LDLO REG5,UNITM1(14)(a1)
|
||||
C_LDLO REG6,UNITM1(15)(a1)
|
||||
C_LDLO REG7,UNITM1(16)(a1)
|
||||
PREFETCH_FOR_LOAD (5, a1)
|
||||
C_ST t0,UNIT(8)(a0)
|
||||
C_ST t1,UNIT(9)(a0)
|
||||
C_ST REG2,UNIT(10)(a0)
|
||||
C_ST REG3,UNIT(11)(a0)
|
||||
C_ST REG4,UNIT(12)(a0)
|
||||
C_ST REG5,UNIT(13)(a0)
|
||||
C_ST REG6,UNIT(14)(a0)
|
||||
C_ST REG7,UNIT(15)(a0)
|
||||
PTR_ADDIU a0,a0,UNIT(16) /* adding 64/128 to dest */
|
||||
bne a0,a3,L(ua_loop16w)
|
||||
PTR_ADDIU a1,a1,UNIT(16) /* adding 64/128 to src */
|
||||
move a2,t8
|
||||
|
||||
/* Here we have src and dest word-aligned but less than 64-bytes or
|
||||
* 128 bytes to go. Check for a 32(64) byte chunk and copy if if there
|
||||
* is one. Otherwise jump down to L(ua_chk1w) to handle the tail end of
|
||||
* the copy. */
|
||||
|
||||
L(ua_chkw):
|
||||
PREFETCH_FOR_LOAD (0, a1)
|
||||
andi t8,a2,NSIZEMASK /* Is there a 32-byte/64-byte chunk. */
|
||||
/* t8 is the reminder count past 32-bytes */
|
||||
beq a2,t8,L(ua_chk1w) /* When a2=t8, no 32-byte chunk */
|
||||
nop
|
||||
C_LDHI t0,UNIT(0)(a1)
|
||||
C_LDHI t1,UNIT(1)(a1)
|
||||
C_LDHI REG2,UNIT(2)(a1)
|
||||
C_LDHI REG3,UNIT(3)(a1)
|
||||
C_LDHI REG4,UNIT(4)(a1)
|
||||
C_LDHI REG5,UNIT(5)(a1)
|
||||
C_LDHI REG6,UNIT(6)(a1)
|
||||
C_LDHI REG7,UNIT(7)(a1)
|
||||
C_LDLO t0,UNITM1(1)(a1)
|
||||
C_LDLO t1,UNITM1(2)(a1)
|
||||
C_LDLO REG2,UNITM1(3)(a1)
|
||||
C_LDLO REG3,UNITM1(4)(a1)
|
||||
C_LDLO REG4,UNITM1(5)(a1)
|
||||
C_LDLO REG5,UNITM1(6)(a1)
|
||||
C_LDLO REG6,UNITM1(7)(a1)
|
||||
C_LDLO REG7,UNITM1(8)(a1)
|
||||
PTR_ADDIU a1,a1,UNIT(8)
|
||||
C_ST t0,UNIT(0)(a0)
|
||||
C_ST t1,UNIT(1)(a0)
|
||||
C_ST REG2,UNIT(2)(a0)
|
||||
C_ST REG3,UNIT(3)(a0)
|
||||
C_ST REG4,UNIT(4)(a0)
|
||||
C_ST REG5,UNIT(5)(a0)
|
||||
C_ST REG6,UNIT(6)(a0)
|
||||
C_ST REG7,UNIT(7)(a0)
|
||||
PTR_ADDIU a0,a0,UNIT(8)
|
||||
/*
|
||||
* Here we have less then 32(64) bytes to copy. Set up for a loop to
|
||||
* copy one word (or double word) at a time.
|
||||
*/
|
||||
L(ua_chk1w):
|
||||
andi a2,t8,(NSIZE-1) /* a2 is the reminder past one (d)word chunks */
|
||||
beq a2,t8,L(ua_smallCopy)
|
||||
PTR_SUBU a3,t8,a2 /* a3 is count of bytes in one (d)word chunks */
|
||||
PTR_ADDU a3,a0,a3 /* a3 is the dst address after loop */
|
||||
|
||||
/* copying in words (4-byte or 8-byte chunks) */
|
||||
L(ua_wordCopy_loop):
|
||||
C_LDHI v1,UNIT(0)(a1)
|
||||
C_LDLO v1,UNITM1(1)(a1)
|
||||
PTR_ADDIU a0,a0,UNIT(1)
|
||||
PTR_ADDIU a1,a1,UNIT(1)
|
||||
bne a0,a3,L(ua_wordCopy_loop)
|
||||
C_ST v1,UNIT(-1)(a0)
|
||||
|
||||
/* Copy the last 8 (or 16) bytes */
|
||||
L(ua_smallCopy):
|
||||
beqz a2,L(leave)
|
||||
PTR_ADDU a3,a0,a2 /* a3 is the last dst address */
|
||||
L(ua_smallCopy_loop):
|
||||
lb v1,0(a1)
|
||||
PTR_ADDIU a0,a0,1
|
||||
PTR_ADDIU a1,a1,1
|
||||
bne a0,a3,L(ua_smallCopy_loop)
|
||||
sb v1,-1(a0)
|
||||
|
||||
j ra
|
||||
nop
|
||||
|
||||
.set at
|
||||
.set reorder
|
||||
END(MEMCPY_NAME)
|
||||
#ifndef ANDROID_CHANGES
|
||||
#ifdef _LIBC
|
||||
libc_hidden_builtin_def (MEMCPY_NAME)
|
||||
#endif
|
||||
#endif
|
||||
|
|
@ -1,164 +0,0 @@
|
|||
/*
|
||||
FUNCTION
|
||||
<<memcpy>>---copy memory regions, optimized for the mips processors
|
||||
|
||||
ANSI_SYNOPSIS
|
||||
#include <string.h>
|
||||
void* memcpy(void *<[out]>, const void *<[in]>, size_t <[n]>);
|
||||
|
||||
TRAD_SYNOPSIS
|
||||
void *memcpy(<[out]>, <[in]>, <[n]>
|
||||
void *<[out]>;
|
||||
void *<[in]>;
|
||||
size_t <[n]>;
|
||||
|
||||
DESCRIPTION
|
||||
This function copies <[n]> bytes from the memory region
|
||||
pointed to by <[in]> to the memory region pointed to by
|
||||
<[out]>.
|
||||
|
||||
If the regions overlap, the behavior is undefined.
|
||||
|
||||
RETURNS
|
||||
<<memcpy>> returns a pointer to the first byte of the <[out]>
|
||||
region.
|
||||
|
||||
PORTABILITY
|
||||
<<memcpy>> is ANSI C.
|
||||
|
||||
<<memcpy>> requires no supporting OS subroutines.
|
||||
|
||||
QUICKREF
|
||||
memcpy ansi pure
|
||||
*/
|
||||
|
||||
#include <_ansi.h>
|
||||
#include <stddef.h>
|
||||
#include <limits.h>
|
||||
|
||||
#ifdef __mips64
|
||||
#define wordtype long long
|
||||
#else
|
||||
#define wordtype long
|
||||
#endif
|
||||
|
||||
/* Nonzero if either X or Y is not aligned on a "long" boundary. */
|
||||
#define UNALIGNED(X, Y) \
|
||||
(((long)X & (sizeof (wordtype) - 1)) | ((long)Y & (sizeof (wordtype) - 1)))
|
||||
|
||||
/* How many bytes are copied each iteration of the 4X unrolled loop. */
|
||||
#define BIGBLOCKSIZE (sizeof (wordtype) << 2)
|
||||
|
||||
/* How many bytes are copied each iteration of the word copy loop. */
|
||||
#define LITTLEBLOCKSIZE (sizeof (wordtype))
|
||||
|
||||
/* Threshhold for punting to the byte copier. */
|
||||
#define TOO_SMALL(LEN) ((LEN) < BIGBLOCKSIZE)
|
||||
|
||||
_PTR
|
||||
_DEFUN (memcpy, (dst0, src0, len0),
|
||||
_PTR dst0 _AND
|
||||
_CONST _PTR src0 _AND
|
||||
size_t len0)
|
||||
{
|
||||
#if defined(PREFER_SIZE_OVER_SPEED) || defined(__OPTIMIZE_SIZE__) || defined(__mips16)
|
||||
char *dst = (char *) dst0;
|
||||
char *src = (char *) src0;
|
||||
|
||||
_PTR save = dst0;
|
||||
|
||||
while (len0--)
|
||||
{
|
||||
*dst++ = *src++;
|
||||
}
|
||||
|
||||
return save;
|
||||
#else
|
||||
char *dst = dst0;
|
||||
_CONST char *src = src0;
|
||||
wordtype *aligned_dst;
|
||||
_CONST wordtype *aligned_src;
|
||||
int len = len0;
|
||||
size_t iter;
|
||||
|
||||
/* Handle aligned moves here. */
|
||||
if (!UNALIGNED (src, dst))
|
||||
{
|
||||
iter = len / BIGBLOCKSIZE;
|
||||
len = len % BIGBLOCKSIZE;
|
||||
aligned_dst = (wordtype *)dst;
|
||||
aligned_src = (wordtype *)src;
|
||||
|
||||
/* Copy 4X long or long long words at a time if possible. */
|
||||
while (iter > 0)
|
||||
{
|
||||
wordtype tmp0 = aligned_src[0];
|
||||
wordtype tmp1 = aligned_src[1];
|
||||
wordtype tmp2 = aligned_src[2];
|
||||
wordtype tmp3 = aligned_src[3];
|
||||
|
||||
aligned_dst[0] = tmp0;
|
||||
aligned_dst[1] = tmp1;
|
||||
aligned_dst[2] = tmp2;
|
||||
aligned_dst[3] = tmp3;
|
||||
aligned_src += 4;
|
||||
aligned_dst += 4;
|
||||
iter--;
|
||||
}
|
||||
|
||||
/* Copy one long or long long word at a time if possible. */
|
||||
iter = len / LITTLEBLOCKSIZE;
|
||||
len = len % LITTLEBLOCKSIZE;
|
||||
|
||||
while (iter > 0)
|
||||
{
|
||||
*aligned_dst++ = *aligned_src++;
|
||||
iter--;
|
||||
}
|
||||
|
||||
/* Pick up any residual with a byte copier. */
|
||||
dst = (char*)aligned_dst;
|
||||
src = (char*)aligned_src;
|
||||
|
||||
while (len > 0)
|
||||
{
|
||||
*dst++ = *src++;
|
||||
len--;
|
||||
}
|
||||
|
||||
return dst0;
|
||||
}
|
||||
|
||||
/* Handle unaligned moves here, using lwr/lwl and swr/swl where possible */
|
||||
else
|
||||
{
|
||||
#ifndef NO_UNALIGNED_LOADSTORE
|
||||
int tmp;
|
||||
int *int_src = (int *)src;
|
||||
int *int_dst = (int *)dst;
|
||||
iter = len / 4;
|
||||
len = len % 4;
|
||||
while (iter > 0)
|
||||
{
|
||||
__asm__ ("ulw %0,%1" : "=r" (tmp) : "m" (*int_src));
|
||||
iter--;
|
||||
int_src++;
|
||||
__asm__ ("usw %1,%0" : "=m" (*int_dst) : "r" (tmp));
|
||||
int_dst++;
|
||||
}
|
||||
|
||||
/* Pick up any residual with a byte copier. */
|
||||
dst = (char*)int_dst;
|
||||
src = (char*)int_src;
|
||||
#endif
|
||||
|
||||
while (len > 0)
|
||||
{
|
||||
*dst++ = *src++;
|
||||
len--;
|
||||
}
|
||||
|
||||
return dst0;
|
||||
}
|
||||
#endif /* not PREFER_SIZE_OVER_SPEED */
|
||||
}
|
||||
Loading…
Reference in New Issue