genericopenlibs/liboil/src/copy/copy.c
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Fri, 16 Apr 2010 16:46:38 +0300
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/*
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 * LIBOIL - Library of Optimized Inner Loops
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 * Copyright (c) 2004 David A. Schleef <ds@schleef.org>
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 * 
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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 * POSSIBILITY OF SUCH DAMAGE.
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 */
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//Portions Copyright (c)  2008-2009 Nokia Corporation and/or its subsidiary(-ies). All rights reserved. 
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <string.h>
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#include <liboil/liboilfunction.h>
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OIL_DECLARE_CLASS (copy_u8);
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static void
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copy_u8_libc (uint8_t *dest, const uint8_t *src, int n)
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{
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  memcpy (dest, src, n);
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}
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OIL_DEFINE_IMPL (copy_u8_libc, copy_u8);
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static void
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copy_u8_ptr (uint8_t *dest, const uint8_t *src, int n)
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{
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  while(n--) {
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    *dest++ = *src++;
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  }
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}
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OIL_DEFINE_IMPL (copy_u8_ptr, copy_u8);
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#ifdef HAVE_UNALIGNED_ACCESS
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static void
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copy_u8_ints (uint8_t *dest, const uint8_t *src, int n)
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{
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  int i;
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  for(i=0;i<(n&3);i++){
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    *dest++ = *src++;
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  }
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  n >>= 2;
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  for(i=0;i<n;i++){
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    *(uint32_t *)dest = *(uint32_t *)src;
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    dest += 4;
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    src += 4;
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  }
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}
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OIL_DEFINE_IMPL (copy_u8_ints, copy_u8);
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#endif
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#ifdef HAVE_UNALIGNED_ACCESS
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/* Submitted by Adam Moss */
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static void
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copy_u8_llints (uint8_t *dest, const uint8_t *src, int n)
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{
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  int i;
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  for(i=0;i<(n&7);i++){
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    *dest++ = *src++;
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  }
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  n >>= 3;
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  for(i=0;i<n;i++){
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    *(uint64_t *)dest = *(uint64_t *)src;
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    dest += 8;
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    src += 8;
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  }
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}
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OIL_DEFINE_IMPL (copy_u8_llints, copy_u8);
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#endif
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#ifdef HAVE_UNALIGNED_ACCESS
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/* Submitted by Adam Moss */
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static void
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copy_u8_llints_duff (uint8_t *dest, const uint8_t *src, int n)
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{
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  switch(n&7) {
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  case 7: *dest++ = *src++;
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  case 6: *dest++ = *src++;
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  case 5: *dest++ = *src++;
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  case 4: *dest++ = *src++;
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  case 3: *dest++ = *src++;
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  case 2: *dest++ = *src++;
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  case 1: *dest++ = *src++;
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  default: ;
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  }
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  n >>= 3;
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  while (n) {
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    switch (n & 15) {
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    default:
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    case 0: *(uint64_t *)dest = *(uint64_t *)src; dest += 8; src += 8;
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    case 15: *(uint64_t *)dest = *(uint64_t *)src; dest += 8; src += 8;
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    case 14: *(uint64_t *)dest = *(uint64_t *)src; dest += 8; src += 8;
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    case 13: *(uint64_t *)dest = *(uint64_t *)src; dest += 8; src += 8;
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    case 12: *(uint64_t *)dest = *(uint64_t *)src; dest += 8; src += 8;
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    case 11: *(uint64_t *)dest = *(uint64_t *)src; dest += 8; src += 8;
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    case 10: *(uint64_t *)dest = *(uint64_t *)src; dest += 8; src += 8;
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    case 9: *(uint64_t *)dest = *(uint64_t *)src; dest += 8; src += 8;
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    case 8: *(uint64_t *)dest = *(uint64_t *)src; dest += 8; src += 8;
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    case 7: *(uint64_t *)dest = *(uint64_t *)src; dest += 8; src += 8;
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    case 6: *(uint64_t *)dest = *(uint64_t *)src; dest += 8; src += 8;
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    case 5: *(uint64_t *)dest = *(uint64_t *)src; dest += 8; src += 8;
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    case 4: *(uint64_t *)dest = *(uint64_t *)src; dest += 8; src += 8;
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    case 3: *(uint64_t *)dest = *(uint64_t *)src; dest += 8; src += 8;
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    case 2: *(uint64_t *)dest = *(uint64_t *)src; dest += 8; src += 8;
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    case 1: *(uint64_t *)dest = *(uint64_t *)src; dest += 8; src += 8;
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    }
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    n = (n - 1) & ~(int)15;
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  }
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}
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OIL_DEFINE_IMPL (copy_u8_llints_duff, copy_u8);
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#endif
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#ifdef	__SYMBIAN32__
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OilFunctionImpl* __oil_function_impl_copy_u8_libc() {
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		return &_oil_function_impl_copy_u8_libc;
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}
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#endif
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#ifdef	__SYMBIAN32__
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OilFunctionImpl* __oil_function_impl_copy_u8_ptr() {
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		return &_oil_function_impl_copy_u8_ptr;
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}
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#endif
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#ifdef HAVE_UNALIGNED_ACCESS
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#ifdef	__SYMBIAN32__
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OilFunctionImpl* __oil_function_impl_copy_u8_ints() {
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		return &_oil_function_impl_copy_u8_ints;
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}
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#endif
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#endif
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#ifdef HAVE_UNALIGNED_ACCESS
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#ifdef	__SYMBIAN32__
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OilFunctionImpl* __oil_function_impl_copy_u8_llints() {
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		return &_oil_function_impl_copy_u8_llints;
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}
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#endif
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#endif
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#ifdef HAVE_UNALIGNED_ACCESS
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#ifdef	__SYMBIAN32__
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OilFunctionImpl* __oil_function_impl_copy_u8_llints_duff() {
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		return &_oil_function_impl_copy_u8_llints_duff;
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}
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#endif
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#endif