/*

  * LIBOIL - Library of Optimized Inner Loops

  * Copyright (c) 2005 David A. Schleef <ds@schleef.org>

  * All rights reserved.

  *

  * 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.

  * 

  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.

  */

 //Portions Copyright (c)  2008-2009 Nokia Corporation and/or its subsidiary(-ies). All rights reserved. 

 #ifdef HAVE_CONFIG_H

 #include "config.h"

 #endif

 #include <liboil/liboil.h>

 #include <liboil/liboilfunction.h>

 #include <liboil/liboilclasses.h>

 #ifdef HAVE_UNISTD_H

 #include <unistd.h>

 #endif

 #include <string.h>

 static void

 swab_u16_libc (uint16_t *d, const uint16_t *s, int n)

 {

   swab ((void *)s, (void *)d, n*2);

 }

 OIL_DEFINE_IMPL (swab_u16_libc, swab_u16);

 static void

 swab_u16_ptr (uint16_t *d, const uint16_t *s, int n)

 {

   int i;

   for(i=0;i<n;i++){

     *d++ = (*s<<8) | (*s>>8);

     s++;

   }

 }

 OIL_DEFINE_IMPL (swab_u16_ptr, swab_u16);

 static void

 swab_u32_ptr (uint32_t *d, const uint32_t *s, int n)

 {

   int i;

   for(i=0;i<n;i++){

     *d++ = (*s<<24) | ((*s&0x0000ff00)<<8) |

       ((*s&0x00ff0000)>>8) | (*s>>24);

     s++;

   }

 }

 OIL_DEFINE_IMPL (swab_u32_ptr, swab_u32);

 static void

 swab_u16_unroll2 (uint16_t *d, const uint16_t *s, int n)

 {

   int i;

   if (n&1) {

     *d++ = (*s<<8) | (*s>>8);

     s++;

   }

   n>>=1;

   for(i=0;i<n;i++){

     *d++ = (*s<<8) | (*s>>8);

     s++;

     *d++ = (*s<<8) | (*s>>8);

     s++;

   }

 }

 OIL_DEFINE_IMPL (swab_u16_unroll2, swab_u16);

 static void

 swab_u16_unroll4 (uint16_t *d, const uint16_t *s, int n)

 {

   int i;

   while (n&3) {

     *d++ = (*s<<8) | (*s>>8);

     s++;

     n--;

   }

   n>>=2;

   for(i=0;i<n;i++){

     *d++ = (*s<<8) | (*s>>8);

     s++;

     *d++ = (*s<<8) | (*s>>8);

     s++;

     *d++ = (*s<<8) | (*s>>8);

     s++;

     *d++ = (*s<<8) | (*s>>8);

     s++;

   }

 }

 OIL_DEFINE_IMPL (swab_u16_unroll4, swab_u16);

 static void

 swab_u32_unroll2 (uint32_t *d, const uint32_t *s, int n)

 {

   int i;

   if (n&1) {

     *d++ = (*s<<24) | ((*s&0x0000ff00)<<8) |

       ((*s&0x00ff0000)>>8) | (*s>>24);

     s++;

   }

   n>>=1;

   for(i=0;i<n;i++){

     *d++ = (*s<<24) | ((*s&0x0000ff00)<<8) |

       ((*s&0x00ff0000)>>8) | (*s>>24);

     s++;

     *d++ = (*s<<24) | ((*s&0x0000ff00)<<8) |

       ((*s&0x00ff0000)>>8) | (*s>>24);

     s++;

   }

 }

 OIL_DEFINE_IMPL (swab_u32_unroll2, swab_u32);

 static void

 swab_u16_char (uint16_t *d, const uint16_t *s, int n)

 {

   int i;

   uint8_t *bd = (uint8_t *)d;

   uint8_t *bs = (uint8_t *)s;

   int x;

   for(i=0;i<n;i++){

     x = bs[0];

     bd[0] = bs[1];

     bd[1] = x;

     bd += 2;

     bs += 2;

   }

 }

 OIL_DEFINE_IMPL (swab_u16_char, swab_u16);

 static void

 swab_u32_char (uint32_t *d, const uint32_t *s, int n)

 {

   int i;

   for(i=0;i<n;i++){

     *d++ = (*s<<24) | ((*s&0x0000ff00)<<8) |

       ((*s&0x00ff0000)>>8) | (*s>>24);

     s++;

   }

 }

 OIL_DEFINE_IMPL (swab_u32_char, swab_u32);

 #if 0

 static void

 swab_u32_asm (uint32_t *d, uint32_t *s, int n)

 {

   asm volatile ("\n"

       "1:\n"

       "  mov 0(%1), %%eax\n"

       "  bswap %%eax\n"

       "  mov %%eax, 0(%0)\n"

       "  add $4, %0\n"

       "  add $4, %1\n"

       "  decl %2\n"

       "  jne 1b\n"

       : "+r" (d), "+r" (s), "+r" (n)

       :

       : "eax");

 }

 OIL_DEFINE_IMPL (swab_u32_asm, swab_u32);

 #endif

 #ifdef	__SYMBIAN32__

 OilFunctionImpl* __oil_function_impl_swab_u16_libc() {

 		return &_oil_function_impl_swab_u16_libc;

 }

 #endif

 #ifdef	__SYMBIAN32__

 OilFunctionImpl* __oil_function_impl_swab_u16_ptr() {

 		return &_oil_function_impl_swab_u16_ptr;

 }

 #endif

 #ifdef	__SYMBIAN32__

 OilFunctionImpl* __oil_function_impl_swab_u32_ptr() {

 		return &_oil_function_impl_swab_u32_ptr;

 }

 #endif

 #ifdef	__SYMBIAN32__

 OilFunctionImpl* __oil_function_impl_swab_u16_unroll2() {

 		return &_oil_function_impl_swab_u16_unroll2;

 }

 #endif

 #ifdef	__SYMBIAN32__

 OilFunctionImpl* __oil_function_impl_swab_u16_unroll4() {

 		return &_oil_function_impl_swab_u16_unroll4;

 }

 #endif

 #ifdef	__SYMBIAN32__

 OilFunctionImpl* __oil_function_impl_swab_u32_unroll2() {

 		return &_oil_function_impl_swab_u32_unroll2;

 }

 #endif

 #ifdef	__SYMBIAN32__

 OilFunctionImpl* __oil_function_impl_swab_u16_char() {

 		return &_oil_function_impl_swab_u16_char;

 }

 #endif

 #ifdef	__SYMBIAN32__

 OilFunctionImpl* __oil_function_impl_swab_u32_char() {

 		return &_oil_function_impl_swab_u32_char;

 }

 #endif

 #if 0

 #ifdef	__SYMBIAN32__

 OilFunctionImpl* __oil_function_impl_swab_u32_asm() {

 		return &_oil_function_impl_swab_u32_asm;

 }

 #endif

 #endif