/*

 * 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