/*

 * LIBOIL - Library of Optimized Inner Loops

 * Copyright (c) 2003,2004 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/liboilfunction.h>

#include "liboil/simdpack/simdpack.h"

#define ABS(x) ((x)>0 ? (x) : -(x))

static void

abs_u16_s16_unroll2 (uint16_t * dest, int dstr, int16_t * src, int sstr, int n)

{

  while (n & 1) {

    *dest = ABS (*src);

    OIL_INCREMENT (dest, dstr);

    OIL_INCREMENT (src, sstr);

    n--;

  }

  while (n > 0) {

    *dest = ABS (*src);

    OIL_INCREMENT (dest, dstr);

    OIL_INCREMENT (src, sstr);

    *dest = ABS (*src);

    OIL_INCREMENT (dest, dstr);

    OIL_INCREMENT (src, sstr);

    n -= 2;

  }

}

OIL_DEFINE_IMPL (abs_u16_s16_unroll2, abs_u16_s16);

static void

abs_u16_s16_unroll4 (uint16_t * dest, int dstr, int16_t * src, int sstr, int n)

{

  while (n & 3) {

    *dest = ABS (*src);

    OIL_INCREMENT (dest, dstr);

    OIL_INCREMENT (src, sstr);

    n--;

  }

  while (n > 0) {

    *dest = ABS (*src);

    OIL_INCREMENT (dest, dstr);

    OIL_INCREMENT (src, sstr);

    *dest = ABS (*src);

    OIL_INCREMENT (dest, dstr);

    OIL_INCREMENT (src, sstr);

    *dest = ABS (*src);

    OIL_INCREMENT (dest, dstr);

    OIL_INCREMENT (src, sstr);

    *dest = ABS (*src);

    OIL_INCREMENT (dest, dstr);

    OIL_INCREMENT (src, sstr);

    n -= 4;

  }

}

OIL_DEFINE_IMPL (abs_u16_s16_unroll4, abs_u16_s16);

static void

abs_u16_s16_fast (uint16_t * dest, int dstr, int16_t * src, int sstr, int n)

{

  int i;

  int16_t x, y;

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

    x = *src;

    y = ((x >> 15) & x);

    *dest = x - y - y;

    OIL_INCREMENT (dest, dstr);

    OIL_INCREMENT (src, sstr);

  }

}

OIL_DEFINE_IMPL (abs_u16_s16_fast, abs_u16_s16);

/* Similar algorithm as clipping, but for absolute value.  Note the stunt

 * pulled to get around 2*y rolling over.  */

static void

abs_u32_s32_fast (uint32_t * dest, int dstr, int32_t * src, int sstr, int n)

{

  int i;

  int32_t x, y;

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

    x = OIL_GET(src, i * sstr, int32_t);

    y = ((x >> 31) & x);

    OIL_GET(dest, i * dstr, uint32_t) = x - y - y;

  }

}

OIL_DEFINE_IMPL (abs_u32_s32_fast, abs_u32_s32);

#ifdef	__SYMBIAN32__

OilFunctionImpl* __oil_function_impl_abs_u16_s16_unroll2() {

		return &_oil_function_impl_abs_u16_s16_unroll2;

}

#endif

#ifdef	__SYMBIAN32__

OilFunctionImpl* __oil_function_impl_abs_u16_s16_unroll4() {

		return &_oil_function_impl_abs_u16_s16_unroll4;

}

#endif

#ifdef	__SYMBIAN32__

OilFunctionImpl* __oil_function_impl_abs_u16_s16_fast() {

		return &_oil_function_impl_abs_u16_s16_fast;

}

#endif

#ifdef	__SYMBIAN32__

OilFunctionImpl* __oil_function_impl_abs_u32_s32_fast() {

		return &_oil_function_impl_abs_u32_s32_fast;

}

#endif