/*
 * 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>

OIL_DECLARE_CLASS (sad8x8_u8_avg);

static void
sad8x8_u8_avg_mmx (uint32_t *dest, uint8_t *src1, int ss1, uint8_t *src2, uint8_t *src3, int ss2)
{
#if !defined(__WINSCW__) && !defined(__WINS__)       
uint32_t diff;

  __asm__ __volatile__ (
    "  pcmpeqd     %%mm5, %%mm5     \n\t"	/* fefefefefefefefe in mm5 */
    "  paddb       %%mm5, %%mm5     \n\t"
   
    "  pxor        %%mm6, %%mm6     \n\t"	/* zero out mm6 for unpack */
    "  pxor        %%mm7, %%mm7     \n\t" 	/* mm7 contains the result */
    "  mov         $8, %%edi        \n\t"	/* 8 rows */
    "1:                             \n\t"
    "  movq        (%1), %%mm0      \n\t"	/* take 8 bytes */

    "  movq        (%2), %%mm2      \n\t"
    "  movq        (%3), %%mm3      \n\t"	/* take average of mm2 and mm3 */
    "  movq        %%mm2, %%mm1     \n\t"
    "  pand        %%mm3, %%mm1     \n\t"
    "  pxor        %%mm2, %%mm3     \n\t"
    "  pand        %%mm5, %%mm3     \n\t"
    "  psrlq       $1, %%mm3        \n\t"
    "  paddb       %%mm3, %%mm1     \n\t"

    "  movq        %%mm0, %%mm2     \n\t"

    "  psubusb     %%mm1, %%mm0     \n\t" 	/* A - B */
    "  psubusb     %%mm2, %%mm1     \n\t"	/* B - A */
    "  por         %%mm1, %%mm0     \n\t"    	/* and or gives abs difference */
    "  movq        %%mm0, %%mm1     \n\t"

    "  punpcklbw   %%mm6, %%mm0     \n\t"	/* unpack to higher precision for accumulation */
    "  paddw       %%mm0, %%mm7     \n\t"	/* accumulate difference... */
    "  punpckhbw   %%mm6, %%mm1     \n\t"	/* unpack high four bytes to higher precision */
    "  add         %4, %1           \n\t"	/* Inc pointer into the new data */
    "  paddw       %%mm1, %%mm7     \n\t"	/* accumulate difference... */
    "  add         %5, %2           \n\t"	/* Inc pointer into ref data */
    "  add         %5, %3           \n\t"	/* Inc pointer into ref data */

    "  dec         %%edi            \n\t"
    "  jnz 1b                       \n\t"

    "  movq        %%mm7, %%mm0     \n\t"
    "  psrlq       $32, %%mm7       \n\t"
    "  paddw       %%mm0, %%mm7     \n\t"
    "  movq        %%mm7, %%mm0     \n\t"
    "  psrlq       $16, %%mm7       \n\t"
    "  paddw       %%mm0, %%mm7     \n\t"
    "  movd        %%mm7, %0        \n\t"
    "  andl        $0xffff, %0      \n\t"
    "  emms                         \n\t"

     : "=m" (diff),
       "+r" (src1), 
       "+r" (src2), 
       "+r" (src3) 
     : "m" (ss1),
       "m" (ss2)
     : "edi", "memory"
  );
  *dest = diff;
#endif  
}

OIL_DEFINE_IMPL_FULL (sad8x8_u8_avg_mmx, sad8x8_u8_avg, OIL_IMPL_FLAG_MMX);

static void
sad8x8_u8_avg_mmxext (uint32_t *dest, uint8_t *src1, int ss1, uint8_t *src2, uint8_t *src3, int ss2)
{
#if !defined(__WINSCW__) && !defined(__WINS__)      
  uint32_t  diff;

  __asm__ __volatile__ (
    "  pxor %%mm7, %%mm7            \n\t" 	/* mm7 contains the result */
    "  mov $0x01010101, %%eax       \n\t"
    "  movd %%eax, %%mm6            \n\t"
    "  punpcklbw %%mm6, %%mm6       \n\t"
    "  mov $8, %%eax                \n\t"
    "1:                             \n\t"
    "  movq (%1), %%mm0             \n\t"	/* take 8 bytes */
    "  movq (%2), %%mm1             \n\t"
    "  movq (%3), %%mm2             \n\t"
    "  movq %%mm1, %%mm3            \n\t"
    "  pavgb %%mm2, %%mm1           \n\t"
    "  pxor %%mm2, %%mm3            \n\t"
    "  pand %%mm6, %%mm3            \n\t"
    "  psubb %%mm3, %%mm1           \n\t"
    "  psadbw %%mm1, %%mm0          \n\t"

    "  add %4, %1                   \n\t"	/* Inc pointer into the new data */
    "  paddw %%mm0, %%mm7           \n\t"	/* accumulate difference... */
    "  add %5, %2                   \n\t"	/* Inc pointer into ref data */
    "  add %5, %3                   \n\t"	/* Inc pointer into ref data */
    "  decl %%eax                   \n\t"
    "  jnz 1b                       \n\t"

    "  movd %%mm7, %0               \n\t"
    "  emms                         \n\t"
     : "=m" (diff),
       "+r" (src1), 
       "+r" (src2), 
       "+r" (src3) 
     : "m" (ss1),
       "m" (ss2)
     : "eax", "memory"
  );
  *dest = diff;
#endif
}
OIL_DEFINE_IMPL_FULL (sad8x8_u8_avg_mmxext, sad8x8_u8_avg, OIL_IMPL_FLAG_MMX | OIL_IMPL_FLAG_MMXEXT);


#ifdef	__SYMBIAN32__
 
OilFunctionImpl* __oil_function_impl_sad8x8_u8_avg_mmx, sad8x8_u8_avg() {
		return &_oil_function_impl_sad8x8_u8_avg_mmx, sad8x8_u8_avg;
}
#endif

#ifdef	__SYMBIAN32__
 
OilFunctionImpl* __oil_function_impl_sad8x8_u8_avg_mmxext, sad8x8_u8_avg() {
		return &_oil_function_impl_sad8x8_u8_avg_mmxext, sad8x8_u8_avg;
}
#endif