Reapply fix for EXPORT_C problem in backend.dll, which got lost in the merge - bug 2971
/*
* 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"
/* This is a suprisingly fast implementation of clipping
* in straight C. It would be difficult to do it faster in asm
* without specialized opcodes. */
static void
clip_s16_fast (int16_t *dest, int dstr, int16_t *src, int sstr, int n,
int16_t *low, int16_t *hi)
{
int i;
int32_t x;
for(i=0;i<n;i++){
x = OIL_GET(src,i*sstr, int16_t);
x = x - (((x-*low)>>31)&(x-*low)) + (((*hi-x)>>31)&(*hi-x));
OIL_GET(dest,i*dstr, int16_t) = x;
}
}
OIL_DEFINE_IMPL (clip_s16_fast, clip_s16);
static void
clip_s16_fast2 (int16_t *dest, int dstr, int16_t *src, int sstr, int n,
int16_t *low, int16_t *hi)
{
int32_t x1, x2;
if (n&1) {
x1 = *src;
OIL_INCREMENT(src,sstr);
x1 -= (((x1-*low)>>31)&(x1-*low));
*dest = x1 + (((*hi-x1)>>31)&(*hi-x1));
OIL_INCREMENT(dest,dstr);
n--;
}
while(n>0){
x1 = *src;
OIL_INCREMENT(src,sstr);
x2 = *src;
OIL_INCREMENT(src,sstr);
x1 -= (((x1-*low)>>31)&(x1-*low));
x2 -= (((x2-*low)>>31)&(x2-*low));
*dest = x1 + (((*hi-x1)>>31)&(*hi-x1));
OIL_INCREMENT(dest,dstr);
*dest = x2 + (((*hi-x2)>>31)&(*hi-x2));
OIL_INCREMENT(dest,dstr);
n-=2;
}
}
OIL_DEFINE_IMPL (clip_s16_fast2, clip_s16);
#if 0
/* broken */
/* This trick clips
* the range min^(1<<31) to max^(1<<31) incorrectly with int32_t.
* Thus the use of int64_t. */
static void
clip_s32_fast (int32_t *dest, int dstr, int32_t *src, int sstr, int n,
int32_t *low, int32_t *hi)
{
int i;
int64_t x;
for(i=0;i<n;i++){
x = OIL_GET(src,i*sstr,int32_t);
x = x - (((x-*low)>>63)&(x-*low)) + (((*hi-x)>>63)&(*hi-x));
OIL_GET(dest,i*dstr,int32_t) = x;
}
}
OIL_DEFINE_IMPL (clip_s32_fast, clip_s32);
#endif
#ifdef __SYMBIAN32__
OilFunctionImpl* __oil_function_impl_clip_s16_fast() {
return &_oil_function_impl_clip_s16_fast;
}
#endif
#ifdef __SYMBIAN32__
OilFunctionImpl* __oil_function_impl_clip_s16_fast2() {
return &_oil_function_impl_clip_s16_fast2;
}
#endif
#if 0
#ifdef __SYMBIAN32__
OilFunctionImpl* __oil_function_impl_clip_s32_fast() {
return &_oil_function_impl_clip_s32_fast;
}
#endif
#endif