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/*
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* LIBOIL - Library of Optimized Inner Loops
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* Copyright (c) 2003,2004 David A. Schleef <ds@schleef.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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//Portions Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies). All rights reserved.
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <liboil/liboilfunction.h>
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#include "liboil/simdpack/simdpack.h"
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/* This is a suprisingly fast implementation of clipping
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* in straight C. It would be difficult to do it faster in asm
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* without specialized opcodes. */
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static void
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clip_s16_fast (int16_t *dest, int dstr, int16_t *src, int sstr, int n,
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int16_t *low, int16_t *hi)
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{
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int i;
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int32_t x;
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for(i=0;i<n;i++){
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x = OIL_GET(src,i*sstr, int16_t);
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x = x - (((x-*low)>>31)&(x-*low)) + (((*hi-x)>>31)&(*hi-x));
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OIL_GET(dest,i*dstr, int16_t) = x;
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}
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}
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OIL_DEFINE_IMPL (clip_s16_fast, clip_s16);
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static void
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clip_s16_fast2 (int16_t *dest, int dstr, int16_t *src, int sstr, int n,
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int16_t *low, int16_t *hi)
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{
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int32_t x1, x2;
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if (n&1) {
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x1 = *src;
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OIL_INCREMENT(src,sstr);
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x1 -= (((x1-*low)>>31)&(x1-*low));
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*dest = x1 + (((*hi-x1)>>31)&(*hi-x1));
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OIL_INCREMENT(dest,dstr);
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n--;
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}
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while(n>0){
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x1 = *src;
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OIL_INCREMENT(src,sstr);
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x2 = *src;
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OIL_INCREMENT(src,sstr);
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x1 -= (((x1-*low)>>31)&(x1-*low));
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x2 -= (((x2-*low)>>31)&(x2-*low));
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*dest = x1 + (((*hi-x1)>>31)&(*hi-x1));
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OIL_INCREMENT(dest,dstr);
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*dest = x2 + (((*hi-x2)>>31)&(*hi-x2));
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OIL_INCREMENT(dest,dstr);
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n-=2;
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}
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}
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OIL_DEFINE_IMPL (clip_s16_fast2, clip_s16);
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#if 0
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/* broken */
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/* This trick clips
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* the range min^(1<<31) to max^(1<<31) incorrectly with int32_t.
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* Thus the use of int64_t. */
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static void
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clip_s32_fast (int32_t *dest, int dstr, int32_t *src, int sstr, int n,
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int32_t *low, int32_t *hi)
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{
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int i;
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int64_t x;
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for(i=0;i<n;i++){
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x = OIL_GET(src,i*sstr,int32_t);
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x = x - (((x-*low)>>63)&(x-*low)) + (((*hi-x)>>63)&(*hi-x));
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OIL_GET(dest,i*dstr,int32_t) = x;
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}
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}
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OIL_DEFINE_IMPL (clip_s32_fast, clip_s32);
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#endif
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#ifdef __SYMBIAN32__
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OilFunctionImpl* __oil_function_impl_clip_s16_fast() {
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return &_oil_function_impl_clip_s16_fast;
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}
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#endif
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#ifdef __SYMBIAN32__
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OilFunctionImpl* __oil_function_impl_clip_s16_fast2() {
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return &_oil_function_impl_clip_s16_fast2;
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}
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#endif
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#if 0
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#ifdef __SYMBIAN32__
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OilFunctionImpl* __oil_function_impl_clip_s32_fast() {
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return &_oil_function_impl_clip_s32_fast;
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}
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#endif
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#endif
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