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/*
* LIBOIL - Library of Optimized Inner Loops
* Copyright (c) 2001,2003,2004 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <liboil/liboilfunction.h>
#include <conv.h>
#include <math.h>
static void
conv_f64_s16_table(double *dest, int dest_stride, const short *src,
int src_stride, int n)
{
static double ints_high[256];
static double ints_low[256];
static int init = 0;
int i;
unsigned int idx;
if(!init){
for(i=0;i<256;i++){
ints_high[i]=256.0*((i<128)?i:i-256);
ints_low[i]=i;
}
init = 1;
}
if(n&1){
idx = (unsigned short)*src;
*dest = ints_high[(idx>>8)] + ints_low[(idx&0xff)];
OIL_INCREMENT(dest, dest_stride);
OIL_INCREMENT(src, src_stride);
n-=1;
}
for(i=0;i<n;i+=2){
idx = (unsigned short)*src;
*dest = ints_high[(idx>>8)] + ints_low[(idx&0xff)];
OIL_INCREMENT(dest, dest_stride);
OIL_INCREMENT(src, src_stride);
idx = (unsigned short)*src;
*dest = ints_high[(idx>>8)] + ints_low[(idx&0xff)];
OIL_INCREMENT(dest, dest_stride);
OIL_INCREMENT(src, src_stride);
}
}
OIL_DEFINE_IMPL(conv_f64_s16_table, conv_f64_s16);
static void
conv_f32_s16_table(float *dest, int dest_stride, const short *src,
int src_stride, int n)
{
static float ints_high[256];
static float ints_low[256];
static int init = 0;
int i;
unsigned int idx;
if(!init){
for(i=0;i<256;i++){
ints_high[i]=256.0*((i<128)?i:i-256);
ints_low[i]=i;
}
init = 1;
}
if(n&1){
idx = (unsigned short)*src;
*dest = ints_high[(idx>>8)] + ints_low[(idx&0xff)];
OIL_INCREMENT(dest, dest_stride);
OIL_INCREMENT(src, src_stride);
n-=1;
}
for(i=0;i<n;i+=2){
idx = (unsigned short)*src;
*dest = ints_high[(idx>>8)] + ints_low[(idx&0xff)];
OIL_INCREMENT(dest, dest_stride);
OIL_INCREMENT(src, src_stride);
idx = (unsigned short)*src;
*dest = ints_high[(idx>>8)] + ints_low[(idx&0xff)];
OIL_INCREMENT(dest, dest_stride);
OIL_INCREMENT(src, src_stride);
}
}
OIL_DEFINE_IMPL(conv_f32_s16_table, conv_f32_s16);
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