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177 lines
4.6 KiB
177 lines
4.6 KiB
/*
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This file is part of SFFT.
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Copyright (c) 2012, Anthony M. Blake
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All rights reserved.
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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 are met:
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* 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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* 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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* Neither the name of the organization nor the
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names of its contributors may be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL ANTHONY M. BLAKE BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <stdio.h>
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#include <math.h>
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#ifdef __ARM_NEON__
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#endif
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#ifdef HAVE_SSE
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#include <xmmintrin.h>
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#endif
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#include "../include/ffts.h"
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#define PI 3.1415926535897932384626433832795028841971693993751058209
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float impulse_error(int N, int sign, float *data) {
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#ifdef __ANDROID__
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double delta_sum = 0.0f;
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double sum = 0.0f;
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#else
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long double delta_sum = 0.0f;
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long double sum = 0.0f;
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#endif
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int i;
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for(i=0;i<N;i++) {
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#ifdef __ANDROID__
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double re, im;
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if(sign < 0) {
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re = cos(2 * PI * (double)i / (double)N);
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im = -sin(2 * PI * (double)i / (double)N);
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}else{
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re = cos(2 * PI * (double)i / (double)N);
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im = sin(2 * PI * (double)i / (double)N);
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}
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#else
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long double re, im;
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if(sign < 0) {
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re = cosl(2 * PI * (long double)i / (long double)N);
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im = -sinl(2 * PI * (long double)i / (long double)N);
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}else{
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re = cosl(2 * PI * (long double)i / (long double)N);
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im = sinl(2 * PI * (long double)i / (long double)N);
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}
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#endif
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sum += re * re + im * im;
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re = re - data[2*i];
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im = im - data[2*i+1];
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delta_sum += re * re + im * im;
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}
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#ifdef __ANDROID__
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return sqrt(delta_sum) / sqrt(sum);
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#else
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return sqrtl(delta_sum) / sqrtl(sum);
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#endif
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}
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int
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test_transform(int n, int sign) {
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#ifdef HAVE_SSE
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float __attribute__ ((aligned(32))) *input = _mm_malloc(2 * n * sizeof(float), 32);
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float __attribute__ ((aligned(32))) *output = _mm_malloc(2 * n * sizeof(float), 32);
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#else
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float __attribute__ ((aligned(32))) *input = valloc(2 * n * sizeof(float));
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float __attribute__ ((aligned(32))) *output = valloc(2 * n * sizeof(float));
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#endif
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int i;
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for(i=0;i<n;i++) {
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input[2*i] = 0.0f;
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input[2*i+1] = 0.0f;
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}
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input[2] = 1.0f;
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ffts_plan_t *p = ffts_init_1d(i, sign);
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if(p) {
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ffts_execute(p, input, output);
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printf(" %3d | %9d | %10E\n", sign, n, impulse_error(n, sign, output));
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ffts_free(p);
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}else{
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printf("Plan unsupported\n");
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return 0;
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}
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return 1;
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}
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int
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main(int argc, char *argv[]) {
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if(argc == 3) {
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// test specific transform with test pattern and display output
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int n = atoi(argv[1]);
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int sign = atoi(argv[2]);
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#ifdef HAVE_SSE
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float __attribute__ ((aligned(32))) *input = _mm_malloc(2 * n * sizeof(float), 32);
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float __attribute__ ((aligned(32))) *output = _mm_malloc(2 * n * sizeof(float), 32);
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#else
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float __attribute__ ((aligned(32))) *input = valloc(2 * n * sizeof(float));
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float __attribute__ ((aligned(32))) *output = valloc(2 * n * sizeof(float));
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#endif
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int i;
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for(i=0;i<n;i++) {
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input[2*i] = i;
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input[2*i+1] = 0.0f;
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}
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// input[2] = 1.0f;
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ffts_plan_t *p = ffts_init_1d(i, sign);
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if(p) {
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ffts_execute(p, input, output);
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for(i=0;i<n;i++) printf("%d %d %f %f\n", i, sign, output[2*i], output[2*i+1]);
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ffts_free(p);
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}else{
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printf("Plan unsupported\n");
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return 0;
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}
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#ifdef HAVE_NEON
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_mm_free(input);
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_mm_free(output);
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#else
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free(input);
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free(output);
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#endif
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}else{
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// test various sizes and display error
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printf(" Sign | Size | L2 Error\n");
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printf("------+-----------+-------------\n");
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int n;
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for(n=1;n<=18;n++) {
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test_transform(pow(2,n), -1);
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}
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for(n=1;n<=18;n++) {
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test_transform(pow(2,n), 1);
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}
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}
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return 0;
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}
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