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added simd capability

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This commit is contained in:
Mark Borgerding
2005-06-24 03:03:31 +00:00
parent 24be1c5850
commit 7f6cbeab2e
10 changed files with 112 additions and 9 deletions
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15
test/twotonetest.c
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@ -5,8 +5,6 @@
#include "kiss_fftr.h"
#include <limits.h>
#define pcpx(c)\
fprintf(stderr,"%g + %gi\n",(double)((c)->r),(double)((c)->i) )
static
double two_tone_test( int nfft, int bin1,int bin2)
@ -27,20 +25,25 @@ double two_tone_test( int nfft, int bin1,int bin2)
#endif
cfg = kiss_fftr_alloc(nfft , 0, NULL, NULL);
tbuf = malloc(nfft * sizeof(kiss_fft_scalar));
kout = malloc(nfft * sizeof(kiss_fft_cpx));
tbuf = memalign(sizeof(kiss_fft_scalar),nfft * sizeof(kiss_fft_scalar));
kout = memalign(sizeof(kiss_fft_scalar),nfft * sizeof(kiss_fft_cpx));
/* generate a signal with two tones*/
for (i = 0; i < nfft; i++) {
#ifdef USE_SIMD
tbuf[i] = _mm_set1_ps( (maxrange>>1)*cos(f1*i)
+ (maxrange>>1)*cos(f2*i) );
#else
tbuf[i] = (maxrange>>1)*cos(f1*i)
+ (maxrange>>1)*cos(f2*i);
#endif
}
kiss_fftr(cfg, tbuf, kout);
for (i=0;i < (nfft/2+1);++i) {
double tmpr = (double)kout[i].r / (double)maxrange;
double tmpi = (double)kout[i].i / (double)maxrange;
double tmpr = (double)*(float*)&kout[i].r / (double)maxrange;
double tmpi = (double)*(float*)&kout[i].i / (double)maxrange;
double mag2 = tmpr*tmpr + tmpi*tmpi;
if (i!=0 && i!= nfft/2)
mag2 *= 2; /* all bins except DC and Nyquist have symmetric counterparts implied*/