mirror/kissfft
1
0
Fork 0
mirror of https://github.com/mborgerding/kissfft.git synced 2025-07-14 11:04:18 -04:00
Code Issues Packages Projects Releases Wiki Activity

polishing SIMD changes

Browse Source
This commit is contained in:
Mark Borgerding
2005-06-25 04:38:19 +00:00
parent 95fd244f93
commit 4be23bffa4
10 changed files with 75 additions and 69 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
test/twotonetest.c
View File

@ -25,14 +25,14 @@ double two_tone_test( int nfft, int bin1,int bin2)
#endif
cfg = kiss_fftr_alloc(nfft , 0, NULL, NULL);
tbuf = memalign(sizeof(kiss_fft_scalar),nfft * sizeof(kiss_fft_scalar));
kout = memalign(sizeof(kiss_fft_scalar),nfft * sizeof(kiss_fft_cpx));
tbuf = KISS_FFT_MALLOC(nfft * sizeof(kiss_fft_scalar));
kout = KISS_FFT_MALLOC(nfft * sizeof(kiss_fft_cpx));
/* generate a signal with two tones*/
for (i = 0; i < nfft; i++) {
#ifdef USE_SIMD
#ifdef USE_SIMD
tbuf[i] = _mm_set1_ps( (maxrange>>1)*cos(f1*i)
+ (maxrange>>1)*cos(f2*i) );
+ (maxrange>>1)*cos(f2*i) );
#else
tbuf[i] = (maxrange>>1)*cos(f1*i)
+ (maxrange>>1)*cos(f2*i);
@ -42,8 +42,13 @@ double two_tone_test( int nfft, int bin1,int bin2)
kiss_fftr(cfg, tbuf, kout);
for (i=0;i < (nfft/2+1);++i) {
#ifdef USE_SIMD
double tmpr = (double)*(float*)&kout[i].r / (double)maxrange;
double tmpi = (double)*(float*)&kout[i].i / (double)maxrange;
#else
double tmpr = (double)kout[i].r / (double)maxrange;
double tmpi = (double)kout[i].i / (double)maxrange;
#endif
double mag2 = tmpr*tmpr + tmpi*tmpi;
if (i!=0 && i!= nfft/2)
mag2 *= 2; /* all bins except DC and Nyquist have symmetric counterparts implied*/