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#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <stdint.h>
#include "SIMDBase.h"
#include "DFT.h"
#define TYPE SIMDBase_TYPE_FLOAT
void rfft(int n,int isign,float *x) {
static DFT *p = NULL;
static float *buf = NULL;
static int ipsize = 0;
static int mode = 0;
static int veclen = 0;
int newipsize;
if (n == 0) {
if (buf) {
SIMDBase_alignedFree (buf);
buf = NULL;
}
if (p) {
DFT_dispose(p, mode);
p = NULL;
}
return;
}
int nn = n;
n = 1<<n;
newipsize = n;
if (newipsize != ipsize) {
ipsize = newipsize;
if (buf) {
SIMDBase_alignedFree (buf);
buf = NULL;
}
if (p) {
DFT_dispose(p, mode);
p = NULL;
}
buf = SIMDBase_alignedMalloc (n * sizeof (float));
mode = SIMDBase_chooseBestMode(TYPE);
veclen = SIMDBase_getModeParamInt(SIMDBase_PARAMID_VECTOR_LEN, mode);
int sizeOfVect = SIMDBase_getModeParamInt(SIMDBase_PARAMID_SIZE_OF_VECT, mode);
printf ("n: %d, veclen: %d, sizeOfVect: %d\n", n, veclen, sizeOfVect);
p = DFT_init(mode, n/veclen, DFT_FLAG_REAL);
}
// store in simd order
int asize = n / veclen;
int i, j;
for(j=0;j<veclen;j++) {
for (i = 0; i < asize; i++) {
buf[i * veclen + j] = x[j * asize + i];
}
}
DFT_execute(p, mode, buf, isign);
#define THRES 1e-3
for(j=0;j<veclen;j++) {
for (i = 0; i < asize; i++) {
x[j * asize + i] = buf[i * veclen + j];
}
}
}
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