ChTheo/FFT_and_FP_math
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replaced twiddles arrays definition by lazy definition (via macros and #ifndef)

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Theodor Chikin
2025-10-09 14:41:57 +03:00
parent 1256c9b807
commit 86f488e456
3 changed files with 18 additions and 0 deletions
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11
.project Normal file
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@ -0,0 +1,11 @@
<?xml version="1.0" encoding="UTF-8"?>
<projectDescription>
<name>Theta_fourier</name>
<comment></comment>
<projects>
</projects>
<buildSpec>
</buildSpec>
<natures>
</natures>
</projectDescription>

2
C/FFT_FP_realisation.c
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@ -3,8 +3,10 @@
#include <math.h> #include <math.h>
#include <stdio.h> #include <stdio.h>
#ifndef FFT_FP_EXTERNAL_TWIDDLES
static int64_t twiddle_re[TWIDDLE_L] = {0,}; static int64_t twiddle_re[TWIDDLE_L] = {0,};
static int64_t twiddle_im[TWIDDLE_L] = {0,}; static int64_t twiddle_im[TWIDDLE_L] = {0,};
#endif
void fft_twiddle_gen(int64_t* tw_re, int64_t* tw_im){ void fft_twiddle_gen(int64_t* tw_re, int64_t* tw_im){
for (uint32_t k = 0; k < TWIDDLE_L; ++k){ for (uint32_t k = 0; k < TWIDDLE_L; ++k){

5
C/FFT_FP_realisation.h
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@ -19,6 +19,11 @@
#define PI 3.141592653589793238462643383279502884197169399375105820974944 #define PI 3.141592653589793238462643383279502884197169399375105820974944
#endif #endif
#ifdef FFT_FP_EXTERNAL_TWIDDLES
extern int64_t twiddle_re[TWIDDLE_L];
extern int64_t twiddle_im[TWIDDLE_L];
#endif
void fft_twiddle_gen(int64_t* twiddle_re, int64_t* twiddle_im); void fft_twiddle_gen(int64_t* twiddle_re, int64_t* twiddle_im);
void fft_fp_prepare(void); void fft_fp_prepare(void);
void FFT_fp(int64_t* inp, uint32_t inp_L, int64_t* buf); void FFT_fp(int64_t* inp, uint32_t inp_L, int64_t* buf);