From 5e36a64acb1a63ae2c4fe4b461fe90592fa8e39f Mon Sep 17 00:00:00 2001
From: Theodor Chikin <feda012045@gmail.com>
Date: Thu, 9 Oct 2025 15:38:10 +0300
Subject: [PATCH] now printf is disabled if twiddles arrays are external. Now
 while used for emdedded there is no prfintf garbage in compiled code.

---
 C/FFT_FP_realisation.c | 8 ++++++++
 C/FFT_FP_realisation.h | 4 ++--
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/C/FFT_FP_realisation.c b/C/FFT_FP_realisation.c
index ec6bdf1..fd5561c 100644
--- a/C/FFT_FP_realisation.c
+++ b/C/FFT_FP_realisation.c
@@ -6,8 +6,11 @@
 #ifndef FFT_FP_EXTERNAL_TWIDDLES
 static int64_t twiddle_re[TWIDDLE_L] = {0,};
 static int64_t twiddle_im[TWIDDLE_L] = {0,};
+#define PRINTF
 #endif
 
+
+
 void fft_twiddle_gen(int64_t* tw_re, int64_t* tw_im){
 	for (uint32_t k = 0; k < TWIDDLE_L; ++k){
 		double angle = 2.0 * PI * k / DATA_L;
@@ -19,7 +22,9 @@ void fft_twiddle_gen(int64_t* tw_re, int64_t* tw_im){
 void fft_fp_prepare(void){
 	fft_twiddle_gen(twiddle_re, twiddle_im);
 	for (uint32_t k = 0; k < TWIDDLE_L; ++k){
+#ifdef PRINTF
 		printf("k, angle, tw_re, tw_im: %u %g %lld %lld\n", k, 2.0 * PI * k / DATA_L, (long long)twiddle_re[k], (long long)twiddle_im[k]);
+#endif
 	}
 }
 
@@ -90,7 +95,10 @@ void FFT_fp(int64_t* inp, uint32_t inp_L, int64_t* buf){
 	    for (uint32_t ii = 0; ii < inp_L; ++ii){
 	    	buf[ii*2] /= inp_L;
 	    	buf[ii*2+1] /= inp_L;
+#ifdef PRINTF
 	    	printf("re,im: %lld, %lld\n", (long long)buf[ii*2], (long long)buf[ii*2 +1]);
+#endif
+
 	    }
 
 }
diff --git a/C/FFT_FP_realisation.h b/C/FFT_FP_realisation.h
index 6331ce8..2fcec2f 100644
--- a/C/FFT_FP_realisation.h
+++ b/C/FFT_FP_realisation.h
@@ -20,8 +20,8 @@
 #endif
 
 #ifdef FFT_FP_EXTERNAL_TWIDDLES
-extern int64_t twiddle_re[TWIDDLE_L];
-extern int64_t twiddle_im[TWIDDLE_L];
+extern volatile int64_t twiddle_re[TWIDDLE_L];
+extern volatile int64_t twiddle_im[TWIDDLE_L];
 #endif
 
 void fft_twiddle_gen(int64_t* twiddle_re, int64_t* twiddle_im);