added const declarations to coefficients for FFT

openair1/PHY/TOOLS/lte_dfts.c

@@ -58,10 +58,10 @@
 #define print_ints(s,x) printf("%s %d %d %d %d\n",s,(x)[0],(x)[1],(x)[2],(x)[3])
 
 
-static int16_t conjugatedft[32] __attribute__((aligned(32))) = {-1,1,-1,1,-1,1,-1,1,-1,1,-1,1,-1,1,-1,1,-1,1};
+const static int16_t conjugatedft[32] __attribute__((aligned(32))) = {-1,1,-1,1,-1,1,-1,1,-1,1,-1,1,-1,1,-1,1,-1,1};
 
 
-static int16_t reflip[32]  __attribute__((aligned(32))) = {1,-1,1,-1,1,-1,1,-1,1,-1,1,-1,1,-1,1,-1};
+const static int16_t reflip[32]  __attribute__((aligned(32))) = {1,-1,1,-1,1,-1,1,-1,1,-1,1,-1,1,-1,1,-1};
 
 #if defined(__x86_64__) || defined(__i386__)
 static inline void cmac(__m128i a,__m128i b, __m128i *re32, __m128i *im32) __attribute__((always_inline));
@@ -474,33 +474,33 @@ static inline int16x8_t packed_cmult2(int16x8_t a,int16x8_t b,  int16x8_t b2)
 
 #endif
 
-static int16_t W0s[16]__attribute__((aligned(32))) = {32767,0,32767,0,32767,0,32767,0,32767,0,32767,0,32767,0,32767,0};
+const static int16_t W0s[16]__attribute__((aligned(32))) = {32767,0,32767,0,32767,0,32767,0,32767,0,32767,0,32767,0,32767,0};
 
-static int16_t W13s[16]__attribute__((aligned(32))) = {-16384,-28378,-16384,-28378,-16384,-28378,-16384,-28378,-16384,-28378,-16384,-28378,-16384,-28378,-16384,-28378};
-static int16_t W23s[16]__attribute__((aligned(32))) = {-16384,28378,-16384,28378,-16384,28378,-16384,28378,-16384,28378,-16384,28378,-16384,28378,-16384,28378};
+const static int16_t W13s[16]__attribute__((aligned(32))) = {-16384,-28378,-16384,-28378,-16384,-28378,-16384,-28378,-16384,-28378,-16384,-28378,-16384,-28378,-16384,-28378};
+const static int16_t W23s[16]__attribute__((aligned(32))) = {-16384,28378,-16384,28378,-16384,28378,-16384,28378,-16384,28378,-16384,28378,-16384,28378,-16384,28378};
 
-static int16_t W15s[16]__attribute__((aligned(32))) = {10126,-31163,10126,-31163,10126,-31163,10126,-31163,10126,-31163,10126,-31163,10126,-31163,10126,-31163};
-static int16_t W25s[16]__attribute__((aligned(32))) = {-26509,-19260,-26509,-19260,-26509,-19260,-26509,-19260,-26509,-19260,-26509,-19260,-26509,-19260,-26509,-19260};
-static int16_t W35s[16]__attribute__((aligned(32))) = {-26510,19260,-26510,19260,-26510,19260,-26510,19260,-26510,19260,-26510,19260,-26510,19260,-26510,19260};
-static int16_t W45s[16]__attribute__((aligned(32))) = {10126,31163,10126,31163,10126,31163,10126,31163,10126,31163,10126,31163,10126,31163,10126,31163};
+const static int16_t W15s[16]__attribute__((aligned(32))) = {10126,-31163,10126,-31163,10126,-31163,10126,-31163,10126,-31163,10126,-31163,10126,-31163,10126,-31163};
+const static int16_t W25s[16]__attribute__((aligned(32))) = {-26509,-19260,-26509,-19260,-26509,-19260,-26509,-19260,-26509,-19260,-26509,-19260,-26509,-19260,-26509,-19260};
+const static int16_t W35s[16]__attribute__((aligned(32))) = {-26510,19260,-26510,19260,-26510,19260,-26510,19260,-26510,19260,-26510,19260,-26510,19260,-26510,19260};
+const static int16_t W45s[16]__attribute__((aligned(32))) = {10126,31163,10126,31163,10126,31163,10126,31163,10126,31163,10126,31163,10126,31163,10126,31163};
 
 #if defined(__x86_64__) || defined(__i386__)
-__m128i *W0 = (__m128i *)W0s;
-__m128i *W13 = (__m128i *)W13s;
-__m128i *W23 = (__m128i *)W23s;
-__m128i *W15 = (__m128i *)W15s;
-__m128i *W25 = (__m128i *)W25s;
-__m128i *W35 = (__m128i *)W35s;
-__m128i *W45 = (__m128i *)W45s;
+const __m128i *W0 = (__m128i *)W0s;
+const __m128i *W13 = (__m128i *)W13s;
+const __m128i *W23 = (__m128i *)W23s;
+const __m128i *W15 = (__m128i *)W15s;
+const __m128i *W25 = (__m128i *)W25s;
+const __m128i *W35 = (__m128i *)W35s;
+const __m128i *W45 = (__m128i *)W45s;
 
 #ifdef __AVX2__
-__m256i *W0_256 =  (__m256i *)W0s;
-__m256i *W13_256 = (__m256i *)W13s;
-__m256i *W23_256 = (__m256i *)W23s;
-__m256i *W15_256 = (__m256i *)W15s;
-__m256i *W25_256 = (__m256i *)W25s;
-__m256i *W35_256 = (__m256i *)W35s;
-__m256i *W45_256 = (__m256i *)W45s;
+const __m256i *W0_256 =  (__m256i *)W0s;
+const __m256i *W13_256 = (__m256i *)W13s;
+const __m256i *W23_256 = (__m256i *)W23s;
+const __m256i *W15_256 = (__m256i *)W15s;
+const __m256i *W25_256 = (__m256i *)W25s;
+const __m256i *W35_256 = (__m256i *)W35s;
+const __m256i *W45_256 = (__m256i *)W45s;
 #endif
 
 #elif defined(__arm__)
@@ -512,23 +512,23 @@ int16x8_t *W25 = (int16x8_t *)W25s;
 int16x8_t *W35 = (int16x8_t *)W35s;
 int16x8_t *W45 = (int16x8_t *)W45s;
 #endif
-static int16_t dft_norm_table[16] = {9459,  //12
-                                     6689,//24
-                                     5461,//36
-                                     4729,//482
-                                     4230,//60
-                                     23170,//72
-                                     3344,//96
-                                     3153,//108
-                                     2991,//120
-                                     18918,//sqrt(3),//144
-                                     18918,//sqrt(3),//180
-                                     16384,//2, //192
-                                     18918,//sqrt(3), // 216
-                                     16384,//2, //240
-                                     18918,//sqrt(3), // 288
-                                     14654
-                                    }; //sqrt(5) //300
+const static int16_t dft_norm_table[16] = {9459,  //12
+					   6689,//24
+					   5461,//36
+					   4729,//482
+					   4230,//60
+					   23170,//72
+					   3344,//96
+					   3153,//108
+					   2991,//120
+					   18918,//sqrt(3),//144
+					   18918,//sqrt(3),//180
+					   16384,//2, //192
+					   18918,//sqrt(3), // 216
+					   16384,//2, //240
+					   18918,//sqrt(3), // 288
+					   14654
+}; //sqrt(5) //300
 
 
 #if defined(__x86_64__) || defined(__i386__)
@@ -2036,42 +2036,42 @@ static inline void transpose4_ooff(int16x4_t *x,int16x4_t *y,int off)
 
 // 16-point optimized DFT kernel
 
-int16_t tw16[24] __attribute__((aligned(32))) = { 32767,0,30272,-12540,23169 ,-23170,12539 ,-30273,
+const static int16_t tw16[24] __attribute__((aligned(32))) = { 32767,0,30272,-12540,23169 ,-23170,12539 ,-30273,
                                                   32767,0,23169,-23170,0     ,-32767,-23170,-23170,
                                                   32767,0,12539,-30273,-23170,-23170,-30273,12539
                                                 };
 
-int16_t tw16a[24] __attribute__((aligned(32))) = {32767,0,30272,12540,23169 ,23170,12539 ,30273,
+const static int16_t tw16a[24] __attribute__((aligned(32))) = {32767,0,30272,12540,23169 ,23170,12539 ,30273,
                                                   32767,0,23169,23170,0     ,32767,-23170,23170,
                                                   32767,0,12539,30273,-23170,23170,-30273,-12539
                                                  };
 
-int16_t tw16b[24] __attribute__((aligned(32))) = { 0,32767,-12540,30272,-23170,23169 ,-30273,12539,
+const static int16_t tw16b[24] __attribute__((aligned(32))) = { 0,32767,-12540,30272,-23170,23169 ,-30273,12539,
                                                    0,32767,-23170,23169,-32767,0     ,-23170,-23170,
                                                    0,32767,-30273,12539,-23170,-23170,12539 ,-30273
                                                  };
 
-int16_t tw16c[24] __attribute__((aligned(32))) = { 0,32767,12540,30272,23170,23169 ,30273 ,12539,
+const static int16_t tw16c[24] __attribute__((aligned(32))) = { 0,32767,12540,30272,23170,23169 ,30273 ,12539,
                                                    0,32767,23170,23169,32767,0     ,23170 ,-23170,
                                                    0,32767,30273,12539,23170,-23170,-12539,-30273
                                                  };
 
-int16_t tw16rep[48] __attribute__((aligned(32))) = { 32767,0,30272,-12540,23169 ,-23170,12539 ,-30273,32767,0,30272,-12540,23169 ,-23170,12539 ,-30273,
+const static int16_t tw16rep[48] __attribute__((aligned(32))) = { 32767,0,30272,-12540,23169 ,-23170,12539 ,-30273,32767,0,30272,-12540,23169 ,-23170,12539 ,-30273,
 						     32767,0,23169,-23170,0     ,-32767,-23170,-23170,32767,0,23169,-23170,0     ,-32767,-23170,-23170,
 						     32767,0,12539,-30273,-23170,-23170,-30273,12539,32767,0,12539,-30273,-23170,-23170,-30273,12539
                                                    };
 
-int16_t tw16arep[48] __attribute__((aligned(32))) = {32767,0,30272,12540,23169 ,23170,12539 ,30273,32767,0,30272,12540,23169 ,23170,12539 ,30273,
+const static int16_t tw16arep[48] __attribute__((aligned(32))) = {32767,0,30272,12540,23169 ,23170,12539 ,30273,32767,0,30272,12540,23169 ,23170,12539 ,30273,
 						     32767,0,23169,23170,0     ,32767,-23170,23170,32767,0,23169,23170,0     ,32767,-23170,23170,
 						     32767,0,12539,30273,-23170,23170,-30273,-12539,32767,0,12539,30273,-23170,23170,-30273,-12539
                                                     }; 
 
-int16_t tw16brep[48] __attribute__((aligned(32))) = { 0,32767,-12540,30272,-23170,23169 ,-30273,12539,0,32767,-12540,30272,-23170,23169 ,-30273,12539,
+const static int16_t tw16brep[48] __attribute__((aligned(32))) = { 0,32767,-12540,30272,-23170,23169 ,-30273,12539,0,32767,-12540,30272,-23170,23169 ,-30273,12539,
                                                       0,32767,-23170,23169,-32767,0     ,-23170,-23170,0,32767,-23170,23169,-32767,0     ,-23170,-23170,
                                                       0,32767,-30273,12539,-23170,-23170,12539 ,-30273,0,32767,-30273,12539,-23170,-23170,12539 ,-30273
                                                     };
 
-int16_t tw16crep[48] __attribute__((aligned(32))) = { 0,32767,12540,30272,23170,23169 ,30273 ,12539,0,32767,12540,30272,23170,23169 ,30273 ,12539,
+const static int16_t tw16crep[48] __attribute__((aligned(32))) = { 0,32767,12540,30272,23170,23169 ,30273 ,12539,0,32767,12540,30272,23170,23169 ,30273 ,12539,
 						      0,32767,23170,23169,32767,0     ,23170 ,-23170,0,32767,23170,23169,32767,0     ,23170 ,-23170,
 						      0,32767,30273,12539,23170,-23170,-12539,-30273,0,32767,30273,12539,23170,-23170,-12539,-30273
                                                     };
@@ -2502,7 +2502,7 @@ static inline void idft16_simd256(int16_t *x,int16_t *y)
 
 // 64-point optimized DFT
 
-int16_t tw64[96] __attribute__((aligned(32))) = { 
+const static int16_t tw64[96] __attribute__((aligned(32))) = { 
 32767,0,32609,-3212,32137,-6393,31356,-9512,
 30272,-12540,28897,-15447,27244,-18205,25329,-20788,
 23169,-23170,20787,-25330,18204,-27245,15446,-28898,
@@ -2517,7 +2517,7 @@ int16_t tw64[96] __attribute__((aligned(32))) = {
 -30273,12539,-25330,20787,-18205,27244,-9512,31356
                                                 };
 
-int16_t tw64rep[192] __attribute__((aligned(32))) = { 
+const static int16_t tw64rep[192] __attribute__((aligned(32))) = { 
 32767,0,32609,-3212,32137,-6393,31356,-9512,32767,0,32609,-3212,32137,-6393,31356,-9512,
 30272,-12540,28897,-15447,27244,-18205,25329,-20788,30272,-12540,28897,-15447,27244,-18205,25329,-20788,
 23169,-23170,20787,-25330,18204,-27245,15446,-28898,23169,-23170,20787,-25330,18204,-27245,15446,-28898,
@@ -2532,7 +2532,7 @@ int16_t tw64rep[192] __attribute__((aligned(32))) = {
 -30273,12539,-25330,20787,-18205,27244,-9512,31356,-30273,12539,-25330,20787,-18205,27244,-9512,31356
                                                 };
 
-int16_t tw64a[96] __attribute__((aligned(32))) = { 
+const static int16_t tw64a[96] __attribute__((aligned(32))) = { 
 32767,0,32609,3212,32137,6393,31356,9512,
 30272,12540,28897,15447,27244,18205,25329,20788,
 23169,23170,20787,25330,18204,27245,15446,28898,
@@ -2546,7 +2546,7 @@ int16_t tw64a[96] __attribute__((aligned(32))) = {
 -23170,23170,-28898,15447,-32138,6393,-32610,-3211,
 -30273,-12539,-25330,-20787,-18205,-27244,-9512,-31356
                                                  };
-int16_t tw64arep[192] __attribute__((aligned(32))) = { 
+const static int16_t tw64arep[192] __attribute__((aligned(32))) = { 
 32767,0,32609,3212,32137,6393,31356,9512,32767,0,32609,3212,32137,6393,31356,9512,
 30272,12540,28897,15447,27244,18205,25329,20788,30272,12540,28897,15447,27244,18205,25329,20788,
 23169,23170,20787,25330,18204,27245,15446,28898,23169,23170,20787,25330,18204,27245,15446,28898,
@@ -2561,7 +2561,7 @@ int16_t tw64arep[192] __attribute__((aligned(32))) = {
 -30273,-12539,-25330,-20787,-18205,-27244,-9512,-31356,-30273,-12539,-25330,-20787,-18205,-27244,-9512,-31356
                                                  };
 
-int16_t tw64b[96] __attribute__((aligned(32))) = { 
+const static int16_t tw64b[96] __attribute__((aligned(32))) = { 
 0,32767,-3212,32609,-6393,32137,-9512,31356,
 -12540,30272,-15447,28897,-18205,27244,-20788,25329,
 -23170,23169,-25330,20787,-27245,18204,-28898,15446,
@@ -2576,7 +2576,7 @@ int16_t tw64b[96] __attribute__((aligned(32))) = {
 12539,-30273,20787,-25330,27244,-18205,31356,-9512
                                                  };
 
-int16_t tw64brep[192] __attribute__((aligned(32))) = { 
+const static int16_t tw64brep[192] __attribute__((aligned(32))) = { 
 0,32767,-3212,32609,-6393,32137,-9512,31356,0,32767,-3212,32609,-6393,32137,-9512,31356,
 -12540,30272,-15447,28897,-18205,27244,-20788,25329,-12540,30272,-15447,28897,-18205,27244,-20788,25329,
 -23170,23169,-25330,20787,-27245,18204,-28898,15446,-23170,23169,-25330,20787,-27245,18204,-28898,15446,
@@ -2591,7 +2591,7 @@ int16_t tw64brep[192] __attribute__((aligned(32))) = {
 12539,-30273,20787,-25330,27244,-18205,31356,-9512,12539,-30273,20787,-25330,27244,-18205,31356,-9512
                                                  };
 
-int16_t tw64c[96] __attribute__((aligned(32))) = { 
+const static int16_t tw64c[96] __attribute__((aligned(32))) = { 
 0,32767,3212,32609,6393,32137,9512,31356,
 12540,30272,15447,28897,18205,27244,20788,25329,
 23170,23169,25330,20787,27245,18204,28898,15446,
@@ -2606,7 +2606,7 @@ int16_t tw64c[96] __attribute__((aligned(32))) = {
 -12539,-30273,-20787,-25330,-27244,-18205,-31356,-9512
                                                  };
 
-int16_t tw64crep[192] __attribute__((aligned(32))) = { 
+const static int16_t tw64crep[192] __attribute__((aligned(32))) = { 
 0,32767,3212,32609,6393,32137,9512,31356,0,32767,3212,32609,6393,32137,9512,31356,
 12540,30272,15447,28897,18205,27244,20788,25329,12540,30272,15447,28897,18205,27244,20788,25329,
 23170,23169,25330,20787,27245,18204,28898,15446,23170,23169,25330,20787,27245,18204,28898,15446,