CMSIS-DSP: arm_common_tables.c File Reference

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arm_common_tables.c File Reference

## Variables
const uint16_t | armBitRevTable [1024]
const float32_t | twiddleCoef_16 [32]
const float32_t | twiddleCoef_32 [64]
const float32_t | twiddleCoef_64 [128]
const float32_t | twiddleCoef_128 [256]
const float32_t | twiddleCoef_256 [512]
const float32_t | twiddleCoef_512 [1024]
const float32_t | twiddleCoef_1024 [2048]
const float32_t | twiddleCoef_2048 [4096]
const float32_t | twiddleCoef_4096 [8192]
const q31_t | twiddleCoef_16_q31 [24]
const q31_t | twiddleCoef_32_q31 [48]
const q31_t | twiddleCoef_64_q31 [96]
const q31_t | twiddleCoef_128_q31 [192]
const q31_t | twiddleCoef_256_q31 [384]
const q31_t | twiddleCoef_512_q31 [768]
const q31_t | twiddleCoef_1024_q31 [1536]
const q31_t | twiddleCoef_2048_q31 [3072]
const q31_t | twiddleCoef_4096_q31 [6144]
const q15_t | twiddleCoef_16_q15 [24]
const q15_t | twiddleCoef_32_q15 [48]
const q15_t | twiddleCoef_64_q15 [96]
const q15_t | twiddleCoef_128_q15 [192]
const q15_t | twiddleCoef_256_q15 [384]
const q15_t | twiddleCoef_512_q15 [768]
const q15_t | twiddleCoef_1024_q15 [1536]
const q15_t | twiddleCoef_2048_q15 [3072]
const q15_t | twiddleCoef_4096_q15 [6144]
const q15_t ALIGN4 | armRecipTableQ15 [64]
const q31_t | armRecipTableQ31 [64]
const uint16_t | armBitRevIndexTable16 [ARMBITREVINDEXTABLE_16_TABLE_LENGTH]
const uint16_t | armBitRevIndexTable32 [ARMBITREVINDEXTABLE_32_TABLE_LENGTH]
const uint16_t | armBitRevIndexTable64 [ARMBITREVINDEXTABLE_64_TABLE_LENGTH]
const uint16_t | armBitRevIndexTable128 [ARMBITREVINDEXTABLE_128_TABLE_LENGTH]
const uint16_t | armBitRevIndexTable256 [ARMBITREVINDEXTABLE_256_TABLE_LENGTH]
const uint16_t | armBitRevIndexTable512 [ARMBITREVINDEXTABLE_512_TABLE_LENGTH]
const uint16_t | armBitRevIndexTable1024 [ARMBITREVINDEXTABLE_1024_TABLE_LENGTH]
const uint16_t | armBitRevIndexTable2048 [ARMBITREVINDEXTABLE_2048_TABLE_LENGTH]
const uint16_t | armBitRevIndexTable4096 [ARMBITREVINDEXTABLE_4096_TABLE_LENGTH]
const uint16_t | armBitRevIndexTable_fixed_16 [ARMBITREVINDEXTABLE_FIXED_16_TABLE_LENGTH]
const uint16_t | armBitRevIndexTable_fixed_32 [ARMBITREVINDEXTABLE_FIXED_32_TABLE_LENGTH]
const uint16_t | armBitRevIndexTable_fixed_64 [ARMBITREVINDEXTABLE_FIXED_64_TABLE_LENGTH]
const uint16_t | armBitRevIndexTable_fixed_128 [ARMBITREVINDEXTABLE_FIXED_128_TABLE_LENGTH]
const uint16_t | armBitRevIndexTable_fixed_256 [ARMBITREVINDEXTABLE_FIXED_256_TABLE_LENGTH]
const uint16_t | armBitRevIndexTable_fixed_512 [ARMBITREVINDEXTABLE_FIXED_512_TABLE_LENGTH]
const uint16_t | armBitRevIndexTable_fixed_1024 [ARMBITREVINDEXTABLE_FIXED_1024_TABLE_LENGTH]
const uint16_t | armBitRevIndexTable_fixed_2048 [ARMBITREVINDEXTABLE_FIXED_2048_TABLE_LENGTH]
const uint16_t | armBitRevIndexTable_fixed_4096 [ARMBITREVINDEXTABLE_FIXED_4096_TABLE_LENGTH]
const float32_t | twiddleCoef_rfft_32 [32]
const float32_t | twiddleCoef_rfft_64 [64]
const float32_t | twiddleCoef_rfft_128 [128]
const float32_t | twiddleCoef_rfft_256 [256]
const float32_t | twiddleCoef_rfft_512 [512]
const float32_t | twiddleCoef_rfft_1024 [1024]
const float32_t | twiddleCoef_rfft_2048 [2048]
const float32_t | twiddleCoef_rfft_4096 [4096]
const float32_t | sinTable_f32 [FAST_MATH_TABLE_SIZE+1]
const q31_t | sinTable_q31 [FAST_MATH_TABLE_SIZE+1]
const q15_t | sinTable_q15 [FAST_MATH_TABLE_SIZE+1]

## Variable Documentation

const uint16_t armBitRevIndexTable1024[ARMBITREVINDEXTABLE_1024_TABLE_LENGTH]

Referenced by arm_rfft_fast_init_f32().

const uint16_t armBitRevIndexTable128[ARMBITREVINDEXTABLE_128_TABLE_LENGTH]

Referenced by arm_rfft_fast_init_f32().

const uint16_t armBitRevIndexTable16[ARMBITREVINDEXTABLE_16_TABLE_LENGTH]

Referenced by arm_rfft_fast_init_f32().

const uint16_t armBitRevIndexTable2048[ARMBITREVINDEXTABLE_2048_TABLE_LENGTH]

Referenced by arm_rfft_fast_init_f32().

const uint16_t armBitRevIndexTable256[ARMBITREVINDEXTABLE_256_TABLE_LENGTH]

Referenced by arm_rfft_fast_init_f32().

const uint16_t armBitRevIndexTable32[ARMBITREVINDEXTABLE_32_TABLE_LENGTH]

Referenced by arm_rfft_fast_init_f32().

const uint16_t armBitRevIndexTable4096[ARMBITREVINDEXTABLE_4096_TABLE_LENGTH]

const uint16_t armBitRevIndexTable512[ARMBITREVINDEXTABLE_512_TABLE_LENGTH]

Referenced by arm_rfft_fast_init_f32().

const uint16_t armBitRevIndexTable64[ARMBITREVINDEXTABLE_64_TABLE_LENGTH]

Referenced by arm_rfft_fast_init_f32().

const uint16_t armBitRevIndexTable_fixed_1024[ARMBITREVINDEXTABLE_FIXED_1024_TABLE_LENGTH]

const uint16_t armBitRevIndexTable_fixed_128[ARMBITREVINDEXTABLE_FIXED_128_TABLE_LENGTH]

const uint16_t armBitRevIndexTable_fixed_16[ARMBITREVINDEXTABLE_FIXED_16_TABLE_LENGTH]

const uint16_t armBitRevIndexTable_fixed_2048[ARMBITREVINDEXTABLE_FIXED_2048_TABLE_LENGTH]

const uint16_t armBitRevIndexTable_fixed_256[ARMBITREVINDEXTABLE_FIXED_256_TABLE_LENGTH]

const uint16_t armBitRevIndexTable_fixed_32[ARMBITREVINDEXTABLE_FIXED_32_TABLE_LENGTH]

const uint16_t armBitRevIndexTable_fixed_4096[ARMBITREVINDEXTABLE_FIXED_4096_TABLE_LENGTH]

const uint16_t armBitRevIndexTable_fixed_512[ARMBITREVINDEXTABLE_FIXED_512_TABLE_LENGTH]

const uint16_t armBitRevIndexTable_fixed_64[ARMBITREVINDEXTABLE_FIXED_64_TABLE_LENGTH]

const q15_t ALIGN4 armRecipTableQ15[64]

end of CFFT_CIFFT group

Referenced by arm_lms_norm_init_q15().

const q31_t armRecipTableQ31[64]

Referenced by arm_lms_norm_init_q31().

const float32_t sinTable_f32[FAST_MATH_TABLE_SIZE+1]

  Example code for the generation of the floating-point sine table:

      tableSize = 512;
      for(n = 0; n < (tableSize + 1); n++)
      {
           sinTable[n]=sin(2*pi*n/tableSize);
      }

  where pi value is 3.14159265358979

Referenced by arm_cos_f32(), arm_sin_cos_f32(), and arm_sin_f32().

const q15_t sinTable_q15[FAST_MATH_TABLE_SIZE+1]

  Table values are in Q15 (1.15 fixed-point format) and generation is done in three steps. First, generate sin values in floating point:

      tableSize = 512;
      for(n = 0; n < (tableSize + 1); n++)
      {
           sinTable[n]= sin(2*pi*n/tableSize);
      }

  where pi value is 3.14159265358979

  Second, convert floating-point to Q15 (Fixed point): (sinTable[i] * pow(2, 15))

  Finally, round to the nearest integer value: sinTable[i] += (sinTable[i] > 0 ? 0.5 :-0.5);

Referenced by arm_cos_q15(), and arm_sin_q15().

const q31_t sinTable_q31[FAST_MATH_TABLE_SIZE+1]

  Table values are in Q31 (1.31 fixed-point format) and generation is done in three steps. First, generate sin values in floating point:

      tableSize = 512;
      for(n = 0; n < (tableSize + 1); n++)
      {
           sinTable[n]= sin(2*pi*n/tableSize);
      }

  where pi value is 3.14159265358979

  Second, convert floating-point to Q31 (Fixed point): (sinTable[i] * pow(2, 31))

  Finally, round to the nearest integer value: sinTable[i] += (sinTable[i] > 0 ? 0.5 :-0.5);

Referenced by arm_cos_q31(), arm_sin_cos_q31(), and arm_sin_q31().

const float32_t twiddleCoef_rfft_1024[1024]

Referenced by arm_rfft_fast_init_f32().

const float32_t twiddleCoef_rfft_128[128]

Referenced by arm_rfft_fast_init_f32().

const float32_t twiddleCoef_rfft_2048[2048]

Referenced by arm_rfft_fast_init_f32().

const float32_t twiddleCoef_rfft_256[256]

Referenced by arm_rfft_fast_init_f32().

const float32_t twiddleCoef_rfft_32[32]

  Example code for Floating-point RFFT Twiddle factors Generation:

      TW = exp(2*pi*i*[0:L/2-1]/L - pi/2*i).'

  Real and Imag values are in interleaved fashion

Referenced by arm_rfft_fast_init_f32().

const float32_t twiddleCoef_rfft_4096[4096]

Referenced by arm_rfft_fast_init_f32().

const float32_t twiddleCoef_rfft_512[512]

Referenced by arm_rfft_fast_init_f32().

const float32_t twiddleCoef_rfft_64[64]

Referenced by arm_rfft_fast_init_f32().