Complex FFT Tables

const uint16_t riscvBitRevTable[1024]

const uint64_t twiddleCoefF64_16[32]

const uint64_t twiddleCoefF64_32[64]

const uint64_t twiddleCoefF64_64[128]

const uint64_t twiddleCoefF64_128[256]

const uint64_t twiddleCoefF64_256[512]

const uint64_t twiddleCoefF64_512[1024]

const uint64_t twiddleCoefF64_1024[2048]

const uint64_t twiddleCoefF64_2048[4096]

const uint64_t twiddleCoefF64_4096[8192]

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 float16_t twiddleCoefF16_16[32]

const float16_t twiddleCoefF16_32[64]

const float16_t twiddleCoefF16_64[128]

const float16_t twiddleCoefF16_128[256]

const float16_t twiddleCoefF16_256[512]

const float16_t twiddleCoefF16_512[1024]

const float16_t twiddleCoefF16_1024[2048]

const float16_t twiddleCoefF16_2048[4096]

const float16_t twiddleCoefF16_4096[8192]

const float16_t twiddleCoefF16_rfft_32[32]

const float16_t twiddleCoefF16_rfft_64[64]

const float16_t twiddleCoefF16_rfft_128[128]

const float16_t twiddleCoefF16_rfft_256[256]

const float16_t twiddleCoefF16_rfft_512[512]

const float16_t twiddleCoefF16_rfft_1024[1024]

const float16_t twiddleCoefF16_rfft_2048[2048]

const float16_t twiddleCoefF16_rfft_4096[4096]

group CFFT_CIFFT

Variables

const uint16_t riscvBitRevTable[1024]

Table for bit reversal process.

: Pseudo code for Generation of Bit reversal Table is

: where N = 4096, logN2 = 12
: N is the maximum FFT Size supported

const uint64_t twiddleCoefF64_16[32]

Double Precision Floating-point Twiddle factors Table Generation.

: Example code for Double Precision Floating-point Twiddle factors Generation:

: where N = 16, PI = 3.14159265358979
: Cos and Sin values are in interleaved fashion

const uint64_t twiddleCoefF64_32[64]

: Example code for Double Precision Floating-point Twiddle factors Generation:

: where N = 32, PI = 3.14159265358979
: Cos and Sin values are in interleaved fashion

const uint64_t twiddleCoefF64_64[128]

: Example code for Double Precision Floating-point Twiddle factors Generation:

: where N = 64, PI = 3.14159265358979
: Cos and Sin values are in interleaved fashion

const uint64_t twiddleCoefF64_128[256]

: Example code for Double Precision Floating-point Twiddle factors Generation:

: where N = 128, PI = 3.14159265358979
: Cos and Sin values are in interleaved fashion

const uint64_t twiddleCoefF64_256[512]

: Example code for Double Precision Floating-point Twiddle factors Generation:

: where N = 256, PI = 3.14159265358979
: Cos and Sin values are in interleaved fashion

const uint64_t twiddleCoefF64_512[1024]

: Example code for Double Precision Floating-point Twiddle factors Generation:

: where N = 512, PI = 3.14159265358979
: Cos and Sin values are in interleaved fashion

const uint64_t twiddleCoefF64_1024[2048]

: Example code for Double Precision Floating-point Twiddle factors Generation:

: where N = 1024, PI = 3.14159265358979
: Cos and Sin values are in interleaved fashion

const uint64_t twiddleCoefF64_2048[4096]

: Example code for Double Precision Floating-point Twiddle factors Generation:

: where N = 2048, PI = 3.14159265358979
: Cos and Sin values are in interleaved fashion

const uint64_t twiddleCoefF64_4096[8192]

: Example code for Double Precision Floating-point Twiddle factors Generation:

: where N = 4096, PI = 3.14159265358979
: Cos and Sin values are in interleaved fashion

const float32_t twiddleCoef_16[32]

: Example code for Floating-point Twiddle factors Generation:

: where N = 16, PI = 3.14159265358979
: Cos and Sin values are in interleaved fashion

const float32_t twiddleCoef_32[64]

: Example code for Floating-point Twiddle factors Generation:

: where N = 32, PI = 3.14159265358979
: Cos and Sin values are in interleaved fashion

const float32_t twiddleCoef_64[128]

: Example code for Floating-point Twiddle factors Generation:

: where N = 64, PI = 3.14159265358979
: Cos and Sin values are in interleaved fashion

const float32_t twiddleCoef_128[256]

: Example code for Floating-point Twiddle factors Generation:

: where N = 128, PI = 3.14159265358979
: Cos and Sin values are in interleaved fashion

const float32_t twiddleCoef_256[512]

: Example code for Floating-point Twiddle factors Generation:

: where N = 256, PI = 3.14159265358979
: Cos and Sin values are in interleaved fashion

const float32_t twiddleCoef_512[1024]

: Example code for Floating-point Twiddle factors Generation:

: where N = 512, PI = 3.14159265358979
: Cos and Sin values are in interleaved fashion

const float32_t twiddleCoef_1024[2048]

: Example code for Floating-point Twiddle factors Generation:

: where N = 1024, PI = 3.14159265358979
: Cos and Sin values are in interleaved fashion

const float32_t twiddleCoef_2048[4096]

: Example code for Floating-point Twiddle factors Generation:

: where N = 2048, PI = 3.14159265358979
: Cos and Sin values are in interleaved fashion

const float32_t twiddleCoef_4096[8192]

: Example code for Floating-point Twiddle factors Generation:

: where N = 4096, PI = 3.14159265358979
: Cos and Sin values are in interleaved fashion

const q31_t twiddleCoef_16_q31[24]

Q31 Twiddle factors Table.

: Example code for Q31 Twiddle factors Generation::

: where N = 16, PI = 3.14159265358979
: Cos and Sin values are interleaved fashion
: Convert Floating point to Q31(Fixed point 1.31): round(twiddleCoefQ31(i) * pow(2, 31))

const q31_t twiddleCoef_32_q31[48]

: Example code for Q31 Twiddle factors Generation::

: where N = 32, PI = 3.14159265358979
: Cos and Sin values are interleaved fashion
: Convert Floating point to Q31(Fixed point 1.31): round(twiddleCoefQ31(i) * pow(2, 31))

const q31_t twiddleCoef_64_q31[96]

: Example code for Q31 Twiddle factors Generation::

: where N = 64, PI = 3.14159265358979
: Cos and Sin values are interleaved fashion
: Convert Floating point to Q31(Fixed point 1.31): round(twiddleCoefQ31(i) * pow(2, 31))

const q31_t twiddleCoef_128_q31[192]

: Example code for Q31 Twiddle factors Generation::

: where N = 128, PI = 3.14159265358979
: Cos and Sin values are interleaved fashion
: Convert Floating point to Q31(Fixed point 1.31): round(twiddleCoefQ31(i) * pow(2, 31))

const q31_t twiddleCoef_256_q31[384]

: Example code for Q31 Twiddle factors Generation::

: where N = 256, PI = 3.14159265358979
: Cos and Sin values are interleaved fashion
: Convert Floating point to Q31(Fixed point 1.31): round(twiddleCoefQ31(i) * pow(2, 31))

const q31_t twiddleCoef_512_q31[768]

: Example code for Q31 Twiddle factors Generation::

: where N = 512, PI = 3.14159265358979
: Cos and Sin values are interleaved fashion
: Convert Floating point to Q31(Fixed point 1.31): round(twiddleCoefQ31(i) * pow(2, 31))

const q31_t twiddleCoef_1024_q31[1536]

: Example code for Q31 Twiddle factors Generation::

: where N = 1024, PI = 3.14159265358979
: Cos and Sin values are interleaved fashion
: Convert Floating point to Q31(Fixed point 1.31): round(twiddleCoefQ31(i) * pow(2, 31))

const q31_t twiddleCoef_2048_q31[3072]

: Example code for Q31 Twiddle factors Generation::

: where N = 2048, PI = 3.14159265358979
: Cos and Sin values are interleaved fashion
: Convert Floating point to Q31(Fixed point 1.31): round(twiddleCoefQ31(i) * pow(2, 31))

const q31_t twiddleCoef_4096_q31[6144]

: Example code for Q31 Twiddle factors Generation::

: where N = 4096, PI = 3.14159265358979
: Cos and Sin values are interleaved fashion
: Convert Floating point to Q31(Fixed point 1.31): round(twiddleCoefQ31(i) * pow(2, 31))

const q15_t twiddleCoef_16_q15[24]

q15 Twiddle factors Table

: Example code for q15 Twiddle factors Generation::

: where N = 16, PI = 3.14159265358979
: Cos and Sin values are interleaved fashion
: Convert Floating point to q15(Fixed point 1.15): round(twiddleCoefq15(i) * pow(2, 15))

const q15_t twiddleCoef_32_q15[48]

: Example code for q15 Twiddle factors Generation::

: where N = 32, PI = 3.14159265358979
: Cos and Sin values are interleaved fashion
: Convert Floating point to q15(Fixed point 1.15): round(twiddleCoefq15(i) * pow(2, 15))

const q15_t twiddleCoef_64_q15[96]

: Example code for q15 Twiddle factors Generation::

: where N = 64, PI = 3.14159265358979
: Cos and Sin values are interleaved fashion
: Convert Floating point to q15(Fixed point 1.15): round(twiddleCoefq15(i) * pow(2, 15))

const q15_t twiddleCoef_128_q15[192]

: Example code for q15 Twiddle factors Generation::

: where N = 128, PI = 3.14159265358979
: Cos and Sin values are interleaved fashion
: Convert Floating point to q15(Fixed point 1.15): round(twiddleCoefq15(i) * pow(2, 15))

const q15_t twiddleCoef_256_q15[384]

: Example code for q15 Twiddle factors Generation::

: where N = 256, PI = 3.14159265358979
: Cos and Sin values are interleaved fashion
: Convert Floating point to q15(Fixed point 1.15): round(twiddleCoefq15(i) * pow(2, 15))

const q15_t twiddleCoef_512_q15[768]

: Example code for q15 Twiddle factors Generation::

: where N = 512, PI = 3.14159265358979
: Cos and Sin values are interleaved fashion
: Convert Floating point to q15(Fixed point 1.15): round(twiddleCoefq15(i) * pow(2, 15))

const q15_t twiddleCoef_1024_q15[1536]

: Example code for q15 Twiddle factors Generation::

: where N = 1024, PI = 3.14159265358979
: Cos and Sin values are interleaved fashion
: Convert Floating point to q15(Fixed point 1.15): round(twiddleCoefq15(i) * pow(2, 15))

const q15_t twiddleCoef_2048_q15[3072]

: Example code for q15 Twiddle factors Generation::

: where N = 2048, PI = 3.14159265358979
: Cos and Sin values are interleaved fashion
: Convert Floating point to q15(Fixed point 1.15): round(twiddleCoefq15(i) * pow(2, 15))

const q15_t twiddleCoef_4096_q15[6144]

: Example code for q15 Twiddle factors Generation::

: where N = 4096, PI = 3.14159265358979
: Cos and Sin values are interleaved fashion
: Convert Floating point to q15(Fixed point 1.15): round(twiddleCoefq15(i) * pow(2, 15))

const float16_t twiddleCoefF16_16[32]

Floating-point Twiddle factors Table Generation.

: Example code for Floating-point Twiddle factors Generation:

: where N = 16 and PI = 3.14159265358979
: Cos and Sin values are in interleaved fashion

const float16_t twiddleCoefF16_32[64]

: Example code for Floating-point Twiddle factors Generation:

: where N = 32 and PI = 3.14159265358979
: Cos and Sin values are in interleaved fashion

const float16_t twiddleCoefF16_64[128]

: Example code for Floating-point Twiddle factors Generation:

: where N = 64 and PI = 3.14159265358979
: Cos and Sin values are in interleaved fashion

const float16_t twiddleCoefF16_128[256]

: Example code for Floating-point Twiddle factors Generation:

: where N = 128 and PI = 3.14159265358979
: Cos and Sin values are in interleaved fashion

const float16_t twiddleCoefF16_256[512]

: Example code for Floating-point Twiddle factors Generation:

: where N = 256 and PI = 3.14159265358979
: Cos and Sin values are in interleaved fashion

const float16_t twiddleCoefF16_512[1024]

: Example code for Floating-point Twiddle factors Generation:

: where N = 512 and PI = 3.14159265358979
: Cos and Sin values are in interleaved fashion

const float16_t twiddleCoefF16_1024[2048]

: Example code for Floating-point Twiddle factors Generation:

: where N = 1024 and PI = 3.14159265358979
: Cos and Sin values are in interleaved fashion

const float16_t twiddleCoefF16_2048[4096]

: Example code for Floating-point Twiddle factors Generation:

: where N = 2048 and PI = 3.14159265358979
: Cos and Sin values are in interleaved fashion

const float16_t twiddleCoefF16_4096[8192]

: Example code for Floating-point Twiddle factors Generation:

: where N = 4096 and PI = 3.14159265358979
: Cos and Sin values are in interleaved fashion

const float16_t twiddleCoefF16_rfft_32[32]

: Example code for Floating-point RFFT Twiddle factors Generation:

: Real and Imag values are in interleaved fashion

const float16_t twiddleCoefF16_rfft_64[64]

const float16_t twiddleCoefF16_rfft_128[128]

const float16_t twiddleCoefF16_rfft_256[256]

const float16_t twiddleCoefF16_rfft_512[512]

const float16_t twiddleCoefF16_rfft_1024[1024]

const float16_t twiddleCoefF16_rfft_2048[2048]

const float16_t twiddleCoefF16_rfft_4096[4096]