NE10_fft_generic_int32.cpp File Reference

#include "NE10_types.h"
#include "NE10_macros.h"
#include "NE10_fft.h"
#include "NE10_fft_generic_int32.h"

Go to the source code of this file.

Functions
template<int RADIX, bool is_first_stage, bool is_inverse, bool is_scaled>
void	ne10_radix_butterfly_int32_c (ne10_fft_cpx_int32_t *Fout, const ne10_fft_cpx_int32_t *Fin, const ne10_fft_cpx_int32_t *twiddles, const ne10_int32_t fstride, const ne10_int32_t out_step, const ne10_int32_t nfft)
	Generic butterfly function for 32-bit fixed point. More...
template<bool is_inverse, bool is_scaled>
void	ne10_mixed_radix_generic_butterfly_int32_impl_c (ne10_fft_cpx_int32_t *Fout, const ne10_fft_cpx_int32_t *Fin, const ne10_int32_t *factors, const ne10_fft_cpx_int32_t *twiddles, ne10_fft_cpx_int32_t *buffer)
	Generic FFT function for 32-bit fixed point. More...
void	ne10_mixed_radix_generic_butterfly_int32_c (ne10_fft_cpx_int32_t *Fout, const ne10_fft_cpx_int32_t *Fin, const ne10_int32_t *factors, const ne10_fft_cpx_int32_t *twiddles, ne10_fft_cpx_int32_t *buffer, const ne10_int32_t is_scaled)
	Generic (forward) FFT function for 32-bit fixed point. More...
void	ne10_mixed_radix_generic_butterfly_inverse_int32_c (ne10_fft_cpx_int32_t *Fout, const ne10_fft_cpx_int32_t *Fin, const ne10_int32_t *factors, const ne10_fft_cpx_int32_t *twiddles, ne10_fft_cpx_int32_t *buffer, const ne10_int32_t is_scaled)
	Generic IFFT function for 32-bit fixed point. More...

Function Documentation

void ne10_mixed_radix_generic_butterfly_int32_c	(	ne10_fft_cpx_int32_t *	Fout,
		const ne10_fft_cpx_int32_t *	Fin,
		const ne10_int32_t *	factors,
		const ne10_fft_cpx_int32_t *	twiddles,
		ne10_fft_cpx_int32_t *	buffer,
		const ne10_int32_t	is_scaled
	)

Generic (forward) FFT function for 32-bit fixed point.

Parameters

[out]	Fout	Pointing to output buffer.
[in]	Fin	Pointing to input buffer.
[in]	factors	Pointing to factors buffer.
[in]	twiddles	Pointing to twiddles buffer.
[in]	buffer	Pointing to temp buffer so that Fin is not polluted.
[in]	is_scaled	Whether output is scaled by size of FFT.

Definition at line 343 of file NE10_fft_generic_int32.cpp.

template<bool is_inverse, bool is_scaled>

void ne10_mixed_radix_generic_butterfly_int32_impl_c ( ne10_fft_cpx_int32_t *  Fout, const ne10_fft_cpx_int32_t *  Fin, const ne10_int32_t *  factors, const ne10_fft_cpx_int32_t *  twiddles, ne10_fft_cpx_int32_t *  buffer  )

inline

Generic FFT function for 32-bit fixed point.

Template Parameters

is_inverse	Whether it is the inverse (backward) FFT.
is_scaled	Whether output is scaled by size of FFT.

Parameters

[out]	Fout	Pointing to output buffer.
[in]	Fin	Pointing to input buffer.
[in]	factors	Pointing to factors buffer.
[in]	twiddles	Pointing to twiddles buffer.
[in]	buffer	Pointing to temp buffer so that Fin is not polluted.

Definition at line 235 of file NE10_fft_generic_int32.cpp.

void ne10_mixed_radix_generic_butterfly_inverse_int32_c	(	ne10_fft_cpx_int32_t *	Fout,
		const ne10_fft_cpx_int32_t *	Fin,
		const ne10_int32_t *	factors,
		const ne10_fft_cpx_int32_t *	twiddles,
		ne10_fft_cpx_int32_t *	buffer,
		const ne10_int32_t	is_scaled
	)

Generic IFFT function for 32-bit fixed point.

Parameters

[out]	Fout	Pointing to output buffer.
[in]	Fin	Pointing to input buffer.
[in]	factors	Pointing to factors buffer.
[in]	twiddles	Pointing to twiddles buffer.
[in]	buffer	Pointing to temp buffer so that Fin is not polluted.
[in]	is_scaled	Whether output is scaled by size of FFT.

Definition at line 374 of file NE10_fft_generic_int32.cpp.

template<int RADIX, bool is_first_stage, bool is_inverse, bool is_scaled>

void ne10_radix_butterfly_int32_c ( ne10_fft_cpx_int32_t *  Fout, const ne10_fft_cpx_int32_t *  Fin, const ne10_fft_cpx_int32_t *  twiddles, const ne10_int32_t  fstride, const ne10_int32_t  out_step, const ne10_int32_t  nfft  )

inline

Generic butterfly function for 32-bit fixed point.

Template Parameters

RADIX	Radix of this stage. One among {2, 3, 4, 5 }
is_first_stage	Whether this stags is the first. If it is, multiplication with twiddles is optimizied because all twiddles are .
is_inverse	Whether it is the inverse (backward) FFT.
is_scaled	Whether output of this stage is scaled. For fixed-point, output is scaled by RADIX during each stage.

Parameters

[out]	Fout	Pointing to output buffer.
[in]	Fin	Pointing to input buffer.
[in]	twiddles	Pointint to twiddles buffer. If is_first_stage is set true, twiddles will be ignored.
[in]	fstride	Number of butterfly groups.
[in]	out_step	Step between output data.
[in]	nfft	Size of the input array.

Definition at line 69 of file NE10_fft_generic_int32.cpp.