libavcodec/ppc/fft_altivec.c File Reference

#include "libavcodec/dsputil.h"
#include "gcc_fixes.h"
#include "dsputil_ppc.h"
#include "util_altivec.h"

Go to the source code of this file.

Functions
void	ff_fft_calc_altivec (FFTContext *s, FFTComplex *z)
	Do a complex FFT with the parameters defined in ff_fft_init().

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Function Documentation

void ff_fft_calc_altivec	(	FFTContext *	s,
		FFTComplex *	z
	)

Do a complex FFT with the parameters defined in ff_fft_init().

The input data must be permuted before with s->revtab table. No 1.0/sqrt(n) normalization is done. AltiVec-enabled This code assumes that the 'z' pointer is 16 bytes-aligned It also assumes all FFTComplex are 8 bytes-aligned pair of float The code is exactly the same as the SSE version, except that successive MUL + ADD/SUB have been merged into fused multiply-add ('vec_madd' in altivec)

Definition at line 40 of file fft_altivec.c.

Referenced by ff_fft_init().