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FFmpeg/libavcodec/ppc/fft_vsx.h

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ppc: Fix the bug of fft for little endian environment on POWER7 and later Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2014-06-18 11:51:35 +03:00
#ifndef AVCODEC_PPC_FFT_VSX_H
#define AVCODEC_PPC_FFT_VSX_H
/*
* FFT transform, optimized with VSX built-in functions
* Copyright (c) 2014 Rong Yan Copyright (c) 2009 Loren Merritt
*
* This algorithm (though not any of the implementation details) is
* based on libdjbfft by D. J. Bernstein, and fft_altivec_s.S.
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#include "libavutil/cpu.h"
#include "libavutil/ppc/types_altivec.h"
#include "libavutil/ppc/util_altivec.h"
#include "libavcodec/fft.h"
#include "libavcodec/fft-internal.h"
#if HAVE_VSX
void ff_fft_calc_interleave_vsx(FFTContext *s, FFTComplex *z);
void ff_fft_calc_vsx(FFTContext *s, FFTComplex *z);
#define byte_2complex (2*sizeof(FFTComplex))
#define byte_4complex (4*sizeof(FFTComplex))
#define byte_6complex (6*sizeof(FFTComplex))
#define byte_8complex (8*sizeof(FFTComplex))
#define byte_10complex (10*sizeof(FFTComplex))
#define byte_12complex (12*sizeof(FFTComplex))
#define byte_14complex (14*sizeof(FFTComplex))
inline static void pass_vsx_interleave(FFTComplex *z, const FFTSample *wre, unsigned int n)
{
int o1 = n<<1;
int o2 = n<<2;
int o3 = o1+o2;
int i1, i2, i3;
FFTSample* out = (FFTSample*)z;
const FFTSample *wim = wre+o1;
vec_f vz0, vzo1, vzo2, vzo3;
vec_f x0, x1, x2, x3;
vec_f x4, x5, x6, x7;
vec_f x8, x9, x10, x11;
vec_f x12, x13, x14, x15;
vec_f x16, x17, x18, x19;
vec_f x20, x21, x22, x23;
vec_f vz0plus1, vzo1plus1, vzo2plus1, vzo3plus1;
vec_f y0, y1, y2, y3;
vec_f y4, y5, y8, y9;
vec_f y10, y13, y14, y15;
vec_f y16, y17, y18, y19;
vec_f y20, y21, y22, y23;
vec_f wr1, wi1, wr0, wi0;
vec_f wr2, wi2, wr3, wi3;
vec_f xmulwi0, xmulwi1, ymulwi2, ymulwi3;
n = n-2;
i1 = o1*sizeof(FFTComplex);
i2 = o2*sizeof(FFTComplex);
i3 = o3*sizeof(FFTComplex);
vzo2 = vec_ld(i2, &(out[0])); // zo2.r zo2.i z(o2+1).r z(o2+1).i
vzo2plus1 = vec_ld(i2+16, &(out[0]));
vzo3 = vec_ld(i3, &(out[0])); // zo3.r zo3.i z(o3+1).r z(o3+1).i
vzo3plus1 = vec_ld(i3+16, &(out[0]));
vz0 = vec_ld(0, &(out[0])); // z0.r z0.i z1.r z1.i
vz0plus1 = vec_ld(16, &(out[0]));
vzo1 = vec_ld(i1, &(out[0])); // zo1.r zo1.i z(o1+1).r z(o1+1).i
vzo1plus1 = vec_ld(i1+16, &(out[0]));
x0 = vec_add(vzo2, vzo3);
x1 = vec_sub(vzo2, vzo3);
y0 = vec_add(vzo2plus1, vzo3plus1);
y1 = vec_sub(vzo2plus1, vzo3plus1);
wr1 = vec_splats(wre[1]);
wi1 = vec_splats(wim[-1]);
wi2 = vec_splats(wim[-2]);
wi3 = vec_splats(wim[-3]);
wr2 = vec_splats(wre[2]);
wr3 = vec_splats(wre[3]);
x2 = vec_perm(x0, x1, vcprm(2,s2,3,s3));
x3 = vec_perm(x0, x1, vcprm(s3,3,s2,2));
y4 = vec_perm(y0, y1, vcprm(s1,1,s0,0));
y5 = vec_perm(y0, y1, vcprm(s3,3,s2,2));
y2 = vec_perm(y0, y1, vcprm(0,s0,1,s1));
y3 = vec_perm(y0, y1, vcprm(2,s2,3,s3));
ymulwi2 = vec_mul(y4, wi2);
ymulwi3 = vec_mul(y5, wi3);
x4 = vec_mul(x2, wr1);
x5 = vec_mul(x3, wi1);
y8 = vec_madd(y2, wr2, ymulwi2);
y9 = vec_msub(y2, wr2, ymulwi2);
x6 = vec_add(x4, x5);
x7 = vec_sub(x4, x5);
y13 = vec_madd(y3, wr3, ymulwi3);
y14 = vec_msub(y3, wr3, ymulwi3);
x8 = vec_perm(x6, x7, vcprm(0,1,s2,s3));
y10 = vec_perm(y8, y9, vcprm(0,1,s2,s3));
y15 = vec_perm(y13, y14, vcprm(0,1,s2,s3));
x9 = vec_perm(x0, x8, vcprm(0,1,s0,s2));
x10 = vec_perm(x1, x8, vcprm(1,0,s3,s1));
y16 = vec_perm(y10, y15, vcprm(0,2,s0,s2));
y17 = vec_perm(y10, y15, vcprm(3,1,s3,s1));
x11 = vec_add(vz0, x9);
x12 = vec_sub(vz0, x9);
x13 = vec_add(vzo1, x10);
x14 = vec_sub(vzo1, x10);
y18 = vec_add(vz0plus1, y16);
y19 = vec_sub(vz0plus1, y16);
y20 = vec_add(vzo1plus1, y17);
y21 = vec_sub(vzo1plus1, y17);
x15 = vec_perm(x13, x14, vcprm(0,s1,2,s3));
x16 = vec_perm(x13, x14, vcprm(s0,1,s2,3));
y22 = vec_perm(y20, y21, vcprm(0,s1,2,s3));
y23 = vec_perm(y20, y21, vcprm(s0,1,s2,3));
vec_st(x11, 0, &(out[0]));
vec_st(y18, 16, &(out[0]));
vec_st(x15, i1, &(out[0]));
vec_st(y22, i1+16, &(out[0]));
vec_st(x12, i2, &(out[0]));
vec_st(y19, i2+16, &(out[0]));
vec_st(x16, i3, &(out[0]));
vec_st(y23, i3+16, &(out[0]));
do {
out += 8;
wre += 4;
wim -= 4;
wr0 = vec_splats(wre[0]);
wr1 = vec_splats(wre[1]);
wi0 = vec_splats(wim[0]);
wi1 = vec_splats(wim[-1]);
wr2 = vec_splats(wre[2]);
wr3 = vec_splats(wre[3]);
wi2 = vec_splats(wim[-2]);
wi3 = vec_splats(wim[-3]);
vzo2 = vec_ld(i2, &(out[0])); // zo2.r zo2.i z(o2+1).r z(o2+1).i
vzo2plus1 = vec_ld(i2+16, &(out[0]));
vzo3 = vec_ld(i3, &(out[0])); // zo3.r zo3.i z(o3+1).r z(o3+1).i
vzo3plus1 = vec_ld(i3+16, &(out[0]));
vz0 = vec_ld(0, &(out[0])); // z0.r z0.i z1.r z1.i
vz0plus1 = vec_ld(16, &(out[0]));
vzo1 = vec_ld(i1, &(out[0])); // zo1.r zo1.i z(o1+1).r z(o1+1).i
vzo1plus1 = vec_ld(i1+16, &(out[0]));
x0 = vec_add(vzo2, vzo3);
x1 = vec_sub(vzo2, vzo3);
y0 = vec_add(vzo2plus1, vzo3plus1);
y1 = vec_sub(vzo2plus1, vzo3plus1);
x4 = vec_perm(x0, x1, vcprm(s1,1,s0,0));
x5 = vec_perm(x0, x1, vcprm(s3,3,s2,2));
x2 = vec_perm(x0, x1, vcprm(0,s0,1,s1));
x3 = vec_perm(x0, x1, vcprm(2,s2,3,s3));
y2 = vec_perm(y0, y1, vcprm(0,s0,1,s1));
y3 = vec_perm(y0, y1, vcprm(2,s2,3,s3));
xmulwi0 = vec_mul(x4, wi0);
xmulwi1 = vec_mul(x5, wi1);
y4 = vec_perm(y0, y1, vcprm(s1,1,s0,0));
y5 = vec_perm(y0, y1, vcprm(s3,3,s2,2));
x8 = vec_madd(x2, wr0, xmulwi0);
x9 = vec_msub(x2, wr0, xmulwi0);
ymulwi2 = vec_mul(y4, wi2);
ymulwi3 = vec_mul(y5, wi3);
x13 = vec_madd(x3, wr1, xmulwi1);
x14 = vec_msub(x3, wr1, xmulwi1);
y8 = vec_madd(y2, wr2, ymulwi2);
y9 = vec_msub(y2, wr2, ymulwi2);
y13 = vec_madd(y3, wr3, ymulwi3);
y14 = vec_msub(y3, wr3, ymulwi3);
x10 = vec_perm(x8, x9, vcprm(0,1,s2,s3));
x15 = vec_perm(x13, x14, vcprm(0,1,s2,s3));
y10 = vec_perm(y8, y9, vcprm(0,1,s2,s3));
y15 = vec_perm(y13, y14, vcprm(0,1,s2,s3));
x16 = vec_perm(x10, x15, vcprm(0,2,s0,s2));
x17 = vec_perm(x10, x15, vcprm(3,1,s3,s1));
y16 = vec_perm(y10, y15, vcprm(0,2,s0,s2));
y17 = vec_perm(y10, y15, vcprm(3,1,s3,s1));
x18 = vec_add(vz0, x16);
x19 = vec_sub(vz0, x16);
x20 = vec_add(vzo1, x17);
x21 = vec_sub(vzo1, x17);
y18 = vec_add(vz0plus1, y16);
y19 = vec_sub(vz0plus1, y16);
y20 = vec_add(vzo1plus1, y17);
y21 = vec_sub(vzo1plus1, y17);
x22 = vec_perm(x20, x21, vcprm(0,s1,2,s3));
x23 = vec_perm(x20, x21, vcprm(s0,1,s2,3));
y22 = vec_perm(y20, y21, vcprm(0,s1,2,s3));
y23 = vec_perm(y20, y21, vcprm(s0,1,s2,3));
vec_st(x18, 0, &(out[0]));
vec_st(y18, 16, &(out[0]));
vec_st(x22, i1, &(out[0]));
vec_st(y22, i1+16, &(out[0]));
vec_st(x19, i2, &(out[0]));
vec_st(y19, i2+16, &(out[0]));
vec_st(x23, i3, &(out[0]));
vec_st(y23, i3+16, &(out[0]));
} while (n-=2);
}
inline static void fft2_vsx_interleave(FFTComplex *z)
{
FFTSample r1, i1;
r1 = z[0].re - z[1].re;
z[0].re += z[1].re;
z[1].re = r1;
i1 = z[0].im - z[1].im;
z[0].im += z[1].im;
z[1].im = i1;
}
inline static void fft4_vsx_interleave(FFTComplex *z)
{
vec_f a, b, c, d;
float* out= (float*)z;
a = vec_ld(0, &(out[0]));
b = vec_ld(byte_2complex, &(out[0]));
c = vec_perm(a, b, vcprm(0,1,s2,s1));
d = vec_perm(a, b, vcprm(2,3,s0,s3));
a = vec_add(c, d);
b = vec_sub(c, d);
c = vec_perm(a, b, vcprm(0,1,s0,s1));
d = vec_perm(a, b, vcprm(2,3,s3,s2));
a = vec_add(c, d);
b = vec_sub(c, d);
vec_st(a, 0, &(out[0]));
vec_st(b, byte_2complex, &(out[0]));
}
inline static void fft8_vsx_interleave(FFTComplex *z)
{
vec_f vz0, vz1, vz2, vz3;
vec_f x0, x1, x2, x3;
vec_f x4, x5, x6, x7;
vec_f x8, x9, x10, x11;
vec_f x12, x13, x14, x15;
vec_f x16, x17, x18, x19;
vec_f x20, x21, x22, x23;
vec_f x24, x25, x26, x27;
vec_f x28, x29, x30, x31;
vec_f x32, x33, x34;
float* out= (float*)z;
vec_f vc1 = {sqrthalf, sqrthalf, sqrthalf, sqrthalf};
vz0 = vec_ld(0, &(out[0]));
vz1 = vec_ld(byte_2complex, &(out[0]));
vz2 = vec_ld(byte_4complex, &(out[0]));
vz3 = vec_ld(byte_6complex, &(out[0]));
x0 = vec_perm(vz0, vz1, vcprm(0,1,s2,s1));
x1 = vec_perm(vz0, vz1, vcprm(2,3,s0,s3));
x2 = vec_perm(vz2, vz3, vcprm(2,1,s0,s1));
x3 = vec_perm(vz2, vz3, vcprm(0,3,s2,s3));
x4 = vec_add(x0, x1);
x5 = vec_sub(x0, x1);
x6 = vec_add(x2, x3);
x7 = vec_sub(x2, x3);
x8 = vec_perm(x4, x5, vcprm(0,1,s0,s1));
x9 = vec_perm(x4, x5, vcprm(2,3,s3,s2));
x10 = vec_perm(x6, x7, vcprm(2,1,s2,s1));
x11 = vec_perm(x6, x7, vcprm(0,3,s0,s3));
x12 = vec_add(x8, x9);
x13 = vec_sub(x8, x9);
x14 = vec_add(x10, x11);
x15 = vec_sub(x10, x11);
x16 = vec_perm(x12, x13, vcprm(0,s0,1,s1));
x17 = vec_perm(x14, x15, vcprm(0,s0,1,s1));
x18 = vec_perm(x16, x17, vcprm(s0,s3,s2,s1));
x19 = vec_add(x16, x18); // z0.r z2.r z0.i z2.i
x20 = vec_sub(x16, x18); // z4.r z6.r z4.i z6.i
x21 = vec_perm(x12, x13, vcprm(2,s2,3,s3));
x22 = vec_perm(x14, x15, vcprm(2,3,s2,s3));
x23 = vec_perm(x14, x15, vcprm(3,2,s3,s2));
x24 = vec_add(x22, x23);
x25 = vec_sub(x22, x23);
x26 = vec_mul( vec_perm(x24, x25, vcprm(2,s2,0,s0)), vc1);
x27 = vec_add(x21, x26); // z1.r z7.r z1.i z3.i
x28 = vec_sub(x21, x26); //z5.r z3.r z5.i z7.i
x29 = vec_perm(x19, x27, vcprm(0,2,s0,s2)); // z0.r z0.i z1.r z1.i
x30 = vec_perm(x19, x27, vcprm(1,3,s1,s3)); // z2.r z2.i z7.r z3.i
x31 = vec_perm(x20, x28, vcprm(0,2,s0,s2)); // z4.r z4.i z5.r z5.i
x32 = vec_perm(x20, x28, vcprm(1,3,s1,s3)); // z6.r z6.i z3.r z7.i
x33 = vec_perm(x30, x32, vcprm(0,1,s2,3)); // z2.r z2.i z3.r z3.i
x34 = vec_perm(x30, x32, vcprm(s0,s1,2,s3)); // z6.r z6.i z7.r z7.i
vec_st(x29, 0, &(out[0]));
vec_st(x33, byte_2complex, &(out[0]));
vec_st(x31, byte_4complex, &(out[0]));
vec_st(x34, byte_6complex, &(out[0]));
}
inline static void fft16_vsx_interleave(FFTComplex *z)
{
float* out= (float*)z;
vec_f vc0 = {sqrthalf, sqrthalf, sqrthalf, sqrthalf};
vec_f vc1 = {ff_cos_16[1], ff_cos_16[1], ff_cos_16[1], ff_cos_16[1]};
vec_f vc2 = {ff_cos_16[3], ff_cos_16[3], ff_cos_16[3], ff_cos_16[3]};
vec_f vz0, vz1, vz2, vz3;
vec_f vz4, vz5, vz6, vz7;
vec_f x0, x1, x2, x3;
vec_f x4, x5, x6, x7;
vec_f x8, x9, x10, x11;
vec_f x12, x13, x14, x15;
vec_f x16, x17, x18, x19;
vec_f x20, x21, x22, x23;
vec_f x24, x25, x26, x27;
vec_f x28, x29, x30, x31;
vec_f x32, x33, x34, x35;
vec_f x36, x37, x38, x39;
vec_f x40, x41, x42, x43;
vec_f x44, x45, x46, x47;
vec_f x48, x49, x50, x51;
vec_f x52, x53, x54, x55;
vec_f x56, x57, x58, x59;
vec_f x60, x61, x62, x63;
vec_f x64, x65, x66, x67;
vec_f x68, x69, x70, x71;
vec_f x72, x73, x74, x75;
vec_f x76, x77, x78, x79;
vec_f x80, x81, x82, x83;
vec_f x84, x85, x86;
vz0 = vec_ld(0, &(out[0]));
vz1 = vec_ld(byte_2complex, &(out[0]));
vz2 = vec_ld(byte_4complex, &(out[0]));
vz3 = vec_ld(byte_6complex, &(out[0]));
vz4 = vec_ld(byte_8complex, &(out[0]));
vz5 = vec_ld(byte_10complex, &(out[0]));
vz6 = vec_ld(byte_12complex, &(out[0]));
vz7 = vec_ld(byte_14complex, &(out[0]));
x0 = vec_perm(vz0, vz1, vcprm(0,1,s2,s1));
x1 = vec_perm(vz0, vz1, vcprm(2,3,s0,s3));
x2 = vec_perm(vz2, vz3, vcprm(0,1,s0,s1));
x3 = vec_perm(vz2, vz3, vcprm(2,3,s2,s3));
x4 = vec_perm(vz4, vz5, vcprm(0,1,s2,s1));
x5 = vec_perm(vz4, vz5, vcprm(2,3,s0,s3));
x6 = vec_perm(vz6, vz7, vcprm(0,1,s2,s1));
x7 = vec_perm(vz6, vz7, vcprm(2,3,s0,s3));
x8 = vec_add(x0, x1);
x9 = vec_sub(x0, x1);
x10 = vec_add(x2, x3);
x11 = vec_sub(x2, x3);
x12 = vec_add(x4, x5);
x13 = vec_sub(x4, x5);
x14 = vec_add(x6, x7);
x15 = vec_sub(x6, x7);
x16 = vec_perm(x8, x9, vcprm(0,1,s0,s1));
x17 = vec_perm(x8, x9, vcprm(2,3,s3,s2));
x18 = vec_perm(x10, x11, vcprm(2,1,s1,s2));
x19 = vec_perm(x10, x11, vcprm(0,3,s0,s3));
x20 = vec_perm(x12, x14, vcprm(0,1,s0, s1));
x21 = vec_perm(x12, x14, vcprm(2,3,s2,s3));
x22 = vec_perm(x13, x15, vcprm(0,1,s0,s1));
x23 = vec_perm(x13, x15, vcprm(3,2,s3,s2));
x24 = vec_add(x16, x17);
x25 = vec_sub(x16, x17);
x26 = vec_add(x18, x19);
x27 = vec_sub(x18, x19);
x28 = vec_add(x20, x21);
x29 = vec_sub(x20, x21);
x30 = vec_add(x22, x23);
x31 = vec_sub(x22, x23);
x32 = vec_add(x24, x26);
x33 = vec_sub(x24, x26);
x34 = vec_perm(x32, x33, vcprm(0,1,s0,s1));
x35 = vec_perm(x28, x29, vcprm(2,1,s1,s2));
x36 = vec_perm(x28, x29, vcprm(0,3,s0,s3));
x37 = vec_add(x35, x36);
x38 = vec_sub(x35, x36);
x39 = vec_perm(x37, x38, vcprm(0,1,s1,s0));
x40 = vec_perm(x27, x38, vcprm(3,2,s2,s3));
x41 = vec_perm(x26, x37, vcprm(2,3,s3,s2));
x42 = vec_add(x40, x41);
x43 = vec_sub(x40, x41);
x44 = vec_mul(x42, vc0);
x45 = vec_mul(x43, vc0);
x46 = vec_add(x34, x39); // z0.r z0.i z4.r z4.i
x47 = vec_sub(x34, x39); // z8.r z8.i z12.r z12.i
x48 = vec_perm(x30, x31, vcprm(2,1,s1,s2));
x49 = vec_perm(x30, x31, vcprm(0,3,s3,s0));
x50 = vec_add(x48, x49);
x51 = vec_sub(x48, x49);
x52 = vec_mul(x50, vc1);
x53 = vec_mul(x50, vc2);
x54 = vec_mul(x51, vc1);
x55 = vec_mul(x51, vc2);
x56 = vec_perm(x24, x25, vcprm(2,3,s2,s3));
x57 = vec_perm(x44, x45, vcprm(0,1,s1,s0));
x58 = vec_add(x56, x57);
x59 = vec_sub(x56, x57);
x60 = vec_perm(x54, x55, vcprm(1,0,3,2));
x61 = vec_perm(x54, x55, vcprm(s1,s0,s3,s2));
x62 = vec_add(x52, x61);
x63 = vec_sub(x52, x61);
x64 = vec_add(x60, x53);
x65 = vec_sub(x60, x53);
x66 = vec_perm(x62, x64, vcprm(0,1,s3,s2));
x67 = vec_perm(x63, x65, vcprm(s0,s1,3,2));
x68 = vec_add(x58, x66); // z1.r z1.i z3.r z3.i
x69 = vec_sub(x58, x66); // z9.r z9.i z11.r z11.i
x70 = vec_add(x59, x67); // z5.r z5.i z15.r z15.i
x71 = vec_sub(x59, x67); // z13.r z13.i z7.r z7.i
x72 = vec_perm(x25, x27, vcprm(s1,s0,s2,s3));
x73 = vec_add(x25, x72);
x74 = vec_sub(x25, x72);
x75 = vec_perm(x73, x74, vcprm(0,1,s0,s1));
x76 = vec_perm(x44, x45, vcprm(3,2,s2,s3));
x77 = vec_add(x75, x76); // z2.r z2.i z6.r z6.i
x78 = vec_sub(x75, x76); // z10.r z10.i z14.r z14.i
x79 = vec_perm(x46, x68, vcprm(0,1,s0,s1)); // z0.r z0.i z1.r z1.i
x80 = vec_perm(x77, x68, vcprm(0,1,s2,s3)); // z2.r z2.i z3.r z3.i
x81 = vec_perm(x46, x70, vcprm(2,3,s0,s1)); // z4.r z4.i z5.r z5.i
x82 = vec_perm(x71, x77, vcprm(s2,s3,2,3)); // z6.r z6.i z7.r z7.i
vec_st(x79, 0, &(out[0]));
vec_st(x80, byte_2complex, &(out[0]));
vec_st(x81, byte_4complex, &(out[0]));
vec_st(x82, byte_6complex, &(out[0]));
x83 = vec_perm(x47, x69, vcprm(0,1,s0,s1)); // z8.r z8.i z9.r z9.i
x84 = vec_perm(x78, x69, vcprm(0,1,s2,s3)); // z10.r z10.i z11.r z11.i
x85 = vec_perm(x47, x71, vcprm(2,3,s0,s1)); // z12.r z12.i z13.r z13.i
x86 = vec_perm(x70, x78, vcprm(s2,s3,2,3)); // z14.r z14.i z15.r z15.i
vec_st(x83, byte_8complex, &(out[0]));
vec_st(x84, byte_10complex, &(out[0]));
vec_st(x85, byte_12complex, &(out[0]));
vec_st(x86, byte_14complex, &(out[0]));
}
inline static void fft4_vsx(FFTComplex *z)
{
vec_f a, b, c, d;
float* out= (float*)z;
a = vec_ld(0, &(out[0]));
b = vec_ld(byte_2complex, &(out[0]));
c = vec_perm(a, b, vcprm(0,1,s2,s1));
d = vec_perm(a, b, vcprm(2,3,s0,s3));
a = vec_add(c, d);
b = vec_sub(c, d);
c = vec_perm(a,b, vcprm(0,s0,1,s1));
d = vec_perm(a, b, vcprm(2,s3,3,s2));
a = vec_add(c, d);
b = vec_sub(c, d);
c = vec_perm(a, b, vcprm(0,1,s0,s1));
d = vec_perm(a, b, vcprm(2,3,s2,s3));
vec_st(c, 0, &(out[0]));
vec_st(d, byte_2complex, &(out[0]));
return;
}
inline static void fft8_vsx(FFTComplex *z)
{
vec_f vz0, vz1, vz2, vz3;
vec_f vz4, vz5, vz6, vz7, vz8;
float* out= (float*)z;
vec_f vc0 = {0.0, 0.0, 0.0, 0.0};
vec_f vc1 = {-sqrthalf, sqrthalf, sqrthalf, -sqrthalf};
vec_f vc2 = {sqrthalf, sqrthalf, sqrthalf, sqrthalf};
vz0 = vec_ld(0, &(out[0]));
vz1 = vec_ld(byte_2complex, &(out[0]));
vz2 = vec_ld(byte_4complex, &(out[0]));
vz3 = vec_ld(byte_6complex, &(out[0]));
vz6 = vec_perm(vz2, vz3, vcprm(0,s0,1,s1));
vz7 = vec_perm(vz2, vz3, vcprm(2,s2,3,s3));
vz4 = vec_perm(vz0, vz1, vcprm(0,1,s2,s1));
vz5 = vec_perm(vz0, vz1, vcprm(2,3,s0,s3));
vz2 = vec_add(vz6, vz7);
vz3 = vec_sub(vz6, vz7);
vz8 = vec_perm(vz3, vz3, vcprm(2,3,0,1));
vz0 = vec_add(vz4, vz5);
vz1 = vec_sub(vz4, vz5);
vz3 = vec_madd(vz3, vc1, vc0);
vz3 = vec_madd(vz8, vc2, vz3);
vz4 = vec_perm(vz0, vz1, vcprm(0,s0,1,s1));
vz5 = vec_perm(vz0, vz1, vcprm(2,s3,3,s2));
vz6 = vec_perm(vz2, vz3, vcprm(1,2,s3,s0));
vz7 = vec_perm(vz2, vz3, vcprm(0,3,s2,s1));
vz0 = vec_add(vz4, vz5);
vz1 = vec_sub(vz4, vz5);
vz2 = vec_add(vz6, vz7);
vz3 = vec_sub(vz6, vz7);
vz4 = vec_perm(vz0, vz1, vcprm(0,1,s0,s1));
vz5 = vec_perm(vz0, vz1, vcprm(2,3,s2,s3));
vz6 = vec_perm(vz2, vz3, vcprm(0,2,s1,s3));
vz7 = vec_perm(vz2, vz3, vcprm(1,3,s0,s2));
vz2 = vec_sub(vz4, vz6);
vz3 = vec_sub(vz5, vz7);
vz0 = vec_add(vz4, vz6);
vz1 = vec_add(vz5, vz7);
vec_st(vz0, 0, &(out[0]));
vec_st(vz1, byte_2complex, &(out[0]));
vec_st(vz2, byte_4complex, &(out[0]));
vec_st(vz3, byte_6complex, &(out[0]));
return;
}
inline static void fft16_vsx(FFTComplex *z)
{
float* out= (float*)z;
vec_f vc0 = {0.0, 0.0, 0.0, 0.0};
vec_f vc1 = {-sqrthalf, sqrthalf, sqrthalf, -sqrthalf};
vec_f vc2 = {sqrthalf, sqrthalf, sqrthalf, sqrthalf};
vec_f vc3 = {1.0, 0.92387953, sqrthalf, 0.38268343};
vec_f vc4 = {0.0, 0.38268343, sqrthalf, 0.92387953};
vec_f vc5 = {-0.0, -0.38268343, -sqrthalf, -0.92387953};
vec_f vz0, vz1, vz2, vz3;
vec_f vz4, vz5, vz6, vz7;
vec_f vz8, vz9, vz10, vz11;
vec_f vz12, vz13;
vz0 = vec_ld(byte_8complex, &(out[0]));
vz1 = vec_ld(byte_10complex, &(out[0]));
vz2 = vec_ld(byte_12complex, &(out[0]));
vz3 = vec_ld(byte_14complex, &(out[0]));
vz4 = vec_perm(vz0, vz1, vcprm(0,1,s2,s1));
vz5 = vec_perm(vz0, vz1, vcprm(2,3,s0,s3));
vz6 = vec_perm(vz2, vz3, vcprm(0,1,s2,s1));
vz7 = vec_perm(vz2, vz3, vcprm(2,3,s0,s3));
vz0 = vec_add(vz4, vz5);
vz1= vec_sub(vz4, vz5);
vz2 = vec_add(vz6, vz7);
vz3 = vec_sub(vz6, vz7);
vz4 = vec_perm(vz0, vz1, vcprm(0,s0,1,s1));
vz5 = vec_perm(vz0, vz1, vcprm(2,s3,3,s2));
vz6 = vec_perm(vz2, vz3, vcprm(0,s0,1,s1));
vz7 = vec_perm(vz2, vz3, vcprm(2,s3,3,s2));
vz0 = vec_add(vz4, vz5);
vz1 = vec_sub(vz4, vz5);
vz2 = vec_add(vz6, vz7);
vz3 = vec_sub(vz6, vz7);
vz4 = vec_perm(vz0, vz1, vcprm(0,1,s0,s1));
vz5 = vec_perm(vz0, vz1, vcprm(2,3,s2,s3));
vz6 = vec_perm(vz2, vz3, vcprm(0,1,s0,s1));
vz7 = vec_perm(vz2, vz3, vcprm(2,3,s2,s3));
vz0 = vec_ld(0, &(out[0]));
vz1 = vec_ld(byte_2complex, &(out[0]));
vz2 = vec_ld(byte_4complex, &(out[0]));
vz3 = vec_ld(byte_6complex, &(out[0]));
vz10 = vec_perm(vz2, vz3, vcprm(0,s0,1,s1));
vz11 = vec_perm(vz2, vz3, vcprm(2,s2,3,s3));
vz8 = vec_perm(vz0, vz1, vcprm(0,1,s2,s1));
vz9 = vec_perm(vz0, vz1, vcprm(2,3,s0,s3));
vz2 = vec_add(vz10, vz11);
vz3 = vec_sub(vz10, vz11);
vz12 = vec_perm(vz3, vz3, vcprm(2,3,0,1));
vz0 = vec_add(vz8, vz9);
vz1 = vec_sub(vz8, vz9);
vz3 = vec_madd(vz3, vc1, vc0);
vz3 = vec_madd(vz12, vc2, vz3);
vz8 = vec_perm(vz0, vz1, vcprm(0,s0,1,s1));
vz9 = vec_perm(vz0, vz1, vcprm(2,s3,3,s2));
vz10 = vec_perm(vz2, vz3, vcprm(1,2,s3,s0));
vz11 = vec_perm(vz2, vz3, vcprm(0,3,s2,s1));
vz0 = vec_add(vz8, vz9);
vz1 = vec_sub(vz8, vz9);
vz2 = vec_add(vz10, vz11);
vz3 = vec_sub(vz10, vz11);
vz8 = vec_perm(vz0, vz1, vcprm(0,1,s0,s1));
vz9 = vec_perm(vz0, vz1, vcprm(2,3,s2,s3));
vz10 = vec_perm(vz2, vz3, vcprm(0,2,s1,s3));
vz11 = vec_perm(vz2, vz3, vcprm(1,3,s0,s2));
vz2 = vec_sub(vz8, vz10);
vz3 = vec_sub(vz9, vz11);
vz0 = vec_add(vz8, vz10);
vz1 = vec_add(vz9, vz11);
vz8 = vec_madd(vz4, vc3, vc0);
vz9 = vec_madd(vz5, vc3, vc0);
vz10 = vec_madd(vz6, vc3, vc0);
vz11 = vec_madd(vz7, vc3, vc0);
vz8 = vec_madd(vz5, vc4, vz8);
vz9 = vec_madd(vz4, vc5, vz9);
vz10 = vec_madd(vz7, vc5, vz10);
vz11 = vec_madd(vz6, vc4, vz11);
vz12 = vec_sub(vz10, vz8);
vz10 = vec_add(vz10, vz8);
vz13 = vec_sub(vz9, vz11);
vz11 = vec_add(vz9, vz11);
vz4 = vec_sub(vz0, vz10);
vz0 = vec_add(vz0, vz10);
vz7= vec_sub(vz3, vz12);
vz3= vec_add(vz3, vz12);
vz5 = vec_sub(vz1, vz11);
vz1 = vec_add(vz1, vz11);
vz6 = vec_sub(vz2, vz13);
vz2 = vec_add(vz2, vz13);
vec_st(vz0, 0, &(out[0]));
vec_st(vz1, byte_2complex, &(out[0]));
vec_st(vz2, byte_4complex, &(out[0]));
vec_st(vz3, byte_6complex, &(out[0]));
vec_st(vz4, byte_8complex, &(out[0]));
vec_st(vz5, byte_10complex, &(out[0]));
vec_st(vz6, byte_12complex, &(out[0]));
vec_st(vz7, byte_14complex, &(out[0]));
return;
}
inline static void pass_vsx(FFTComplex * z, const FFTSample * wre, unsigned int n)
{
int o1 = n<<1;
int o2 = n<<2;
int o3 = o1+o2;
int i1, i2, i3;
FFTSample* out = (FFTSample*)z;
const FFTSample *wim = wre+o1;
vec_f v0, v1, v2, v3;
vec_f v4, v5, v6, v7;
vec_f v8, v9, v10, v11;
vec_f v12, v13;
n = n-2;
i1 = o1*sizeof(FFTComplex);
i2 = o2*sizeof(FFTComplex);
i3 = o3*sizeof(FFTComplex);
v8 = vec_ld(0, &(wre[0]));
v10 = vec_ld(0, &(wim[0]));
v9 = vec_ld(0, &(wim[-4]));
v9 = vec_perm(v9, v10, vcprm(s0,3,2,1));
v4 = vec_ld(i2, &(out[0]));
v5 = vec_ld(i2+16, &(out[0]));
v6 = vec_ld(i3, &(out[0]));
v7 = vec_ld(i3+16, &(out[0]));
v10 = vec_mul(v4, v8); // r2*wre
v11 = vec_mul(v5, v8); // i2*wre
v12 = vec_mul(v6, v8); // r3*wre
v13 = vec_mul(v7, v8); // i3*wre
v0 = vec_ld(0, &(out[0])); // r0
v3 = vec_ld(i1+16, &(out[0])); // i1
v10 = vec_madd(v5, v9, v10); // r2*wim
v11 = vec_nmsub(v4, v9, v11); // i2*wim
v12 = vec_nmsub(v7, v9, v12); // r3*wim
v13 = vec_madd(v6, v9, v13); // i3*wim
v1 = vec_ld(16, &(out[0])); // i0
v2 = vec_ld(i1, &(out[0])); // r1
v8 = vec_sub(v12, v10);
v12 = vec_add(v12, v10);
v9 = vec_sub(v11, v13);
v13 = vec_add(v11, v13);
v4 = vec_sub(v0, v12);
v0 = vec_add(v0, v12);
v7 = vec_sub(v3, v8);
v3 = vec_add(v3, v8);
vec_st(v0, 0, &(out[0])); // r0
vec_st(v3, i1+16, &(out[0])); // i1
vec_st(v4, i2, &(out[0])); // r2
vec_st(v7, i3+16, &(out[0]));// i3
v5 = vec_sub(v1, v13);
v1 = vec_add(v1, v13);
v6 = vec_sub(v2, v9);
v2 = vec_add(v2, v9);
vec_st(v1, 16, &(out[0])); // i0
vec_st(v2, i1, &(out[0])); // r1
vec_st(v5, i2+16, &(out[0])); // i2
vec_st(v6, i3, &(out[0])); // r3
do {
out += 8;
wre += 4;
wim -= 4;
v8 = vec_ld(0, &(wre[0]));
v10 = vec_ld(0, &(wim[0]));
v9 = vec_ld(0, &(wim[-4]));
v9 = vec_perm(v9, v10, vcprm(s0,3,2,1));
v4 = vec_ld(i2, &(out[0])); // r2
v5 = vec_ld(i2+16, &(out[0])); // i2
v6 = vec_ld(i3, &(out[0])); // r3
v7 = vec_ld(i3+16, &(out[0]));// i3
v10 = vec_mul(v4, v8); // r2*wre
v11 = vec_mul(v5, v8); // i2*wre
v12 = vec_mul(v6, v8); // r3*wre
v13 = vec_mul(v7, v8); // i3*wre
v0 = vec_ld(0, &(out[0])); // r0
v3 = vec_ld(i1+16, &(out[0])); // i1
v10 = vec_madd(v5, v9, v10); // r2*wim
v11 = vec_nmsub(v4, v9, v11); // i2*wim
v12 = vec_nmsub(v7, v9, v12); // r3*wim
v13 = vec_madd(v6, v9, v13); // i3*wim
v1 = vec_ld(16, &(out[0])); // i0
v2 = vec_ld(i1, &(out[0])); // r1
v8 = vec_sub(v12, v10);
v12 = vec_add(v12, v10);
v9 = vec_sub(v11, v13);
v13 = vec_add(v11, v13);
v4 = vec_sub(v0, v12);
v0 = vec_add(v0, v12);
v7 = vec_sub(v3, v8);
v3 = vec_add(v3, v8);
vec_st(v0, 0, &(out[0])); // r0
vec_st(v3, i1+16, &(out[0])); // i1
vec_st(v4, i2, &(out[0])); // r2
vec_st(v7, i3+16, &(out[0])); // i3
v5 = vec_sub(v1, v13);
v1 = vec_add(v1, v13);
v6 = vec_sub(v2, v9);
v2 = vec_add(v2, v9);
vec_st(v1, 16, &(out[0])); // i0
vec_st(v2, i1, &(out[0])); // r1
vec_st(v5, i2+16, &(out[0])); // i2
vec_st(v6, i3, &(out[0])); // r3
} while (n-=2);
}
#endif
#endif /* AVCODEC_PPC_FFT_VSX_H */
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