diff options
Diffstat (limited to 'src/libffmpeg/libavcodec/ppc/fft_altivec.c')
| -rw-r--r-- | src/libffmpeg/libavcodec/ppc/fft_altivec.c | 166 |
1 files changed, 0 insertions, 166 deletions
diff --git a/src/libffmpeg/libavcodec/ppc/fft_altivec.c b/src/libffmpeg/libavcodec/ppc/fft_altivec.c deleted file mode 100644 index 384a774ff..000000000 --- a/src/libffmpeg/libavcodec/ppc/fft_altivec.c +++ /dev/null @@ -1,166 +0,0 @@ -/* - * FFT/IFFT transforms - * AltiVec-enabled - * Copyright (c) 2003 Romain Dolbeau <romain@dolbeau.org> - * Based on code Copyright (c) 2002 Fabrice Bellard. - * - * 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 "../dsputil.h" - -#include "gcc_fixes.h" - -#include "dsputil_altivec.h" - -/* - those three macros are from libavcodec/fft.c - and are required for the reference C code -*/ -/* butter fly op */ -#define BF(pre, pim, qre, qim, pre1, pim1, qre1, qim1) \ -{\ - FFTSample ax, ay, bx, by;\ - bx=pre1;\ - by=pim1;\ - ax=qre1;\ - ay=qim1;\ - pre = (bx + ax);\ - pim = (by + ay);\ - qre = (bx - ax);\ - qim = (by - ay);\ -} -#define MUL16(a,b) ((a) * (b)) -#define CMUL(pre, pim, are, aim, bre, bim) \ -{\ - pre = (MUL16(are, bre) - MUL16(aim, bim));\ - pim = (MUL16(are, bim) + MUL16(bre, aim));\ -} - - -/** - * 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) - */ -void ff_fft_calc_altivec(FFTContext *s, FFTComplex *z) -{ -POWERPC_PERF_DECLARE(altivec_fft_num, s->nbits >= 6); - register const vector float vczero = (const vector float)vec_splat_u32(0.); - - int ln = s->nbits; - int j, np, np2; - int nblocks, nloops; - register FFTComplex *p, *q; - FFTComplex *cptr, *cptr1; - int k; - -POWERPC_PERF_START_COUNT(altivec_fft_num, s->nbits >= 6); - - np = 1 << ln; - - { - vector float *r, a, b, a1, c1, c2; - - r = (vector float *)&z[0]; - - c1 = vcii(p,p,n,n); - - if (s->inverse) - { - c2 = vcii(p,p,n,p); - } - else - { - c2 = vcii(p,p,p,n); - } - - j = (np >> 2); - do { - a = vec_ld(0, r); - a1 = vec_ld(sizeof(vector float), r); - - b = vec_perm(a,a,vcprmle(1,0,3,2)); - a = vec_madd(a,c1,b); - /* do the pass 0 butterfly */ - - b = vec_perm(a1,a1,vcprmle(1,0,3,2)); - b = vec_madd(a1,c1,b); - /* do the pass 0 butterfly */ - - /* multiply third by -i */ - b = vec_perm(b,b,vcprmle(2,3,1,0)); - - /* do the pass 1 butterfly */ - vec_st(vec_madd(b,c2,a), 0, r); - vec_st(vec_nmsub(b,c2,a), sizeof(vector float), r); - - r += 2; - } while (--j != 0); - } - /* pass 2 .. ln-1 */ - - nblocks = np >> 3; - nloops = 1 << 2; - np2 = np >> 1; - - cptr1 = s->exptab1; - do { - p = z; - q = z + nloops; - j = nblocks; - do { - cptr = cptr1; - k = nloops >> 1; - do { - vector float a,b,c,t1; - - a = vec_ld(0, (float*)p); - b = vec_ld(0, (float*)q); - - /* complex mul */ - c = vec_ld(0, (float*)cptr); - /* cre*re cim*re */ - t1 = vec_madd(c, vec_perm(b,b,vcprmle(2,2,0,0)),vczero); - c = vec_ld(sizeof(vector float), (float*)cptr); - /* -cim*im cre*im */ - b = vec_madd(c, vec_perm(b,b,vcprmle(3,3,1,1)),t1); - - /* butterfly */ - vec_st(vec_add(a,b), 0, (float*)p); - vec_st(vec_sub(a,b), 0, (float*)q); - - p += 2; - q += 2; - cptr += 4; - } while (--k); - - p += nloops; - q += nloops; - } while (--j); - cptr1 += nloops * 2; - nblocks = nblocks >> 1; - nloops = nloops << 1; - } while (nblocks != 0); - -POWERPC_PERF_STOP_COUNT(altivec_fft_num, s->nbits >= 6); -} |