ffmpeg / libavcodec / ppc / int_altivec.c @ b3858964
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/*


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* Copyright (c) 2007 Luca Barbato <lu_zero@gentoo.org>

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*

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* This file is part of FFmpeg.

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*

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* FFmpeg is free software; you can redistribute it and/or

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* modify it under the terms of the GNU Lesser General Public

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* License as published by the Free Software Foundation; either

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* version 2.1 of the License, or (at your option) any later version.

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*

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* FFmpeg is distributed in the hope that it will be useful,

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* but WITHOUT ANY WARRANTY; without even the implied warranty of

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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

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* Lesser General Public License for more details.

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*

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* You should have received a copy of the GNU Lesser General Public

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* License along with FFmpeg; if not, write to the Free Software

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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 021101301 USA

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*/

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/**

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** @file

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** integer misc ops.

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**/

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#include "config.h" 
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#if HAVE_ALTIVEC_H

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#include <altivec.h> 
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#endif

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#include "libavcodec/dsputil.h" 
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#include "dsputil_altivec.h" 
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#include "types_altivec.h" 
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static int ssd_int8_vs_int16_altivec(const int8_t *pix1, const int16_t *pix2, 
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int size) {

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int i, size16;

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vector signed char vpix1; 
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vector signed short vpix2, vdiff, vpix1l,vpix1h; 
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union { vector signed int vscore; 
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int32_t score[4];

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} u; 
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u.vscore = vec_splat_s32(0);

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//

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//XXX lazy way, fix it later

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#define vec_unaligned_load(b) \

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vec_perm(vec_ld(0,b),vec_ld(15,b),vec_lvsl(0, b)); 
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size16 = size >> 4;

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while(size16) {

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// score += (pix1[i]pix2[i])*(pix1[i]pix2[i]);

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//load pix1 and the first batch of pix2

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vpix1 = vec_unaligned_load(pix1); 
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vpix2 = vec_unaligned_load(pix2); 
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pix2 += 8;

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//unpack

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vpix1h = vec_unpackh(vpix1); 
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vdiff = vec_sub(vpix1h, vpix2); 
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vpix1l = vec_unpackl(vpix1); 
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// load another batch from pix2

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vpix2 = vec_unaligned_load(pix2); 
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u.vscore = vec_msum(vdiff, vdiff, u.vscore); 
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vdiff = vec_sub(vpix1l, vpix2); 
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u.vscore = vec_msum(vdiff, vdiff, u.vscore); 
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pix1 += 16;

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pix2 += 8;

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size16; 
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} 
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u.vscore = vec_sums(u.vscore, vec_splat_s32(0));

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size %= 16;

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for (i = 0; i < size; i++) { 
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u.score[3] += (pix1[i]pix2[i])*(pix1[i]pix2[i]);

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} 
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return u.score[3]; 
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} 
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static int32_t scalarproduct_int16_altivec(const int16_t * v1, const int16_t * v2, int order, const int shift) 
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{ 
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int i;

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LOAD_ZERO; 
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register vec_s16 vec1, *pv;

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register vec_s32 res = vec_splat_s32(0), t; 
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register vec_u32 shifts;

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int32_t ires; 
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shifts = zero_u32v; 
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if(shift & 0x10) shifts = vec_add(shifts, vec_sl(vec_splat_u32(0x08), vec_splat_u32(0x1))); 
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if(shift & 0x08) shifts = vec_add(shifts, vec_splat_u32(0x08)); 
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if(shift & 0x04) shifts = vec_add(shifts, vec_splat_u32(0x04)); 
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if(shift & 0x02) shifts = vec_add(shifts, vec_splat_u32(0x02)); 
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if(shift & 0x01) shifts = vec_add(shifts, vec_splat_u32(0x01)); 
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for(i = 0; i < order; i += 8){ 
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pv = (vec_s16*)v1; 
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vec1 = vec_perm(pv[0], pv[1], vec_lvsl(0, v1)); 
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t = vec_msum(vec1, vec_ld(0, v2), zero_s32v);

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t = vec_sr(t, shifts); 
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res = vec_sums(t, res); 
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v1 += 8;

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v2 += 8;

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} 
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res = vec_splat(res, 3);

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vec_ste(res, 0, &ires);

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return ires;

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} 
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static int32_t scalarproduct_and_madd_int16_altivec(int16_t *v1, const int16_t *v2, const int16_t *v3, int order, int mul) 
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{ 
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LOAD_ZERO; 
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vec_s16 *pv1 = (vec_s16*)v1; 
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vec_s16 *pv2 = (vec_s16*)v2; 
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vec_s16 *pv3 = (vec_s16*)v3; 
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register vec_s16 muls = {mul,mul,mul,mul,mul,mul,mul,mul};

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register vec_s16 t0, t1, i0, i1;

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register vec_s16 i2 = pv2[0], i3 = pv3[0]; 
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register vec_s32 res = zero_s32v;

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register vec_u8 align = vec_lvsl(0, v2); 
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int32_t ires; 
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order >>= 4;

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do {

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t0 = vec_perm(i2, pv2[1], align);

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i2 = pv2[2];

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t1 = vec_perm(pv2[1], i2, align);

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i0 = pv1[0];

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i1 = pv1[1];

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res = vec_msum(t0, i0, res); 
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res = vec_msum(t1, i1, res); 
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t0 = vec_perm(i3, pv3[1], align);

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i3 = pv3[2];

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t1 = vec_perm(pv3[1], i3, align);

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pv1[0] = vec_mladd(t0, muls, i0);

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pv1[1] = vec_mladd(t1, muls, i1);

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pv1 += 2;

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pv2 += 2;

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pv3 += 2;

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} while(order);

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res = vec_splat(vec_sums(res, zero_s32v), 3);

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vec_ste(res, 0, &ires);

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return ires;

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} 
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void int_init_altivec(DSPContext* c, AVCodecContext *avctx)

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{ 
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c>ssd_int8_vs_int16 = ssd_int8_vs_int16_altivec; 
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c>scalarproduct_int16 = scalarproduct_int16_altivec; 
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c>scalarproduct_and_madd_int16 = scalarproduct_and_madd_int16_altivec; 
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} 