1/* 2 * Copyright (c) 2007 Luca Barbato <lu_zero@gentoo.org> 3 * 4 * This file is part of Libav. 5 * 6 * Libav is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2.1 of the License, or (at your option) any later version. 10 * 11 * Libav is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with Libav; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 19 */ 20 21/** 22 ** @file 23 ** integer misc ops. 24 **/ 25 26#include "config.h" 27#if HAVE_ALTIVEC_H 28#include <altivec.h> 29#endif 30 31#include "libavcodec/dsputil.h" 32 33#include "dsputil_altivec.h" 34 35#include "types_altivec.h" 36 37static int ssd_int8_vs_int16_altivec(const int8_t *pix1, const int16_t *pix2, 38 int size) { 39 int i, size16; 40 vector signed char vpix1; 41 vector signed short vpix2, vdiff, vpix1l,vpix1h; 42 union { vector signed int vscore; 43 int32_t score[4]; 44 } u; 45 u.vscore = vec_splat_s32(0); 46// 47//XXX lazy way, fix it later 48 49#define vec_unaligned_load(b) \ 50 vec_perm(vec_ld(0,b),vec_ld(15,b),vec_lvsl(0, b)); 51 52 size16 = size >> 4; 53 while(size16) { 54// score += (pix1[i]-pix2[i])*(pix1[i]-pix2[i]); 55 //load pix1 and the first batch of pix2 56 57 vpix1 = vec_unaligned_load(pix1); 58 vpix2 = vec_unaligned_load(pix2); 59 pix2 += 8; 60 //unpack 61 vpix1h = vec_unpackh(vpix1); 62 vdiff = vec_sub(vpix1h, vpix2); 63 vpix1l = vec_unpackl(vpix1); 64 // load another batch from pix2 65 vpix2 = vec_unaligned_load(pix2); 66 u.vscore = vec_msum(vdiff, vdiff, u.vscore); 67 vdiff = vec_sub(vpix1l, vpix2); 68 u.vscore = vec_msum(vdiff, vdiff, u.vscore); 69 pix1 += 16; 70 pix2 += 8; 71 size16--; 72 } 73 u.vscore = vec_sums(u.vscore, vec_splat_s32(0)); 74 75 size %= 16; 76 for (i = 0; i < size; i++) { 77 u.score[3] += (pix1[i]-pix2[i])*(pix1[i]-pix2[i]); 78 } 79 return u.score[3]; 80} 81 82static int32_t scalarproduct_int16_altivec(const int16_t * v1, const int16_t * v2, int order, const int shift) 83{ 84 int i; 85 LOAD_ZERO; 86 register vec_s16 vec1, *pv; 87 register vec_s32 res = vec_splat_s32(0), t; 88 register vec_u32 shifts; 89 int32_t ires; 90 91 shifts = zero_u32v; 92 if(shift & 0x10) shifts = vec_add(shifts, vec_sl(vec_splat_u32(0x08), vec_splat_u32(0x1))); 93 if(shift & 0x08) shifts = vec_add(shifts, vec_splat_u32(0x08)); 94 if(shift & 0x04) shifts = vec_add(shifts, vec_splat_u32(0x04)); 95 if(shift & 0x02) shifts = vec_add(shifts, vec_splat_u32(0x02)); 96 if(shift & 0x01) shifts = vec_add(shifts, vec_splat_u32(0x01)); 97 98 for(i = 0; i < order; i += 8){ 99 pv = (vec_s16*)v1; 100 vec1 = vec_perm(pv[0], pv[1], vec_lvsl(0, v1)); 101 t = vec_msum(vec1, vec_ld(0, v2), zero_s32v); 102 t = vec_sr(t, shifts); 103 res = vec_sums(t, res); 104 v1 += 8; 105 v2 += 8; 106 } 107 res = vec_splat(res, 3); 108 vec_ste(res, 0, &ires); 109 return ires; 110} 111 112static int32_t scalarproduct_and_madd_int16_altivec(int16_t *v1, const int16_t *v2, const int16_t *v3, int order, int mul) 113{ 114 LOAD_ZERO; 115 vec_s16 *pv1 = (vec_s16*)v1; 116 vec_s16 *pv2 = (vec_s16*)v2; 117 vec_s16 *pv3 = (vec_s16*)v3; 118 register vec_s16 muls = {mul,mul,mul,mul,mul,mul,mul,mul}; 119 register vec_s16 t0, t1, i0, i1; 120 register vec_s16 i2 = pv2[0], i3 = pv3[0]; 121 register vec_s32 res = zero_s32v; 122 register vec_u8 align = vec_lvsl(0, v2); 123 int32_t ires; 124 order >>= 4; 125 do { 126 t0 = vec_perm(i2, pv2[1], align); 127 i2 = pv2[2]; 128 t1 = vec_perm(pv2[1], i2, align); 129 i0 = pv1[0]; 130 i1 = pv1[1]; 131 res = vec_msum(t0, i0, res); 132 res = vec_msum(t1, i1, res); 133 t0 = vec_perm(i3, pv3[1], align); 134 i3 = pv3[2]; 135 t1 = vec_perm(pv3[1], i3, align); 136 pv1[0] = vec_mladd(t0, muls, i0); 137 pv1[1] = vec_mladd(t1, muls, i1); 138 pv1 += 2; 139 pv2 += 2; 140 pv3 += 2; 141 } while(--order); 142 res = vec_splat(vec_sums(res, zero_s32v), 3); 143 vec_ste(res, 0, &ires); 144 return ires; 145} 146 147void int_init_altivec(DSPContext* c, AVCodecContext *avctx) 148{ 149 c->ssd_int8_vs_int16 = ssd_int8_vs_int16_altivec; 150 c->scalarproduct_int16 = scalarproduct_int16_altivec; 151 c->scalarproduct_and_madd_int16 = scalarproduct_and_madd_int16_altivec; 152} 153