| /* |
| * Copyright (c) 2007 Luca Barbato <lu_zero@gentoo.org> |
| * |
| * 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 |
| */ |
| |
| /** |
| ** @file libavcodec/ppc/int_altivec.c |
| ** integer misc ops. |
| **/ |
| |
| #include "libavcodec/dsputil.h" |
| |
| #include "gcc_fixes.h" |
| |
| #include "dsputil_altivec.h" |
| |
| #include "types_altivec.h" |
| |
| static int ssd_int8_vs_int16_altivec(const int8_t *pix1, const int16_t *pix2, |
| int size) { |
| int i, size16; |
| vector signed char vpix1; |
| vector signed short vpix2, vdiff, vpix1l,vpix1h; |
| union { vector signed int vscore; |
| int32_t score[4]; |
| } u; |
| u.vscore = vec_splat_s32(0); |
| // |
| //XXX lazy way, fix it later |
| |
| #define vec_unaligned_load(b) \ |
| vec_perm(vec_ld(0,b),vec_ld(15,b),vec_lvsl(0, b)); |
| |
| size16 = size >> 4; |
| while(size16) { |
| // score += (pix1[i]-pix2[i])*(pix1[i]-pix2[i]); |
| //load pix1 and the first batch of pix2 |
| |
| vpix1 = vec_unaligned_load(pix1); |
| vpix2 = vec_unaligned_load(pix2); |
| pix2 += 8; |
| //unpack |
| vpix1h = vec_unpackh(vpix1); |
| vdiff = vec_sub(vpix1h, vpix2); |
| vpix1l = vec_unpackl(vpix1); |
| // load another batch from pix2 |
| vpix2 = vec_unaligned_load(pix2); |
| u.vscore = vec_msum(vdiff, vdiff, u.vscore); |
| vdiff = vec_sub(vpix1l, vpix2); |
| u.vscore = vec_msum(vdiff, vdiff, u.vscore); |
| pix1 += 16; |
| pix2 += 8; |
| size16--; |
| } |
| u.vscore = vec_sums(u.vscore, vec_splat_s32(0)); |
| |
| size %= 16; |
| for (i = 0; i < size; i++) { |
| u.score[3] += (pix1[i]-pix2[i])*(pix1[i]-pix2[i]); |
| } |
| return u.score[3]; |
| } |
| |
| static void add_int16_altivec(int16_t * v1, int16_t * v2, int order) |
| { |
| int i; |
| register vec_s16 vec, *pv; |
| |
| for(i = 0; i < order; i += 8){ |
| pv = (vec_s16*)v2; |
| vec = vec_perm(pv[0], pv[1], vec_lvsl(0, v2)); |
| vec_st(vec_add(vec_ld(0, v1), vec), 0, v1); |
| v1 += 8; |
| v2 += 8; |
| } |
| } |
| |
| static void sub_int16_altivec(int16_t * v1, int16_t * v2, int order) |
| { |
| int i; |
| register vec_s16 vec, *pv; |
| |
| for(i = 0; i < order; i += 8){ |
| pv = (vec_s16*)v2; |
| vec = vec_perm(pv[0], pv[1], vec_lvsl(0, v2)); |
| vec_st(vec_sub(vec_ld(0, v1), vec), 0, v1); |
| v1 += 8; |
| v2 += 8; |
| } |
| } |
| |
| static int32_t scalarproduct_int16_altivec(int16_t * v1, int16_t * v2, int order, const int shift) |
| { |
| int i; |
| LOAD_ZERO; |
| register vec_s16 vec1, *pv; |
| register vec_s32 res = vec_splat_s32(0), t; |
| register vec_u32 shifts; |
| DECLARE_ALIGNED_16(int32_t, ires); |
| |
| shifts = zero_u32v; |
| if(shift & 0x10) shifts = vec_add(shifts, vec_sl(vec_splat_u32(0x08), vec_splat_u32(0x1))); |
| if(shift & 0x08) shifts = vec_add(shifts, vec_splat_u32(0x08)); |
| if(shift & 0x04) shifts = vec_add(shifts, vec_splat_u32(0x04)); |
| if(shift & 0x02) shifts = vec_add(shifts, vec_splat_u32(0x02)); |
| if(shift & 0x01) shifts = vec_add(shifts, vec_splat_u32(0x01)); |
| |
| for(i = 0; i < order; i += 8){ |
| pv = (vec_s16*)v1; |
| vec1 = vec_perm(pv[0], pv[1], vec_lvsl(0, v1)); |
| t = vec_msum(vec1, vec_ld(0, v2), zero_s32v); |
| t = vec_sr(t, shifts); |
| res = vec_sums(t, res); |
| v1 += 8; |
| v2 += 8; |
| } |
| res = vec_splat(res, 3); |
| vec_ste(res, 0, &ires); |
| return ires; |
| } |
| |
| void int_init_altivec(DSPContext* c, AVCodecContext *avctx) |
| { |
| c->ssd_int8_vs_int16 = ssd_int8_vs_int16_altivec; |
| c->add_int16 = add_int16_altivec; |
| c->sub_int16 = sub_int16_altivec; |
| c->scalarproduct_int16 = scalarproduct_int16_altivec; |
| } |