/* * 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 */ #include "config.h" #include <stdint.h> #include "libavutil/attributes.h" #include "libavutil/cpu.h" #include "libavutil/ppc/cpu.h" #include "libavutil/ppc/util_altivec.h" #include "libavcodec/svq1enc.h" #if HAVE_ALTIVEC static int ssd_int8_vs_int16_altivec(const int8_t *pix1, const int16_t *pix2, int size) { int i, size16 = size >> 4; vector signed char vpix1; vector signed short vpix2, vdiff, vpix1l, vpix1h; union { vector signed int vscore; int32_t score[4]; } u = { .vscore = vec_splat_s32(0) }; 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]; } #endif /* HAVE_ALTIVEC */ av_cold void ff_svq1enc_init_ppc(SVQ1EncContext *c) { #if HAVE_ALTIVEC if (!PPC_ALTIVEC(av_get_cpu_flags())) return; c->ssd_int8_vs_int16 = ssd_int8_vs_int16_altivec; #endif /* HAVE_ALTIVEC */ }