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ssd_int8_vs_int16_altivec, not completely benchmarkedwith svq1
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/* | ||
* 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 | ||
*/ | ||
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/** | ||
** @file int_altivec.c | ||
** integer misc ops. | ||
**/ | ||
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#include "../dsputil.h" | ||
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#include "gcc_fixes.h" | ||
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#include "dsputil_altivec.h" | ||
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static int ssd_int8_vs_int16_altivec(int8_t *pix1, 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 | ||
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#define vec_unaligned_load(b) \ | ||
vec_perm(vec_ld(0,b),vec_ld(15,b),vec_lvsl(0, b)); | ||
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size16 = size >> 4; | ||
while(size16) { | ||
// score += (pix1[i]-pix2[i])*(pix1[i]-pix2[i]); | ||
//load pix1 and the first batch of pix2 | ||
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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)); | ||
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size %= 16; | ||
for (i = 0; i < size; i++) { | ||
u.score[3] += (pix1[i]-pix2[i])*(pix1[i]-pix2[i]); | ||
} | ||
return u.score[3]; | ||
} | ||
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void int_init_altivec(DSPContext* c, AVCodecContext *avctx) | ||
{ | ||
c->ssd_int8_vs_int16 = ssd_int8_vs_int16_altivec; | ||
} |