libswresample/x86/resample_mmx.h

Go to the documentation of this file.

/*
 * Copyright (c) 2012 Michael Niedermayer <michaelni@gmx.at>
 *
 * 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 "libavutil/x86/asm.h"
#include "libavutil/cpu.h"
#include "libswresample/swresample_internal.h"

int swri_resample_int16_mmx2 (struct ResampleContext *c, int16_t *dst, const int16_t *src, int *consumed, int src_size, int dst_size, int update_ctx);
int swri_resample_int16_ssse3(struct ResampleContext *c, int16_t *dst, const int16_t *src, int *consumed, int src_size, int dst_size, int update_ctx);

DECLARE_ALIGNED(16, const uint64_t, ff_resample_int16_rounder)[2]    = { 0x0000000000004000ULL, 0x0000000000000000ULL};

#define COMMON_CORE_INT16_MMX2 \
    x86_reg len= -2*c->filter_length;\
__asm__ volatile(\
    "movq "MANGLE(ff_resample_int16_rounder)", %%mm0 \n\t"\
    "1:                         \n\t"\
    "movq    (%1, %0), %%mm1    \n\t"\
    "pmaddwd (%2, %0), %%mm1    \n\t"\
    "paddd  %%mm1, %%mm0        \n\t"\
    "add       $8, %0           \n\t"\
    " js 1b                     \n\t"\
    "pshufw $0x0E, %%mm0, %%mm1 \n\t"\
    "paddd %%mm1, %%mm0         \n\t"\
    "psrad    $15, %%mm0        \n\t"\
    "packssdw %%mm0, %%mm0      \n\t"\
    "movd %%mm0, (%3)           \n\t"\
    : "+r" (len)\
    : "r" (((uint8_t*)(src+sample_index))-len),\
      "r" (((uint8_t*)filter)-len),\
      "r" (dst+dst_index)\
);

#define COMMON_CORE_INT16_SSSE3 \
    x86_reg len= -2*c->filter_length;\
__asm__ volatile(\
    "movdqa "MANGLE(ff_resample_int16_rounder)", %%xmm0 \n\t"\
    "1:                           \n\t"\
    "movdqu  (%1, %0), %%xmm1     \n\t"\
    "pmaddwd (%2, %0), %%xmm1     \n\t"\
    "paddd  %%xmm1, %%xmm0        \n\t"\
    "add       $16, %0            \n\t"\
    " js 1b                       \n\t"\
    "phaddd %%xmm0, %%xmm0        \n\t"\
    "phaddd %%xmm0, %%xmm0        \n\t"\
    "psrad    $15, %%xmm0         \n\t"\
    "packssdw %%xmm0, %%xmm0      \n\t"\
    "movd %%xmm0, (%3)            \n\t"\
    : "+r" (len)\
    : "r" (((uint8_t*)(src+sample_index))-len),\
      "r" (((uint8_t*)filter)-len),\
      "r" (dst+dst_index)\
);

---