/*
 * SIMD-optimized halfpel functions are compiled twice for rnd/no_rnd
 * Copyright (c) 2000, 2001 Fabrice Bellard
 * Copyright (c) 2003-2004 Michael Niedermayer <michaelni@gmx.at>
 *
 * MMX optimization by Nick Kurshev <nickols_k@mail.ru>
 * mostly rewritten by Michael Niedermayer <michaelni@gmx.at>
 * and improved by Zdenek Kabelac <kabi@users.sf.net>
 *
 * This file is part of Libav.
 *
 * Libav 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.
 *
 * Libav 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 Libav; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include <stddef.h>
#include <stdint.h>

#include "inline_asm.h"

// put_pixels
STATIC void DEF(put, pixels8_xy2)(uint8_t *block, const uint8_t *pixels,
                                  ptrdiff_t line_size, int h)
{
    MOVQ_ZERO(mm7);
    SET_RND(mm6); // =2 for rnd  and  =1 for no_rnd version
    __asm__ volatile(
        "movq   (%1), %%mm0             \n\t"
        "movq   1(%1), %%mm4            \n\t"
        "movq   %%mm0, %%mm1            \n\t"
        "movq   %%mm4, %%mm5            \n\t"
        "punpcklbw %%mm7, %%mm0         \n\t"
        "punpcklbw %%mm7, %%mm4         \n\t"
        "punpckhbw %%mm7, %%mm1         \n\t"
        "punpckhbw %%mm7, %%mm5         \n\t"
        "paddusw %%mm0, %%mm4           \n\t"
        "paddusw %%mm1, %%mm5           \n\t"
        "xor %%"FF_REG_a", %%"FF_REG_a" \n\t"
        "add    %3, %1                  \n\t"
        ".p2align 3                     \n\t"
        "1:                             \n\t"
        "movq  (%1, %%"FF_REG_a"), %%mm0\n\t"
        "movq 1(%1, %%"FF_REG_a"), %%mm2\n\t"
        "movq   %%mm0, %%mm1            \n\t"
        "movq   %%mm2, %%mm3            \n\t"
        "punpcklbw %%mm7, %%mm0         \n\t"
        "punpcklbw %%mm7, %%mm2         \n\t"
        "punpckhbw %%mm7, %%mm1         \n\t"
        "punpckhbw %%mm7, %%mm3         \n\t"
        "paddusw %%mm2, %%mm0           \n\t"
        "paddusw %%mm3, %%mm1           \n\t"
        "paddusw %%mm6, %%mm4           \n\t"
        "paddusw %%mm6, %%mm5           \n\t"
        "paddusw %%mm0, %%mm4           \n\t"
        "paddusw %%mm1, %%mm5           \n\t"
        "psrlw  $2, %%mm4               \n\t"
        "psrlw  $2, %%mm5               \n\t"
        "packuswb  %%mm5, %%mm4         \n\t"
        "movq %%mm4, (%2, %%"FF_REG_a") \n\t"
        "add  %3, %%"FF_REG_a"          \n\t"

        "movq  (%1, %%"FF_REG_a"), %%mm2\n\t" // 0 <-> 2   1 <-> 3
        "movq 1(%1, %%"FF_REG_a"), %%mm4\n\t"
        "movq   %%mm2, %%mm3            \n\t"
        "movq   %%mm4, %%mm5            \n\t"
        "punpcklbw %%mm7, %%mm2         \n\t"
        "punpcklbw %%mm7, %%mm4         \n\t"
        "punpckhbw %%mm7, %%mm3         \n\t"
        "punpckhbw %%mm7, %%mm5         \n\t"
        "paddusw %%mm2, %%mm4           \n\t"
        "paddusw %%mm3, %%mm5           \n\t"
        "paddusw %%mm6, %%mm0           \n\t"
        "paddusw %%mm6, %%mm1           \n\t"
        "paddusw %%mm4, %%mm0           \n\t"
        "paddusw %%mm5, %%mm1           \n\t"
        "psrlw  $2, %%mm0               \n\t"
        "psrlw  $2, %%mm1               \n\t"
        "packuswb  %%mm1, %%mm0         \n\t"
        "movq %%mm0, (%2, %%"FF_REG_a") \n\t"
        "add  %3, %%"FF_REG_a"          \n\t"

        "subl   $2, %0                  \n\t"
        "jnz    1b                      \n\t"
        :"+g"(h), "+S"(pixels)
        :"D"(block), "r"((x86_reg)line_size)
        :FF_REG_a, "memory");
}

// avg_pixels
// this routine is 'slightly' suboptimal but mostly unused
STATIC void DEF(avg, pixels8_xy2)(uint8_t *block, const uint8_t *pixels,
                                  ptrdiff_t line_size, int h)
{
    MOVQ_ZERO(mm7);
    SET_RND(mm6); // =2 for rnd  and  =1 for no_rnd version
    __asm__ volatile(
        "movq   (%1), %%mm0             \n\t"
        "movq   1(%1), %%mm4            \n\t"
        "movq   %%mm0, %%mm1            \n\t"
        "movq   %%mm4, %%mm5            \n\t"
        "punpcklbw %%mm7, %%mm0         \n\t"
        "punpcklbw %%mm7, %%mm4         \n\t"
        "punpckhbw %%mm7, %%mm1         \n\t"
        "punpckhbw %%mm7, %%mm5         \n\t"
        "paddusw %%mm0, %%mm4           \n\t"
        "paddusw %%mm1, %%mm5           \n\t"
        "xor %%"FF_REG_a", %%"FF_REG_a" \n\t"
        "add    %3, %1                  \n\t"
        ".p2align 3                     \n\t"
        "1:                             \n\t"
        "movq  (%1, %%"FF_REG_a"), %%mm0\n\t"
        "movq 1(%1, %%"FF_REG_a"), %%mm2\n\t"
        "movq   %%mm0, %%mm1            \n\t"
        "movq   %%mm2, %%mm3            \n\t"
        "punpcklbw %%mm7, %%mm0         \n\t"
        "punpcklbw %%mm7, %%mm2         \n\t"
        "punpckhbw %%mm7, %%mm1         \n\t"
        "punpckhbw %%mm7, %%mm3         \n\t"
        "paddusw %%mm2, %%mm0           \n\t"
        "paddusw %%mm3, %%mm1           \n\t"
        "paddusw %%mm6, %%mm4           \n\t"
        "paddusw %%mm6, %%mm5           \n\t"
        "paddusw %%mm0, %%mm4           \n\t"
        "paddusw %%mm1, %%mm5           \n\t"
        "psrlw  $2, %%mm4               \n\t"
        "psrlw  $2, %%mm5               \n\t"
        "movq (%2, %%"FF_REG_a"), %%mm3 \n\t"
        "packuswb  %%mm5, %%mm4         \n\t"
                "pcmpeqd %%mm2, %%mm2   \n\t"
                "paddb %%mm2, %%mm2     \n\t"
                PAVGB_MMX(%%mm3, %%mm4, %%mm5, %%mm2)
        "movq %%mm5, (%2, %%"FF_REG_a") \n\t"
        "add %3, %%"FF_REG_a"           \n\t"

        "movq  (%1, %%"FF_REG_a"), %%mm2\n\t" // 0 <-> 2   1 <-> 3
        "movq 1(%1, %%"FF_REG_a"), %%mm4\n\t"
        "movq   %%mm2, %%mm3            \n\t"
        "movq   %%mm4, %%mm5            \n\t"
        "punpcklbw %%mm7, %%mm2         \n\t"
        "punpcklbw %%mm7, %%mm4         \n\t"
        "punpckhbw %%mm7, %%mm3         \n\t"
        "punpckhbw %%mm7, %%mm5         \n\t"
        "paddusw %%mm2, %%mm4           \n\t"
        "paddusw %%mm3, %%mm5           \n\t"
        "paddusw %%mm6, %%mm0           \n\t"
        "paddusw %%mm6, %%mm1           \n\t"
        "paddusw %%mm4, %%mm0           \n\t"
        "paddusw %%mm5, %%mm1           \n\t"
        "psrlw  $2, %%mm0               \n\t"
        "psrlw  $2, %%mm1               \n\t"
        "movq (%2, %%"FF_REG_a"), %%mm3 \n\t"
        "packuswb  %%mm1, %%mm0         \n\t"
                "pcmpeqd %%mm2, %%mm2   \n\t"
                "paddb %%mm2, %%mm2     \n\t"
                PAVGB_MMX(%%mm3, %%mm0, %%mm1, %%mm2)
        "movq %%mm1, (%2, %%"FF_REG_a") \n\t"
        "add  %3, %%"FF_REG_a"          \n\t"

        "subl   $2, %0                  \n\t"
        "jnz    1b                      \n\t"
        :"+g"(h), "+S"(pixels)
        :"D"(block), "r"((x86_reg)line_size)
        :FF_REG_a, "memory");
}
