ffmpeg/libavcodec/i386/dsputil_mmx_avg.h

/*
 * DSP utils : average functions are compiled twice for 3dnow/mmx2
 * Copyright (c) 2000, 2001 Fabrice Bellard.
 * Copyright (c) 2002-2004 Michael Niedermayer
 *
 * 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 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
 */

/* This header intentionally has no multiple inclusion guards. It is meant to
 * be included multiple times and generates different code depending on the
 * value of certain #defines. */

/* XXX: we use explicit registers to avoid a gcc 2.95.2 register asm
   clobber bug - now it will work with 2.95.2 and also with -fPIC
 */
static void DEF(put_pixels8_x2)(uint8_t *block, const uint8_t *pixels, int line_size, int h)
{
    asm volatile(
        "lea (%3, %3), %%"REG_a"        \n\t"
        "1:                             \n\t"
        "movq (%1), %%mm0               \n\t"
        "movq (%1, %3), %%mm1           \n\t"
        PAVGB" 1(%1), %%mm0             \n\t"
        PAVGB" 1(%1, %3), %%mm1         \n\t"
        "movq %%mm0, (%2)               \n\t"
        "movq %%mm1, (%2, %3)           \n\t"
        "add %%"REG_a", %1              \n\t"
        "add %%"REG_a", %2              \n\t"
        "movq (%1), %%mm0               \n\t"
        "movq (%1, %3), %%mm1           \n\t"
        PAVGB" 1(%1), %%mm0             \n\t"
        PAVGB" 1(%1, %3), %%mm1         \n\t"
        "add %%"REG_a", %1              \n\t"
        "movq %%mm0, (%2)               \n\t"
        "movq %%mm1, (%2, %3)           \n\t"
        "add %%"REG_a", %2              \n\t"
        "subl $4, %0                    \n\t"
        "jnz 1b                         \n\t"
        :"+g"(h), "+S"(pixels), "+D"(block)
        :"r" ((x86_reg)line_size)
        :"%"REG_a, "memory");
}

static void DEF(put_pixels4_l2)(uint8_t *dst, uint8_t *src1, uint8_t *src2, int dstStride, int src1Stride, int h)
{
    asm volatile(
        "testl $1, %0                   \n\t"
            " jz 1f                     \n\t"
        "movd   (%1), %%mm0             \n\t"
        "movd   (%2), %%mm1             \n\t"
        "add    %4, %1                  \n\t"
        "add    $4, %2                  \n\t"
        PAVGB" %%mm1, %%mm0             \n\t"
        "movd   %%mm0, (%3)             \n\t"
        "add    %5, %3                  \n\t"
        "decl   %0                      \n\t"
        "1:                             \n\t"
        "movd   (%1), %%mm0             \n\t"
        "add    %4, %1                  \n\t"
        "movd   (%1), %%mm1             \n\t"
        "movd   (%2), %%mm2             \n\t"
        "movd   4(%2), %%mm3            \n\t"
        "add    %4, %1                  \n\t"
        PAVGB" %%mm2, %%mm0             \n\t"
        PAVGB" %%mm3, %%mm1             \n\t"
        "movd   %%mm0, (%3)             \n\t"
        "add    %5, %3                  \n\t"
        "movd   %%mm1, (%3)             \n\t"
        "add    %5, %3                  \n\t"
        "movd   (%1), %%mm0             \n\t"
        "add    %4, %1                  \n\t"
        "movd   (%1), %%mm1             \n\t"
        "movd   8(%2), %%mm2            \n\t"
        "movd   12(%2), %%mm3           \n\t"
        "add    %4, %1                  \n\t"
        PAVGB" %%mm2, %%mm0             \n\t"
        PAVGB" %%mm3, %%mm1             \n\t"
        "movd   %%mm0, (%3)             \n\t"
        "add    %5, %3                  \n\t"
        "movd   %%mm1, (%3)             \n\t"
        "add    %5, %3                  \n\t"
        "add    $16, %2                 \n\t"
        "subl   $4, %0                  \n\t"
        "jnz    1b                      \n\t"
#ifdef PIC //Note "+bm" and "+mb" are buggy too (with gcc 3.2.2 at least) and cannot be used
        :"+m"(h), "+a"(src1), "+c"(src2), "+d"(dst)
#else
        :"+b"(h), "+a"(src1), "+c"(src2), "+d"(dst)
#endif
        :"S"((x86_reg)src1Stride), "D"((x86_reg)dstStride)
        :"memory");
}


static void DEF(put_pixels8_l2)(uint8_t *dst, uint8_t *src1, uint8_t *src2, int dstStride, int src1Stride, int h)
{
    asm volatile(
        "testl $1, %0                   \n\t"
            " jz 1f                     \n\t"
        "movq   (%1), %%mm0             \n\t"
        "movq   (%2), %%mm1             \n\t"
        "add    %4, %1                  \n\t"
        "add    $8, %2                  \n\t"
        PAVGB" %%mm1, %%mm0             \n\t"
        "movq   %%mm0, (%3)             \n\t"
        "add    %5, %3                  \n\t"
        "decl   %0                      \n\t"
        "1:                             \n\t"
        "movq   (%1), %%mm0             \n\t"
        "add    %4, %1                  \n\t"
        "movq   (%1), %%mm1             \n\t"
        "add    %4, %1                  \n\t"
        PAVGB" (%2), %%mm0              \n\t"
        PAVGB" 8(%2), %%mm1             \n\t"
        "movq   %%mm0, (%3)             \n\t"
        "add    %5, %3                  \n\t"
        "movq   %%mm1, (%3)             \n\t"
        "add    %5, %3                  \n\t"
        "movq   (%1), %%mm0             \n\t"
        "add    %4, %1                  \n\t"
        "movq   (%1), %%mm1             \n\t"
        "add    %4, %1                  \n\t"
        PAVGB" 16(%2), %%mm0            \n\t"
        PAVGB" 24(%2), %%mm1            \n\t"
        "movq   %%mm0, (%3)             \n\t"
        "add    %5, %3                  \n\t"
        "movq   %%mm1, (%3)             \n\t"
        "add    %5, %3                  \n\t"
        "add    $32, %2                 \n\t"
        "subl   $4, %0                  \n\t"
        "jnz    1b                      \n\t"
#ifdef PIC //Note "+bm" and "+mb" are buggy too (with gcc 3.2.2 at least) and cannot be used
        :"+m"(h), "+a"(src1), "+c"(src2), "+d"(dst)
#else
        :"+b"(h), "+a"(src1), "+c"(src2), "+d"(dst)
#endif
        :"S"((x86_reg)src1Stride), "D"((x86_reg)dstStride)
        :"memory");
//the following should be used, though better not with gcc ...
/*        :"+g"(h), "+r"(src1), "+r"(src2), "+r"(dst)
        :"r"(src1Stride), "r"(dstStride)
        :"memory");*/
}

static void DEF(put_no_rnd_pixels8_l2)(uint8_t *dst, uint8_t *src1, uint8_t *src2, int dstStride, int src1Stride, int h)
{
    asm volatile(
        "pcmpeqb %%mm6, %%mm6           \n\t"
        "testl $1, %0                   \n\t"
            " jz 1f                     \n\t"
        "movq   (%1), %%mm0             \n\t"
        "movq   (%2), %%mm1             \n\t"
        "add    %4, %1                  \n\t"
        "add    $8, %2                  \n\t"
        "pxor %%mm6, %%mm0              \n\t"
        "pxor %%mm6, %%mm1              \n\t"
        PAVGB" %%mm1, %%mm0             \n\t"
        "pxor %%mm6, %%mm0              \n\t"
        "movq   %%mm0, (%3)             \n\t"
        "add    %5, %3                  \n\t"
        "decl   %0                      \n\t"
        "1:                             \n\t"
        "movq   (%1), %%mm0             \n\t"
        "add    %4, %1                  \n\t"
        "movq   (%1), %%mm1             \n\t"
        "add    %4, %1                  \n\t"
        "movq   (%2), %%mm2             \n\t"
        "movq   8(%2), %%mm3            \n\t"
        "pxor %%mm6, %%mm0              \n\t"
        "pxor %%mm6, %%mm1              \n\t"
        "pxor %%mm6, %%mm2              \n\t"
        "pxor %%mm6, %%mm3              \n\t"
        PAVGB" %%mm2, %%mm0             \n\t"
        PAVGB" %%mm3, %%mm1             \n\t"
        "pxor %%mm6, %%mm0              \n\t"
        "pxor %%mm6, %%mm1              \n\t"
        "movq   %%mm0, (%3)             \n\t"
        "add    %5, %3                  \n\t"
        "movq   %%mm1, (%3)             \n\t"
        "add    %5, %3                  \n\t"
        "movq   (%1), %%mm0             \n\t"
        "add    %4, %1                  \n\t"
        "movq   (%1), %%mm1             \n\t"
        "add    %4, %1                  \n\t"
        "movq   16(%2), %%mm2           \n\t"
        "movq   24(%2), %%mm3           \n\t"
        "pxor %%mm6, %%mm0              \n\t"
        "pxor %%mm6, %%mm1              \n\t"
        "pxor %%mm6, %%mm2              \n\t"
        "pxor %%mm6, %%mm3              \n\t"
        PAVGB" %%mm2, %%mm0             \n\t"
        PAVGB" %%mm3, %%mm1             \n\t"
        "pxor %%mm6, %%mm0              \n\t"
        "pxor %%mm6, %%mm1              \n\t"
        "movq   %%mm0, (%3)             \n\t"
        "add    %5, %3                  \n\t"
        "movq   %%mm1, (%3)             \n\t"
        "add    %5, %3                  \n\t"
        "add    $32, %2                 \n\t"
        "subl   $4, %0                  \n\t"
        "jnz    1b                      \n\t"
#ifdef PIC //Note "+bm" and "+mb" are buggy too (with gcc 3.2.2 at least) and cannot be used
        :"+m"(h), "+a"(src1), "+c"(src2), "+d"(dst)
#else
        :"+b"(h), "+a"(src1), "+c"(src2), "+d"(dst)
#endif
        :"S"((x86_reg)src1Stride), "D"((x86_reg)dstStride)
        :"memory");
//the following should be used, though better not with gcc ...
/*        :"+g"(h), "+r"(src1), "+r"(src2), "+r"(dst)
        :"r"(src1Stride), "r"(dstStride)
        :"memory");*/
}

static void DEF(avg_pixels4_l2)(uint8_t *dst, uint8_t *src1, uint8_t *src2, int dstStride, int src1Stride, int h)
{
    asm volatile(
        "testl $1, %0                   \n\t"
            " jz 1f                     \n\t"
        "movd   (%1), %%mm0             \n\t"
        "movd   (%2), %%mm1             \n\t"
        "add    %4, %1                  \n\t"
        "add    $4, %2                  \n\t"
        PAVGB" %%mm1, %%mm0             \n\t"
        PAVGB" (%3), %%mm0              \n\t"
        "movd   %%mm0, (%3)             \n\t"
        "add    %5, %3                  \n\t"
        "decl   %0                      \n\t"
        "1:                             \n\t"
        "movd   (%1), %%mm0             \n\t"
        "add    %4, %1                  \n\t"
        "movd   (%1), %%mm1             \n\t"
        "add    %4, %1                  \n\t"
        PAVGB" (%2), %%mm0              \n\t"
        PAVGB" 4(%2), %%mm1             \n\t"
        PAVGB" (%3), %%mm0              \n\t"
        "movd   %%mm0, (%3)             \n\t"
        "add    %5, %3                  \n\t"
        PAVGB" (%3), %%mm1              \n\t"
        "movd   %%mm1, (%3)             \n\t"
        "add    %5, %3                  \n\t"
        "movd   (%1), %%mm0             \n\t"
        "add    %4, %1                  \n\t"
        "movd   (%1), %%mm1             \n\t"
        "add    %4, %1                  \n\t"
        PAVGB" 8(%2), %%mm0             \n\t"
        PAVGB" 12(%2), %%mm1            \n\t"
        PAVGB" (%3), %%mm0              \n\t"
        "movd   %%mm0, (%3)             \n\t"
        "add    %5, %3                  \n\t"
        PAVGB" (%3), %%mm1              \n\t"
        "movd   %%mm1, (%3)             \n\t"
        "add    %5, %3                  \n\t"
        "add    $16, %2                 \n\t"
        "subl   $4, %0                  \n\t"
        "jnz    1b                      \n\t"
#ifdef PIC //Note "+bm" and "+mb" are buggy too (with gcc 3.2.2 at least) and cannot be used
        :"+m"(h), "+a"(src1), "+c"(src2), "+d"(dst)
#else
        :"+b"(h), "+a"(src1), "+c"(src2), "+d"(dst)
#endif
        :"S"((x86_reg)src1Stride), "D"((x86_reg)dstStride)
        :"memory");
}


static void DEF(avg_pixels8_l2)(uint8_t *dst, uint8_t *src1, uint8_t *src2, int dstStride, int src1Stride, int h)
{
    asm volatile(
        "testl $1, %0                   \n\t"
            " jz 1f                     \n\t"
        "movq   (%1), %%mm0             \n\t"
        "movq   (%2), %%mm1             \n\t"
        "add    %4, %1                  \n\t"
        "add    $8, %2                  \n\t"
        PAVGB" %%mm1, %%mm0             \n\t"
        PAVGB" (%3), %%mm0              \n\t"
        "movq   %%mm0, (%3)             \n\t"
        "add    %5, %3                  \n\t"
        "decl   %0                      \n\t"
        "1:                             \n\t"
        "movq   (%1), %%mm0             \n\t"
        "add    %4, %1                  \n\t"
        "movq   (%1), %%mm1             \n\t"
        "add    %4, %1                  \n\t"
        PAVGB" (%2), %%mm0              \n\t"
        PAVGB" 8(%2), %%mm1             \n\t"
        PAVGB" (%3), %%mm0              \n\t"
        "movq   %%mm0, (%3)             \n\t"
        "add    %5, %3                  \n\t"
        PAVGB" (%3), %%mm1              \n\t"
        "movq   %%mm1, (%3)             \n\t"
        "add    %5, %3                  \n\t"
        "movq   (%1), %%mm0             \n\t"
        "add    %4, %1                  \n\t"
        "movq   (%1), %%mm1             \n\t"
        "add    %4, %1                  \n\t"
        PAVGB" 16(%2), %%mm0            \n\t"
        PAVGB" 24(%2), %%mm1            \n\t"
        PAVGB" (%3), %%mm0              \n\t"
        "movq   %%mm0, (%3)             \n\t"
        "add    %5, %3                  \n\t"
        PAVGB" (%3), %%mm1              \n\t"
        "movq   %%mm1, (%3)             \n\t"
        "add    %5, %3                  \n\t"
        "add    $32, %2                 \n\t"
        "subl   $4, %0                  \n\t"
        "jnz    1b                      \n\t"
#ifdef PIC //Note "+bm" and "+mb" are buggy too (with gcc 3.2.2 at least) and cannot be used
        :"+m"(h), "+a"(src1), "+c"(src2), "+d"(dst)
#else
        :"+b"(h), "+a"(src1), "+c"(src2), "+d"(dst)
#endif
        :"S"((x86_reg)src1Stride), "D"((x86_reg)dstStride)
        :"memory");
//the following should be used, though better not with gcc ...
/*        :"+g"(h), "+r"(src1), "+r"(src2), "+r"(dst)
        :"r"(src1Stride), "r"(dstStride)
        :"memory");*/
}

static void DEF(put_pixels16_x2)(uint8_t *block, const uint8_t *pixels, int line_size, int h)
{
    asm volatile(
        "lea (%3, %3), %%"REG_a"        \n\t"
        "1:                             \n\t"
        "movq (%1), %%mm0               \n\t"
        "movq (%1, %3), %%mm1           \n\t"
        "movq 8(%1), %%mm2              \n\t"
        "movq 8(%1, %3), %%mm3          \n\t"
        PAVGB" 1(%1), %%mm0             \n\t"
        PAVGB" 1(%1, %3), %%mm1         \n\t"
        PAVGB" 9(%1), %%mm2             \n\t"
        PAVGB" 9(%1, %3), %%mm3         \n\t"
        "movq %%mm0, (%2)               \n\t"
        "movq %%mm1, (%2, %3)           \n\t"
        "movq %%mm2, 8(%2)              \n\t"
        "movq %%mm3, 8(%2, %3)          \n\t"
        "add %%"REG_a", %1              \n\t"
        "add %%"REG_a", %2              \n\t"
        "movq (%1), %%mm0               \n\t"
        "movq (%1, %3), %%mm1           \n\t"
        "movq 8(%1), %%mm2              \n\t"
        "movq 8(%1, %3), %%mm3          \n\t"
        PAVGB" 1(%1), %%mm0             \n\t"
        PAVGB" 1(%1, %3), %%mm1         \n\t"
        PAVGB" 9(%1), %%mm2             \n\t"
        PAVGB" 9(%1, %3), %%mm3         \n\t"
        "add %%"REG_a", %1              \n\t"
        "movq %%mm0, (%2)               \n\t"
        "movq %%mm1, (%2, %3)           \n\t"
        "movq %%mm2, 8(%2)              \n\t"
        "movq %%mm3, 8(%2, %3)          \n\t"
        "add %%"REG_a", %2              \n\t"
        "subl $4, %0                    \n\t"
        "jnz 1b                         \n\t"
        :"+g"(h), "+S"(pixels), "+D"(block)
        :"r" ((x86_reg)line_size)
        :"%"REG_a, "memory");
}

static void DEF(put_pixels16_l2)(uint8_t *dst, uint8_t *src1, uint8_t *src2, int dstStride, int src1Stride, int h)
{
    asm volatile(
        "testl $1, %0                   \n\t"
            " jz 1f                     \n\t"
        "movq   (%1), %%mm0             \n\t"
        "movq   8(%1), %%mm1            \n\t"
        PAVGB" (%2), %%mm0              \n\t"
        PAVGB" 8(%2), %%mm1             \n\t"
        "add    %4, %1                  \n\t"
        "add    $16, %2                 \n\t"
        "movq   %%mm0, (%3)             \n\t"
        "movq   %%mm1, 8(%3)            \n\t"
        "add    %5, %3                  \n\t"
        "decl   %0                      \n\t"
        "1:                             \n\t"
        "movq   (%1), %%mm0             \n\t"
        "movq   8(%1), %%mm1            \n\t"
        "add    %4, %1                  \n\t"
        PAVGB" (%2), %%mm0              \n\t"
        PAVGB" 8(%2), %%mm1             \n\t"
        "movq   %%mm0, (%3)             \n\t"
        "movq   %%mm1, 8(%3)            \n\t"
        "add    %5, %3                  \n\t"
        "movq   (%1), %%mm0             \n\t"
        "movq   8(%1), %%mm1            \n\t"
        "add    %4, %1                  \n\t"
        PAVGB" 16(%2), %%mm0            \n\t"
        PAVGB" 24(%2), %%mm1            \n\t"
        "movq   %%mm0, (%3)             \n\t"
        "movq   %%mm1, 8(%3)            \n\t"
        "add    %5, %3                  \n\t"
        "add    $32, %2                 \n\t"
        "subl   $2, %0                  \n\t"
        "jnz    1b                      \n\t"
#ifdef PIC //Note "+bm" and "+mb" are buggy too (with gcc 3.2.2 at least) and cannot be used
        :"+m"(h), "+a"(src1), "+c"(src2), "+d"(dst)
#else
        :"+b"(h), "+a"(src1), "+c"(src2), "+d"(dst)
#endif
        :"S"((x86_reg)src1Stride), "D"((x86_reg)dstStride)
        :"memory");
//the following should be used, though better not with gcc ...
/*        :"+g"(h), "+r"(src1), "+r"(src2), "+r"(dst)
        :"r"(src1Stride), "r"(dstStride)
        :"memory");*/
}

static void DEF(avg_pixels16_l2)(uint8_t *dst, uint8_t *src1, uint8_t *src2, int dstStride, int src1Stride, int h)
{
    asm volatile(
        "testl $1, %0                   \n\t"
            " jz 1f                     \n\t"
        "movq   (%1), %%mm0             \n\t"
        "movq   8(%1), %%mm1            \n\t"
        PAVGB" (%2), %%mm0              \n\t"
        PAVGB" 8(%2), %%mm1             \n\t"
        "add    %4, %1                  \n\t"
        "add    $16, %2                 \n\t"
        PAVGB" (%3), %%mm0              \n\t"
        PAVGB" 8(%3), %%mm1             \n\t"
        "movq   %%mm0, (%3)             \n\t"
        "movq   %%mm1, 8(%3)            \n\t"
        "add    %5, %3                  \n\t"
        "decl   %0                      \n\t"
        "1:                             \n\t"
        "movq   (%1), %%mm0             \n\t"
        "movq   8(%1), %%mm1            \n\t"
        "add    %4, %1                  \n\t"
        PAVGB" (%2), %%mm0              \n\t"
        PAVGB" 8(%2), %%mm1             \n\t"
        PAVGB" (%3), %%mm0              \n\t"
        PAVGB" 8(%3), %%mm1             \n\t"
        "movq   %%mm0, (%3)             \n\t"
        "movq   %%mm1, 8(%3)            \n\t"
        "add    %5, %3                  \n\t"
        "movq   (%1), %%mm0             \n\t"
        "movq   8(%1), %%mm1            \n\t"
        "add    %4, %1                  \n\t"
        PAVGB" 16(%2), %%mm0            \n\t"
        PAVGB" 24(%2), %%mm1            \n\t"
        PAVGB" (%3), %%mm0              \n\t"
        PAVGB" 8(%3), %%mm1             \n\t"
        "movq   %%mm0, (%3)             \n\t"
        "movq   %%mm1, 8(%3)            \n\t"
        "add    %5, %3                  \n\t"
        "add    $32, %2                 \n\t"
        "subl   $2, %0                  \n\t"
        "jnz    1b                      \n\t"
#ifdef PIC //Note "+bm" and "+mb" are buggy too (with gcc 3.2.2 at least) and cannot be used
        :"+m"(h), "+a"(src1), "+c"(src2), "+d"(dst)
#else
        :"+b"(h), "+a"(src1), "+c"(src2), "+d"(dst)
#endif
        :"S"((x86_reg)src1Stride), "D"((x86_reg)dstStride)
        :"memory");
//the following should be used, though better not with gcc ...
/*        :"+g"(h), "+r"(src1), "+r"(src2), "+r"(dst)
        :"r"(src1Stride), "r"(dstStride)
        :"memory");*/
}

static void DEF(put_no_rnd_pixels16_l2)(uint8_t *dst, uint8_t *src1, uint8_t *src2, int dstStride, int src1Stride, int h)
{
    asm volatile(
        "pcmpeqb %%mm6, %%mm6           \n\t"
        "testl $1, %0                   \n\t"
            " jz 1f                     \n\t"
        "movq   (%1), %%mm0             \n\t"
        "movq   8(%1), %%mm1            \n\t"
        "movq   (%2), %%mm2             \n\t"
        "movq   8(%2), %%mm3            \n\t"
        "pxor %%mm6, %%mm0              \n\t"
        "pxor %%mm6, %%mm1              \n\t"
        "pxor %%mm6, %%mm2              \n\t"
        "pxor %%mm6, %%mm3              \n\t"
        PAVGB" %%mm2, %%mm0             \n\t"
        PAVGB" %%mm3, %%mm1             \n\t"
        "pxor %%mm6, %%mm0              \n\t"
        "pxor %%mm6, %%mm1              \n\t"
        "add    %4, %1                  \n\t"
        "add    $16, %2                 \n\t"
        "movq   %%mm0, (%3)             \n\t"
        "movq   %%mm1, 8(%3)            \n\t"
        "add    %5, %3                  \n\t"
        "decl   %0                      \n\t"
        "1:                             \n\t"
        "movq   (%1), %%mm0             \n\t"
        "movq   8(%1), %%mm1            \n\t"
        "add    %4, %1                  \n\t"
        "movq   (%2), %%mm2             \n\t"
        "movq   8(%2), %%mm3            \n\t"
        "pxor %%mm6, %%mm0              \n\t"
        "pxor %%mm6, %%mm1              \n\t"
        "pxor %%mm6, %%mm2              \n\t"
        "pxor %%mm6, %%mm3              \n\t"
        PAVGB" %%mm2, %%mm0             \n\t"
        PAVGB" %%mm3, %%mm1             \n\t"
        "pxor %%mm6, %%mm0              \n\t"
        "pxor %%mm6, %%mm1              \n\t"
        "movq   %%mm0, (%3)             \n\t"
        "movq   %%mm1, 8(%3)            \n\t"
        "add    %5, %3                  \n\t"
        "movq   (%1), %%mm0             \n\t"
        "movq   8(%1), %%mm1            \n\t"
        "add    %4, %1                  \n\t"
        "movq   16(%2), %%mm2           \n\t"
        "movq   24(%2), %%mm3           \n\t"
        "pxor %%mm6, %%mm0              \n\t"
        "pxor %%mm6, %%mm1              \n\t"
        "pxor %%mm6, %%mm2              \n\t"
        "pxor %%mm6, %%mm3              \n\t"
        PAVGB" %%mm2, %%mm0             \n\t"
        PAVGB" %%mm3, %%mm1             \n\t"
        "pxor %%mm6, %%mm0              \n\t"
        "pxor %%mm6, %%mm1              \n\t"
        "movq   %%mm0, (%3)             \n\t"
        "movq   %%mm1, 8(%3)            \n\t"
        "add    %5, %3                  \n\t"
        "add    $32, %2                 \n\t"
        "subl   $2, %0                  \n\t"
        "jnz    1b                      \n\t"
#ifdef PIC //Note "+bm" and "+mb" are buggy too (with gcc 3.2.2 at least) and cannot be used
        :"+m"(h), "+a"(src1), "+c"(src2), "+d"(dst)
#else
        :"+b"(h), "+a"(src1), "+c"(src2), "+d"(dst)
#endif
        :"S"((x86_reg)src1Stride), "D"((x86_reg)dstStride)
        :"memory");
//the following should be used, though better not with gcc ...
/*        :"+g"(h), "+r"(src1), "+r"(src2), "+r"(dst)
        :"r"(src1Stride), "r"(dstStride)
        :"memory");*/
}

/* GL: this function does incorrect rounding if overflow */
static void DEF(put_no_rnd_pixels8_x2)(uint8_t *block, const uint8_t *pixels, int line_size, int h)
{
    MOVQ_BONE(mm6);
    asm volatile(
        "lea (%3, %3), %%"REG_a"        \n\t"
        "1:                             \n\t"
        "movq (%1), %%mm0               \n\t"
        "movq (%1, %3), %%mm2           \n\t"
        "movq 1(%1), %%mm1              \n\t"
        "movq 1(%1, %3), %%mm3          \n\t"
        "add %%"REG_a", %1              \n\t"
        "psubusb %%mm6, %%mm0           \n\t"
        "psubusb %%mm6, %%mm2           \n\t"
        PAVGB" %%mm1, %%mm0             \n\t"
        PAVGB" %%mm3, %%mm2             \n\t"
        "movq %%mm0, (%2)               \n\t"
        "movq %%mm2, (%2, %3)           \n\t"
        "movq (%1), %%mm0               \n\t"
        "movq 1(%1), %%mm1              \n\t"
        "movq (%1, %3), %%mm2           \n\t"
        "movq 1(%1, %3), %%mm3          \n\t"
        "add %%"REG_a", %2              \n\t"
        "add %%"REG_a", %1              \n\t"
        "psubusb %%mm6, %%mm0           \n\t"
        "psubusb %%mm6, %%mm2           \n\t"
        PAVGB" %%mm1, %%mm0             \n\t"
        PAVGB" %%mm3, %%mm2             \n\t"
        "movq %%mm0, (%2)               \n\t"
        "movq %%mm2, (%2, %3)           \n\t"
        "add %%"REG_a", %2              \n\t"
        "subl $4, %0                    \n\t"
        "jnz 1b                         \n\t"
        :"+g"(h), "+S"(pixels), "+D"(block)
        :"r" ((x86_reg)line_size)
        :"%"REG_a, "memory");
}

static void DEF(put_pixels8_y2)(uint8_t *block, const uint8_t *pixels, int line_size, int h)
{
    asm volatile(
        "lea (%3, %3), %%"REG_a"        \n\t"
        "movq (%1), %%mm0               \n\t"
        "sub %3, %2                     \n\t"
        "1:                             \n\t"
        "movq (%1, %3), %%mm1           \n\t"
        "movq (%1, %%"REG_a"), %%mm2    \n\t"
        "add %%"REG_a", %1              \n\t"
        PAVGB" %%mm1, %%mm0             \n\t"
        PAVGB" %%mm2, %%mm1             \n\t"
        "movq %%mm0, (%2, %3)           \n\t"
        "movq %%mm1, (%2, %%"REG_a")    \n\t"
        "movq (%1, %3), %%mm1           \n\t"
        "movq (%1, %%"REG_a"), %%mm0    \n\t"
        "add %%"REG_a", %2              \n\t"
        "add %%"REG_a", %1              \n\t"
        PAVGB" %%mm1, %%mm2             \n\t"
        PAVGB" %%mm0, %%mm1             \n\t"
        "movq %%mm2, (%2, %3)           \n\t"
        "movq %%mm1, (%2, %%"REG_a")    \n\t"
        "add %%"REG_a", %2              \n\t"
        "subl $4, %0                    \n\t"
        "jnz 1b                         \n\t"
        :"+g"(h), "+S"(pixels), "+D" (block)
        :"r" ((x86_reg)line_size)
        :"%"REG_a, "memory");
}

/* GL: this function does incorrect rounding if overflow */
static void DEF(put_no_rnd_pixels8_y2)(uint8_t *block, const uint8_t *pixels, int line_size, int h)
{
    MOVQ_BONE(mm6);
    asm volatile(
        "lea (%3, %3), %%"REG_a"        \n\t"
        "movq (%1), %%mm0               \n\t"
        "sub %3, %2                     \n\t"
        "1:                             \n\t"
        "movq (%1, %3), %%mm1           \n\t"
        "movq (%1, %%"REG_a"), %%mm2    \n\t"
        "add %%"REG_a", %1              \n\t"
        "psubusb %%mm6, %%mm1           \n\t"
        PAVGB" %%mm1, %%mm0             \n\t"
        PAVGB" %%mm2, %%mm1             \n\t"
        "movq %%mm0, (%2, %3)           \n\t"
        "movq %%mm1, (%2, %%"REG_a")    \n\t"
        "movq (%1, %3), %%mm1           \n\t"
        "movq (%1, %%"REG_a"), %%mm0    \n\t"
        "add %%"REG_a", %2              \n\t"
        "add %%"REG_a", %1              \n\t"
        "psubusb %%mm6, %%mm1           \n\t"
        PAVGB" %%mm1, %%mm2             \n\t"
        PAVGB" %%mm0, %%mm1             \n\t"
        "movq %%mm2, (%2, %3)           \n\t"
        "movq %%mm1, (%2, %%"REG_a")    \n\t"
        "add %%"REG_a", %2              \n\t"
        "subl $4, %0                    \n\t"
        "jnz 1b                         \n\t"
        :"+g"(h), "+S"(pixels), "+D" (block)
        :"r" ((x86_reg)line_size)
        :"%"REG_a, "memory");
}

static void DEF(avg_pixels8)(uint8_t *block, const uint8_t *pixels, int line_size, int h)
{
    asm volatile(
        "lea (%3, %3), %%"REG_a"        \n\t"
        "1:                             \n\t"
        "movq (%2), %%mm0               \n\t"
        "movq (%2, %3), %%mm1           \n\t"
        PAVGB" (%1), %%mm0              \n\t"
        PAVGB" (%1, %3), %%mm1          \n\t"
        "movq %%mm0, (%2)               \n\t"
        "movq %%mm1, (%2, %3)           \n\t"
        "add %%"REG_a", %1              \n\t"
        "add %%"REG_a", %2              \n\t"
        "movq (%2), %%mm0               \n\t"
        "movq (%2, %3), %%mm1           \n\t"
        PAVGB" (%1), %%mm0              \n\t"
        PAVGB" (%1, %3), %%mm1          \n\t"
        "add %%"REG_a", %1              \n\t"
        "movq %%mm0, (%2)               \n\t"
        "movq %%mm1, (%2, %3)           \n\t"
        "add %%"REG_a", %2              \n\t"
        "subl $4, %0                    \n\t"
        "jnz 1b                         \n\t"
        :"+g"(h), "+S"(pixels), "+D"(block)
        :"r" ((x86_reg)line_size)
        :"%"REG_a, "memory");
}

static void DEF(avg_pixels8_x2)(uint8_t *block, const uint8_t *pixels, int line_size, int h)
{
    asm volatile(
        "lea (%3, %3), %%"REG_a"        \n\t"
        "1:                             \n\t"
        "movq (%1), %%mm0               \n\t"
        "movq (%1, %3), %%mm2           \n\t"
        PAVGB" 1(%1), %%mm0             \n\t"
        PAVGB" 1(%1, %3), %%mm2         \n\t"
        PAVGB" (%2), %%mm0              \n\t"
        PAVGB" (%2, %3), %%mm2          \n\t"
        "add %%"REG_a", %1              \n\t"
        "movq %%mm0, (%2)               \n\t"
        "movq %%mm2, (%2, %3)           \n\t"
        "movq (%1), %%mm0               \n\t"
        "movq (%1, %3), %%mm2           \n\t"
        PAVGB" 1(%1), %%mm0             \n\t"
        PAVGB" 1(%1, %3), %%mm2         \n\t"
        "add %%"REG_a", %2              \n\t"
        "add %%"REG_a", %1              \n\t"
        PAVGB" (%2), %%mm0              \n\t"
        PAVGB" (%2, %3), %%mm2          \n\t"
        "movq %%mm0, (%2)               \n\t"
        "movq %%mm2, (%2, %3)           \n\t"
        "add %%"REG_a", %2              \n\t"
        "subl $4, %0                    \n\t"
        "jnz 1b                         \n\t"
        :"+g"(h), "+S"(pixels), "+D"(block)
        :"r" ((x86_reg)line_size)
        :"%"REG_a, "memory");
}

static void DEF(avg_pixels8_y2)(uint8_t *block, const uint8_t *pixels, int line_size, int h)
{
    asm volatile(
        "lea (%3, %3), %%"REG_a"        \n\t"
        "movq (%1), %%mm0               \n\t"
        "sub %3, %2                     \n\t"
        "1:                             \n\t"
        "movq (%1, %3), %%mm1           \n\t"
        "movq (%1, %%"REG_a"), %%mm2    \n\t"
        "add %%"REG_a", %1              \n\t"
        PAVGB" %%mm1, %%mm0             \n\t"
        PAVGB" %%mm2, %%mm1             \n\t"
        "movq (%2, %3), %%mm3           \n\t"
        "movq (%2, %%"REG_a"), %%mm4    \n\t"
        PAVGB" %%mm3, %%mm0             \n\t"
        PAVGB" %%mm4, %%mm1             \n\t"
        "movq %%mm0, (%2, %3)           \n\t"
        "movq %%mm1, (%2, %%"REG_a")    \n\t"
        "movq (%1, %3), %%mm1           \n\t"
        "movq (%1, %%"REG_a"), %%mm0    \n\t"
        PAVGB" %%mm1, %%mm2             \n\t"
        PAVGB" %%mm0, %%mm1             \n\t"
        "add %%"REG_a", %2              \n\t"
        "add %%"REG_a", %1              \n\t"
        "movq (%2, %3), %%mm3           \n\t"
        "movq (%2, %%"REG_a"), %%mm4    \n\t"
        PAVGB" %%mm3, %%mm2             \n\t"
        PAVGB" %%mm4, %%mm1             \n\t"
        "movq %%mm2, (%2, %3)           \n\t"
        "movq %%mm1, (%2, %%"REG_a")    \n\t"
        "add %%"REG_a", %2              \n\t"
        "subl $4, %0                    \n\t"
        "jnz 1b                         \n\t"
        :"+g"(h), "+S"(pixels), "+D"(block)
        :"r" ((x86_reg)line_size)
        :"%"REG_a, "memory");
}

/* Note this is not correctly rounded, but this function is only
 * used for B-frames so it does not matter. */
static void DEF(avg_pixels8_xy2)(uint8_t *block, const uint8_t *pixels, int line_size, int h)
{
    MOVQ_BONE(mm6);
    asm volatile(
        "lea (%3, %3), %%"REG_a"        \n\t"
        "movq (%1), %%mm0               \n\t"
        PAVGB" 1(%1), %%mm0             \n\t"
         ASMALIGN(3)
        "1:                             \n\t"
        "movq (%1, %%"REG_a"), %%mm2    \n\t"
        "movq (%1, %3), %%mm1           \n\t"
        "psubusb %%mm6, %%mm2           \n\t"
        PAVGB" 1(%1, %3), %%mm1         \n\t"
        PAVGB" 1(%1, %%"REG_a"), %%mm2  \n\t"
        "add %%"REG_a", %1              \n\t"
        PAVGB" %%mm1, %%mm0             \n\t"
        PAVGB" %%mm2, %%mm1             \n\t"
        PAVGB" (%2), %%mm0              \n\t"
        PAVGB" (%2, %3), %%mm1          \n\t"
        "movq %%mm0, (%2)               \n\t"
        "movq %%mm1, (%2, %3)           \n\t"
        "movq (%1, %3), %%mm1           \n\t"
        "movq (%1, %%"REG_a"), %%mm0    \n\t"
        PAVGB" 1(%1, %3), %%mm1         \n\t"
        PAVGB" 1(%1, %%"REG_a"), %%mm0  \n\t"
        "add %%"REG_a", %2              \n\t"
        "add %%"REG_a", %1              \n\t"
        PAVGB" %%mm1, %%mm2             \n\t"
        PAVGB" %%mm0, %%mm1             \n\t"
        PAVGB" (%2), %%mm2              \n\t"
        PAVGB" (%2, %3), %%mm1          \n\t"
        "movq %%mm2, (%2)               \n\t"
        "movq %%mm1, (%2, %3)           \n\t"
        "add %%"REG_a", %2              \n\t"
        "subl $4, %0                    \n\t"
        "jnz 1b                         \n\t"
        :"+g"(h), "+S"(pixels), "+D"(block)
        :"r" ((x86_reg)line_size)
        :"%"REG_a,  "memory");
}

static void DEF(avg_pixels4)(uint8_t *block, const uint8_t *pixels, int line_size, int h)
{
    do {
        asm volatile(
            "movd (%1), %%mm0               \n\t"
            "movd (%1, %2), %%mm1           \n\t"
            "movd (%1, %2, 2), %%mm2        \n\t"
            "movd (%1, %3), %%mm3           \n\t"
            PAVGB" (%0), %%mm0              \n\t"
            PAVGB" (%0, %2), %%mm1          \n\t"
            PAVGB" (%0, %2, 2), %%mm2       \n\t"
            PAVGB" (%0, %3), %%mm3          \n\t"
            "movd %%mm0, (%1)               \n\t"
            "movd %%mm1, (%1, %2)           \n\t"
            "movd %%mm2, (%1, %2, 2)        \n\t"
            "movd %%mm3, (%1, %3)           \n\t"
            ::"S"(pixels), "D"(block),
             "r" ((x86_reg)line_size), "r"((x86_reg)3L*line_size)
            :"memory");
        block += 4*line_size;
        pixels += 4*line_size;
        h -= 4;
    } while(h > 0);
}

//FIXME the following could be optimized too ...
static void DEF(put_no_rnd_pixels16_x2)(uint8_t *block, const uint8_t *pixels, int line_size, int h){
    DEF(put_no_rnd_pixels8_x2)(block  , pixels  , line_size, h);
    DEF(put_no_rnd_pixels8_x2)(block+8, pixels+8, line_size, h);
}
static void DEF(put_pixels16_y2)(uint8_t *block, const uint8_t *pixels, int line_size, int h){
    DEF(put_pixels8_y2)(block  , pixels  , line_size, h);
    DEF(put_pixels8_y2)(block+8, pixels+8, line_size, h);
}
static void DEF(put_no_rnd_pixels16_y2)(uint8_t *block, const uint8_t *pixels, int line_size, int h){
    DEF(put_no_rnd_pixels8_y2)(block  , pixels  , line_size, h);
    DEF(put_no_rnd_pixels8_y2)(block+8, pixels+8, line_size, h);
}
static void DEF(avg_pixels16)(uint8_t *block, const uint8_t *pixels, int line_size, int h){
    DEF(avg_pixels8)(block  , pixels  , line_size, h);
    DEF(avg_pixels8)(block+8, pixels+8, line_size, h);
}
static void DEF(avg_pixels16_x2)(uint8_t *block, const uint8_t *pixels, int line_size, int h){
    DEF(avg_pixels8_x2)(block  , pixels  , line_size, h);
    DEF(avg_pixels8_x2)(block+8, pixels+8, line_size, h);
}
static void DEF(avg_pixels16_y2)(uint8_t *block, const uint8_t *pixels, int line_size, int h){
    DEF(avg_pixels8_y2)(block  , pixels  , line_size, h);
    DEF(avg_pixels8_y2)(block+8, pixels+8, line_size, h);
}
static void DEF(avg_pixels16_xy2)(uint8_t *block, const uint8_t *pixels, int line_size, int h){
    DEF(avg_pixels8_xy2)(block  , pixels  , line_size, h);
    DEF(avg_pixels8_xy2)(block+8, pixels+8, line_size, h);
}

#define QPEL_2TAP_L3(OPNAME) \
static void DEF(OPNAME ## 2tap_qpel16_l3)(uint8_t *dst, uint8_t *src, int stride, int h, int off1, int off2){\
    asm volatile(\
        "1:                    \n\t"\
        "movq   (%1,%2), %%mm0 \n\t"\
        "movq  8(%1,%2), %%mm1 \n\t"\
        PAVGB"  (%1,%3), %%mm0 \n\t"\
        PAVGB" 8(%1,%3), %%mm1 \n\t"\
        PAVGB"  (%1),    %%mm0 \n\t"\
        PAVGB" 8(%1),    %%mm1 \n\t"\
        STORE_OP( (%1,%4),%%mm0)\
        STORE_OP(8(%1,%4),%%mm1)\
        "movq  %%mm0,  (%1,%4) \n\t"\
        "movq  %%mm1, 8(%1,%4) \n\t"\
        "add   %5, %1          \n\t"\
        "decl  %0              \n\t"\
        "jnz   1b              \n\t"\
        :"+g"(h), "+r"(src)\
        :"r"((x86_reg)off1), "r"((x86_reg)off2),\
         "r"((x86_reg)(dst-src)), "r"((x86_reg)stride)\
        :"memory"\
    );\
}\
static void DEF(OPNAME ## 2tap_qpel8_l3)(uint8_t *dst, uint8_t *src, int stride, int h, int off1, int off2){\
    asm volatile(\
        "1:                    \n\t"\
        "movq   (%1,%2), %%mm0 \n\t"\
        PAVGB"  (%1,%3), %%mm0 \n\t"\
        PAVGB"  (%1),    %%mm0 \n\t"\
        STORE_OP((%1,%4),%%mm0)\
        "movq  %%mm0,  (%1,%4) \n\t"\
        "add   %5, %1          \n\t"\
        "decl  %0              \n\t"\
        "jnz   1b              \n\t"\
        :"+g"(h), "+r"(src)\
        :"r"((x86_reg)off1), "r"((x86_reg)off2),\
         "r"((x86_reg)(dst-src)), "r"((x86_reg)stride)\
        :"memory"\
    );\
}

#define STORE_OP(a,b) PAVGB" "#a","#b" \n\t"
QPEL_2TAP_L3(avg_)
#undef STORE_OP
#define STORE_OP(a,b)
QPEL_2TAP_L3(put_)
#undef STORE_OP
#undef QPEL_2TAP_L3