src/third_party/libvpx/vp8/common/mips/dspr2/reconinter_dspr2.c

/*
 *  Copyright (c) 2012 The WebM project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
 *  in the file PATENTS.  All contributing project authors may
 *  be found in the AUTHORS file in the root of the source tree.
 */


#include "vpx_config.h"
#include "vp8_rtcd.h"
#include "vpx/vpx_integer.h"

#if HAVE_DSPR2
inline void prefetch_load_int(unsigned char *src)
{
    __asm__ __volatile__ (
        "pref   0,  0(%[src])   \n\t"
        :
        : [src] "r" (src)
    );
}


__inline void vp8_copy_mem16x16_dspr2(
    unsigned char *RESTRICT src,
    int src_stride,
    unsigned char *RESTRICT dst,
    int dst_stride)
{
    int r;
    unsigned int a0, a1, a2, a3;

    for (r = 16; r--;)
    {
        /* load src data in cache memory */
        prefetch_load_int(src + src_stride);

        /* use unaligned memory load and store */
        __asm__ __volatile__ (
            "ulw    %[a0], 0(%[src])            \n\t"
            "ulw    %[a1], 4(%[src])            \n\t"
            "ulw    %[a2], 8(%[src])            \n\t"
            "ulw    %[a3], 12(%[src])           \n\t"
            "sw     %[a0], 0(%[dst])            \n\t"
            "sw     %[a1], 4(%[dst])            \n\t"
            "sw     %[a2], 8(%[dst])            \n\t"
            "sw     %[a3], 12(%[dst])           \n\t"
            : [a0] "=&r" (a0), [a1] "=&r" (a1),
              [a2] "=&r" (a2), [a3] "=&r" (a3)
            : [src] "r" (src), [dst] "r" (dst)
        );

        src += src_stride;
        dst += dst_stride;
    }
}


__inline void vp8_copy_mem8x8_dspr2(
    unsigned char *RESTRICT src,
    int src_stride,
    unsigned char *RESTRICT dst,
    int dst_stride)
{
    int r;
    unsigned int a0, a1;

    /* load src data in cache memory */
    prefetch_load_int(src + src_stride);

    for (r = 8; r--;)
    {
        /* use unaligned memory load and store */
        __asm__ __volatile__ (
            "ulw    %[a0], 0(%[src])            \n\t"
            "ulw    %[a1], 4(%[src])            \n\t"
            "sw     %[a0], 0(%[dst])            \n\t"
            "sw     %[a1], 4(%[dst])            \n\t"
            : [a0] "=&r" (a0), [a1] "=&r" (a1)
            : [src] "r" (src), [dst] "r" (dst)
        );

        src += src_stride;
        dst += dst_stride;
    }
}


__inline void vp8_copy_mem8x4_dspr2(
    unsigned char *RESTRICT src,
    int src_stride,
    unsigned char *RESTRICT dst,
    int dst_stride)
{
    int r;
    unsigned int a0, a1;

    /* load src data in cache memory */
    prefetch_load_int(src + src_stride);

    for (r = 4; r--;)
    {
        /* use unaligned memory load and store */
        __asm__ __volatile__ (
            "ulw    %[a0], 0(%[src])            \n\t"
            "ulw    %[a1], 4(%[src])            \n\t"
            "sw     %[a0], 0(%[dst])            \n\t"
            "sw     %[a1], 4(%[dst])            \n\t"
           : [a0] "=&r" (a0), [a1] "=&r" (a1)
           : [src] "r" (src), [dst] "r" (dst)
        );

        src += src_stride;
        dst += dst_stride;
    }
}

#endif