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/*
* MMX optimized DSP utils
* Copyright (c) 2000, 2001 Fabrice Bellard
* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
*
* MMX optimization by Nick Kurshev <nickols_k@mail.ru>
*
* 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 "config.h"
#include "libavutil/cpu.h"
#include "libavutil/x86/asm.h"
#include "dsputil_x86.h"
#include "inline_asm.h"
#if HAVE_INLINE_ASM
/* Draw the edges of width 'w' of an image of size width, height
* this MMX version can only handle w == 8 || w == 16. */
void ff_draw_edges_mmx(uint8_t *buf, int wrap, int width, int height,
int w, int h, int sides)
{
uint8_t *ptr, *last_line;
int i;
last_line = buf + (height - 1) * wrap;
/* left and right */
ptr = buf;
if (w == 8) {
__asm__ volatile (
"1: \n\t"
"movd (%0), %%mm0 \n\t"
"punpcklbw %%mm0, %%mm0 \n\t"
"punpcklwd %%mm0, %%mm0 \n\t"
"punpckldq %%mm0, %%mm0 \n\t"
"movq %%mm0, -8(%0) \n\t"
"movq -8(%0, %2), %%mm1 \n\t"
"punpckhbw %%mm1, %%mm1 \n\t"
"punpckhwd %%mm1, %%mm1 \n\t"
"punpckhdq %%mm1, %%mm1 \n\t"
"movq %%mm1, (%0, %2) \n\t"
"add %1, %0 \n\t"
"cmp %3, %0 \n\t"
"jb 1b \n\t"
: "+r" (ptr)
: "r" ((x86_reg) wrap), "r" ((x86_reg) width),
"r" (ptr + wrap * height));
} else {
__asm__ volatile (
"1: \n\t"
"movd (%0), %%mm0 \n\t"
"punpcklbw %%mm0, %%mm0 \n\t"
"punpcklwd %%mm0, %%mm0 \n\t"
"punpckldq %%mm0, %%mm0 \n\t"
"movq %%mm0, -8(%0) \n\t"
"movq %%mm0, -16(%0) \n\t"
"movq -8(%0, %2), %%mm1 \n\t"
"punpckhbw %%mm1, %%mm1 \n\t"
"punpckhwd %%mm1, %%mm1 \n\t"
"punpckhdq %%mm1, %%mm1 \n\t"
"movq %%mm1, (%0, %2) \n\t"
"movq %%mm1, 8(%0, %2) \n\t"
"add %1, %0 \n\t"
"cmp %3, %0 \n\t"
"jb 1b \n\t"
: "+r" (ptr)
: "r" ((x86_reg) wrap), "r" ((x86_reg) width),
"r" (ptr + wrap * height));
}
/* top and bottom (and hopefully also the corners) */
if (sides & EDGE_TOP) {
for (i = 0; i < h; i += 4) {
ptr = buf - (i + 1) * wrap - w;
__asm__ volatile (
"1: \n\t"
"movq (%1, %0), %%mm0 \n\t"
"movq %%mm0, (%0) \n\t"
"movq %%mm0, (%0, %2) \n\t"
"movq %%mm0, (%0, %2, 2) \n\t"
"movq %%mm0, (%0, %3) \n\t"
"add $8, %0 \n\t"
"cmp %4, %0 \n\t"
"jb 1b \n\t"
: "+r" (ptr)
: "r" ((x86_reg) buf - (x86_reg) ptr - w),
"r" ((x86_reg) - wrap), "r" ((x86_reg) - wrap * 3),
"r" (ptr + width + 2 * w));
}
}
if (sides & EDGE_BOTTOM) {
for (i = 0; i < h; i += 4) {
ptr = last_line + (i + 1) * wrap - w;
__asm__ volatile (
"1: \n\t"
"movq (%1, %0), %%mm0 \n\t"
"movq %%mm0, (%0) \n\t"
"movq %%mm0, (%0, %2) \n\t"
"movq %%mm0, (%0, %2, 2) \n\t"
"movq %%mm0, (%0, %3) \n\t"
"add $8, %0 \n\t"
"cmp %4, %0 \n\t"
"jb 1b \n\t"
: "+r" (ptr)
: "r" ((x86_reg) last_line - (x86_reg) ptr - w),
"r" ((x86_reg) wrap), "r" ((x86_reg) wrap * 3),
"r" (ptr + width + 2 * w));
}
}
}
#endif /* HAVE_INLINE_ASM */
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