mirror of
https://git.ffmpeg.org/ffmpeg.git
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129 lines
5.1 KiB
C
129 lines
5.1 KiB
C
/*
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* MMX optimized DSP utils
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* Copyright (c) 2000, 2001 Fabrice Bellard
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* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
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*
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* MMX optimization by Nick Kurshev <nickols_k@mail.ru>
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "config.h"
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#include "libavutil/cpu.h"
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#include "libavutil/x86/asm.h"
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#include "dsputil_x86.h"
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#include "inline_asm.h"
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#if HAVE_INLINE_ASM
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/* Draw the edges of width 'w' of an image of size width, height
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* this MMX version can only handle w == 8 || w == 16. */
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void ff_draw_edges_mmx(uint8_t *buf, int wrap, int width, int height,
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int w, int h, int sides)
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{
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uint8_t *ptr, *last_line;
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int i;
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last_line = buf + (height - 1) * wrap;
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/* left and right */
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ptr = buf;
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if (w == 8) {
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__asm__ volatile (
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"1: \n\t"
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"movd (%0), %%mm0 \n\t"
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"punpcklbw %%mm0, %%mm0 \n\t"
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"punpcklwd %%mm0, %%mm0 \n\t"
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"punpckldq %%mm0, %%mm0 \n\t"
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"movq %%mm0, -8(%0) \n\t"
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"movq -8(%0, %2), %%mm1 \n\t"
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"punpckhbw %%mm1, %%mm1 \n\t"
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"punpckhwd %%mm1, %%mm1 \n\t"
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"punpckhdq %%mm1, %%mm1 \n\t"
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"movq %%mm1, (%0, %2) \n\t"
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"add %1, %0 \n\t"
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"cmp %3, %0 \n\t"
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"jb 1b \n\t"
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: "+r" (ptr)
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: "r" ((x86_reg) wrap), "r" ((x86_reg) width),
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"r" (ptr + wrap * height));
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} else {
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__asm__ volatile (
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"1: \n\t"
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"movd (%0), %%mm0 \n\t"
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"punpcklbw %%mm0, %%mm0 \n\t"
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"punpcklwd %%mm0, %%mm0 \n\t"
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"punpckldq %%mm0, %%mm0 \n\t"
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"movq %%mm0, -8(%0) \n\t"
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"movq %%mm0, -16(%0) \n\t"
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"movq -8(%0, %2), %%mm1 \n\t"
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"punpckhbw %%mm1, %%mm1 \n\t"
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"punpckhwd %%mm1, %%mm1 \n\t"
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"punpckhdq %%mm1, %%mm1 \n\t"
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"movq %%mm1, (%0, %2) \n\t"
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"movq %%mm1, 8(%0, %2) \n\t"
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"add %1, %0 \n\t"
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"cmp %3, %0 \n\t"
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"jb 1b \n\t"
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: "+r" (ptr)
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: "r" ((x86_reg) wrap), "r" ((x86_reg) width),
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"r" (ptr + wrap * height));
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}
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/* top and bottom (and hopefully also the corners) */
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if (sides & EDGE_TOP) {
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for (i = 0; i < h; i += 4) {
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ptr = buf - (i + 1) * wrap - w;
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__asm__ volatile (
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"1: \n\t"
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"movq (%1, %0), %%mm0 \n\t"
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"movq %%mm0, (%0) \n\t"
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"movq %%mm0, (%0, %2) \n\t"
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"movq %%mm0, (%0, %2, 2) \n\t"
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"movq %%mm0, (%0, %3) \n\t"
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"add $8, %0 \n\t"
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"cmp %4, %0 \n\t"
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"jb 1b \n\t"
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: "+r" (ptr)
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: "r" ((x86_reg) buf - (x86_reg) ptr - w),
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"r" ((x86_reg) - wrap), "r" ((x86_reg) - wrap * 3),
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"r" (ptr + width + 2 * w));
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}
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}
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if (sides & EDGE_BOTTOM) {
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for (i = 0; i < h; i += 4) {
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ptr = last_line + (i + 1) * wrap - w;
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__asm__ volatile (
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"1: \n\t"
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"movq (%1, %0), %%mm0 \n\t"
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"movq %%mm0, (%0) \n\t"
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"movq %%mm0, (%0, %2) \n\t"
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"movq %%mm0, (%0, %2, 2) \n\t"
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"movq %%mm0, (%0, %3) \n\t"
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"add $8, %0 \n\t"
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"cmp %4, %0 \n\t"
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"jb 1b \n\t"
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: "+r" (ptr)
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: "r" ((x86_reg) last_line - (x86_reg) ptr - w),
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"r" ((x86_reg) wrap), "r" ((x86_reg) wrap * 3),
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"r" (ptr + width + 2 * w));
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}
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}
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}
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#endif /* HAVE_INLINE_ASM */
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