FFmpeg/libavcodec/i386/dsputil_mmx_rnd.h

/*
 * DSP utils mmx functions are compiled twice for rnd/no_rnd
 * Copyright (c) 2000, 2001 Fabrice Bellard.
 *
 * This library 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 of the License, or (at your option) any later version.
 *
 * This library 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 this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * 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>
 */

// put_pixels
static void DEF(put, pixels_x2)(UINT8 *block, const UINT8 *pixels, int line_size, int h)
{
    MOVQ_BFE(mm6);
    __asm __volatile(
	"lea	(%3, %3), %%eax		\n\t"
	".balign 8			\n\t"
	"1:				\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"
	PAVGBP(%%mm0, %%mm1, %%mm4,   %%mm2, %%mm3, %%mm5)
	"movq	%%mm4, (%2)		\n\t"
	"movq	%%mm5, (%2, %3)		\n\t"
	"addl	%%eax, %1		\n\t"
	"addl	%%eax, %2		\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"
	PAVGBP(%%mm0, %%mm1, %%mm4,   %%mm2, %%mm3, %%mm5)
	"movq	%%mm4, (%2)		\n\t"
	"movq	%%mm5, (%2, %3)		\n\t"
	"addl	%%eax, %1		\n\t"
	"addl	%%eax, %2		\n\t"
	"subl	$4, %0			\n\t"
	"jnz	1b			\n\t"
	:"+g"(h), "+S"(pixels), "+D"(block)
	:"r"(line_size)
	:"eax", "memory");
}

static void DEF(put, pixels_y2)(UINT8 *block, const UINT8 *pixels, int line_size, int h)
{
    MOVQ_BFE(mm6);
    __asm __volatile(
	"lea (%3, %3), %%eax		\n\t"
	"movq (%1), %%mm0		\n\t"
	".balign 8			\n\t"
	"1:				\n\t"
	"movq	(%1, %3), %%mm1		\n\t"
	"movq	(%1, %%eax),%%mm2	\n\t"
	PAVGBP(%%mm1, %%mm0, %%mm4,   %%mm2, %%mm1, %%mm5)
        "movq	%%mm4, (%2)		\n\t"
        "movq	%%mm5, (%2, %3)		\n\t"
	"addl	%%eax, %1		\n\t"
	"addl	%%eax, %2		\n\t"
	"movq	(%1, %3), %%mm1		\n\t"
	"movq	(%1, %%eax),%%mm0	\n\t"
	PAVGBP(%%mm1, %%mm2, %%mm4,   %%mm0, %%mm1, %%mm5)
	"movq	%%mm4, (%2)		\n\t"
	"movq	%%mm5, (%2, %3)		\n\t"
	"addl	%%eax, %1		\n\t"
	"addl	%%eax, %2		\n\t"
	"subl	$4, %0			\n\t"
	"jnz	1b			\n\t"
	:"+g"(h), "+S"(pixels), "+D"(block)
	:"r"(line_size)
	:"eax", "memory");
}

static void DEF(put, pixels_xy2)(UINT8 *block, const UINT8 *pixels, int 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"
	"xorl	%%eax, %%eax		\n\t"
	"addl	%3, %1			\n\t"
	".balign 4			\n\t"
	"1:				\n\t"
	"movq	(%1, %%eax), %%mm0	\n\t"
	"movq	1(%1, %%eax), %%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, %%eax)	\n\t"
	"addl	%3, %%eax		\n\t"

	"movq	(%1, %%eax), %%mm2	\n\t" // 0 <-> 2   1 <-> 3
	"movq	1(%1, %%eax), %%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, %%eax)	\n\t"
	"addl	%3, %%eax		\n\t"

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

// avg_pixels