494 lines
		
	
	
		
			19 KiB
		
	
	
	
		
			C
		
	
	
	
	
	
			
		
		
	
	
			494 lines
		
	
	
		
			19 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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| 
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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 "constants.h"
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| #include "dsputil_x86.h"
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| #include "inline_asm.h"
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| 
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| #if HAVE_INLINE_ASM
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| 
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| void ff_put_pixels_clamped_mmx(const int16_t *block, uint8_t *pixels,
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|                                int line_size)
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| {
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|     const int16_t *p;
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|     uint8_t *pix;
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| 
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|     /* read the pixels */
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|     p   = block;
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|     pix = pixels;
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|     /* unrolled loop */
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|     __asm__ volatile (
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|         "movq      (%3), %%mm0          \n\t"
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|         "movq     8(%3), %%mm1          \n\t"
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|         "movq    16(%3), %%mm2          \n\t"
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|         "movq    24(%3), %%mm3          \n\t"
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|         "movq    32(%3), %%mm4          \n\t"
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|         "movq    40(%3), %%mm5          \n\t"
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|         "movq    48(%3), %%mm6          \n\t"
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|         "movq    56(%3), %%mm7          \n\t"
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|         "packuswb %%mm1, %%mm0          \n\t"
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|         "packuswb %%mm3, %%mm2          \n\t"
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|         "packuswb %%mm5, %%mm4          \n\t"
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|         "packuswb %%mm7, %%mm6          \n\t"
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|         "movq     %%mm0, (%0)           \n\t"
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|         "movq     %%mm2, (%0, %1)       \n\t"
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|         "movq     %%mm4, (%0, %1, 2)    \n\t"
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|         "movq     %%mm6, (%0, %2)       \n\t"
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|         :: "r" (pix), "r" ((x86_reg) line_size), "r" ((x86_reg) line_size * 3),
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|            "r" (p)
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|         : "memory");
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|     pix += line_size * 4;
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|     p   += 32;
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| 
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|     // if here would be an exact copy of the code above
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|     // compiler would generate some very strange code
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|     // thus using "r"
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|     __asm__ volatile (
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|         "movq       (%3), %%mm0         \n\t"
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|         "movq      8(%3), %%mm1         \n\t"
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|         "movq     16(%3), %%mm2         \n\t"
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|         "movq     24(%3), %%mm3         \n\t"
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|         "movq     32(%3), %%mm4         \n\t"
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|         "movq     40(%3), %%mm5         \n\t"
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|         "movq     48(%3), %%mm6         \n\t"
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|         "movq     56(%3), %%mm7         \n\t"
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|         "packuswb  %%mm1, %%mm0         \n\t"
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|         "packuswb  %%mm3, %%mm2         \n\t"
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|         "packuswb  %%mm5, %%mm4         \n\t"
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|         "packuswb  %%mm7, %%mm6         \n\t"
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|         "movq      %%mm0, (%0)          \n\t"
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|         "movq      %%mm2, (%0, %1)      \n\t"
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|         "movq      %%mm4, (%0, %1, 2)   \n\t"
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|         "movq      %%mm6, (%0, %2)      \n\t"
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|         :: "r" (pix), "r" ((x86_reg) line_size), "r" ((x86_reg) line_size * 3),
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|            "r" (p)
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|         : "memory");
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| }
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| 
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| #define put_signed_pixels_clamped_mmx_half(off)             \
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|     "movq          "#off"(%2), %%mm1        \n\t"           \
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|     "movq     16 + "#off"(%2), %%mm2        \n\t"           \
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|     "movq     32 + "#off"(%2), %%mm3        \n\t"           \
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|     "movq     48 + "#off"(%2), %%mm4        \n\t"           \
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|     "packsswb  8 + "#off"(%2), %%mm1        \n\t"           \
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|     "packsswb 24 + "#off"(%2), %%mm2        \n\t"           \
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|     "packsswb 40 + "#off"(%2), %%mm3        \n\t"           \
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|     "packsswb 56 + "#off"(%2), %%mm4        \n\t"           \
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|     "paddb              %%mm0, %%mm1        \n\t"           \
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|     "paddb              %%mm0, %%mm2        \n\t"           \
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|     "paddb              %%mm0, %%mm3        \n\t"           \
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|     "paddb              %%mm0, %%mm4        \n\t"           \
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|     "movq               %%mm1, (%0)         \n\t"           \
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|     "movq               %%mm2, (%0, %3)     \n\t"           \
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|     "movq               %%mm3, (%0, %3, 2)  \n\t"           \
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|     "movq               %%mm4, (%0, %1)     \n\t"
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| 
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| void ff_put_signed_pixels_clamped_mmx(const int16_t *block, uint8_t *pixels,
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|                                       int line_size)
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| {
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|     x86_reg line_skip = line_size;
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|     x86_reg line_skip3;
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| 
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|     __asm__ volatile (
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|         "movq "MANGLE(ff_pb_80)", %%mm0     \n\t"
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|         "lea         (%3, %3, 2), %1        \n\t"
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|         put_signed_pixels_clamped_mmx_half(0)
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|         "lea         (%0, %3, 4), %0        \n\t"
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|         put_signed_pixels_clamped_mmx_half(64)
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|         : "+&r" (pixels), "=&r" (line_skip3)
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|         : "r" (block), "r" (line_skip)
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|         : "memory");
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| }
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| 
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| void ff_add_pixels_clamped_mmx(const int16_t *block, uint8_t *pixels,
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|                                int line_size)
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| {
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|     const int16_t *p;
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|     uint8_t *pix;
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|     int i;
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| 
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|     /* read the pixels */
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|     p   = block;
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|     pix = pixels;
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|     MOVQ_ZERO(mm7);
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|     i = 4;
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|     do {
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|         __asm__ volatile (
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|             "movq        (%2), %%mm0    \n\t"
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|             "movq       8(%2), %%mm1    \n\t"
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|             "movq      16(%2), %%mm2    \n\t"
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|             "movq      24(%2), %%mm3    \n\t"
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|             "movq          %0, %%mm4    \n\t"
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|             "movq          %1, %%mm6    \n\t"
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|             "movq       %%mm4, %%mm5    \n\t"
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|             "punpcklbw  %%mm7, %%mm4    \n\t"
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|             "punpckhbw  %%mm7, %%mm5    \n\t"
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|             "paddsw     %%mm4, %%mm0    \n\t"
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|             "paddsw     %%mm5, %%mm1    \n\t"
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|             "movq       %%mm6, %%mm5    \n\t"
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|             "punpcklbw  %%mm7, %%mm6    \n\t"
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|             "punpckhbw  %%mm7, %%mm5    \n\t"
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|             "paddsw     %%mm6, %%mm2    \n\t"
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|             "paddsw     %%mm5, %%mm3    \n\t"
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|             "packuswb   %%mm1, %%mm0    \n\t"
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|             "packuswb   %%mm3, %%mm2    \n\t"
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|             "movq       %%mm0, %0       \n\t"
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|             "movq       %%mm2, %1       \n\t"
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|             : "+m" (*pix), "+m" (*(pix + line_size))
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|             : "r" (p)
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|             : "memory");
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|         pix += line_size * 2;
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|         p   += 16;
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|     } while (--i);
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| }
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| 
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| #define CLEAR_BLOCKS(name, n)                           \
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| void name(int16_t *blocks)                              \
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| {                                                       \
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|     __asm__ volatile (                                  \
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|         "pxor %%mm7, %%mm7              \n\t"           \
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|         "mov     %1,        %%"REG_a"   \n\t"           \
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|         "1:                             \n\t"           \
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|         "movq %%mm7,   (%0, %%"REG_a")  \n\t"           \
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|         "movq %%mm7,  8(%0, %%"REG_a")  \n\t"           \
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|         "movq %%mm7, 16(%0, %%"REG_a")  \n\t"           \
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|         "movq %%mm7, 24(%0, %%"REG_a")  \n\t"           \
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|         "add    $32, %%"REG_a"          \n\t"           \
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|         "js      1b                     \n\t"           \
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|         :: "r"(((uint8_t *) blocks) + 128 * n),         \
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|            "i"(-128 * n)                                \
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|         : "%"REG_a);                                    \
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| }
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| CLEAR_BLOCKS(ff_clear_blocks_mmx, 6)
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| CLEAR_BLOCKS(ff_clear_block_mmx, 1)
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| 
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| void ff_clear_block_sse(int16_t *block)
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| {
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|     __asm__ volatile (
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|         "xorps  %%xmm0, %%xmm0          \n"
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|         "movaps %%xmm0,    (%0)         \n"
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|         "movaps %%xmm0,  16(%0)         \n"
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|         "movaps %%xmm0,  32(%0)         \n"
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|         "movaps %%xmm0,  48(%0)         \n"
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|         "movaps %%xmm0,  64(%0)         \n"
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|         "movaps %%xmm0,  80(%0)         \n"
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|         "movaps %%xmm0,  96(%0)         \n"
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|         "movaps %%xmm0, 112(%0)         \n"
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|         :: "r" (block)
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|         : "memory");
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| }
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| 
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| void ff_clear_blocks_sse(int16_t *blocks)
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| {
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|     __asm__ volatile (
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|         "xorps  %%xmm0, %%xmm0              \n"
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|         "mov        %1,         %%"REG_a"   \n"
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|         "1:                                 \n"
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|         "movaps %%xmm0,    (%0, %%"REG_a")  \n"
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|         "movaps %%xmm0,  16(%0, %%"REG_a")  \n"
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|         "movaps %%xmm0,  32(%0, %%"REG_a")  \n"
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|         "movaps %%xmm0,  48(%0, %%"REG_a")  \n"
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|         "movaps %%xmm0,  64(%0, %%"REG_a")  \n"
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|         "movaps %%xmm0,  80(%0, %%"REG_a")  \n"
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|         "movaps %%xmm0,  96(%0, %%"REG_a")  \n"
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|         "movaps %%xmm0, 112(%0, %%"REG_a")  \n"
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|         "add      $128,         %%"REG_a"   \n"
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|         "js         1b                      \n"
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|         :: "r"(((uint8_t *) blocks) + 128 * 6), "i"(-128 * 6)
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|         : "%"REG_a);
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| }
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| 
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| void ff_add_bytes_mmx(uint8_t *dst, uint8_t *src, int w)
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| {
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|     x86_reg i = 0;
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| 
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|     __asm__ volatile (
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|         "jmp          2f                \n\t"
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|         "1:                             \n\t"
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|         "movq   (%1, %0), %%mm0         \n\t"
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|         "movq   (%2, %0), %%mm1         \n\t"
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|         "paddb     %%mm0, %%mm1         \n\t"
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|         "movq      %%mm1, (%2, %0)      \n\t"
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|         "movq  8(%1, %0), %%mm0         \n\t"
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|         "movq  8(%2, %0), %%mm1         \n\t"
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|         "paddb     %%mm0, %%mm1         \n\t"
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|         "movq      %%mm1, 8(%2, %0)     \n\t"
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|         "add         $16, %0            \n\t"
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|         "2:                             \n\t"
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|         "cmp          %3, %0            \n\t"
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|         "js           1b                \n\t"
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|         : "+r" (i)
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|         : "r" (src), "r" (dst), "r" ((x86_reg) w - 15));
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| 
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|     for (; i < w; i++)
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|         dst[i + 0] += src[i + 0];
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| }
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| 
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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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| 
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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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| 
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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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| 
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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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| 
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| void ff_gmc_mmx(uint8_t *dst, uint8_t *src,
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|                 int stride, int h, int ox, int oy,
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|                 int dxx, int dxy, int dyx, int dyy,
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|                 int shift, int r, int width, int height)
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| {
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|     const int w    = 8;
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|     const int ix   = ox  >> (16 + shift);
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|     const int iy   = oy  >> (16 + shift);
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|     const int oxs  = ox  >> 4;
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|     const int oys  = oy  >> 4;
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|     const int dxxs = dxx >> 4;
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|     const int dxys = dxy >> 4;
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|     const int dyxs = dyx >> 4;
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|     const int dyys = dyy >> 4;
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|     const uint16_t r4[4]   = { r, r, r, r };
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|     const uint16_t dxy4[4] = { dxys, dxys, dxys, dxys };
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|     const uint16_t dyy4[4] = { dyys, dyys, dyys, dyys };
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|     const uint64_t shift2  = 2 * shift;
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|     int x, y;
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| 
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|     const int dxw = (dxx - (1 << (16 + shift))) * (w - 1);
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|     const int dyh = (dyy - (1 << (16 + shift))) * (h - 1);
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|     const int dxh = dxy * (h - 1);
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|     const int dyw = dyx * (w - 1);
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| 
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|     if ( // non-constant fullpel offset (3% of blocks)
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|         ((ox ^ (ox + dxw)) | (ox ^ (ox + dxh)) | (ox ^ (ox + dxw + dxh)) |
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|          (oy ^ (oy + dyw)) | (oy ^ (oy + dyh)) | (oy ^ (oy + dyw + dyh))) >> (16 + shift) ||
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|         // uses more than 16 bits of subpel mv (only at huge resolution)
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|         (dxx | dxy | dyx | dyy) & 15 ||
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|         (unsigned) ix >= width  - w ||
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|         (unsigned) iy >= height - h) {
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|         // FIXME could still use mmx for some of the rows
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|         ff_gmc_c(dst, src, stride, h, ox, oy, dxx, dxy, dyx, dyy,
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|                  shift, r, width, height);
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|         return;
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|     }
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| 
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|     src += ix + iy * stride;
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| 
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|     __asm__ volatile (
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|         "movd         %0, %%mm6         \n\t"
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|         "pxor      %%mm7, %%mm7         \n\t"
 | |
|         "punpcklwd %%mm6, %%mm6         \n\t"
 | |
|         "punpcklwd %%mm6, %%mm6         \n\t"
 | |
|         :: "r" (1 << shift));
 | |
| 
 | |
|     for (x = 0; x < w; x += 4) {
 | |
|         uint16_t dx4[4] = { oxs - dxys + dxxs * (x + 0),
 | |
|                             oxs - dxys + dxxs * (x + 1),
 | |
|                             oxs - dxys + dxxs * (x + 2),
 | |
|                             oxs - dxys + dxxs * (x + 3) };
 | |
|         uint16_t dy4[4] = { oys - dyys + dyxs * (x + 0),
 | |
|                             oys - dyys + dyxs * (x + 1),
 | |
|                             oys - dyys + dyxs * (x + 2),
 | |
|                             oys - dyys + dyxs * (x + 3) };
 | |
| 
 | |
|         for (y = 0; y < h; y++) {
 | |
|             __asm__ volatile (
 | |
|                 "movq      %0, %%mm4    \n\t"
 | |
|                 "movq      %1, %%mm5    \n\t"
 | |
|                 "paddw     %2, %%mm4    \n\t"
 | |
|                 "paddw     %3, %%mm5    \n\t"
 | |
|                 "movq   %%mm4, %0       \n\t"
 | |
|                 "movq   %%mm5, %1       \n\t"
 | |
|                 "psrlw    $12, %%mm4    \n\t"
 | |
|                 "psrlw    $12, %%mm5    \n\t"
 | |
|                 : "+m" (*dx4), "+m" (*dy4)
 | |
|                 : "m" (*dxy4), "m" (*dyy4));
 | |
| 
 | |
|             __asm__ volatile (
 | |
|                 "movq      %%mm6, %%mm2 \n\t"
 | |
|                 "movq      %%mm6, %%mm1 \n\t"
 | |
|                 "psubw     %%mm4, %%mm2 \n\t"
 | |
|                 "psubw     %%mm5, %%mm1 \n\t"
 | |
|                 "movq      %%mm2, %%mm0 \n\t"
 | |
|                 "movq      %%mm4, %%mm3 \n\t"
 | |
|                 "pmullw    %%mm1, %%mm0 \n\t" // (s - dx) * (s - dy)
 | |
|                 "pmullw    %%mm5, %%mm3 \n\t" // dx * dy
 | |
|                 "pmullw    %%mm5, %%mm2 \n\t" // (s - dx) * dy
 | |
|                 "pmullw    %%mm4, %%mm1 \n\t" // dx * (s - dy)
 | |
| 
 | |
|                 "movd         %4, %%mm5 \n\t"
 | |
|                 "movd         %3, %%mm4 \n\t"
 | |
|                 "punpcklbw %%mm7, %%mm5 \n\t"
 | |
|                 "punpcklbw %%mm7, %%mm4 \n\t"
 | |
|                 "pmullw    %%mm5, %%mm3 \n\t" // src[1, 1] * dx * dy
 | |
|                 "pmullw    %%mm4, %%mm2 \n\t" // src[0, 1] * (s - dx) * dy
 | |
| 
 | |
|                 "movd         %2, %%mm5 \n\t"
 | |
|                 "movd         %1, %%mm4 \n\t"
 | |
|                 "punpcklbw %%mm7, %%mm5 \n\t"
 | |
|                 "punpcklbw %%mm7, %%mm4 \n\t"
 | |
|                 "pmullw    %%mm5, %%mm1 \n\t" // src[1, 0] * dx * (s - dy)
 | |
|                 "pmullw    %%mm4, %%mm0 \n\t" // src[0, 0] * (s - dx) * (s - dy)
 | |
|                 "paddw        %5, %%mm1 \n\t"
 | |
|                 "paddw     %%mm3, %%mm2 \n\t"
 | |
|                 "paddw     %%mm1, %%mm0 \n\t"
 | |
|                 "paddw     %%mm2, %%mm0 \n\t"
 | |
| 
 | |
|                 "psrlw        %6, %%mm0 \n\t"
 | |
|                 "packuswb  %%mm0, %%mm0 \n\t"
 | |
|                 "movd      %%mm0, %0    \n\t"
 | |
| 
 | |
|                 : "=m" (dst[x + y * stride])
 | |
|                 : "m" (src[0]), "m" (src[1]),
 | |
|                   "m" (src[stride]), "m" (src[stride + 1]),
 | |
|                   "m" (*r4), "m" (shift2));
 | |
|             src += stride;
 | |
|         }
 | |
|         src += 4 - h * stride;
 | |
|     }
 | |
| }
 | |
| 
 | |
| void ff_vector_clipf_sse(float *dst, const float *src,
 | |
|                          float min, float max, int len)
 | |
| {
 | |
|     x86_reg i = (len - 16) * 4;
 | |
|     __asm__ volatile (
 | |
|         "movss          %3, %%xmm4      \n\t"
 | |
|         "movss          %4, %%xmm5      \n\t"
 | |
|         "shufps $0, %%xmm4, %%xmm4      \n\t"
 | |
|         "shufps $0, %%xmm5, %%xmm5      \n\t"
 | |
|         "1:                             \n\t"
 | |
|         "movaps   (%2, %0), %%xmm0      \n\t" // 3/1 on intel
 | |
|         "movaps 16(%2, %0), %%xmm1      \n\t"
 | |
|         "movaps 32(%2, %0), %%xmm2      \n\t"
 | |
|         "movaps 48(%2, %0), %%xmm3      \n\t"
 | |
|         "maxps      %%xmm4, %%xmm0      \n\t"
 | |
|         "maxps      %%xmm4, %%xmm1      \n\t"
 | |
|         "maxps      %%xmm4, %%xmm2      \n\t"
 | |
|         "maxps      %%xmm4, %%xmm3      \n\t"
 | |
|         "minps      %%xmm5, %%xmm0      \n\t"
 | |
|         "minps      %%xmm5, %%xmm1      \n\t"
 | |
|         "minps      %%xmm5, %%xmm2      \n\t"
 | |
|         "minps      %%xmm5, %%xmm3      \n\t"
 | |
|         "movaps     %%xmm0,   (%1, %0)  \n\t"
 | |
|         "movaps     %%xmm1, 16(%1, %0)  \n\t"
 | |
|         "movaps     %%xmm2, 32(%1, %0)  \n\t"
 | |
|         "movaps     %%xmm3, 48(%1, %0)  \n\t"
 | |
|         "sub           $64, %0          \n\t"
 | |
|         "jge            1b              \n\t"
 | |
|         : "+&r" (i)
 | |
|         : "r" (dst), "r" (src), "m" (min), "m" (max)
 | |
|         : "memory");
 | |
| }
 | |
| 
 | |
| #endif /* HAVE_INLINE_ASM */
 |