Add file missing in r24702

Originally committed as revision 24703 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/x86/h264_weight_sse2.asm

+;*****************************************************************************
+;* SSE2-optimized weighted prediction code
+;*****************************************************************************
+;* Copyright (c) 2004-2005 Michael Niedermayer, Loren Merritt
+;* Copyright (C) 2010 Eli Friedman <eli.friedman@gmail.com>
+;*
+;* This file is part of FFmpeg.
+;*
+;* FFmpeg 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.
+;*
+;* FFmpeg 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 FFmpeg; if not, write to the Free Software
+;* 51, Inc., Foundation Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+;******************************************************************************
+
+%include "x86inc.asm"
+
+SECTION .text
+INIT_XMM
+
+;-----------------------------------------------------------------------------
+; biweight pred:
+;
+; void h264_biweight_16x16_sse2(uint8_t *dst, uint8_t *src, int stride,
+;                               int log2_denom, int weightd, int weights,
+;                               int offset);
+;-----------------------------------------------------------------------------
+
+%macro BIWEIGHT_SSE2_SETUP 0
+    add        r6, 1
+    or         r6, 1
+    add        r3, 1
+    movd       m3, r4
+    movd       m4, r5
+    movd       m5, r6
+    movd       m6, r3
+    pslld      m5, m6
+    psrld      m5, 1
+    pshuflw    m3, m3, 0
+    pshuflw    m4, m4, 0
+    pshuflw    m5, m5, 0
+    punpcklqdq m3, m3
+    punpcklqdq m4, m4
+    punpcklqdq m5, m5
+    pxor       m7, m7
+%endmacro
+
+%macro BIWEIGHT_SSE2_STEPA 3
+    movh       m%1, [r0+%3]
+    movh       m%2, [r1+%3]
+    punpcklbw  m%1, m7
+    punpcklbw  m%2, m7
+    pmullw     m%1, m3
+    pmullw     m%2, m4
+    paddsw     m%1, m%2
+%endmacro
+
+%macro BIWEIGHT_SSE2_STEPB 0
+    paddsw     m0, m5
+    paddsw     m1, m5
+    psraw      m0, m6
+    psraw      m1, m6
+    packuswb   m0, m1
+%endmacro
+
+cglobal h264_biweight_16x16_sse2, 7, 7, 8
+    BIWEIGHT_SSE2_SETUP
+    mov        r3, 16
+
+.nextrow
+    BIWEIGHT_SSE2_STEPA 0, 1, 0
+    BIWEIGHT_SSE2_STEPA 1, 2, 8
+    BIWEIGHT_SSE2_STEPB
+    mova       [r0], m0
+    add        r0, r2
+    add        r1, r2
+    dec        r3
+    jnz .nextrow
+    REP_RET
+
+cglobal h264_biweight_8x8_sse2, 7, 7, 8
+    BIWEIGHT_SSE2_SETUP
+    mov        r3, 4
+    lea        r4, [r2*2]
+
+.nextrow
+    BIWEIGHT_SSE2_STEPA 0, 1, 0
+    BIWEIGHT_SSE2_STEPA 1, 2, r2
+    BIWEIGHT_SSE2_STEPB
+    movh       [r0], m0
+    movhps     [r0+r2], m0
+    add        r0, r4
+    add        r1, r4
+    dec        r3
+    jnz .nextrow
+    REP_RET
+
+%macro BIWEIGHT_SSSE3_SETUP 0
+    add        r6, 1
+    or         r6, 1
+    add        r3, 1
+    movd       m4, r4
+    movd       m0, r5
+    movd       m5, r6
+    movd       m6, r3
+    pslld      m5, m6
+    psrld      m5, 1
+    punpcklbw  m4, m0
+    pshuflw    m4, m4, 0
+    pshuflw    m5, m5, 0
+    punpcklqdq m4, m4
+    punpcklqdq m5, m5
+%endmacro
+
+%macro BIWEIGHT_SSSE3_OP 0
+    pmaddubsw  m0, m4
+    pmaddubsw  m2, m4
+    paddsw     m0, m5
+    paddsw     m2, m5
+    psraw      m0, m6
+    psraw      m2, m6
+    packuswb   m0, m2
+%endmacro
+
+cglobal h264_biweight_16x16_ssse3, 7, 7, 8
+    BIWEIGHT_SSSE3_SETUP
+    mov        r3, 16
+
+.nextrow
+    movh       m0, [r0]
+    movh       m2, [r0+8]
+    movh       m3, [r1+8]
+    punpcklbw  m0, [r1]
+    punpcklbw  m2, m3
+    BIWEIGHT_SSSE3_OP
+    mova       [r0], m0
+    add        r0, r2
+    add        r1, r2
+    dec        r3
+    jnz .nextrow
+    REP_RET
+
+cglobal h264_biweight_8x8_ssse3, 7, 7, 8
+    BIWEIGHT_SSSE3_SETUP
+    mov        r3, 4
+    lea        r4, [r2*2]
+
+.nextrow
+    movh       m0, [r0]
+    movh       m1, [r1]
+    movh       m2, [r0+r2]
+    movh       m3, [r1+r2]
+    punpcklbw  m0, m1
+    punpcklbw  m2, m3
+    BIWEIGHT_SSSE3_OP
+    movh       [r0], m0
+    movhps     [r0+r2], m0
+    add        r0, r4
+    add        r1, r4
+    dec        r3
+    jnz .nextrow
+    REP_RET