1;*****************************************************************************
2;* SSE2-optimized H.264 iDCT
3;*****************************************************************************
4;* Copyright (C) 2003-2008 x264 project
5;*
6;* Authors: Laurent Aimar <fenrir@via.ecp.fr>
7;*          Loren Merritt <lorenm@u.washington.edu>
8;*          Holger Lubitz <hal@duncan.ol.sub.de>
9;*          Min Chen <chenm001.163.com>
10;*
11;* This program is free software; you can redistribute it and/or modify
12;* it under the terms of the GNU General Public License as published by
13;* the Free Software Foundation; either version 2 of the License, or
14;* (at your option) any later version.
15;*
16;* This program is distributed in the hope that it will be useful,
17;* but WITHOUT ANY WARRANTY; without even the implied warranty of
18;* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
19;* GNU General Public License for more details.
20;*
21;* You should have received a copy of the GNU General Public License
22;* along with this program; if not, write to the Free Software
23;* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02111, USA.
24;*****************************************************************************
25
26%include "x86inc.asm"
27%include "x86util.asm"
28
29SECTION_RODATA
30pw_32: times 8 dw 32
31
32SECTION .text
33
34%macro IDCT4_1D 6
35    SUMSUB_BA   m%3, m%1
36    SUMSUBD2_AB m%2, m%4, m%6, m%5
37    SUMSUB_BADC m%2, m%3, m%5, m%1
38    SWAP %1, %2, %5, %4, %3
39%endmacro
40
41INIT_XMM
42cglobal x264_add8x4_idct_sse2, 3,3
43    movq   m0, [r1+ 0]
44    movq   m1, [r1+ 8]
45    movq   m2, [r1+16]
46    movq   m3, [r1+24]
47    movhps m0, [r1+32]
48    movhps m1, [r1+40]
49    movhps m2, [r1+48]
50    movhps m3, [r1+56]
51    IDCT4_1D 0,1,2,3,4,5
52    TRANSPOSE2x4x4W 0,1,2,3,4
53    paddw m0, [pw_32 GLOBAL]
54    IDCT4_1D 0,1,2,3,4,5
55    pxor  m7, m7
56    STORE_DIFF  m0, m4, m7, [r0]
57    STORE_DIFF  m1, m4, m7, [r0+r2]
58    lea   r0, [r0+r2*2]
59    STORE_DIFF  m2, m4, m7, [r0]
60    STORE_DIFF  m3, m4, m7, [r0+r2]
61    RET
62