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1;
2;  Copyright (c) 2015 The WebM project authors. All Rights Reserved.
3;
4;  Use of this source code is governed by a BSD-style license
5;  that can be found in the LICENSE file in the root of the source
6;  tree. An additional intellectual property rights grant can be found
7;  in the file PATENTS.  All contributing project authors may
8;  be found in the AUTHORS file in the root of the source tree.
9;
10
11%include "third_party/x86inc/x86inc.asm"
12%include "vpx_dsp/x86/bitdepth_conversion_sse2.asm"
13
14SECTION .text
15
16%macro REORDER_INPUTS 0
17  ; a c d b  to  a b c d
18  SWAP 1, 3, 2
19%endmacro
20
21%macro TRANSFORM_COLS 0
22  ; input:
23  ; m0 a
24  ; m1 b
25  ; m2 c
26  ; m3 d
27  paddw           m0,        m2
28  psubw           m3,        m1
29
30  ; wide subtract
31  punpcklwd       m4,        m0
32  punpcklwd       m5,        m3
33  psrad           m4,        16
34  psrad           m5,        16
35  psubd           m4,        m5
36  psrad           m4,        1
37  packssdw        m4,        m4             ; e
38
39  psubw           m5,        m4,        m1  ; b
40  psubw           m4,        m2             ; c
41  psubw           m0,        m5
42  paddw           m3,        m4
43                                ; m0 a
44  SWAP            1,         5  ; m1 b
45  SWAP            2,         4  ; m2 c
46                                ; m3 d
47%endmacro
48
49%macro TRANSPOSE_4X4 0
50  punpcklwd       m0,        m2
51  punpcklwd       m1,        m3
52  mova            m2,        m0
53  punpcklwd       m0,        m1
54  punpckhwd       m2,        m1
55  pshufd          m1,        m0, 0x0e
56  pshufd          m3,        m2, 0x0e
57%endmacro
58
59; transpose a 4x4 int16 matrix in xmm0 and xmm1 to the bottom half of xmm0-xmm3
60%macro TRANSPOSE_4X4_WIDE 0
61  mova            m3, m0
62  punpcklwd       m0, m1
63  punpckhwd       m3, m1
64  mova            m2, m0
65  punpcklwd       m0, m3
66  punpckhwd       m2, m3
67  pshufd          m1, m0, 0x0e
68  pshufd          m3, m2, 0x0e
69%endmacro
70
71%macro ADD_STORE_4P_2X 5  ; src1, src2, tmp1, tmp2, zero
72  movd            m%3,       [outputq]
73  movd            m%4,       [outputq + strideq]
74  punpcklbw       m%3,       m%5
75  punpcklbw       m%4,       m%5
76  paddw           m%1,       m%3
77  paddw           m%2,       m%4
78  packuswb        m%1,       m%5
79  packuswb        m%2,       m%5
80  movd            [outputq], m%1
81  movd            [outputq + strideq], m%2
82%endmacro
83
84INIT_XMM sse2
85cglobal iwht4x4_16_add, 3, 3, 7, input, output, stride
86  LOAD_TRAN_LOW    0, inputq, 0
87  LOAD_TRAN_LOW    1, inputq, 8
88  psraw           m0,        2
89  psraw           m1,        2
90
91  TRANSPOSE_4X4_WIDE
92  REORDER_INPUTS
93  TRANSFORM_COLS
94  TRANSPOSE_4X4
95  REORDER_INPUTS
96  TRANSFORM_COLS
97
98  pxor            m4, m4
99  ADD_STORE_4P_2X  0, 1, 5, 6, 4
100  lea             outputq, [outputq + 2 * strideq]
101  ADD_STORE_4P_2X  2, 3, 5, 6, 4
102
103  RET
104