1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
|
;
; Copyright (c) 2010 The WebM project authors. All Rights Reserved.
;
; Use of this source code is governed by a BSD-style license
; that can be found in the LICENSE file in the root of the source
; tree. An additional intellectual property rights grant can be found
; in the file PATENTS. All contributing project authors may
; be found in the AUTHORS file in the root of the source tree.
;
EXPORT |vp8_short_inv_walsh4x4_v6|
ARM
REQUIRE8
PRESERVE8
AREA |.text|, CODE, READONLY ; name this block of code
;short vp8_short_inv_walsh4x4_v6(short *input, short *mb_dqcoeff)
|vp8_short_inv_walsh4x4_v6| PROC
stmdb sp!, {r4 - r12, lr}
ldr r2, [r0, #0] ; [1 | 0]
ldr r3, [r0, #4] ; [3 | 2]
ldr r4, [r0, #8] ; [5 | 4]
ldr r5, [r0, #12] ; [7 | 6]
ldr r6, [r0, #16] ; [9 | 8]
ldr r7, [r0, #20] ; [11 | 10]
ldr r8, [r0, #24] ; [13 | 12]
ldr r9, [r0, #28] ; [15 | 14]
qadd16 r10, r2, r8 ; a1 [1+13 | 0+12]
qadd16 r11, r4, r6 ; b1 [5+9 | 4+8]
qsub16 r12, r4, r6 ; c1 [5-9 | 4-8]
qsub16 lr, r2, r8 ; d1 [1-13 | 0-12]
qadd16 r2, r10, r11 ; a1 + b1 [1 | 0]
qadd16 r4, r12, lr ; c1 + d1 [5 | 4]
qsub16 r6, r10, r11 ; a1 - b1 [9 | 8]
qsub16 r8, lr, r12 ; d1 - c1 [13 | 12]
qadd16 r10, r3, r9 ; a1 [3+15 | 2+14]
qadd16 r11, r5, r7 ; b1 [7+11 | 6+10]
qsub16 r12, r5, r7 ; c1 [7-11 | 6-10]
qsub16 lr, r3, r9 ; d1 [3-15 | 2-14]
qadd16 r3, r10, r11 ; a1 + b1 [3 | 2]
qadd16 r5, r12, lr ; c1 + d1 [7 | 6]
qsub16 r7, r10, r11 ; a1 - b1 [11 | 10]
qsub16 r9, lr, r12 ; d1 - c1 [15 | 14]
; first transform complete
qsubaddx r10, r2, r3 ; [c1|a1] [1-2 | 0+3]
qaddsubx r11, r2, r3 ; [b1|d1] [1+2 | 0-3]
qsubaddx r12, r4, r5 ; [c1|a1] [5-6 | 4+7]
qaddsubx lr, r4, r5 ; [b1|d1] [5+6 | 4-7]
qaddsubx r2, r10, r11 ; [b2|c2] [c1+d1 | a1-b1]
qaddsubx r3, r11, r10 ; [a2|d2] [b1+a1 | d1-c1]
ldr r10, c0x00030003
qaddsubx r4, r12, lr ; [b2|c2] [c1+d1 | a1-b1]
qaddsubx r5, lr, r12 ; [a2|d2] [b1+a1 | d1-c1]
qadd16 r2, r2, r10 ; [b2+3|c2+3]
qadd16 r3, r3, r10 ; [a2+3|d2+3]
qadd16 r4, r4, r10 ; [b2+3|c2+3]
qadd16 r5, r5, r10 ; [a2+3|d2+3]
asr r12, r3, #19 ; [0]
strh r12, [r1], #32
asr lr, r2, #19 ; [1]
strh lr, [r1], #32
sxth r2, r2
sxth r3, r3
asr r2, r2, #3 ; [2]
strh r2, [r1], #32
asr r3, r3, #3 ; [3]
strh r3, [r1], #32
asr r12, r5, #19 ; [4]
strh r12, [r1], #32
asr lr, r4, #19 ; [5]
strh lr, [r1], #32
sxth r4, r4
sxth r5, r5
asr r4, r4, #3 ; [6]
strh r4, [r1], #32
asr r5, r5, #3 ; [7]
strh r5, [r1], #32
qsubaddx r2, r6, r7 ; [c1|a1] [9-10 | 8+11]
qaddsubx r3, r6, r7 ; [b1|d1] [9+10 | 8-11]
qsubaddx r4, r8, r9 ; [c1|a1] [13-14 | 12+15]
qaddsubx r5, r8, r9 ; [b1|d1] [13+14 | 12-15]
qaddsubx r6, r2, r3 ; [b2|c2] [c1+d1 | a1-b1]
qaddsubx r7, r3, r2 ; [a2|d2] [b1+a1 | d1-c1]
qaddsubx r8, r4, r5 ; [b2|c2] [c1+d1 | a1-b1]
qaddsubx r9, r5, r4 ; [a2|d2] [b1+a1 | d1-c1]
qadd16 r6, r6, r10 ; [b2+3|c2+3]
qadd16 r7, r7, r10 ; [a2+3|d2+3]
qadd16 r8, r8, r10 ; [b2+3|c2+3]
qadd16 r9, r9, r10 ; [a2+3|d2+3]
asr r12, r7, #19 ; [8]
strh r12, [r1], #32
asr lr, r6, #19 ; [9]
strh lr, [r1], #32
sxth r6, r6
sxth r7, r7
asr r6, r6, #3 ; [10]
strh r6, [r1], #32
asr r7, r7, #3 ; [11]
strh r7, [r1], #32
asr r12, r9, #19 ; [12]
strh r12, [r1], #32
asr lr, r8, #19 ; [13]
strh lr, [r1], #32
sxth r8, r8
sxth r9, r9
asr r8, r8, #3 ; [14]
strh r8, [r1], #32
asr r9, r9, #3 ; [15]
strh r9, [r1], #32
ldmia sp!, {r4 - r12, pc}
ENDP ; |vp8_short_inv_walsh4x4_v6|
; Constant Pool
c0x00030003 DCD 0x00030003
END
|
