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
137
138
139
140
141
142
143
144
145
146
|
@//
@// Copyright (c) 2013 The WebRTC 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.
@//
@// This file was originally licensed as follows. It has been
@// relicensed with permission from the copyright holders.
@//
@//
@// File Name: omxSP_FFTInv_CCSToR_S32S16_Sfs_s.s
@// OpenMAX DL: v1.0.2
@// Last Modified Revision: 7098
@// Last Modified Date: Thu, 16 Aug 2007
@//
@// (c) Copyright 2007-2008 ARM Limited. All Rights Reserved.
@//
@//
@//
@// Description:
@// Compute an inverse FFT for a complex signal
@//
@// Include standard headers
#include "dl/api/armCOMM_s.h"
#include "dl/api/omxtypes_s.h"
@// Import symbols required from other files
@// (For example tables)
.extern omxSP_FFTInv_CCSToR_S32_Sfs
@// Set debugging level
@//DEBUG_ON SETL {TRUE}
@// Guarding implementation by the processor name
@// Guarding implementation by the processor name
@// Import symbols required from other files
@// (For example tables)
@//Input Registers
#define pSrc r0
#define pDst r1
#define pFFTSpec r2
#define scale r3
@// Output registers
#define result r0
#define N r6
#define pOut r5
#define pTmpDst r4
@// Neon registers
#define dX0 D0.S32
#define dX01 D1.S32
#define qX0 Q0.S32
#define dY0 D2.S16
#define dY0S32 D2.S32
@// Allocate stack memory required by the function
@// Write function header
M_START omxSP_FFTInv_CCSToR_S32S16_Sfs,r11,d15
.set ARMsFFTSpec_N, 0
.set ARMsFFTSpec_pBitRev, 4
.set ARMsFFTSpec_pTwiddle, 8
.set ARMsFFTSpec_pBuf, 12
@// Define stack arguments
@// Read the size from structure and take log
LDR N, [pFFTSpec, #ARMsFFTSpec_N]
@// Read other structure parameters
@//LDR pTwiddle, [pFFTSpec, #ARMsFFTSpec_pTwiddle]
LDR pOut, [pFFTSpec, #ARMsFFTSpec_pBuf]
MOV pTmpDst,pDst
ADD pDst,pOut,N, LSL #2
BL omxSP_FFTInv_CCSToR_S32_Sfs
ADD pDst,pOut,N, LSL #2
CMP N,#2
BGT copyLoop
BEQ copyS32ToS16
VLD1 dX0[0],[pDst]
VQMOVN dY0,qX0
VST1 dY0[0],[pTmpDst]
B End
copyS32ToS16:
VLD1 dX0,[pDst]
VQMOVN dY0,qX0
VST1 dY0S32[0],[pTmpDst]
B End
copyLoop:
VLD1 {dX0,dX01},[pDst]!
SUBS N,N,#4
VQMOVN dY0,qX0
VST1 dY0,[pTmpDst]!
BGT copyLoop
End:
@// Set return value
MOV result, #OMX_Sts_NoErr
@// Write function tail
M_END
.end
|