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
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
|
/*
* Copyright (C) 2020 Linux Studio Plugins Project <https://lsp-plug.in/>
* (C) 2020 Vladimir Sadovnikov <sadko4u@gmail.com>
*
* This file is part of lsp-common-lib
* Created on: 1 апр. 2020 г.
*
* lsp-common-lib 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 3 of the License, or
* any later version.
*
* lsp-common-lib 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 lsp-common-lib. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef LSP_PLUG_IN_COMMON_ARCH_ARM_BITS_H_
#define LSP_PLUG_IN_COMMON_ARCH_ARM_BITS_H_
#ifndef LSP_PLUG_IN_COMMON_BITS_IMPL
#error "This file should not be included directly"
#endif /* LSP_PLUG_IN_COMMON_BITS_IMPL */
#ifdef ARCH_ARM7
#include <lsp-plug.in/common/arch/arm/armv7/bits.h>
#else
#include <lsp-plug.in/common/arch/arm/armv6/bits.h>
#endif
namespace lsp
{
inline int __lsp_forced_inline int_log2(uint8_t v)
{
int res = v;
ARCH_ARM_ASM
(
__ASM_EMIT("tst %[res], %[res]")
__ASM_EMIT("clzne %[res], %[res]")
__ASM_EMIT("rsbne %[res], %[res], $31")
: [res] "+r" (res)
: : "cc"
);
return res;
}
inline int __lsp_forced_inline int_log2(int8_t v)
{
int res = uint8_t(v);
ARCH_ARM_ASM
(
__ASM_EMIT("tst %[res], %[res]")
__ASM_EMIT("clzne %[res], %[res]")
__ASM_EMIT("rsbne %[res], %[res], $31")
: [res] "+r" (res)
: : "cc"
);
return res;
}
inline int __lsp_forced_inline int_log2(uint16_t v)
{
int res = v;
ARCH_ARM_ASM
(
__ASM_EMIT("tst %[res], %[res]")
__ASM_EMIT("clzne %[res], %[res]")
__ASM_EMIT("rsbne %[res], %[res], $31")
: [res] "+r" (res)
: : "cc"
);
return res;
}
inline int __lsp_forced_inline int_log2(int16_t v)
{
int res = uint16_t(v);
ARCH_ARM_ASM
(
__ASM_EMIT("tst %[res], %[res]")
__ASM_EMIT("clzne %[res], %[res]")
__ASM_EMIT("rsbne %[res], %[res], $31")
: [res] "+r" (res)
: : "cc"
);
return res;
}
inline int __lsp_forced_inline int_log2(uint32_t v)
{
int res = int(v);
ARCH_ARM_ASM
(
__ASM_EMIT("tst %[res], %[res]")
__ASM_EMIT("clzne %[res], %[res]")
__ASM_EMIT("rsbne %[res], %[res], $31")
: [res] "+r" (res)
: : "cc"
);
return res;
}
inline int __lsp_forced_inline int_log2(int32_t v)
{
int res = int(v);
ARCH_ARM_ASM
(
__ASM_EMIT("tst %[res], %[res]")
__ASM_EMIT("clzne %[res], %[res]")
__ASM_EMIT("rsbne %[res], %[res], $31")
: [res] "+r" (res)
: : "cc"
);
return res;
}
inline int __lsp_forced_inline int_log2(uint64_t v)
{
int hi = int(v >> 32);
int lo = int(v & 0xffffffff);
ARCH_ARM_ASM
(
__ASM_EMIT("tst %[hi], %[hi]")
__ASM_EMIT("beq 2f")
__ASM_EMIT("clzne %[lo], %[hi]")
__ASM_EMIT("rsbne %[lo], %[lo], $63")
__ASM_EMIT("b 4f")
__ASM_EMIT("2:")
__ASM_EMIT("tst %[lo], %[lo]")
__ASM_EMIT("clzne %[lo], %[lo]")
__ASM_EMIT("rsbne %[lo], %[lo], $31")
__ASM_EMIT("4:")
: [lo] "+r" (lo)
: [hi] "r" (hi)
: "cc"
);
return lo;
}
inline int __lsp_forced_inline int_log2(int64_t v)
{
int hi = int(uint64_t(v) >> 32);
int lo = int(v & 0xffffffff);
ARCH_ARM_ASM
(
__ASM_EMIT("tst %[hi], %[hi]")
__ASM_EMIT("beq 2f")
__ASM_EMIT("clzne %[lo], %[hi]")
__ASM_EMIT("rsbne %[lo], %[lo], $63")
__ASM_EMIT("b 4f")
__ASM_EMIT("2:")
__ASM_EMIT("tst %[lo], %[lo]")
__ASM_EMIT("clzne %[lo], %[lo]")
__ASM_EMIT("rsbne %[lo], %[lo], $31")
__ASM_EMIT("4:")
: [lo] "+r" (lo)
: [hi] "r" (hi)
: "cc"
);
return lo;
}
}
#endif /* LSP_PLUG_IN_COMMON_ARCH_ARM_BITS_H_ */
|
