Line data Source code
1 : /*
2 : * Copyright 2015 Advanced Micro Devices, Inc.
3 : *
4 : * Permission is hereby granted, free of charge, to any person obtaining a
5 : * copy of this software and associated documentation files (the "Software"),
6 : * to deal in the Software without restriction, including without limitation
7 : * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 : * and/or sell copies of the Software, and to permit persons to whom the
9 : * Software is furnished to do so, subject to the following conditions:
10 : *
11 : * The above copyright notice and this permission notice shall be included in
12 : * all copies or substantial portions of the Software.
13 : *
14 : * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 : * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 : * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 : * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 : * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 : * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 : * OTHER DEALINGS IN THE SOFTWARE.
21 : *
22 : * Authors: AMD
23 : *
24 : */
25 :
26 : #ifndef BW_FIXED_H_
27 : #define BW_FIXED_H_
28 :
29 : #define BW_FIXED_BITS_PER_FRACTIONAL_PART 24
30 :
31 : #define BW_FIXED_GET_INTEGER_PART(x) ((x) >> BW_FIXED_BITS_PER_FRACTIONAL_PART)
32 : struct bw_fixed {
33 : int64_t value;
34 : };
35 :
36 : #define BW_FIXED_MIN_I32 \
37 : (int64_t)(-(1LL << (63 - BW_FIXED_BITS_PER_FRACTIONAL_PART)))
38 :
39 : #define BW_FIXED_MAX_I32 \
40 : (int64_t)((1ULL << (63 - BW_FIXED_BITS_PER_FRACTIONAL_PART)) - 1)
41 :
42 : static inline struct bw_fixed bw_min2(const struct bw_fixed arg1,
43 : const struct bw_fixed arg2)
44 : {
45 0 : return (arg1.value <= arg2.value) ? arg1 : arg2;
46 : }
47 :
48 : static inline struct bw_fixed bw_max2(const struct bw_fixed arg1,
49 : const struct bw_fixed arg2)
50 : {
51 0 : return (arg2.value <= arg1.value) ? arg1 : arg2;
52 : }
53 :
54 : static inline struct bw_fixed bw_min3(struct bw_fixed v1,
55 : struct bw_fixed v2,
56 : struct bw_fixed v3)
57 : {
58 : return bw_min2(bw_min2(v1, v2), v3);
59 : }
60 :
61 : static inline struct bw_fixed bw_max3(struct bw_fixed v1,
62 : struct bw_fixed v2,
63 : struct bw_fixed v3)
64 : {
65 : return bw_max2(bw_max2(v1, v2), v3);
66 : }
67 :
68 : struct bw_fixed bw_int_to_fixed_nonconst(int64_t value);
69 0 : static inline struct bw_fixed bw_int_to_fixed(int64_t value)
70 : {
71 0 : if (__builtin_constant_p(value)) {
72 : struct bw_fixed res;
73 0 : BUILD_BUG_ON(value > BW_FIXED_MAX_I32 || value < BW_FIXED_MIN_I32);
74 10 : res.value = value << BW_FIXED_BITS_PER_FRACTIONAL_PART;
75 0 : return res;
76 : } else
77 0 : return bw_int_to_fixed_nonconst(value);
78 : }
79 :
80 : static inline int32_t bw_fixed_to_int(struct bw_fixed value)
81 : {
82 0 : return BW_FIXED_GET_INTEGER_PART(value.value);
83 : }
84 :
85 : struct bw_fixed bw_frc_to_fixed(int64_t num, int64_t denum);
86 :
87 : static inline struct bw_fixed fixed31_32_to_bw_fixed(int64_t raw)
88 : {
89 0 : struct bw_fixed result = { 0 };
90 :
91 0 : if (raw < 0) {
92 0 : raw = -raw;
93 0 : result.value = -(raw >> (32 - BW_FIXED_BITS_PER_FRACTIONAL_PART));
94 : } else {
95 0 : result.value = raw >> (32 - BW_FIXED_BITS_PER_FRACTIONAL_PART);
96 : }
97 :
98 : return result;
99 : }
100 :
101 : static inline struct bw_fixed bw_add(const struct bw_fixed arg1,
102 : const struct bw_fixed arg2)
103 : {
104 : struct bw_fixed res;
105 :
106 0 : res.value = arg1.value + arg2.value;
107 :
108 : return res;
109 : }
110 :
111 : static inline struct bw_fixed bw_sub(const struct bw_fixed arg1, const struct bw_fixed arg2)
112 : {
113 : struct bw_fixed res;
114 :
115 0 : res.value = arg1.value - arg2.value;
116 :
117 : return res;
118 : }
119 :
120 : struct bw_fixed bw_mul(const struct bw_fixed arg1, const struct bw_fixed arg2);
121 : static inline struct bw_fixed bw_div(const struct bw_fixed arg1, const struct bw_fixed arg2)
122 : {
123 0 : return bw_frc_to_fixed(arg1.value, arg2.value);
124 : }
125 :
126 : static inline struct bw_fixed bw_mod(const struct bw_fixed arg1, const struct bw_fixed arg2)
127 : {
128 : struct bw_fixed res;
129 0 : div64_u64_rem(arg1.value, arg2.value, (uint64_t *)&res.value);
130 : return res;
131 : }
132 :
133 : struct bw_fixed bw_floor2(const struct bw_fixed arg, const struct bw_fixed significance);
134 : struct bw_fixed bw_ceil2(const struct bw_fixed arg, const struct bw_fixed significance);
135 :
136 : static inline bool bw_equ(const struct bw_fixed arg1, const struct bw_fixed arg2)
137 : {
138 : return arg1.value == arg2.value;
139 : }
140 :
141 : static inline bool bw_neq(const struct bw_fixed arg1, const struct bw_fixed arg2)
142 : {
143 : return arg1.value != arg2.value;
144 : }
145 :
146 : static inline bool bw_leq(const struct bw_fixed arg1, const struct bw_fixed arg2)
147 : {
148 : return arg1.value <= arg2.value;
149 : }
150 :
151 : static inline bool bw_meq(const struct bw_fixed arg1, const struct bw_fixed arg2)
152 : {
153 : return arg1.value >= arg2.value;
154 : }
155 :
156 : static inline bool bw_ltn(const struct bw_fixed arg1, const struct bw_fixed arg2)
157 : {
158 : return arg1.value < arg2.value;
159 : }
160 :
161 : static inline bool bw_mtn(const struct bw_fixed arg1, const struct bw_fixed arg2)
162 : {
163 : return arg1.value > arg2.value;
164 : }
165 :
166 : #endif //BW_FIXED_H_
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