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
bw_min2(const struct bw_fixed arg1,const struct bw_fixed arg2)42 static inline struct bw_fixed bw_min2(const struct bw_fixed arg1,
43 const struct bw_fixed arg2)
44 {
45 return (arg1.value <= arg2.value) ? arg1 : arg2;
46 }
47
bw_max2(const struct bw_fixed arg1,const struct bw_fixed arg2)48 static inline struct bw_fixed bw_max2(const struct bw_fixed arg1,
49 const struct bw_fixed arg2)
50 {
51 return (arg2.value <= arg1.value) ? arg1 : arg2;
52 }
53
bw_min3(struct bw_fixed v1,struct bw_fixed v2,struct bw_fixed v3)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
bw_max3(struct bw_fixed v1,struct bw_fixed v2,struct bw_fixed v3)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);
bw_int_to_fixed(int64_t value)69 static inline struct bw_fixed bw_int_to_fixed(int64_t value)
70 {
71 if (__builtin_constant_p(value)) {
72 struct bw_fixed res;
73 #ifdef notyet
74 BUILD_BUG_ON(value > BW_FIXED_MAX_I32 || value < BW_FIXED_MIN_I32);
75 #endif
76 res.value = value << BW_FIXED_BITS_PER_FRACTIONAL_PART;
77 return res;
78 } else
79 return bw_int_to_fixed_nonconst(value);
80 }
81
bw_fixed_to_int(struct bw_fixed value)82 static inline int32_t bw_fixed_to_int(struct bw_fixed value)
83 {
84 return BW_FIXED_GET_INTEGER_PART(value.value);
85 }
86
87 struct bw_fixed bw_frc_to_fixed(int64_t num, int64_t denum);
88
fixed31_32_to_bw_fixed(int64_t raw)89 static inline struct bw_fixed fixed31_32_to_bw_fixed(int64_t raw)
90 {
91 struct bw_fixed result = { 0 };
92
93 if (raw < 0) {
94 raw = -raw;
95 result.value = -(raw >> (32 - BW_FIXED_BITS_PER_FRACTIONAL_PART));
96 } else {
97 result.value = raw >> (32 - BW_FIXED_BITS_PER_FRACTIONAL_PART);
98 }
99
100 return result;
101 }
102
bw_add(const struct bw_fixed arg1,const struct bw_fixed arg2)103 static inline struct bw_fixed bw_add(const struct bw_fixed arg1,
104 const struct bw_fixed arg2)
105 {
106 struct bw_fixed res;
107
108 res.value = arg1.value + arg2.value;
109
110 return res;
111 }
112
bw_sub(const struct bw_fixed arg1,const struct bw_fixed arg2)113 static inline struct bw_fixed bw_sub(const struct bw_fixed arg1, const struct bw_fixed arg2)
114 {
115 struct bw_fixed res;
116
117 res.value = arg1.value - arg2.value;
118
119 return res;
120 }
121
122 struct bw_fixed bw_mul(const struct bw_fixed arg1, const struct bw_fixed arg2);
bw_div(const struct bw_fixed arg1,const struct bw_fixed arg2)123 static inline struct bw_fixed bw_div(const struct bw_fixed arg1, const struct bw_fixed arg2)
124 {
125 return bw_frc_to_fixed(arg1.value, arg2.value);
126 }
127
bw_mod(const struct bw_fixed arg1,const struct bw_fixed arg2)128 static inline struct bw_fixed bw_mod(const struct bw_fixed arg1, const struct bw_fixed arg2)
129 {
130 struct bw_fixed res;
131 div64_u64_rem(arg1.value, arg2.value, (uint64_t *)&res.value);
132 return res;
133 }
134
135 struct bw_fixed bw_floor2(const struct bw_fixed arg, const struct bw_fixed significance);
136 struct bw_fixed bw_ceil2(const struct bw_fixed arg, const struct bw_fixed significance);
137
bw_equ(const struct bw_fixed arg1,const struct bw_fixed arg2)138 static inline bool bw_equ(const struct bw_fixed arg1, const struct bw_fixed arg2)
139 {
140 return arg1.value == arg2.value;
141 }
142
bw_neq(const struct bw_fixed arg1,const struct bw_fixed arg2)143 static inline bool bw_neq(const struct bw_fixed arg1, const struct bw_fixed arg2)
144 {
145 return arg1.value != arg2.value;
146 }
147
bw_leq(const struct bw_fixed arg1,const struct bw_fixed arg2)148 static inline bool bw_leq(const struct bw_fixed arg1, const struct bw_fixed arg2)
149 {
150 return arg1.value <= arg2.value;
151 }
152
bw_meq(const struct bw_fixed arg1,const struct bw_fixed arg2)153 static inline bool bw_meq(const struct bw_fixed arg1, const struct bw_fixed arg2)
154 {
155 return arg1.value >= arg2.value;
156 }
157
bw_ltn(const struct bw_fixed arg1,const struct bw_fixed arg2)158 static inline bool bw_ltn(const struct bw_fixed arg1, const struct bw_fixed arg2)
159 {
160 return arg1.value < arg2.value;
161 }
162
bw_mtn(const struct bw_fixed arg1,const struct bw_fixed arg2)163 static inline bool bw_mtn(const struct bw_fixed arg1, const struct bw_fixed arg2)
164 {
165 return arg1.value > arg2.value;
166 }
167
168 #endif //BW_FIXED_H_
169