1 /* $NetBSD: bw_fixed.h,v 1.2 2021/12/18 23:45:05 riastradh Exp $ */ 2 3 /* 4 * Copyright 2015 Advanced Micro Devices, Inc. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the "Software"), 8 * to deal in the Software without restriction, including without limitation 9 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10 * and/or sell copies of the Software, and to permit persons to whom the 11 * Software is furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 22 * OTHER DEALINGS IN THE SOFTWARE. 23 * 24 * Authors: AMD 25 * 26 */ 27 28 #ifndef BW_FIXED_H_ 29 #define BW_FIXED_H_ 30 31 #define BW_FIXED_BITS_PER_FRACTIONAL_PART 24 32 33 #define BW_FIXED_GET_INTEGER_PART(x) ((x) >> BW_FIXED_BITS_PER_FRACTIONAL_PART) 34 struct bw_fixed { 35 int64_t value; 36 }; 37 38 #define BW_FIXED_MIN_I32 \ 39 (int64_t)(-(1LL << (63 - BW_FIXED_BITS_PER_FRACTIONAL_PART))) 40 41 #define BW_FIXED_MAX_I32 \ 42 (int64_t)((1ULL << (63 - BW_FIXED_BITS_PER_FRACTIONAL_PART)) - 1) 43 44 static inline struct bw_fixed bw_min2(const struct bw_fixed arg1, 45 const struct bw_fixed arg2) 46 { 47 return (arg1.value <= arg2.value) ? arg1 : arg2; 48 } 49 50 static inline struct bw_fixed bw_max2(const struct bw_fixed arg1, 51 const struct bw_fixed arg2) 52 { 53 return (arg2.value <= arg1.value) ? arg1 : arg2; 54 } 55 56 static inline struct bw_fixed bw_min3(struct bw_fixed v1, 57 struct bw_fixed v2, 58 struct bw_fixed v3) 59 { 60 return bw_min2(bw_min2(v1, v2), v3); 61 } 62 63 static inline struct bw_fixed bw_max3(struct bw_fixed v1, 64 struct bw_fixed v2, 65 struct bw_fixed v3) 66 { 67 return bw_max2(bw_max2(v1, v2), v3); 68 } 69 70 struct bw_fixed bw_int_to_fixed_nonconst(int64_t value); 71 static inline struct bw_fixed bw_int_to_fixed(int64_t value) 72 { 73 if (__builtin_constant_p(value)) { 74 struct bw_fixed res; 75 BUILD_BUG_ON(value > BW_FIXED_MAX_I32 || value < BW_FIXED_MIN_I32); 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 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 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 } 102 103 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 } 112 113 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); 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 } 127 128 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); 137 138 static inline bool bw_equ(const struct bw_fixed arg1, const struct bw_fixed arg2) 139 { 140 return arg1.value == arg2.value; 141 } 142 143 static inline bool bw_neq(const struct bw_fixed arg1, const struct bw_fixed arg2) 144 { 145 return arg1.value != arg2.value; 146 } 147 148 static inline bool bw_leq(const struct bw_fixed arg1, const struct bw_fixed arg2) 149 { 150 return arg1.value <= arg2.value; 151 } 152 153 static inline bool bw_meq(const struct bw_fixed arg1, const struct bw_fixed arg2) 154 { 155 return arg1.value >= arg2.value; 156 } 157 158 static inline bool bw_ltn(const struct bw_fixed arg1, const struct bw_fixed arg2) 159 { 160 return arg1.value < arg2.value; 161 } 162 163 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
Indexes created Mon Sep 22 21:09:42 GMT 2025