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) 32struct 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 42static 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 48static 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 54static 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 61static 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 68struct bw_fixed bw_int_to_fixed_nonconst(int64_t value); 69static 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 82static inline int32_t bw_fixed_to_int(struct bw_fixed value) 83{ 84 return BW_FIXED_GET_INTEGER_PART(value.value); 85} 86 87struct bw_fixed bw_frc_to_fixed(int64_t num, int64_t denum); 88 89static 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 103static 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 113static 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 122struct bw_fixed bw_mul(const struct bw_fixed arg1, const struct bw_fixed arg2); 123static 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 128static 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 135struct bw_fixed bw_floor2(const struct bw_fixed arg, const struct bw_fixed significance); 136struct bw_fixed bw_ceil2(const struct bw_fixed arg, const struct bw_fixed significance); 137 138static inline bool bw_equ(const struct bw_fixed arg1, const struct bw_fixed arg2) 139{ 140 return arg1.value == arg2.value; 141} 142 143static inline bool bw_neq(const struct bw_fixed arg1, const struct bw_fixed arg2) 144{ 145 return arg1.value != arg2.value; 146} 147 148static inline bool bw_leq(const struct bw_fixed arg1, const struct bw_fixed arg2) 149{ 150 return arg1.value <= arg2.value; 151} 152 153static inline bool bw_meq(const struct bw_fixed arg1, const struct bw_fixed arg2) 154{ 155 return arg1.value >= arg2.value; 156} 157 158static inline bool bw_ltn(const struct bw_fixed arg1, const struct bw_fixed arg2) 159{ 160 return arg1.value < arg2.value; 161} 162 163static 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