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 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 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 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 BUILD_BUG_ON(value > BW_FIXED_MAX_I32 || value < BW_FIXED_MIN_I32); 74 res.value = value << BW_FIXED_BITS_PER_FRACTIONAL_PART; 75 return res; 76 } else 77 return bw_int_to_fixed_nonconst(value); 78 } 79 80 static inline int32_t bw_fixed_to_int(struct bw_fixed value) 81 { 82 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 struct bw_fixed result = { 0 }; 90 91 if (raw < 0) { 92 raw = -raw; 93 result.value = -(raw >> (32 - BW_FIXED_BITS_PER_FRACTIONAL_PART)); 94 } else { 95 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 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 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 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 /* XXX: int64_t* -> u64* conversion! */ 130 div64_u64_rem(arg1.value, arg2.value, (u64 *)&res.value); 131 return res; 132 } 133 134 struct bw_fixed bw_floor2(const struct bw_fixed arg, const struct bw_fixed significance); 135 struct bw_fixed bw_ceil2(const struct bw_fixed arg, const struct bw_fixed significance); 136 137 static inline bool bw_equ(const struct bw_fixed arg1, const struct bw_fixed arg2) 138 { 139 return arg1.value == arg2.value; 140 } 141 142 static inline bool bw_neq(const struct bw_fixed arg1, const struct bw_fixed arg2) 143 { 144 return arg1.value != arg2.value; 145 } 146 147 static inline bool bw_leq(const struct bw_fixed arg1, const struct bw_fixed arg2) 148 { 149 return arg1.value <= arg2.value; 150 } 151 152 static inline bool bw_meq(const struct bw_fixed arg1, const struct bw_fixed arg2) 153 { 154 return arg1.value >= arg2.value; 155 } 156 157 static inline bool bw_ltn(const struct bw_fixed arg1, const struct bw_fixed arg2) 158 { 159 return arg1.value < arg2.value; 160 } 161 162 static inline bool bw_mtn(const struct bw_fixed arg1, const struct bw_fixed arg2) 163 { 164 return arg1.value > arg2.value; 165 } 166 167 #endif //BW_FIXED_H_ 168