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1/*2 * Copyright 2015 Advanced Micro Devices, Inc.3 *4 * Permission is hereby granted, free of charge, to any person obtaining a5 * copy of this software and associated documentation files (the "Software"),6 * to deal in the Software without restriction, including without limitation7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,8 * and/or sell copies of the Software, and to permit persons to whom the9 * Software is furnished to do so, subject to the following conditions:10 *11 * The above copyright notice and this permission notice shall be included in12 * all copies or substantial portions of the Software.13 *14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR18 * 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 OR20 * OTHER DEALINGS IN THE SOFTWARE.21 *22 * Authors: AMD23 *24 */25 26#ifndef BW_FIXED_H_27#define BW_FIXED_H_28 29#define BW_FIXED_BITS_PER_FRACTIONAL_PART 2430 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 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 } else77 return bw_int_to_fixed_nonconst(value);78}79 80static inline int32_t bw_fixed_to_int(struct bw_fixed value)81{82 return BW_FIXED_GET_INTEGER_PART(value.value);83}84 85struct bw_fixed bw_frc_to_fixed(int64_t num, int64_t denum);86 87static 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 101static 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 111static 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 120struct bw_fixed bw_mul(const struct bw_fixed arg1, const struct bw_fixed arg2);121static 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 126static inline struct bw_fixed bw_mod(const struct bw_fixed arg1, const struct bw_fixed arg2)127{128 struct bw_fixed res;129 div64_u64_rem(arg1.value, arg2.value, (uint64_t *)&res.value);130 return res;131}132 133struct bw_fixed bw_floor2(const struct bw_fixed arg, const struct bw_fixed significance);134struct bw_fixed bw_ceil2(const struct bw_fixed arg, const struct bw_fixed significance);135 136static inline bool bw_equ(const struct bw_fixed arg1, const struct bw_fixed arg2)137{138 return arg1.value == arg2.value;139}140 141static inline bool bw_neq(const struct bw_fixed arg1, const struct bw_fixed arg2)142{143 return arg1.value != arg2.value;144}145 146static inline bool bw_leq(const struct bw_fixed arg1, const struct bw_fixed arg2)147{148 return arg1.value <= arg2.value;149}150 151static inline bool bw_meq(const struct bw_fixed arg1, const struct bw_fixed arg2)152{153 return arg1.value >= arg2.value;154}155 156static inline bool bw_ltn(const struct bw_fixed arg1, const struct bw_fixed arg2)157{158 return arg1.value < arg2.value;159}160 161static 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_167