dc/inc/bw_fixed.h

0001 /*
0002  * Copyright 2015 Advanced Micro Devices, Inc.
0003  *
0004  * Permission is hereby granted, free of charge, to any person obtaining a
0005  * copy of this software and associated documentation files (the "Software"),
0006  * to deal in the Software without restriction, including without limitation
0007  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
0008  * and/or sell copies of the Software, and to permit persons to whom the
0009  * Software is furnished to do so, subject to the following conditions:
0010  *
0011  * The above copyright notice and this permission notice shall be included in
0012  * all copies or substantial portions of the Software.
0013  *
0014  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
0015  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
0016  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
0017  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
0018  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
0019  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
0020  * OTHER DEALINGS IN THE SOFTWARE.
0021  *
0022  * Authors: AMD
0023  *
0024  */
0025
0026 #ifndef BW_FIXED_H_
0027 #define BW_FIXED_H_
0028
0029 #define BW_FIXED_BITS_PER_FRACTIONAL_PART 24
0030
0031 #define BW_FIXED_GET_INTEGER_PART(x) ((x) >> BW_FIXED_BITS_PER_FRACTIONAL_PART)
0032 struct bw_fixed {
0033     int64_t value;
0034 };
0035
0036 #define BW_FIXED_MIN_I32 \
0037     (int64_t)(-(1LL << (63 - BW_FIXED_BITS_PER_FRACTIONAL_PART)))
0038
0039 #define BW_FIXED_MAX_I32 \
0040     (int64_t)((1ULL << (63 - BW_FIXED_BITS_PER_FRACTIONAL_PART)) - 1)
0041
0042 static inline struct bw_fixed bw_min2(const struct bw_fixed arg1,
0043                       const struct bw_fixed arg2)
0044 {
0045     return (arg1.value <= arg2.value) ? arg1 : arg2;
0046 }
0047
0048 static inline struct bw_fixed bw_max2(const struct bw_fixed arg1,
0049                       const struct bw_fixed arg2)
0050 {
0051     return (arg2.value <= arg1.value) ? arg1 : arg2;
0052 }
0053
0054 static inline struct bw_fixed bw_min3(struct bw_fixed v1,
0055                       struct bw_fixed v2,
0056                       struct bw_fixed v3)
0057 {
0058     return bw_min2(bw_min2(v1, v2), v3);
0059 }
0060
0061 static inline struct bw_fixed bw_max3(struct bw_fixed v1,
0062                       struct bw_fixed v2,
0063                       struct bw_fixed v3)
0064 {
0065     return bw_max2(bw_max2(v1, v2), v3);
0066 }
0067
0068 struct bw_fixed bw_int_to_fixed_nonconst(int64_t value);
0069 static inline struct bw_fixed bw_int_to_fixed(int64_t value)
0070 {
0071     if (__builtin_constant_p(value)) {
0072         struct bw_fixed res;
0073         BUILD_BUG_ON(value > BW_FIXED_MAX_I32 || value < BW_FIXED_MIN_I32);
0074         res.value = value << BW_FIXED_BITS_PER_FRACTIONAL_PART;
0075         return res;
0076     } else
0077         return bw_int_to_fixed_nonconst(value);
0078 }
0079
0080 static inline int32_t bw_fixed_to_int(struct bw_fixed value)
0081 {
0082     return BW_FIXED_GET_INTEGER_PART(value.value);
0083 }
0084
0085 struct bw_fixed bw_frc_to_fixed(int64_t num, int64_t denum);
0086
0087 static inline struct bw_fixed fixed31_32_to_bw_fixed(int64_t raw)
0088 {
0089     struct bw_fixed result = { 0 };
0090
0091     if (raw < 0) {
0092         raw = -raw;
0093         result.value = -(raw >> (32 - BW_FIXED_BITS_PER_FRACTIONAL_PART));
0094     } else {
0095         result.value = raw >> (32 - BW_FIXED_BITS_PER_FRACTIONAL_PART);
0096     }
0097
0098     return result;
0099 }
0100
0101 static inline struct bw_fixed bw_add(const struct bw_fixed arg1,
0102                      const struct bw_fixed arg2)
0103 {
0104     struct bw_fixed res;
0105
0106     res.value = arg1.value + arg2.value;
0107
0108     return res;
0109 }
0110
0111 static inline struct bw_fixed bw_sub(const struct bw_fixed arg1, const struct bw_fixed arg2)
0112 {
0113     struct bw_fixed res;
0114
0115     res.value = arg1.value - arg2.value;
0116
0117     return res;
0118 }
0119
0120 struct bw_fixed bw_mul(const struct bw_fixed arg1, const struct bw_fixed arg2);
0121 static inline struct bw_fixed bw_div(const struct bw_fixed arg1, const struct bw_fixed arg2)
0122 {
0123     return bw_frc_to_fixed(arg1.value, arg2.value);
0124 }
0125
0126 static inline struct bw_fixed bw_mod(const struct bw_fixed arg1, const struct bw_fixed arg2)
0127 {
0128     struct bw_fixed res;
0129     div64_u64_rem(arg1.value, arg2.value, (uint64_t *)&res.value);
0130     return res;
0131 }
0132
0133 struct bw_fixed bw_floor2(const struct bw_fixed arg, const struct bw_fixed significance);
0134 struct bw_fixed bw_ceil2(const struct bw_fixed arg, const struct bw_fixed significance);
0135
0136 static inline bool bw_equ(const struct bw_fixed arg1, const struct bw_fixed arg2)
0137 {
0138     return arg1.value == arg2.value;
0139 }
0140
0141 static inline bool bw_neq(const struct bw_fixed arg1, const struct bw_fixed arg2)
0142 {
0143     return arg1.value != arg2.value;
0144 }
0145
0146 static inline bool bw_leq(const struct bw_fixed arg1, const struct bw_fixed arg2)
0147 {
0148     return arg1.value <= arg2.value;
0149 }
0150
0151 static inline bool bw_meq(const struct bw_fixed arg1, const struct bw_fixed arg2)
0152 {
0153     return arg1.value >= arg2.value;
0154 }
0155
0156 static inline bool bw_ltn(const struct bw_fixed arg1, const struct bw_fixed arg2)
0157 {
0158     return arg1.value < arg2.value;
0159 }
0160
0161 static inline bool bw_mtn(const struct bw_fixed arg1, const struct bw_fixed arg2)
0162 {
0163     return arg1.value > arg2.value;
0164 }
0165
0166 #endif //BW_FIXED_H_