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| Rev | Author | Line No. | Line |
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| 6429 | siemargl | 1 | #ifndef _TCC_LIBM_H_ |
| 2 | #define _TCC_LIBM_H_ |
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| 3 | |||
| 4 | #include "../include/math.h" |
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| 5 | |||
| 6 | /* TCC uses 8 bytes for double and long double, so effectively the l variants |
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| 7 | * are never used. For now, they just run the normal (double) variant. |
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| 8 | */ |
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| 9 | |||
| 10 | /* |
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| 11 | * most of the code in this file is taken from MUSL rs-1.0 (MIT license) |
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| 12 | * - musl-libc: http://git.musl-libc.org/cgit/musl/tree/src/math?h=rs-1.0 |
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| 13 | * - License: http://git.musl-libc.org/cgit/musl/tree/COPYRIGHT?h=rs-1.0 |
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| 14 | */ |
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| 15 | |||
| 16 | /******************************************************************************* |
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| 17 | Start of code based on MUSL |
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| 18 | *******************************************************************************/ |
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| 19 | /* |
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| 20 | musl as a whole is licensed under the following standard MIT license: |
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| 21 | |||
| 22 | ---------------------------------------------------------------------- |
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| 23 | Copyright © 2005-2014 Rich Felker, et al. |
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| 24 | |||
| 25 | Permission is hereby granted, free of charge, to any person obtaining |
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| 26 | a copy of this software and associated documentation files (the |
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| 27 | "Software"), to deal in the Software without restriction, including |
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| 28 | without limitation the rights to use, copy, modify, merge, publish, |
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| 29 | distribute, sublicense, and/or sell copies of the Software, and to |
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| 30 | permit persons to whom the Software is furnished to do so, subject to |
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| 31 | the following conditions: |
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| 32 | |||
| 33 | The above copyright notice and this permission notice shall be |
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| 34 | included in all copies or substantial portions of the Software. |
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| 35 | |||
| 36 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
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| 37 | EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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| 38 | MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
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| 39 | IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY |
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| 40 | CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
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| 41 | TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
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| 42 | SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
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| 43 | ---------------------------------------------------------------------- |
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| 44 | */ |
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| 45 | |||
| 46 | /* fpclassify */ |
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| 47 | |||
| 48 | __CRT_INLINE int __cdecl __fpclassify (double x) { |
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| 49 | union {double f; uint64_t i;} u = {x}; |
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| 50 | int e = u.i>>52 & 0x7ff; |
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| 51 | if (!e) return u.i<<1 ? FP_SUBNORMAL : FP_ZERO; |
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| 52 | if (e==0x7ff) return u.i<<12 ? FP_NAN : FP_INFINITE; |
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| 53 | return FP_NORMAL; |
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| 54 | } |
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| 55 | |||
| 56 | __CRT_INLINE int __cdecl __fpclassifyf (float x) { |
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| 57 | union {float f; uint32_t i;} u = {x}; |
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| 58 | int e = u.i>>23 & 0xff; |
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| 59 | if (!e) return u.i<<1 ? FP_SUBNORMAL : FP_ZERO; |
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| 60 | if (e==0xff) return u.i<<9 ? FP_NAN : FP_INFINITE; |
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| 61 | return FP_NORMAL; |
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| 62 | } |
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| 63 | |||
| 64 | __CRT_INLINE int __cdecl __fpclassifyl (long double x) { |
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| 65 | return __fpclassify(x); |
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| 66 | } |
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| 67 | |||
| 68 | |||
| 69 | /* signbit */ |
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| 70 | |||
| 71 | __CRT_INLINE int __cdecl __signbit (double x) { |
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| 72 | union {double d; uint64_t i;} y = { x }; |
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| 73 | return y.i>>63; |
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| 74 | } |
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| 75 | |||
| 76 | __CRT_INLINE int __cdecl __signbitf (float x) { |
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| 77 | union {float f; uint32_t i; } y = { x }; |
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| 78 | return y.i>>31; |
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| 79 | } |
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| 80 | |||
| 81 | __CRT_INLINE int __cdecl __signbitl (long double x) { |
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| 82 | return __signbit(x); |
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| 83 | } |
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| 84 | |||
| 85 | |||
| 86 | /* fmin*, fmax* */ |
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| 87 | |||
| 88 | #define TCCFP_FMIN_EVAL (isnan(x) ? y : \ |
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| 89 | isnan(y) ? x : \ |
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| 90 | (signbit(x) != signbit(y)) ? (signbit(x) ? x : y) : \ |
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| 91 | x < y ? x : y) |
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| 92 | |||
| 93 | __CRT_INLINE double __cdecl fmin (double x, double y) { |
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| 94 | return TCCFP_FMIN_EVAL; |
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| 95 | } |
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| 96 | |||
| 97 | __CRT_INLINE float __cdecl fminf (float x, float y) { |
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| 98 | return TCCFP_FMIN_EVAL; |
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| 99 | } |
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| 100 | |||
| 101 | __CRT_INLINE long double __cdecl fminl (long double x, long double y) { |
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| 102 | return TCCFP_FMIN_EVAL; |
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| 103 | } |
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| 104 | |||
| 105 | #define TCCFP_FMAX_EVAL (isnan(x) ? y : \ |
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| 106 | isnan(y) ? x : \ |
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| 107 | (signbit(x) != signbit(y)) ? (signbit(x) ? y : x) : \ |
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| 108 | x < y ? y : x) |
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| 109 | |||
| 110 | __CRT_INLINE double __cdecl fmax (double x, double y) { |
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| 111 | return TCCFP_FMAX_EVAL; |
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| 112 | } |
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| 113 | |||
| 114 | __CRT_INLINE float __cdecl fmaxf (float x, float y) { |
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| 115 | return TCCFP_FMAX_EVAL; |
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| 116 | } |
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| 117 | |||
| 118 | __CRT_INLINE long double __cdecl fmaxl (long double x, long double y) { |
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| 119 | return TCCFP_FMAX_EVAL; |
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| 120 | } |
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| 121 | |||
| 122 | |||
| 123 | /* *round* */ |
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| 124 | |||
| 125 | #define TCCFP_FORCE_EVAL(x) do { \ |
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| 126 | if (sizeof(x) == sizeof(float)) { \ |
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| 127 | volatile float __x; \ |
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| 128 | __x = (x); \ |
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| 129 | } else if (sizeof(x) == sizeof(double)) { \ |
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| 130 | volatile double __x; \ |
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| 131 | __x = (x); \ |
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| 132 | } else { \ |
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| 133 | volatile long double __x; \ |
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| 134 | __x = (x); \ |
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| 135 | } \ |
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| 136 | } while(0) |
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| 137 | |||
| 138 | __CRT_INLINE double __cdecl round (double x) { |
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| 139 | union {double f; uint64_t i;} u = {x}; |
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| 140 | int e = u.i >> 52 & 0x7ff; |
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| 141 | double y; |
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| 142 | |||
| 143 | if (e >= 0x3ff+52) |
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| 144 | return x; |
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| 145 | if (u.i >> 63) |
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| 146 | x = -x; |
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| 147 | if (e < 0x3ff-1) { |
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| 148 | /* raise inexact if x!=0 */ |
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| 149 | TCCFP_FORCE_EVAL(x + 0x1p52); |
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| 150 | return 0*u.f; |
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| 151 | } |
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| 152 | y = (double)(x + 0x1p52) - 0x1p52 - x; |
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| 153 | if (y > 0.5) |
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| 154 | y = y + x - 1; |
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| 155 | else if (y <= -0.5) |
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| 156 | y = y + x + 1; |
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| 157 | else |
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| 158 | y = y + x; |
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| 159 | if (u.i >> 63) |
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| 160 | y = -y; |
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| 161 | return y; |
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| 162 | } |
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| 163 | |||
| 164 | __CRT_INLINE long __cdecl lround (double x) { |
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| 165 | return round(x); |
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| 166 | } |
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| 167 | |||
| 168 | __CRT_INLINE long long __cdecl llround (double x) { |
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| 169 | return round(x); |
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| 170 | } |
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| 171 | |||
| 172 | __CRT_INLINE float __cdecl roundf (float x) { |
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| 173 | return round(x); |
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| 174 | } |
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| 175 | |||
| 176 | __CRT_INLINE long __cdecl lroundf (float x) { |
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| 177 | return round(x); |
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| 178 | } |
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| 179 | |||
| 180 | __CRT_INLINE long long __cdecl llroundf (float x) { |
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| 181 | return round(x); |
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| 182 | } |
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| 183 | |||
| 184 | __CRT_INLINE long double __cdecl roundl (long double x) { |
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| 185 | return round(x); |
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| 186 | } |
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| 187 | |||
| 188 | __CRT_INLINE long __cdecl lroundl (long double x) { |
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| 189 | return round(x); |
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| 190 | } |
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| 191 | |||
| 192 | __CRT_INLINE long long __cdecl llroundl (long double x) { |
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| 193 | return round(x); |
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| 194 | } |
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| 195 | |||
| 196 | |||
| 197 | /******************************************************************************* |
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| 198 | End of code based on MUSL |
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| 199 | *******************************************************************************/ |
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| 200 | |||
| 201 | #endif /* _TCC_LIBM_H_ */ |