gcc/d/dmd/root/ctfloat.h

   1
   2 /* Copyright (C) 1999-2023 by The D Language Foundation, All Rights Reserved
   3  * written by Walter Bright
   4  * https://www.digitalmars.com
   5  * Distributed under the Boost Software License, Version 1.0.
   6  * https://www.boost.org/LICENSE_1_0.txt
   7  * https://github.com/dlang/dmd/blob/master/src/dmd/root/ctfloat.h
   8  */
   9
  10 #pragma once
  11
  12 #include "dcompat.h"
  13 #include "longdouble.h"
  14
  15 // Type used by the front-end for compile-time reals
  16 typedef longdouble real_t;
  17
  18 // Compile-time floating-point helper
  19 struct CTFloat
  20 {
  21     static void yl2x(const real_t *x, const real_t *y, real_t *res);
  22     static void yl2xp1(const real_t *x, const real_t *y, real_t *res);
  23
  24     static real_t sin(real_t x);
  25     static real_t cos(real_t x);
  26     static real_t tan(real_t x);
  27     static real_t sqrt(real_t x);
  28     static real_t fabs(real_t x);
  29     static real_t ldexp(real_t n, int exp);
  30
  31     static real_t round(real_t x);
  32     static real_t floor(real_t x);
  33     static real_t ceil(real_t x);
  34     static real_t trunc(real_t x);
  35     static real_t log(real_t x);
  36     static real_t log2(real_t x);
  37     static real_t log10(real_t x);
  38     static real_t pow(real_t x, real_t y);
  39     static real_t exp(real_t x);
  40     static real_t expm1(real_t x);
  41     static real_t exp2(real_t x);
  42
  43     static real_t fmin(real_t x, real_t y);
  44     static real_t fmax(real_t x, real_t y);
  45     static real_t copysign(real_t x, real_t s);
  46
  47     static real_t fma(real_t x, real_t y, real_t z);
  48
  49     static bool isIdentical(real_t a, real_t b);
  50     static bool isNaN(real_t r);
  51     static bool isSNaN(real_t r);
  52     static bool isInfinity(real_t r);
  53
  54     static real_t parse(const char *literal, bool& isOutOfRange);
  55     static int sprint(char *str, d_size_t size, char fmt, real_t x);
  56
  57     static size_t hash(real_t a);
  58
  59     // Constant real values 0, 1, -1 and 0.5.
  60     static real_t zero;
  61     static real_t one;
  62     static real_t minusone;
  63     static real_t half;
  64
  65     static void initialize();
  66 };