gcc/d/dmd/root/ctfloat.h

   1
   2 /* Copyright (C) 1999-2019 by The D Language Foundation, All Rights Reserved
   3  * http://www.digitalmars.com
   4  * Distributed under the Boost Software License, Version 1.0.
   5  * http://www.boost.org/LICENSE_1_0.txt
   6  * https://github.com/dlang/dmd/blob/master/src/dmd/root/ctfloat.h
   7  */
   8
   9 #pragma once
  10
  11 #include "longdouble.h"
  12
  13 // Type used by the front-end for compile-time reals
  14 typedef longdouble real_t;
  15
  16 // Compile-time floating-point helper
  17 struct CTFloat
  18 {
  19     static bool yl2x_supported;
  20     static bool yl2xp1_supported;
  21
  22     static void yl2x(const real_t *x, const real_t *y, real_t *res);
  23     static void yl2xp1(const real_t *x, const real_t *y, real_t *res);
  24
  25     static real_t sin(real_t x);
  26     static real_t cos(real_t x);
  27     static real_t tan(real_t x);
  28     static real_t sqrt(real_t x);
  29     static real_t fabs(real_t x);
  30     static real_t ldexp(real_t n, int exp);
  31
  32     static bool isIdentical(real_t a, real_t b);
  33     static bool isNaN(real_t r);
  34     static bool isSNaN(real_t r);
  35     static bool isInfinity(real_t r);
  36
  37     static real_t parse(const char *literal, bool *isOutOfRange = NULL);
  38     static int sprint(char *str, char fmt, real_t x);
  39
  40     static size_t hash(real_t a);
  41
  42     // Constant real values 0, 1, -1 and 0.5.
  43     static real_t zero;
  44     static real_t one;
  45     static real_t minusone;
  46     static real_t half;
  47 };