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 };
48