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
14typedef longdouble real_t;
15
16// Compile-time floating-point helper
17struct 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