File : a-numaux.ads
1 ------------------------------------------------------------------------------
2 -- --
3 -- GNAT RUN-TIME COMPONENTS --
4 -- --
5 -- A D A . N U M E R I C S . A U X --
6 -- --
7 -- S p e c --
8 -- (C Library Version, non-x86) --
9 -- --
10 -- Copyright (C) 1992-2014, Free Software Foundation, Inc. --
11 -- --
12 -- GNAT is free software; you can redistribute it and/or modify it under --
13 -- terms of the GNU General Public License as published by the Free Soft- --
14 -- ware Foundation; either version 3, or (at your option) any later ver- --
15 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
16 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
17 -- or FITNESS FOR A PARTICULAR PURPOSE. --
18 -- --
19 -- --
20 -- --
21 -- --
22 -- --
23 -- You should have received a copy of the GNU General Public License and --
24 -- a copy of the GCC Runtime Library Exception along with this program; --
25 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
26 -- <http://www.gnu.org/licenses/>. --
27 -- --
28 -- GNAT was originally developed by the GNAT team at New York University. --
29 -- Extensive contributions were provided by Ada Core Technologies Inc. --
30 -- --
31 ------------------------------------------------------------------------------
32
33 -- This package provides the basic computational interface for the generic
34 -- elementary functions. The C library version interfaces with the routines
35 -- in the C mathematical library, and is thus quite portable, although it may
36 -- not necessarily meet the requirements for accuracy in the numerics annex.
37 -- One advantage of using this package is that it will interface directly to
38 -- hardware instructions, such as the those provided on the Intel x86.
39
40 -- This version here is for use with normal Unix math functions. Alternative
41 -- versions are provided for special situations:
42
43 -- a-numaux-darwin For OS/X (special handling of sin/cos for accuracy)
44 -- a-numaux-libc-x86 For the x86, using 80-bit long double format
45 -- a-numaux-x86 For the x86, using 64-bit IEEE (inline asm statements)
46 -- a-numaux-vxworks For use on VxWorks (where we have no libm.a library)
47
48 package Ada.Numerics.Aux is
49 pragma Pure;
50
51 pragma Linker_Options ("-lm");
52
53 type Double is digits 15;
54 -- Type Double is the type used to call the C routines
55
56 -- We import these functions directly from C. Note that we label them
57 -- all as pure functions, because indeed all of them are in fact pure.
58
59 function Sin (X : Double) return Double;
60 pragma Import (C, Sin, "sin");
61 pragma Pure_Function (Sin);
62
63 function Cos (X : Double) return Double;
64 pragma Import (C, Cos, "cos");
65 pragma Pure_Function (Cos);
66
67 function Tan (X : Double) return Double;
68 pragma Import (C, Tan, "tan");
69 pragma Pure_Function (Tan);
70
71 function Exp (X : Double) return Double;
72 pragma Import (C, Exp, "exp");
73 pragma Pure_Function (Exp);
74
75 function Sqrt (X : Double) return Double;
76 pragma Import (C, Sqrt, "sqrt");
77 pragma Pure_Function (Sqrt);
78
79 function Log (X : Double) return Double;
80 pragma Import (C, Log, "log");
81 pragma Pure_Function (Log);
82
83 function Acos (X : Double) return Double;
84 pragma Import (C, Acos, "acos");
85 pragma Pure_Function (Acos);
86
87 function Asin (X : Double) return Double;
88 pragma Import (C, Asin, "asin");
89 pragma Pure_Function (Asin);
90
91 function Atan (X : Double) return Double;
92 pragma Import (C, Atan, "atan");
93 pragma Pure_Function (Atan);
94
95 function Sinh (X : Double) return Double;
96 pragma Import (C, Sinh, "sinh");
97 pragma Pure_Function (Sinh);
98
99 function Cosh (X : Double) return Double;
100 pragma Import (C, Cosh, "cosh");
101 pragma Pure_Function (Cosh);
102
103 function Tanh (X : Double) return Double;
104 pragma Import (C, Tanh, "tanh");
105 pragma Pure_Function (Tanh);
106
107 function Pow (X, Y : Double) return Double;
108 pragma Import (C, Pow, "pow");
109 pragma Pure_Function (Pow);
110
111 end Ada.Numerics.Aux;