1 | /*****************************************************************************/ |
2 | /* */ |
3 | /* fp.h */ |
4 | /* */ |
5 | /* Floating point support */ |
6 | /* */ |
7 | /* */ |
8 | /* */ |
9 | /* (C) 2008 Ullrich von Bassewitz */ |
10 | /* Roemerstrasse 52 */ |
11 | /* D-70794 Filderstadt */ |
12 | /* EMail: uz@cc65.org */ |
13 | /* */ |
14 | /* */ |
15 | /* This software is provided 'as-is', without any expressed or implied */ |
16 | /* warranty. In no event will the authors be held liable for any damages */ |
17 | /* arising from the use of this software. */ |
18 | /* */ |
19 | /* Permission is granted to anyone to use this software for any purpose, */ |
20 | /* including commercial applications, and to alter it and redistribute it */ |
21 | /* freely, subject to the following restrictions: */ |
22 | /* */ |
23 | /* 1. The origin of this software must not be misrepresented; you must not */ |
24 | /* claim that you wrote the original software. If you use this software */ |
25 | /* in a product, an acknowledgment in the product documentation would be */ |
26 | /* appreciated but is not required. */ |
27 | /* 2. Altered source versions must be plainly marked as such, and must not */ |
28 | /* be misrepresented as being the original software. */ |
29 | /* 3. This notice may not be removed or altered from any source */ |
30 | /* distribution. */ |
31 | /* */ |
32 | /*****************************************************************************/ |
33 | |
34 | |
35 | |
36 | /* The compiler must use the same floating point arithmetic as the target |
37 | ** platform, otherwise expressions will yield a different result when |
38 | ** evaluated in the compiler or on the target platform. Since writing a target |
39 | ** and source library is almost double the work, we will at least add the |
40 | ** hooks here, and define functions for a plug in library that may be added |
41 | ** at a later time. Currently we use the builtin data types of the compiler |
42 | ** that translates cc65. |
43 | ** |
44 | ** BEWARE: This code will currently only work on little endian systems! |
45 | */ |
46 | |
47 | |
48 | |
49 | #ifndef FP_H |
50 | #define FP_H |
51 | |
52 | |
53 | |
54 | #include <stddef.h> |
55 | |
56 | |
57 | |
58 | /*****************************************************************************/ |
59 | /* Data */ |
60 | /*****************************************************************************/ |
61 | |
62 | |
63 | typedef union Float Float; |
64 | union Float { |
65 | float V; |
66 | }; |
67 | |
68 | |
69 | |
70 | typedef union Double Double; |
71 | union Double { |
72 | double V; |
73 | }; |
74 | |
75 | |
76 | |
77 | /*****************************************************************************/ |
78 | /* Code */ |
79 | /*****************************************************************************/ |
80 | |
81 | |
82 | |
83 | size_t FP_F_Size (void); |
84 | /* Return the size of the data type float */ |
85 | |
86 | unsigned char* FP_F_Data (Float Val); |
87 | /* Return the raw data of a float in a malloc'ed buffer. Free after use. */ |
88 | |
89 | Float FP_F_Make (float Val); |
90 | /* Make a floating point variable from a float value */ |
91 | |
92 | Float FP_F_FromInt (long Val); |
93 | /* Convert an integer into a floating point variable */ |
94 | |
95 | float FP_F_ToFloat (Float Val); |
96 | /* Convert a Float into a native float */ |
97 | |
98 | Float FP_F_Add (Float Left, Float Right); |
99 | /* Add two floats */ |
100 | |
101 | Float FP_F_Sub (Float Left, Float Right); |
102 | /* Subtract two floats */ |
103 | |
104 | Float FP_F_Mul (Float Left, Float Right); |
105 | /* Multiplicate two floats */ |
106 | |
107 | Float FP_F_Div (Float Left, Float Right); |
108 | /* Divide two floats */ |
109 | |
110 | size_t FP_D_Size (void); |
111 | /* Return the size of the data type double */ |
112 | |
113 | unsigned char* FP_D_Data (Double Val); |
114 | /* Return the raw data of a double in a malloc'ed buffer. Free after use. */ |
115 | |
116 | Double FP_D_Make (double Val); |
117 | /* Make a floating point variable from a float value */ |
118 | |
119 | Double FP_D_FromInt (long Val); |
120 | /* Convert an integer into a floating point variable */ |
121 | |
122 | double FP_D_ToFloat (Double Val); |
123 | /* Convert a Double into a native double */ |
124 | |
125 | Double FP_D_Add (Double Left, Double Right); |
126 | /* Add two floats */ |
127 | |
128 | Double FP_D_Sub (Double Left, Double Right); |
129 | /* Subtract two floats */ |
130 | |
131 | Double FP_D_Mul (Double Left, Double Right); |
132 | /* Multiplicate two floats */ |
133 | |
134 | Double FP_D_Div (Double Left, Double Right); |
135 | /* Divide two floats */ |
136 | |
137 | |
138 | |
139 | /* End of fp.h */ |
140 | |
141 | #endif |
142 | |