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142 lines
5.1 KiB
C
142 lines
5.1 KiB
C
/*****************************************************************************/
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/* */
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/* fp.h */
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/* */
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/* Floating point support */
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/* */
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/* */
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/* */
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/* (C) 2008 Ullrich von Bassewitz */
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/* Roemerstrasse 52 */
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/* D-70794 Filderstadt */
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/* EMail: uz@cc65.org */
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/* */
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/* */
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/* This software is provided 'as-is', without any expressed or implied */
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/* warranty. In no event will the authors be held liable for any damages */
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/* arising from the use of this software. */
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/* */
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/* Permission is granted to anyone to use this software for any purpose, */
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/* including commercial applications, and to alter it and redistribute it */
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/* freely, subject to the following restrictions: */
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/* */
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/* 1. The origin of this software must not be misrepresented; you must not */
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/* claim that you wrote the original software. If you use this software */
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/* in a product, an acknowledgment in the product documentation would be */
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/* appreciated but is not required. */
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/* 2. Altered source versions must be plainly marked as such, and must not */
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/* be misrepresented as being the original software. */
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/* 3. This notice may not be removed or altered from any source */
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/* distribution. */
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/* */
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/*****************************************************************************/
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/* The compiler must use the same floating point arithmetic as the target
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** platform, otherwise expressions will yield a different result when
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** evaluated in the compiler or on the target platform. Since writing a target
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** and source library is almost double the work, we will at least add the
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** hooks here, and define functions for a plug in library that may be added
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** at a later time. Currently we use the builtin data types of the compiler
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** that translates cc65.
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**
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** BEWARE: This code will currently only work on little endian systems!
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*/
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#ifndef FP_H
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#define FP_H
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#include <stddef.h>
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/*****************************************************************************/
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/* Data */
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/*****************************************************************************/
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typedef union Float Float;
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union Float {
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float V;
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};
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typedef union Double Double;
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union Double {
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double V;
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};
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/*****************************************************************************/
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/* Code */
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/*****************************************************************************/
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size_t FP_F_Size (void);
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/* Return the size of the data type float */
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unsigned char* FP_F_Data (Float Val);
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/* Return the raw data of a float in a malloc'ed buffer. Free after use. */
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Float FP_F_Make (float Val);
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/* Make a floating point variable from a float value */
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Float FP_F_FromInt (long Val);
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/* Convert an integer into a floating point variable */
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float FP_F_ToFloat (Float Val);
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/* Convert a Float into a native float */
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Float FP_F_Add (Float Left, Float Right);
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/* Add two floats */
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Float FP_F_Sub (Float Left, Float Right);
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/* Subtract two floats */
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Float FP_F_Mul (Float Left, Float Right);
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/* Multiplicate two floats */
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Float FP_F_Div (Float Left, Float Right);
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/* Divide two floats */
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size_t FP_D_Size (void);
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/* Return the size of the data type double */
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unsigned char* FP_D_Data (Double Val);
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/* Return the raw data of a double in a malloc'ed buffer. Free after use. */
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Double FP_D_Make (double Val);
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/* Make a floating point variable from a float value */
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Double FP_D_FromInt (long Val);
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/* Convert an integer into a floating point variable */
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double FP_D_ToFloat (Double Val);
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/* Convert a Double into a native double */
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Double FP_D_Add (Double Left, Double Right);
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/* Add two floats */
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Double FP_D_Sub (Double Left, Double Right);
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/* Subtract two floats */
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Double FP_D_Mul (Double Left, Double Right);
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/* Multiplicate two floats */
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Double FP_D_Div (Double Left, Double Right);
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/* Divide two floats */
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/* End of fp.h */
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#endif
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