114 lines
3.3 KiB
C
114 lines
3.3 KiB
C
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/***************************************************************************
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* FILE: fenv.h (Floating-point environment)
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*
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* =========================================================================
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*
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* Open Watcom Project
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*
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* Copyright (c) 2002-2010 Open Watcom Contributors. All Rights Reserved.
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* Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
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*
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* This file is automatically generated. Do not edit directly.
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*
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* =========================================================================
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*
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* Description: This header is part of the C99 standard library. It
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* describes the floating-point environment
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***************************************************************************/
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#ifndef _FENV_H_INCLUDED
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#define _FENV_H_INCLUDED
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#ifndef _ENABLE_AUTODEPEND
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#pragma read_only_file;
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#endif
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#if !defined(__STDC_VERSION__) || __STDC_VERSION__ >= 199901L
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#ifndef _COMDEF_H_INCLUDED
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#include <_comdef.h>
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#endif
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#ifdef _M_IX86
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#pragma pack( __push, 1 )
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#else
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#pragma pack( __push, 8 )
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#endif
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/* type for holding FPU environment */
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#if defined(__386__)
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typedef struct {
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unsigned short control_word;
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unsigned short pad0;
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unsigned short status_word;
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unsigned short pad1;
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unsigned short tag_word;
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unsigned short pad2;
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unsigned int ins_ptr_offset;
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unsigned short ins_ptr_seg;
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unsigned short opcode;
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unsigned int op_ptr_offset;
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unsigned short op_ptr_seg;
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unsigned short pad3;
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} fenv_t;
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#else
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typedef struct {
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unsigned short control_word;
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unsigned short status_word;
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unsigned short tag_word;
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unsigned short ins_ptr_offset;
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unsigned short ins_ptr_seg;
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unsigned short op_ptr_offset;
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unsigned short op_ptr_seg;
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} fenv_t;
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#endif
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#pragma pack( __pop )
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/* type for holding FPU exception flags */
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typedef unsigned short fexcept_t;
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/* exception flags */
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#define FE_INVALID 1
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#define FE_DENORMAL 2
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#define FE_DIVBYZERO 4
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#define FE_OVERFLOW 8
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#define FE_UNDERFLOW 16
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#define FE_INEXACT 32
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#define FE_ALL_EXCEPT (FE_DIVBYZERO|FE_INEXACT|FE_INVALID|FE_OVERFLOW|FE_UNDERFLOW|FE_DENORMAL)
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/* rounding modes */
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#define FE_TONEAREST 0x0000
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#define FE_DOWNWARD 0x0400
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#define FE_TOWARDZERO 0x0C00
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#define FE_UPWARD 0x0800
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/* default FPU setup */
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_WCRTDATA extern const fenv_t __fenv_h_default_environment;
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#define FE_DFL_ENV &__fenv_h_default_environment
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/* exception handling functions */
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_WCRTLINK extern int feclearexcept( int __excepts );
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_WCRTLINK extern int fegetexceptflag( fexcept_t *__flagp, int __excepts );
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_WCRTLINK extern int feraiseexcept( int __excepts );
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_WCRTLINK extern int fesetexceptflag( const fexcept_t *__flagp, int __excepts );
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_WCRTLINK extern int fetestexcept( int __excepts );
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#if !defined(NO_EXT_KEYS) /* extensions enabled */
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_WCRTLINK extern void __feenableexcept( int __excepts );
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_WCRTLINK extern void __fedisableexcept( int __excepts );
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#endif /* extensions enabled */
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/* rounding mode functions */
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_WCRTLINK extern int fegetround( void );
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_WCRTLINK extern int fesetround( int __round );
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/* FPU environment functions */
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_WCRTLINK extern int fegetenv( fenv_t *__envp );
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_WCRTLINK extern int feholdexcept( fenv_t *__envp );
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_WCRTLINK extern int fesetenv( const fenv_t *__envp );
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_WCRTLINK extern int feupdateenv( const fenv_t *__envp );
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#endif
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#endif
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