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/** @file
* IPRT / No-CRT - x86 & AMD64 fenv.h.
*/
/*
* Copyright (C) 2022-2023 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
*/
#ifndef IPRT_INCLUDED_nocrt_x86_fenv_x86_amd64_h
#define IPRT_INCLUDED_nocrt_x86_fenv_x86_amd64_h
#ifndef RT_WITHOUT_PRAGMA_ONCE
# pragma once
#endif
#include <iprt/types.h>
typedef struct RTNOCRTFENV
{
/** The FPU environment. */
union
{
uint32_t au32[28/4];
#ifdef IPRT_INCLUDED_x86_h
X86FSTENV32P Env;
#endif
} fpu;
/** The SSE control & status register. */
uint32_t fMxCsr;
} RTNOCRTFENV;
/** Exception flags/mask. */
typedef uint16_t RTNOCRTFEXCEPT;
#ifndef IPRT_NOCRT_WITHOUT_CONFLICTING_TYPES
typedef RTNOCRTFENV fenv_t;
typedef RTNOCRTFEXCEPT fexcept_t;
#endif
/** @name Exception flags (same as X86_FCW_xM, X86_FSW_xE, X86_MXCSR_xE)
* @note The X86_FSW_SF is not covered here as it is more of a sub-type of
* invalid operand exception, and it is not part of MXCSR.
* @{ */
#define RT_NOCRT_FE_INVALID 0x0001
#define RT_NOCRT_FE_DENORMAL 0x0002
#define RT_NOCRT_FE_DIVBYZERO 0x0004
#define RT_NOCRT_FE_OVERFLOW 0x0008
#define RT_NOCRT_FE_UNDERFLOW 0x0010
#define RT_NOCRT_FE_INEXACT 0x0020
#define RT_NOCRT_FE_ALL_EXCEPT 0x003f
#ifndef IPRT_NOCRT_WITHOUT_MATH_CONSTANTS
# define FE_INVALID RT_NOCRT_FE_INVALID
# define FE_DENORMAL RT_NOCRT_FE_DENORMAL
# define FE_DIVBYZERO RT_NOCRT_FE_DIVBYZERO
# define FE_OVERFLOW RT_NOCRT_FE_OVERFLOW
# define FE_UNDERFLOW RT_NOCRT_FE_UNDERFLOW
# define FE_INEXACT RT_NOCRT_FE_INEXACT
# define FE_ALL_EXCEPT RT_NOCRT_FE_ALL_EXCEPT
#endif
/** @} */
/** @name Rounding Modes (same X86_FCW_RC_XXX)
* @{ */
#define RT_NOCRT_FE_TONEAREST 0x0000
#define RT_NOCRT_FE_DOWNWARD 0x0400
#define RT_NOCRT_FE_UPWARD 0x0800
#define RT_NOCRT_FE_TOWARDZERO 0x0c00
#define RT_NOCRT_FE_ROUND_MASK 0x0c00
#ifndef IPRT_NOCRT_WITHOUT_MATH_CONSTANTS
# define FE_TONEAREST RT_NOCRT_FE_TONEAREST
# define FE_DOWNWARD RT_NOCRT_FE_DOWNWARD
# define FE_UPWARD RT_NOCRT_FE_UPWARD
# define FE_TOWARDZERO RT_NOCRT_FE_TOWARDZERO
#endif
/** @} */
/** @name x87 Precision (same X86_FCW_PC_XXX)
* @{ */
#define RT_NOCRT_PC_FLOAT 0x0000
#define RT_NOCRT_PC_RSVD 0x0100
#define RT_NOCRT_PC_DOUBLE 0x0200
#define RT_NOCRT_PC_EXTENDED 0x0300
#define RT_NOCRT_PC_MASK 0x0300
/** @} */
/** @name Special environment pointer values.
* @note Only valid with fesetenv and feupdateenv.
* @note Defined as constants in fesetenv.asm.
* @{ */
/** The default FPU+SSE environment set, all exceptions disabled (masked). */
#define RT_NOCRT_FE_DFL_ENV ((RTNOCRTFENV const *)(intptr_t)1)
/** The default FPU+SSE environment set, but all exceptions enabled (unmasked)
* except for RT_NOCRT_FE_DENORMAL. */
#define RT_NOCRT_FE_NOMASK_ENV ((RTNOCRTFENV const *)(intptr_t)2)
/** The default FPU+SSE environment set, all exceptions disabled (masked),
* double precision (53 bit mantissa). */
#define RT_NOCRT_FE_PC53_ENV ((RTNOCRTFENV const *)(intptr_t)3)
/** The default FPU+SSE environment set, all exceptions disabled (masked),
* extended double precision (64 bit mantissa). */
#define RT_NOCRT_FE_PC64_ENV ((RTNOCRTFENV const *)(intptr_t)4)
#ifndef IPRT_NOCRT_WITHOUT_MATH_CONSTANTS
# define FE_DFL_ENV RT_NOCRT_FE_DFL_ENV
# define FE_NOMASK_ENV RT_NOCRT_FE_NOMASK_ENV
# define FE_PC53_ENV RT_NOCRT_FE_PC53_ENV
# define FE_PC64_ENV RT_NOCRT_FE_PC64_ENV
#endif
/** @} */
RT_C_DECLS_BEGIN
int RT_NOCRT(fegetenv)(RTNOCRTFENV *);
int RT_NOCRT(fesetenv)(RTNOCRTFENV const *);
int RT_NOCRT(feholdexcept)(RTNOCRTFENV *);
int RT_NOCRT(feupdateenv)(RTNOCRTFENV const *);
int RT_NOCRT(fegetround)(void);
int RT_NOCRT(fesetround)(int);
int RT_NOCRT(fegetexcept)(void);
int RT_NOCRT(feenableexcept)(int);
int RT_NOCRT(fedisableexcept)(int);
int RT_NOCRT(feclearexcept)(int);
int RT_NOCRT(fetestexcept)(int);
int RT_NOCRT(fegetexceptflag)(RTNOCRTFEXCEPT *, int);
int RT_NOCRT(fesetexceptflag)(RTNOCRTFEXCEPT const *, int);
int RT_NOCRT(feraiseexcept)(int);
/* IPRT addition: */
int RT_NOCRT(fegetx87precision)(void);
int RT_NOCRT(fesetx87precision)(int);
/* Underscored variants: */
int RT_NOCRT(_fegetenv)(RTNOCRTFENV *);
int RT_NOCRT(_fesetenv)(RTNOCRTFENV const *);
int RT_NOCRT(_feholdexcept)(RTNOCRTFENV *);
int RT_NOCRT(_feupdateenv)(RTNOCRTFENV const *);
int RT_NOCRT(_fegetround)(void);
int RT_NOCRT(_fesetround)(int);
int RT_NOCRT(_fegetexcept)(void);
int RT_NOCRT(_feenableexcept)(int);
int RT_NOCRT(_fedisableexcept)(int);
int RT_NOCRT(_feclearexcept)(int);
int RT_NOCRT(_fetestexcept)(int);
int RT_NOCRT(_fegetexceptflag)(RTNOCRTFEXCEPT *, int);
int RT_NOCRT(_fesetexceptflag)(RTNOCRTFEXCEPT const *, int);
int RT_NOCRT(_feraiseexcept)(int);
/* Aliases: */
#if !defined(RT_WITHOUT_NOCRT_WRAPPERS) && !defined(RT_WITHOUT_NOCRT_WRAPPER_ALIASES)
# define fegetenv RT_NOCRT(fegetenv)
# define fesetenv RT_NOCRT(fesetenv)
# define feholdexcept RT_NOCRT(feholdexcept)
# define feupdateenv RT_NOCRT(feupdateenv)
# define fegetround RT_NOCRT(fegetround)
# define fesetround RT_NOCRT(fesetround)
# define fegetexcept RT_NOCRT(fegetexcept)
# define feenableexcept RT_NOCRT(feenableexcept)
# define fedisableexcept RT_NOCRT(fedisableexcept)
# define feclearexcept RT_NOCRT(feclearexcept)
# define fetestexcept RT_NOCRT(fetestexcept)
# define fegetexceptflag RT_NOCRT(fegetexceptflag)
# define fesetexceptflag RT_NOCRT(fesetexceptflag)
# define feraiseexcept RT_NOCRT(feraiseexcept)
/* Underscored variants: */
# define _fegetenv RT_NOCRT(fegetenv)
# define _fesetenv RT_NOCRT(fesetenv)
# define _feholdexcept RT_NOCRT(feholdexcept)
# define _feupdateenv RT_NOCRT(feupdateenv)
# define _fegetround RT_NOCRT(fegetround)
# define _fesetround RT_NOCRT(fesetround)
# define _fegetexcept RT_NOCRT(fegetexcept)
# define _feenableexcept RT_NOCRT(feenableexcept)
# define _fedisableexcept RT_NOCRT(fedisableexcept)
# define _feclearexcept RT_NOCRT(feclearexcept)
# define _fetestexcept RT_NOCRT(fetestexcept)
# define _fegetexceptflag RT_NOCRT(fegetexceptflag)
# define _fesetexceptflag RT_NOCRT(fesetexceptflag)
# define _feraiseexcept RT_NOCRT(feraiseexcept)
#endif
RT_C_DECLS_END
#endif /* !IPRT_INCLUDED_nocrt_x86_fenv_x86_amd64_h */
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