| 1 | /** @file
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| 2 | * IPRT / No-CRT - x86 & AMD64 fenv.h.
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| 3 | */
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| 4 |
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| 5 | /*
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| 6 | * Copyright (C) 2022-2024 Oracle and/or its affiliates.
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| 7 | *
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| 8 | * This file is part of VirtualBox base platform packages, as
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| 9 | * available from https://www.virtualbox.org.
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| 10 | *
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| 11 | * This program is free software; you can redistribute it and/or
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| 12 | * modify it under the terms of the GNU General Public License
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| 13 | * as published by the Free Software Foundation, in version 3 of the
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| 14 | * License.
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| 15 | *
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| 16 | * This program is distributed in the hope that it will be useful, but
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| 17 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 19 | * General Public License for more details.
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| 20 | *
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| 21 | * You should have received a copy of the GNU General Public License
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| 22 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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| 23 | *
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| 24 | * The contents of this file may alternatively be used under the terms
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| 25 | * of the Common Development and Distribution License Version 1.0
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| 26 | * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
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| 27 | * in the VirtualBox distribution, in which case the provisions of the
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| 28 | * CDDL are applicable instead of those of the GPL.
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| 29 | *
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| 30 | * You may elect to license modified versions of this file under the
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| 31 | * terms and conditions of either the GPL or the CDDL or both.
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| 32 | *
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| 33 | * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
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| 34 | */
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| 35 |
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| 36 | #ifndef IPRT_INCLUDED_nocrt_x86_fenv_x86_amd64_h
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| 37 | #define IPRT_INCLUDED_nocrt_x86_fenv_x86_amd64_h
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| 38 | #ifndef RT_WITHOUT_PRAGMA_ONCE
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| 39 | # pragma once
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| 40 | #endif
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| 41 |
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| 42 | #include <iprt/types.h>
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| 43 |
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| 44 | typedef struct RTNOCRTFENV
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| 45 | {
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| 46 | /** The FPU environment. */
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| 47 | union
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| 48 | {
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| 49 | uint32_t au32[28/4];
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| 50 | #ifdef IPRT_INCLUDED_x86_h
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| 51 | X86FSTENV32P Env;
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| 52 | #endif
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| 53 | } fpu;
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| 54 | /** The SSE control & status register. */
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| 55 | uint32_t fMxCsr;
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| 56 | } RTNOCRTFENV;
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| 57 |
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| 58 | /** Exception flags/mask. */
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| 59 | typedef uint16_t RTNOCRTFEXCEPT;
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| 60 |
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| 61 | #ifndef IPRT_NOCRT_WITHOUT_CONFLICTING_TYPES
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| 62 | typedef RTNOCRTFENV fenv_t;
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| 63 | typedef RTNOCRTFEXCEPT fexcept_t;
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| 64 | #endif
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| 65 |
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| 66 | /** @name Exception flags (same as X86_FCW_xM, X86_FSW_xE, X86_MXCSR_xE)
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| 67 | * @note The X86_FSW_SF is not covered here as it is more of a sub-type of
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| 68 | * invalid operand exception, and it is not part of MXCSR.
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| 69 | * @{ */
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| 70 | #define RT_NOCRT_FE_INVALID 0x0001
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| 71 | #define RT_NOCRT_FE_DENORMAL 0x0002
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| 72 | #define RT_NOCRT_FE_DIVBYZERO 0x0004
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| 73 | #define RT_NOCRT_FE_OVERFLOW 0x0008
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| 74 | #define RT_NOCRT_FE_UNDERFLOW 0x0010
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| 75 | #define RT_NOCRT_FE_INEXACT 0x0020
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| 76 | #define RT_NOCRT_FE_ALL_EXCEPT 0x003f
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| 77 | #ifndef IPRT_NOCRT_WITHOUT_MATH_CONSTANTS
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| 78 | # define FE_INVALID RT_NOCRT_FE_INVALID
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| 79 | # define FE_DENORMAL RT_NOCRT_FE_DENORMAL
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| 80 | # define FE_DIVBYZERO RT_NOCRT_FE_DIVBYZERO
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| 81 | # define FE_OVERFLOW RT_NOCRT_FE_OVERFLOW
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| 82 | # define FE_UNDERFLOW RT_NOCRT_FE_UNDERFLOW
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| 83 | # define FE_INEXACT RT_NOCRT_FE_INEXACT
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| 84 | # define FE_ALL_EXCEPT RT_NOCRT_FE_ALL_EXCEPT
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| 85 | #endif
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| 86 | /** @} */
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| 87 |
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| 88 | /** @name Rounding Modes (same X86_FCW_RC_XXX)
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| 89 | * @{ */
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| 90 | #define RT_NOCRT_FE_TONEAREST 0x0000
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| 91 | #define RT_NOCRT_FE_DOWNWARD 0x0400
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| 92 | #define RT_NOCRT_FE_UPWARD 0x0800
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| 93 | #define RT_NOCRT_FE_TOWARDZERO 0x0c00
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| 94 | #define RT_NOCRT_FE_ROUND_MASK 0x0c00
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| 95 | #ifndef IPRT_NOCRT_WITHOUT_MATH_CONSTANTS
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| 96 | # define FE_TONEAREST RT_NOCRT_FE_TONEAREST
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| 97 | # define FE_DOWNWARD RT_NOCRT_FE_DOWNWARD
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| 98 | # define FE_UPWARD RT_NOCRT_FE_UPWARD
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| 99 | # define FE_TOWARDZERO RT_NOCRT_FE_TOWARDZERO
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| 100 | #endif
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| 101 | /** @} */
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| 102 |
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| 103 |
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| 104 | /** @name x87 Precision (same X86_FCW_PC_XXX)
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| 105 | * @{ */
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| 106 | #define RT_NOCRT_PC_FLOAT 0x0000
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| 107 | #define RT_NOCRT_PC_RSVD 0x0100
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| 108 | #define RT_NOCRT_PC_DOUBLE 0x0200
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| 109 | #define RT_NOCRT_PC_EXTENDED 0x0300
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| 110 | #define RT_NOCRT_PC_MASK 0x0300
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| 111 | /** @} */
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| 112 |
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| 113 |
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| 114 | /** @name Special environment pointer values.
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| 115 | * @note Only valid with fesetenv and feupdateenv.
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| 116 | * @note Defined as constants in fesetenv.asm.
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| 117 | * @{ */
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| 118 | /** The default FPU+SSE environment set, all exceptions disabled (masked). */
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| 119 | #define RT_NOCRT_FE_DFL_ENV ((RTNOCRTFENV const *)(intptr_t)1)
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| 120 | /** The default FPU+SSE environment set, but all exceptions enabled (unmasked)
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| 121 | * except for RT_NOCRT_FE_DENORMAL. */
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| 122 | #define RT_NOCRT_FE_NOMASK_ENV ((RTNOCRTFENV const *)(intptr_t)2)
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| 123 | /** The default FPU+SSE environment set, all exceptions disabled (masked),
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| 124 | * double precision (53 bit mantissa). */
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| 125 | #define RT_NOCRT_FE_PC53_ENV ((RTNOCRTFENV const *)(intptr_t)3)
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| 126 | /** The default FPU+SSE environment set, all exceptions disabled (masked),
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| 127 | * extended double precision (64 bit mantissa). */
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| 128 | #define RT_NOCRT_FE_PC64_ENV ((RTNOCRTFENV const *)(intptr_t)4)
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| 129 | #ifndef IPRT_NOCRT_WITHOUT_MATH_CONSTANTS
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| 130 | # define FE_DFL_ENV RT_NOCRT_FE_DFL_ENV
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| 131 | # define FE_NOMASK_ENV RT_NOCRT_FE_NOMASK_ENV
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| 132 | # define FE_PC53_ENV RT_NOCRT_FE_PC53_ENV
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| 133 | # define FE_PC64_ENV RT_NOCRT_FE_PC64_ENV
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| 134 | #endif
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| 135 | /** @} */
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| 136 |
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| 137 | RT_C_DECLS_BEGIN
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| 138 |
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| 139 | int RT_NOCRT(fegetenv)(RTNOCRTFENV *);
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| 140 | int RT_NOCRT(fesetenv)(RTNOCRTFENV const *);
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| 141 | int RT_NOCRT(feholdexcept)(RTNOCRTFENV *);
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| 142 | int RT_NOCRT(feupdateenv)(RTNOCRTFENV const *);
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| 143 |
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| 144 | int RT_NOCRT(fegetround)(void);
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| 145 | int RT_NOCRT(fesetround)(int);
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| 146 |
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| 147 | int RT_NOCRT(fegetexcept)(void);
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| 148 | int RT_NOCRT(feenableexcept)(int);
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| 149 | int RT_NOCRT(fedisableexcept)(int);
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| 150 |
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| 151 | int RT_NOCRT(feclearexcept)(int);
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| 152 | int RT_NOCRT(fetestexcept)(int);
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| 153 | int RT_NOCRT(fegetexceptflag)(RTNOCRTFEXCEPT *, int);
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| 154 | int RT_NOCRT(fesetexceptflag)(RTNOCRTFEXCEPT const *, int);
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| 155 |
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| 156 | int RT_NOCRT(feraiseexcept)(int);
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| 157 |
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| 158 | /* IPRT addition: */
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| 159 | int RT_NOCRT(fegetx87precision)(void);
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| 160 | int RT_NOCRT(fesetx87precision)(int);
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| 161 |
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| 162 | /* Underscored variants: */
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| 163 | int RT_NOCRT(_fegetenv)(RTNOCRTFENV *);
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| 164 | int RT_NOCRT(_fesetenv)(RTNOCRTFENV const *);
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| 165 | int RT_NOCRT(_feholdexcept)(RTNOCRTFENV *);
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| 166 | int RT_NOCRT(_feupdateenv)(RTNOCRTFENV const *);
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| 167 |
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| 168 | int RT_NOCRT(_fegetround)(void);
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| 169 | int RT_NOCRT(_fesetround)(int);
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| 170 |
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| 171 | int RT_NOCRT(_fegetexcept)(void);
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| 172 | int RT_NOCRT(_feenableexcept)(int);
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| 173 | int RT_NOCRT(_fedisableexcept)(int);
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| 174 |
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| 175 | int RT_NOCRT(_feclearexcept)(int);
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| 176 | int RT_NOCRT(_fetestexcept)(int);
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| 177 | int RT_NOCRT(_fegetexceptflag)(RTNOCRTFEXCEPT *, int);
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| 178 | int RT_NOCRT(_fesetexceptflag)(RTNOCRTFEXCEPT const *, int);
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| 179 |
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| 180 | int RT_NOCRT(_feraiseexcept)(int);
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| 181 |
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| 182 | /* Aliases: */
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| 183 | #if !defined(RT_WITHOUT_NOCRT_WRAPPERS) && !defined(RT_WITHOUT_NOCRT_WRAPPER_ALIASES)
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| 184 | # define fegetenv RT_NOCRT(fegetenv)
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| 185 | # define fesetenv RT_NOCRT(fesetenv)
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| 186 | # define feholdexcept RT_NOCRT(feholdexcept)
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| 187 | # define feupdateenv RT_NOCRT(feupdateenv)
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| 188 | # define fegetround RT_NOCRT(fegetround)
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| 189 | # define fesetround RT_NOCRT(fesetround)
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| 190 | # define fegetexcept RT_NOCRT(fegetexcept)
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| 191 | # define feenableexcept RT_NOCRT(feenableexcept)
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| 192 | # define fedisableexcept RT_NOCRT(fedisableexcept)
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| 193 | # define feclearexcept RT_NOCRT(feclearexcept)
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| 194 | # define fetestexcept RT_NOCRT(fetestexcept)
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| 195 | # define fegetexceptflag RT_NOCRT(fegetexceptflag)
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| 196 | # define fesetexceptflag RT_NOCRT(fesetexceptflag)
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| 197 | # define feraiseexcept RT_NOCRT(feraiseexcept)
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| 198 |
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| 199 | /* Underscored variants: */
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| 200 | # define _fegetenv RT_NOCRT(fegetenv)
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| 201 | # define _fesetenv RT_NOCRT(fesetenv)
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| 202 | # define _feholdexcept RT_NOCRT(feholdexcept)
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| 203 | # define _feupdateenv RT_NOCRT(feupdateenv)
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| 204 | # define _fegetround RT_NOCRT(fegetround)
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| 205 | # define _fesetround RT_NOCRT(fesetround)
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| 206 | # define _fegetexcept RT_NOCRT(fegetexcept)
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| 207 | # define _feenableexcept RT_NOCRT(feenableexcept)
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| 208 | # define _fedisableexcept RT_NOCRT(fedisableexcept)
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| 209 | # define _feclearexcept RT_NOCRT(feclearexcept)
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| 210 | # define _fetestexcept RT_NOCRT(fetestexcept)
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| 211 | # define _fegetexceptflag RT_NOCRT(fegetexceptflag)
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| 212 | # define _fesetexceptflag RT_NOCRT(fesetexceptflag)
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| 213 | # define _feraiseexcept RT_NOCRT(feraiseexcept)
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| 214 | #endif
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| 215 |
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| 216 | RT_C_DECLS_END
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| 217 |
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| 218 | #endif /* !IPRT_INCLUDED_nocrt_x86_fenv_x86_amd64_h */
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| 219 |
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