170725500dcf3b666b43d50563d64705aab58d2d3Igor Murashkin/*- 270725500dcf3b666b43d50563d64705aab58d2d3Igor Murashkin * Copyright (c) 2004-2005 David Schultz <das (at) FreeBSD.ORG> 370725500dcf3b666b43d50563d64705aab58d2d3Igor Murashkin * All rights reserved. 470725500dcf3b666b43d50563d64705aab58d2d3Igor Murashkin * 570725500dcf3b666b43d50563d64705aab58d2d3Igor Murashkin * Redistribution and use in source and binary forms, with or without 670725500dcf3b666b43d50563d64705aab58d2d3Igor Murashkin * modification, are permitted provided that the following conditions 770725500dcf3b666b43d50563d64705aab58d2d3Igor Murashkin * are met: 870725500dcf3b666b43d50563d64705aab58d2d3Igor Murashkin * 1. Redistributions of source code must retain the above copyright 970725500dcf3b666b43d50563d64705aab58d2d3Igor Murashkin * notice, this list of conditions and the following disclaimer. 1070725500dcf3b666b43d50563d64705aab58d2d3Igor Murashkin * 2. Redistributions in binary form must reproduce the above copyright 1170725500dcf3b666b43d50563d64705aab58d2d3Igor Murashkin * notice, this list of conditions and the following disclaimer in the 1270725500dcf3b666b43d50563d64705aab58d2d3Igor Murashkin * documentation and/or other materials provided with the distribution. 1370725500dcf3b666b43d50563d64705aab58d2d3Igor Murashkin * 1470725500dcf3b666b43d50563d64705aab58d2d3Igor Murashkin * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 1570725500dcf3b666b43d50563d64705aab58d2d3Igor Murashkin * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1670725500dcf3b666b43d50563d64705aab58d2d3Igor Murashkin * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 1770725500dcf3b666b43d50563d64705aab58d2d3Igor Murashkin * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 1870725500dcf3b666b43d50563d64705aab58d2d3Igor Murashkin * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 1970725500dcf3b666b43d50563d64705aab58d2d3Igor Murashkin * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2070725500dcf3b666b43d50563d64705aab58d2d3Igor Murashkin * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21b7bfdc7cf7f45805e8e7ebea77a15051b8ad3e8dZhijun He * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 223710db80d4b9e573d775790e4c9a2ab6e062201eIgor Murashkin * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23b7bfdc7cf7f45805e8e7ebea77a15051b8ad3e8dZhijun He * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24b7bfdc7cf7f45805e8e7ebea77a15051b8ad3e8dZhijun He * SUCH DAMAGE. 25b7bfdc7cf7f45805e8e7ebea77a15051b8ad3e8dZhijun He */ 262f1a2e423e0fbb64467d6fcfa4e82c6384f31210Eino-Ville Talvala 272f1a2e423e0fbb64467d6fcfa4e82c6384f31210Eino-Ville Talvala#ifndef _AMD64_FENV_H_ 2870c2207c34cf0e6b3b383b1b1500ff5385aa51a6Eino-Ville Talvala#define _AMD64_FENV_H_ 29b519cc52ecba8f44da31173c9fc90a7b66d52b79Igor Murashkin 3070c2207c34cf0e6b3b383b1b1500ff5385aa51a6Eino-Ville Talvala#include <sys/types.h> 31b519cc52ecba8f44da31173c9fc90a7b66d52b79Igor Murashkin 32b519cc52ecba8f44da31173c9fc90a7b66d52b79Igor Murashkin__BEGIN_DECLS 33b519cc52ecba8f44da31173c9fc90a7b66d52b79Igor Murashkin 34b519cc52ecba8f44da31173c9fc90a7b66d52b79Igor Murashkin/* 3570725500dcf3b666b43d50563d64705aab58d2d3Igor Murashkin * Each symbol representing a floating point exception expands to an integer 3670725500dcf3b666b43d50563d64705aab58d2d3Igor Murashkin * constant expression with values, such that bitwise-inclusive ORs of _all 3770725500dcf3b666b43d50563d64705aab58d2d3Igor Murashkin * combinations_ of the constants result in distinct values. 3870725500dcf3b666b43d50563d64705aab58d2d3Igor Murashkin * 3970725500dcf3b666b43d50563d64705aab58d2d3Igor Murashkin * We use such values that allow direct bitwise operations on FPU/SSE registers. 4070725500dcf3b666b43d50563d64705aab58d2d3Igor Murashkin */ 4170725500dcf3b666b43d50563d64705aab58d2d3Igor Murashkin#define FE_INVALID 0x01 4270725500dcf3b666b43d50563d64705aab58d2d3Igor Murashkin#define FE_DENORMAL 0x02 4370725500dcf3b666b43d50563d64705aab58d2d3Igor Murashkin#define FE_DIVBYZERO 0x04 4470725500dcf3b666b43d50563d64705aab58d2d3Igor Murashkin#define FE_OVERFLOW 0x08 4570c2207c34cf0e6b3b383b1b1500ff5385aa51a6Eino-Ville Talvala#define FE_UNDERFLOW 0x10 4670725500dcf3b666b43d50563d64705aab58d2d3Igor Murashkin#define FE_INEXACT 0x20 4770725500dcf3b666b43d50563d64705aab58d2d3Igor Murashkin 48b519cc52ecba8f44da31173c9fc90a7b66d52b79Igor Murashkin/* 49b519cc52ecba8f44da31173c9fc90a7b66d52b79Igor Murashkin * The following symbol is simply the bitwise-inclusive OR of all floating-point 50b519cc52ecba8f44da31173c9fc90a7b66d52b79Igor Murashkin * exception constants defined above. 51b519cc52ecba8f44da31173c9fc90a7b66d52b79Igor Murashkin */ 52b519cc52ecba8f44da31173c9fc90a7b66d52b79Igor Murashkin#define FE_ALL_EXCEPT (FE_INVALID | FE_DENORMAL | FE_DIVBYZERO | \ 53b519cc52ecba8f44da31173c9fc90a7b66d52b79Igor Murashkin FE_OVERFLOW | FE_UNDERFLOW | FE_INEXACT) 54b519cc52ecba8f44da31173c9fc90a7b66d52b79Igor Murashkin 55b519cc52ecba8f44da31173c9fc90a7b66d52b79Igor Murashkin/* 56b519cc52ecba8f44da31173c9fc90a7b66d52b79Igor Murashkin * Each symbol representing the rounding direction, expands to an integer 57b519cc52ecba8f44da31173c9fc90a7b66d52b79Igor Murashkin * constant expression whose value is distinct non-negative value. 58b519cc52ecba8f44da31173c9fc90a7b66d52b79Igor Murashkin * 59b7bfdc7cf7f45805e8e7ebea77a15051b8ad3e8dZhijun He * We use such values that allow direct bitwise operations on FPU/SSE registers. 60b519cc52ecba8f44da31173c9fc90a7b66d52b79Igor Murashkin */ 61b519cc52ecba8f44da31173c9fc90a7b66d52b79Igor Murashkin#define FE_TONEAREST 0x000 62b519cc52ecba8f44da31173c9fc90a7b66d52b79Igor Murashkin#define FE_DOWNWARD 0x400 63b519cc52ecba8f44da31173c9fc90a7b66d52b79Igor Murashkin#define FE_UPWARD 0x800 6470725500dcf3b666b43d50563d64705aab58d2d3Igor Murashkin#define FE_TOWARDZERO 0xc00 6570725500dcf3b666b43d50563d64705aab58d2d3Igor Murashkin 6670c2207c34cf0e6b3b383b1b1500ff5385aa51a6Eino-Ville Talvala/* 6770725500dcf3b666b43d50563d64705aab58d2d3Igor Murashkin * fenv_t represents the entire floating-point environment. 6870725500dcf3b666b43d50563d64705aab58d2d3Igor Murashkin */ 6970725500dcf3b666b43d50563d64705aab58d2d3Igor Murashkintypedef struct { 7070725500dcf3b666b43d50563d64705aab58d2d3Igor Murashkin struct { 7170725500dcf3b666b43d50563d64705aab58d2d3Igor Murashkin __uint32_t __control; /* Control word register */ 7270725500dcf3b666b43d50563d64705aab58d2d3Igor Murashkin __uint32_t __status; /* Status word register */ 7370725500dcf3b666b43d50563d64705aab58d2d3Igor Murashkin __uint32_t __tag; /* Tag word register */ 7470725500dcf3b666b43d50563d64705aab58d2d3Igor Murashkin __uint32_t __others[4]; /* EIP, Pointer Selector, etc */ 7570725500dcf3b666b43d50563d64705aab58d2d3Igor Murashkin } __x87; 7670725500dcf3b666b43d50563d64705aab58d2d3Igor Murashkin __uint32_t __mxcsr; /* Control, status register */ 7770725500dcf3b666b43d50563d64705aab58d2d3Igor Murashkin} fenv_t; 7870725500dcf3b666b43d50563d64705aab58d2d3Igor Murashkin 7970725500dcf3b666b43d50563d64705aab58d2d3Igor Murashkin/* 8070725500dcf3b666b43d50563d64705aab58d2d3Igor Murashkin * fexcept_t represents the floating-point status flags collectively, including 8170725500dcf3b666b43d50563d64705aab58d2d3Igor Murashkin * any status the implementation associates with the flags. 8270725500dcf3b666b43d50563d64705aab58d2d3Igor Murashkin * 8370725500dcf3b666b43d50563d64705aab58d2d3Igor Murashkin * A floating-point status flag is a system variable whose value is set (but 8470725500dcf3b666b43d50563d64705aab58d2d3Igor Murashkin * never cleared) when a floating-point exception is raised, which occurs as a 85b519cc52ecba8f44da31173c9fc90a7b66d52b79Igor Murashkin * side effect of exceptional floating-point arithmetic to provide auxiliary 86b519cc52ecba8f44da31173c9fc90a7b66d52b79Igor Murashkin * information. 87b519cc52ecba8f44da31173c9fc90a7b66d52b79Igor Murashkin * 88b519cc52ecba8f44da31173c9fc90a7b66d52b79Igor Murashkin * A floating-point control mode is a system variable whose value may be set by 89b519cc52ecba8f44da31173c9fc90a7b66d52b79Igor Murashkin * the user to affect the subsequent behavior of floating-point arithmetic. 9070c2207c34cf0e6b3b383b1b1500ff5385aa51a6Eino-Ville Talvala */ 91b519cc52ecba8f44da31173c9fc90a7b66d52b79Igor Murashkintypedef __uint32_t fexcept_t; 9270c2207c34cf0e6b3b383b1b1500ff5385aa51a6Eino-Ville Talvala 93b519cc52ecba8f44da31173c9fc90a7b66d52b79Igor Murashkin__END_DECLS 9470c2207c34cf0e6b3b383b1b1500ff5385aa51a6Eino-Ville Talvala 95b519cc52ecba8f44da31173c9fc90a7b66d52b79Igor Murashkin#endif /* !_AMD64_FENV_H_ */ 9670c2207c34cf0e6b3b383b1b1500ff5385aa51a6Eino-Ville Talvala