1/* $OpenBSD: fenv.h,v 1.4 2011/05/25 21:46:49 martynas Exp $ */ 2/* $NetBSD: fenv.h,v 1.1.2.2 2011/02/08 16:19:41 bouyer Exp $ */ 3 4/*- 5 * Copyright (c) 2004-2005 David Schultz <das@FreeBSD.ORG> 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD$ 30 */ 31 32#ifndef _SPARC64_FENV_H_ 33#define _SPARC64_FENV_H_ 34 35/* 36 * Each symbol representing a floating point exception expands to an integer 37 * constant expression with values, such that bitwise-inclusive ORs of _all 38 * combinations_ of the constants result in distinct values. 39 * 40 * We use such values that allow direct bitwise operations on FPU registers. 41 */ 42#define FE_INEXACT 0x020 43#define FE_DIVBYZERO 0x040 44#define FE_UNDERFLOW 0x080 45#define FE_OVERFLOW 0x100 46#define FE_INVALID 0x200 47 48/* 49 * The following symbol is simply the bitwise-inclusive OR of all floating-point 50 * exception constants defined above. 51 */ 52#define FE_ALL_EXCEPT (FE_INEXACT | FE_DIVBYZERO | FE_UNDERFLOW | \ 53 FE_OVERFLOW | FE_INVALID) 54#define _MASK_SHIFT 18 55 56/* 57 * Each symbol representing the rounding direction, expands to an integer 58 * constant expression whose value is distinct non-negative value. 59 * 60 * We use such values that allow direct bitwise operations on FPU registers. 61 */ 62#define FE_TONEAREST 0x0 63#define FE_TOWARDZERO 0x1 64#define FE_UPWARD 0x2 65#define FE_DOWNWARD 0x3 66 67/* 68 * The following symbol is simply the bitwise-inclusive OR of all floating-point 69 * rounding direction constants defined above. 70 */ 71#define _ROUND_MASK (FE_TONEAREST | FE_TOWARDZERO | FE_UPWARD | \ 72 FE_DOWNWARD) 73#define _ROUND_SHIFT 30 74 75/* 76 * fenv_t represents the entire floating-point environment. 77 */ 78typedef unsigned long fenv_t; 79 80/* 81 * The following constant represents the default floating-point environment 82 * (that is, the one installed at program startup) and has type pointer to 83 * const-qualified fenv_t. 84 * 85 * It can be used as an argument to the functions within the <fenv.h> header 86 * that manage the floating-point environment, namely fesetenv() and 87 * feupdateenv(). 88 */ 89__BEGIN_DECLS 90extern fenv_t __fe_dfl_env; 91__END_DECLS 92#define FE_DFL_ENV ((const fenv_t *)&__fe_dfl_env) 93 94/* 95 * fexcept_t represents the floating-point status flags collectively, including 96 * any status the implementation associates with the flags. 97 * 98 * A floating-point status flag is a system variable whose value is set (but 99 * never cleared) when a floating-point exception is raised, which occurs as a 100 * side effect of exceptional floating-point arithmetic to provide auxiliary 101 * information. 102 * 103 * A floating-point control mode is a system variable whose value may be set by 104 * the user to affect the subsequent behavior of floating-point arithmetic. 105 */ 106typedef unsigned long fexcept_t; 107 108#endif /* !_SPARC64_FENV_H_ */ 109