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- /* $OpenBSD: fenv.h,v 1.3 2011/05/25 21:46:49 martynas Exp $ */
- /* $NetBSD: fenv.h,v 1.1.2.2 2011/02/08 16:19:41 bouyer Exp $ */
- /*-
- * Copyright (c) 2004-2005 David Schultz <das@FreeBSD.ORG>
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * $FreeBSD$
- */
- #ifndef _SPARC_FENV_H_
- #define _SPARC_FENV_H_
- /*
- * Each symbol representing a floating point exception expands to an integer
- * constant expression with values, such that bitwise-inclusive ORs of _all
- * combinations_ of the constants result in distinct values.
- *
- * We use such values that allow direct bitwise operations on FPU registers.
- */
- #define FE_INEXACT 0x020
- #define FE_DIVBYZERO 0x040
- #define FE_UNDERFLOW 0x080
- #define FE_OVERFLOW 0x100
- #define FE_INVALID 0x200
- /*
- * The following symbol is simply the bitwise-inclusive OR of all floating-point
- * exception constants defined above.
- */
- #define FE_ALL_EXCEPT (FE_INEXACT | FE_DIVBYZERO | FE_UNDERFLOW | \
- FE_OVERFLOW | FE_INVALID)
- #define _MASK_SHIFT 18
- /*
- * Each symbol representing the rounding direction, expands to an integer
- * constant expression whose value is distinct non-negative value.
- *
- * We use such values that allow direct bitwise operations on FPU registers.
- */
- #define FE_TONEAREST 0x0
- #define FE_TOWARDZERO 0x1
- #define FE_UPWARD 0x2
- #define FE_DOWNWARD 0x3
- /*
- * The following symbol is simply the bitwise-inclusive OR of all floating-point
- * rounding direction constants defined above.
- */
- #define _ROUND_MASK (FE_TONEAREST | FE_TOWARDZERO | FE_UPWARD | \
- FE_DOWNWARD)
- #define _ROUND_SHIFT 30
- /*
- * fenv_t represents the entire floating-point environment.
- */
- typedef unsigned long fenv_t;
- /*
- * The following constant represents the default floating-point environment
- * (that is, the one installed at program startup) and has type pointer to
- * const-qualified fenv_t.
- *
- * It can be used as an argument to the functions within the <fenv.h> header
- * that manage the floating-point environment, namely fesetenv() and
- * feupdateenv().
- */
- __BEGIN_DECLS
- extern fenv_t __fe_dfl_env;
- __END_DECLS
- #define FE_DFL_ENV ((const fenv_t *)&__fe_dfl_env)
- /*
- * fexcept_t represents the floating-point status flags collectively, including
- * any status the implementation associates with the flags.
- *
- * A floating-point status flag is a system variable whose value is set (but
- * never cleared) when a floating-point exception is raised, which occurs as a
- * side effect of exceptional floating-point arithmetic to provide auxiliary
- * information.
- *
- * A floating-point control mode is a system variable whose value may be set by
- * the user to affect the subsequent behavior of floating-point arithmetic.
- */
- typedef unsigned long fexcept_t;
- #endif /* !_SPARC_FENV_H_ */
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