9cf6036048
Now the NDK doesn't support API levels below 21, we don't actually need the different arm32 vs x86 annotations. In general we haven't been removing this historical information because it might be interesting to someone, and there's no real reason to remove it, but we've had versioner bugs recently with these more complex cases. Test: treehugger Change-Id: I9460109a2648b9d05d7e21e397935293d3fea8eb
182 lines
6.1 KiB
C
182 lines
6.1 KiB
C
/* $OpenBSD: fenv.h,v 1.2 2011/05/25 21:46:49 martynas Exp $ */
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/* $NetBSD: fenv.h,v 1.2.4.1 2011/02/08 16:18:55 bouyer Exp $ */
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/*
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* Copyright (c) 2010 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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/**
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* @file fenv.h
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* @brief Floating-point environment.
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*/
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#include <sys/cdefs.h>
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#if defined(__aarch64__) || defined(__arm__)
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#include <bits/fenv_arm.h>
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#elif defined(__i386__)
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#include <bits/fenv_x86.h>
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#elif defined(__riscv)
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#include <bits/fenv_riscv64.h>
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#elif defined(__x86_64__)
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#include <bits/fenv_x86_64.h>
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#endif
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__BEGIN_DECLS
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/**
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* [feclearexcept(3)](http://man7.org/linux/man-pages/man3/feclearexcept.3.html)
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* clears the given `exceptions` in hardware.
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*
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* Returns 0 on success, and returns non-zero on failure.
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*/
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int feclearexcept(int __exceptions);
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/**
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* [fegetexceptflag(3)](http://man7.org/linux/man-pages/man3/fegetexceptflag.3.html)
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* copies the state of the given `exceptions` from hardware into `*flag_ptr`.
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* See fesetexceptflag().
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*
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* Returns 0 on success, and returns non-zero on failure.
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*/
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int fegetexceptflag(fexcept_t* _Nonnull __flag_ptr, int __exceptions);
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/**
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* [feraiseexcept(3)](http://man7.org/linux/man-pages/man3/feraiseexcept.3.html)
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* raises the given `exceptions` in hardware.
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*
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* Returns 0 on success, and returns non-zero on failure.
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*/
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int feraiseexcept(int __exceptions);
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/**
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* [fesetexceptflag(3)](http://man7.org/linux/man-pages/man3/fesetexceptflag.3.html)
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* copies the state of the given `exceptions` from `*flag_ptr` into hardware.
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* See fesetexceptflag().
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*
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* Returns 0 on success, and returns non-zero on failure.
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*/
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int fesetexceptflag(const fexcept_t* _Nonnull __flag_ptr, int __exceptions);
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/**
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* [fetestexcept(3)](http://man7.org/linux/man-pages/man3/fetestexcept.3.html)
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* tests whether the given `exceptions` are set in hardware.
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*
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* Returns the currently-set subset of `exceptions`.
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*/
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int fetestexcept(int __exceptions);
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/**
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* [fegetround(3)](http://man7.org/linux/man-pages/man3/fegetround.3.html)
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* returns the current rounding mode.
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*
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* Returns the rounding mode on success, and returns a negative value on failure.
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*/
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int fegetround(void);
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/**
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* [fesetround(3)](http://man7.org/linux/man-pages/man3/fesetround.3.html)
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* sets the current rounding mode.
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*
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* Returns 0 on success, and returns non-zero on failure.
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*/
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int fesetround(int __rounding_mode);
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/**
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* [fegetenv(3)](http://man7.org/linux/man-pages/man3/fegetenv.3.html)
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* gets the current floating-point environment. See fesetenv().
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*
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* Returns 0 on success, and returns non-zero on failure.
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*/
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int fegetenv(fenv_t* _Nonnull __env);
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/**
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* [feholdexcept(3)](http://man7.org/linux/man-pages/man3/feholdexcept.3.html)
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* gets the current floating-point environment, clears the status flags, and
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* ignores floating point exceptions. See fesetenv()/feupdateenv().
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*
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* Returns 0 on success, and returns non-zero on failure.
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*/
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int feholdexcept(fenv_t* _Nonnull __env);
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/**
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* [fesetenv(3)](http://man7.org/linux/man-pages/man3/fesetenv.3.html)
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* sets the current floating-point environment. See fegetenv().
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*
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* Returns 0 on success, and returns non-zero on failure.
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*/
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int fesetenv(const fenv_t* _Nonnull __env);
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/**
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* [feupdateenv(3)](http://man7.org/linux/man-pages/man3/feupdateenv.3.html)
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* sets the current floating-point environment to `*env` but with currently-raised
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* exceptions still raised. See fesetenv().
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*
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* Returns 0 on success, and returns non-zero on failure.
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*/
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int feupdateenv(const fenv_t* _Nonnull __env);
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/**
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* [feenableexcept(3)](http://man7.org/linux/man-pages/man3/feenableexcept.3.html)
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* sets the given `exceptions` to trap, if the hardware supports it. This is not
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* generally useful on Android, because only x86/x86-64 can trap.
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*
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* Returns the previous set of enabled exceptions on success, and returns -1 on failure.
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*/
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int feenableexcept(int __exceptions);
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/**
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* [fedisableexcept(3)](http://man7.org/linux/man-pages/man3/fedisableexcept.3.html)
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* sets the given `exceptions` to not trap, if the hardware supports it. This is not
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* generally useful on Android, because only x86/x86-64 can trap.
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*
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* Returns the previous set of enabled exceptions on success, and returns -1 on failure.
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*/
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int fedisableexcept(int __exceptions);
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/**
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* [fegetexcept(3)](http://man7.org/linux/man-pages/man3/fegetexcept.3.html)
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* returns the exceptions that currently trap. This is not generally useful on
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* Android, because only x86/x86-64 can trap.
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*
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* Returns the exceptions that currently trap.
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*/
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int fegetexcept(void);
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/** See FE_DFL_ENV. */
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extern const fenv_t __fe_dfl_env;
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/**
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* Constant representing the default floating-point environment
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* (that is, the one installed at program startup).
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*
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* It can be used as an argument to the functions that manage the floating-point
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* environment, namely fesetenv() and feupdateenv().
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*/
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#define FE_DFL_ENV (&__fe_dfl_env)
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__END_DECLS
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