fenv.c revision 1.3.2.2
1 1.3.2.2 chs /* $NetBSD: fenv.c,v 1.3.2.2 2017/03/23 18:27:30 chs Exp $ */ 2 1.3.2.2 chs 3 1.3.2.2 chs /*- 4 1.3.2.2 chs * Copyright (c) 2004 David Schultz <das (at) FreeBSD.ORG> 5 1.3.2.2 chs * All rights reserved. 6 1.3.2.2 chs * 7 1.3.2.2 chs * Redistribution and use in source and binary forms, with or without 8 1.3.2.2 chs * modification, are permitted provided that the following conditions 9 1.3.2.2 chs * are met: 10 1.3.2.2 chs * 1. Redistributions of source code must retain the above copyright 11 1.3.2.2 chs * notice, this list of conditions and the following disclaimer. 12 1.3.2.2 chs * 2. Redistributions in binary form must reproduce the above copyright 13 1.3.2.2 chs * notice, this list of conditions and the following disclaimer in the 14 1.3.2.2 chs * documentation and/or other materials provided with the distribution. 15 1.3.2.2 chs * 16 1.3.2.2 chs * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 1.3.2.2 chs * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 1.3.2.2 chs * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 1.3.2.2 chs * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 1.3.2.2 chs * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 1.3.2.2 chs * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 1.3.2.2 chs * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 1.3.2.2 chs * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 1.3.2.2 chs * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 1.3.2.2 chs * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 1.3.2.2 chs * SUCH DAMAGE. 27 1.3.2.2 chs * 28 1.3.2.2 chs * $FreeBSD: releng/10.1/lib/msun/ia64/fenv.c 226415 2011-10-16 05:37:56Z das $ 29 1.3.2.2 chs */ 30 1.3.2.2 chs 31 1.3.2.2 chs #include <sys/cdefs.h> 32 1.3.2.2 chs __RCSID("$NetBSD: fenv.c,v 1.3.2.2 2017/03/23 18:27:30 chs Exp $"); 33 1.3.2.2 chs 34 1.3.2.2 chs #include "namespace.h" 35 1.3.2.2 chs 36 1.3.2.2 chs #define __fenv_static 37 1.3.2.2 chs #include <fenv.h> 38 1.3.2.2 chs 39 1.3.2.2 chs #ifdef __weak_alias 40 1.3.2.2 chs __weak_alias(feclearexcept,_feclearexcept) 41 1.3.2.2 chs __weak_alias(fedisableexcept,_fedisableexcept) 42 1.3.2.2 chs __weak_alias(feenableexcept,_feenableexcept) 43 1.3.2.2 chs __weak_alias(fegetenv,_fegetenv) 44 1.3.2.2 chs __weak_alias(fegetexcept,_fegetexcept) 45 1.3.2.2 chs __weak_alias(fegetexceptflag,_fegetexceptflag) 46 1.3.2.2 chs __weak_alias(fegetround,_fegetround) 47 1.3.2.2 chs __weak_alias(feholdexcept,_feholdexcept) 48 1.3.2.2 chs __weak_alias(feraiseexcept,_feraiseexcept) 49 1.3.2.2 chs __weak_alias(fesetenv,_fesetenv) 50 1.3.2.2 chs __weak_alias(fesetexceptflag,_fesetexceptflag) 51 1.3.2.2 chs __weak_alias(fesetround,_fesetround) 52 1.3.2.2 chs __weak_alias(fetestexcept,_fetestexcept) 53 1.3.2.2 chs __weak_alias(feupdateenv,_feupdateenv) 54 1.3.2.2 chs #endif 55 1.3.2.2 chs 56 1.3.2.2 chs #if defined(__GNUC_GNU_INLINE__) && !defined(__lint__) 57 1.3.2.2 chs #error "This file must be compiled with C99 'inline' semantics" 58 1.3.2.2 chs #endif 59 1.3.2.2 chs 60 1.3.2.2 chs const fenv_t __fe_dfl_env = 0x0009804c8a70033fULL; 61 1.3.2.2 chs 62 1.3.2.2 chs extern inline int feclearexcept(int __excepts); 63 1.3.2.2 chs extern inline int fegetexceptflag(fexcept_t *__flagp, int __excepts); 64 1.3.2.2 chs extern inline int fesetexceptflag(const fexcept_t *__flagp, int __excepts); 65 1.3.2.2 chs extern inline int feraiseexcept(int __excepts); 66 1.3.2.2 chs extern inline int fetestexcept(int __excepts); 67 1.3.2.2 chs extern inline int fegetround(void); 68 1.3.2.2 chs extern inline int fesetround(int __round); 69 1.3.2.2 chs extern inline int fegetenv(fenv_t *__envp); 70 1.3.2.2 chs extern inline int feholdexcept(fenv_t *__envp); 71 1.3.2.2 chs extern inline int fesetenv(const fenv_t *__envp); 72 1.3.2.2 chs extern inline int feenableexcept(int __excepts); 73 1.3.2.2 chs extern inline int fedisableexcept(int __excepts); 74 1.3.2.2 chs extern inline int fegetexcept(void); 75 1.3.2.2 chs 76 1.3.2.2 chs /* 77 1.3.2.2 chs * It doesn't pay to inline feupdateenv() because it includes one of 78 1.3.2.2 chs * the rare uses of feraiseexcept() where the argument is not a 79 1.3.2.2 chs * constant. Thus, no dead code elimination can occur, resulting in 80 1.3.2.2 chs * significant bloat. 81 1.3.2.2 chs */ 82 1.3.2.2 chs int 83 1.3.2.2 chs feupdateenv(const fenv_t *envp) 84 1.3.2.2 chs { 85 1.3.2.2 chs fenv_t fpsr; 86 1.3.2.2 chs 87 1.3.2.2 chs __stfpsr(&fpsr); 88 1.3.2.2 chs __ldfpsr(*envp); 89 1.3.2.2 chs feraiseexcept((fpsr >> _FPUSW_SHIFT) & FE_ALL_EXCEPT); 90 1.3.2.2 chs return (0); 91 1.3.2.2 chs } 92
Indexes created Tue Sep 30 20:09:53 GMT 2025