1 /* $NetBSD: fenv.c,v 1.3 2017/03/23 18:27:29 chs Exp $ */ 2 3 /*- 4 * Copyright (c) 2004 David Schultz <das@FreeBSD.ORG> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD: releng/10.1/lib/msun/ia64/fenv.c 226415 2011-10-16 05:37:56Z das $ 29 */ 30 31 #include <sys/cdefs.h> 32 __RCSID("$NetBSD: fenv.c,v 1.3 2017/03/23 18:27:29 chs Exp $"); 33 34 #include "namespace.h" 35 36 #define __fenv_static 37 #include <fenv.h> 38 39 #ifdef __weak_alias 40 __weak_alias(feclearexcept,_feclearexcept) 41 __weak_alias(fedisableexcept,_fedisableexcept) 42 __weak_alias(feenableexcept,_feenableexcept) 43 __weak_alias(fegetenv,_fegetenv) 44 __weak_alias(fegetexcept,_fegetexcept) 45 __weak_alias(fegetexceptflag,_fegetexceptflag) 46 __weak_alias(fegetround,_fegetround) 47 __weak_alias(feholdexcept,_feholdexcept) 48 __weak_alias(feraiseexcept,_feraiseexcept) 49 __weak_alias(fesetenv,_fesetenv) 50 __weak_alias(fesetexceptflag,_fesetexceptflag) 51 __weak_alias(fesetround,_fesetround) 52 __weak_alias(fetestexcept,_fetestexcept) 53 __weak_alias(feupdateenv,_feupdateenv) 54 #endif 55 56 #if defined(__GNUC_GNU_INLINE__) && !defined(__lint__) 57 #error "This file must be compiled with C99 'inline' semantics" 58 #endif 59 60 const fenv_t __fe_dfl_env = 0x0009804c8a70033fULL; 61 62 extern inline int feclearexcept(int __excepts); 63 extern inline int fegetexceptflag(fexcept_t *__flagp, int __excepts); 64 extern inline int fesetexceptflag(const fexcept_t *__flagp, int __excepts); 65 extern inline int feraiseexcept(int __excepts); 66 extern inline int fetestexcept(int __excepts); 67 extern inline int fegetround(void); 68 extern inline int fesetround(int __round); 69 extern inline int fegetenv(fenv_t *__envp); 70 extern inline int feholdexcept(fenv_t *__envp); 71 extern inline int fesetenv(const fenv_t *__envp); 72 extern inline int feenableexcept(int __excepts); 73 extern inline int fedisableexcept(int __excepts); 74 extern inline int fegetexcept(void); 75 76 /* 77 * It doesn't pay to inline feupdateenv() because it includes one of 78 * the rare uses of feraiseexcept() where the argument is not a 79 * constant. Thus, no dead code elimination can occur, resulting in 80 * significant bloat. 81 */ 82 int 83 feupdateenv(const fenv_t *envp) 84 { 85 fenv_t fpsr; 86 87 __stfpsr(&fpsr); 88 __ldfpsr(*envp); 89 feraiseexcept((fpsr >> _FPUSW_SHIFT) & FE_ALL_EXCEPT); 90 return (0); 91 } 92