Home | History | Annotate | Line # | Download | only in ia64 
      1 /*	$NetBSD: fenv.c,v 1.3 2017/03/23 18:27:29 chs Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2004 David Schultz <das (at) 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