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fenv.c revision 1.1.2.2 
      1  1.1.2.2  pgoyette /*	$NetBSD: fenv.c,v 1.1.2.2 2017/03/20 06:56:59 pgoyette Exp $	*/
      2  1.1.2.2  pgoyette 
      3  1.1.2.2  pgoyette /*-
      4  1.1.2.2  pgoyette  * Copyright (c) 2004 David Schultz <das (at) FreeBSD.ORG>
      5  1.1.2.2  pgoyette  * All rights reserved.
      6  1.1.2.2  pgoyette  *
      7  1.1.2.2  pgoyette  * Redistribution and use in source and binary forms, with or without
      8  1.1.2.2  pgoyette  * modification, are permitted provided that the following conditions
      9  1.1.2.2  pgoyette  * are met:
     10  1.1.2.2  pgoyette  * 1. Redistributions of source code must retain the above copyright
     11  1.1.2.2  pgoyette  *    notice, this list of conditions and the following disclaimer.
     12  1.1.2.2  pgoyette  * 2. Redistributions in binary form must reproduce the above copyright
     13  1.1.2.2  pgoyette  *    notice, this list of conditions and the following disclaimer in the
     14  1.1.2.2  pgoyette  *    documentation and/or other materials provided with the distribution.
     15  1.1.2.2  pgoyette  *
     16  1.1.2.2  pgoyette  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     17  1.1.2.2  pgoyette  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     18  1.1.2.2  pgoyette  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     19  1.1.2.2  pgoyette  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     20  1.1.2.2  pgoyette  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     21  1.1.2.2  pgoyette  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     22  1.1.2.2  pgoyette  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     23  1.1.2.2  pgoyette  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     24  1.1.2.2  pgoyette  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  1.1.2.2  pgoyette  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  1.1.2.2  pgoyette  * SUCH DAMAGE.
     27  1.1.2.2  pgoyette  *
     28  1.1.2.2  pgoyette  * $FreeBSD: releng/10.1/lib/msun/ia64/fenv.c 226415 2011-10-16 05:37:56Z das $
     29  1.1.2.2  pgoyette  */
     30  1.1.2.2  pgoyette 
     31  1.1.2.2  pgoyette #include <sys/cdefs.h>
     32  1.1.2.2  pgoyette __RCSID("$NetBSD: fenv.c,v 1.1.2.2 2017/03/20 06:56:59 pgoyette Exp $");
     33  1.1.2.2  pgoyette 
     34  1.1.2.2  pgoyette #define	__fenv_static
     35  1.1.2.2  pgoyette #include "fenv.h"
     36  1.1.2.2  pgoyette 
     37  1.1.2.2  pgoyette #if defined(__GNUC_GNU_INLINE__) && !defined(__lint__)
     38  1.1.2.2  pgoyette #error "This file must be compiled with C99 'inline' semantics"
     39  1.1.2.2  pgoyette #endif
     40  1.1.2.2  pgoyette 
     41  1.1.2.2  pgoyette const fenv_t __fe_dfl_env = 0x0009804c8a70033fULL;
     42  1.1.2.2  pgoyette 
     43  1.1.2.2  pgoyette extern inline int feclearexcept(int __excepts);
     44  1.1.2.2  pgoyette extern inline int fegetexceptflag(fexcept_t *__flagp, int __excepts);
     45  1.1.2.2  pgoyette extern inline int fesetexceptflag(const fexcept_t *__flagp, int __excepts);
     46  1.1.2.2  pgoyette extern inline int feraiseexcept(int __excepts);
     47  1.1.2.2  pgoyette extern inline int fetestexcept(int __excepts);
     48  1.1.2.2  pgoyette extern inline int fegetround(void);
     49  1.1.2.2  pgoyette extern inline int fesetround(int __round);
     50  1.1.2.2  pgoyette extern inline int fegetenv(fenv_t *__envp);
     51  1.1.2.2  pgoyette extern inline int feholdexcept(fenv_t *__envp);
     52  1.1.2.2  pgoyette extern inline int fesetenv(const fenv_t *__envp);
     53  1.1.2.2  pgoyette 
     54  1.1.2.2  pgoyette /*
     55  1.1.2.2  pgoyette  * It doesn't pay to inline feupdateenv() because it includes one of
     56  1.1.2.2  pgoyette  * the rare uses of feraiseexcept() where the argument is not a
     57  1.1.2.2  pgoyette  * constant.  Thus, no dead code elimination can occur, resulting in
     58  1.1.2.2  pgoyette  * significant bloat.
     59  1.1.2.2  pgoyette  */
     60  1.1.2.2  pgoyette int
     61  1.1.2.2  pgoyette feupdateenv(const fenv_t *envp)
     62  1.1.2.2  pgoyette {
     63  1.1.2.2  pgoyette 	fenv_t fpsr;
     64  1.1.2.2  pgoyette 
     65  1.1.2.2  pgoyette 	__stfpsr(&fpsr);
     66  1.1.2.2  pgoyette 	__ldfpsr(*envp);
     67  1.1.2.2  pgoyette 	feraiseexcept((fpsr >> _FPUSW_SHIFT) & FE_ALL_EXCEPT);
     68  1.1.2.2  pgoyette 	return (0);
     69  1.1.2.2  pgoyette }
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