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      1 /*-
      2  * Copyright (c) 2004-2005 David Schultz <das (at) FreeBSD.ORG>
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  *
     14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     24  * SUCH DAMAGE.
     25  *
     26  * $FreeBSD: src/lib/msun/i387/fenv.h,v 1.4 2005/03/17 22:21:46 das Exp $
     27  */
     28 
     29 #ifndef _I387_FENV_H_
     30 #define _I387_FENV_H_
     31 
     32 #include <sys/types.h>
     33 
     34 __BEGIN_DECLS
     35 
     36 /*
     37  * To preserve binary compatibility with FreeBSD 5.3, we pack the
     38  * mxcsr into some reserved fields, rather than changing sizeof(fenv_t).
     39  */
     40 typedef struct {
     41   __uint16_t __control;
     42   __uint16_t __mxcsr_hi;
     43   __uint16_t __status;
     44   __uint16_t __mxcsr_lo;
     45   __uint32_t __tag;
     46   char       __other[16];
     47 } fenv_t;
     48 
     49 typedef __uint16_t fexcept_t;
     50 
     51 /* Exception flags */
     52 #define FE_INVALID    0x01
     53 #define FE_DENORMAL   0x02
     54 #define FE_DIVBYZERO  0x04
     55 #define FE_OVERFLOW   0x08
     56 #define FE_UNDERFLOW  0x10
     57 #define FE_INEXACT    0x20
     58 #define FE_ALL_EXCEPT (FE_DIVBYZERO | FE_DENORMAL | FE_INEXACT | \
     59                        FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW)
     60 
     61 /* Rounding modes */
     62 #define FE_TONEAREST  0x0000
     63 #define FE_DOWNWARD   0x0400
     64 #define FE_UPWARD     0x0800
     65 #define FE_TOWARDZERO 0x0c00
     66 
     67 __END_DECLS
     68 
     69 #endif /* !I387_FENV_H_ */
     70