sys/arch/x86/include/ieeefp.h

   1 /*      $NetBSD: ieeefp.h,v 1.1 2003/02/26 21:26:10 fvdl Exp $  */
   2
   3 /*
   4  * Written by J.T. Conklin, Apr 6, 1995
   5  * Public domain.
   6  */
   7
   8 #ifndef _X86_IEEEFP_H_
   9 #define _X86_IEEEFP_H_
  10
  11 #include <sys/featuretest.h>
  12
  13 #if defined(_NETBSD_SOURCE) || defined(_ISOC99_SOURCE)
  14
  15 typedef int fenv_t;
  16 typedef int fexcept_t;
  17
  18 #define FE_INVALID      0x01    /* invalid operation exception */
  19 #define FE_DENORMAL     0x02    /* denormalization exception */
  20 #define FE_DIVBYZERO    0x04    /* divide-by-zero exception */
  21 #define FE_OVERFLOW     0x08    /* underflow exception */
  22 #define FE_UNDERFLOW    0x10    /* overflow exception */
  23 #define FE_INEXACT      0x20    /* imprecise (loss of precision) */
  24
  25 #define FE_ALL_EXCEPT   0x3f
  26
  27 #define FE_TONEAREST    0       /* round to nearest representable number */
  28 #define FE_DOWNWARD     1       /* round toward negative infinity */
  29 #define FE_UPWARD       2       /* round toward positive infinity */
  30 #define FE_TOWARDZERO   3       /* round to zero (truncate) */
  31
  32 #if !defined(_ISOC99_SOURCE)
  33
  34 typedef int fp_except;
  35 #define FP_X_INV        FE_INVALID      /* invalid operation exception */
  36 #define FP_X_DNML       FE_DENORMAL     /* denormalization exception */
  37 #define FP_X_DZ         FE_DIVBYZERO    /* divide-by-zero exception */
  38 #define FP_X_OFL        FE_OVERFLOW     /* overflow exception */
  39 #define FP_X_UFL        FE_UNDERFLOW    /* underflow exception */
  40 #define FP_X_IMP        FE_INEXACT      /* imprecise (loss of precision) */
  41
  42 typedef enum {
  43     FP_RN=FE_TONEAREST,         /* round to nearest representable number */
  44     FP_RM=FE_DOWNWARD,          /* round toward negative infinity */
  45     FP_RP=FE_UPWARD,            /* round toward positive infinity */
  46     FP_RZ=FE_TOWARDZERO         /* round to zero (truncate) */
  47 } fp_rnd;
  48
  49 #endif /* !_ISOC99_SOURCE */
  50
  51 #endif /* _NETBSD_SOURCE || _ISOC99_SOURCE */
  52
  53 #endif /* _X86_IEEEFP_H_ */