StdLib/Include/Aarch64/machine/fenv.h

   1 /*  $NetBSD: fenv.h,v 1.2 2014/01/29 00:22:09 matt Exp $    */
   2
   3 /*
   4  * Based on ieeefp.h written by J.T. Conklin, Apr 28, 1995
   5  * Public domain.
   6  */
   7
   8 #ifndef _AARCH64_FENV_H_
   9 #define _AARCH64_FENV_H_
  10
  11 /* AArch64 split FPSCR into two registers FPCR and FPSR */
  12 typedef struct {
  13     unsigned int __fpcr;
  14     unsigned int __fpsr;
  15 } fenv_t;
  16 typedef int fexcept_t;
  17
  18 #define FE_INVALID      0x01    /* invalid operation exception */
  19 #define FE_DIVBYZERO    0x02    /* divide-by-zero exception */
  20 #define FE_OVERFLOW     0x04    /* overflow exception */
  21 #define FE_UNDERFLOW    0x08    /* underflow exception */
  22 #define FE_INEXACT      0x10    /* imprecise (loss of precision; "inexact") */
  23
  24 #define FE_ALL_EXCEPT   0x1f
  25
  26 #define FE_TONEAREST    0   /* round to nearest representable number */
  27 #define FE_UPWARD       1   /* round toward positive infinity */
  28 #define FE_DOWNWARD     2   /* round toward negative infinity */
  29 #define FE_TOWARDZERO   3   /* round to zero (truncate) */
  30
  31 __BEGIN_DECLS
  32
  33 /* Default floating-point environment */
  34 extern const fenv_t __fe_dfl_env;
  35 #define FE_DFL_ENV  (&__fe_dfl_env)
  36
  37 __END_DECLS
  38
  39 #endif /* _AARCH64_FENV_H_ */