sys/arch/arm/include/fenv.h

   1 /*      $NetBSD: fenv.h,v 1.3 2015/03/17 12:20:02 joerg Exp $   */
   2
   3 /*
   4  * Based on ieeefp.h written by J.T. Conklin, Apr 28, 1995
   5  * Public domain.
   6  */
   7
   8 #ifndef _ARM_FENV_H_
   9 #define _ARM_FENV_H_
  10
  11 #include <sys/cdefs.h>
  12
  13 #ifdef __ARM_PCS_AAPCS64
  14 /* AArch64 split FPSCR into two registers FPCR and FPSR */
  15 typedef struct {
  16         unsigned int __fpcr;
  17         unsigned int __fpsr;
  18 } fenv_t;
  19 #else
  20 typedef int fenv_t;             /* FPSCR */
  21 #endif
  22 typedef int fexcept_t;
  23
  24 #define FE_INVALID      0x01    /* invalid operation exception */
  25 #define FE_DIVBYZERO    0x02    /* divide-by-zero exception */
  26 #define FE_OVERFLOW     0x04    /* overflow exception */
  27 #define FE_UNDERFLOW    0x08    /* underflow exception */
  28 #define FE_INEXACT      0x10    /* imprecise (loss of precision; "inexact") */
  29
  30 #define FE_ALL_EXCEPT   0x1f
  31
  32 #define FE_TONEAREST    0       /* round to nearest representable number */
  33 #define FE_UPWARD       1       /* round toward positive infinity */
  34 #define FE_DOWNWARD     2       /* round toward negative infinity */
  35 #define FE_TOWARDZERO   3       /* round to zero (truncate) */
  36
  37 __BEGIN_DECLS
  38
  39 /* Default floating-point environment */
  40 extern const fenv_t     __fe_dfl_env;
  41 #define FE_DFL_ENV      (&__fe_dfl_env)
  42
  43 __END_DECLS
  44
  45 #endif /* _ARM_FENV_H_ */