include/fenv.h

   1 #ifndef _FENV_H
   2 #include <math/fenv.h>
   3
   4 #ifndef _ISOMAC
   5 # include <stdbool.h>
   6 /* Now define the internal interfaces.  */
   7
   8 extern int __feclearexcept (int __excepts);
   9 extern int __fegetexcept (void);
  10 extern int __fegetexceptflag (fexcept_t *__flagp, int __excepts);
  11 extern int __feraiseexcept (int __excepts);
  12 extern int __fesetexceptflag (const fexcept_t *__flagp, int __excepts);
  13 extern int __fegetenv (fenv_t *__envp);
  14 extern int __fesetenv (const fenv_t *__envp);
  15 extern int __feupdateenv (const fenv_t *__envp);
  16 extern __typeof (fegetround) __fegetround __attribute_pure__;
  17 extern __typeof (feholdexcept) __feholdexcept;
  18 extern __typeof (fesetround) __fesetround;
  19
  20 libm_hidden_proto (feraiseexcept)
  21 libm_hidden_proto (__feraiseexcept)
  22 libm_hidden_proto (fegetenv)
  23 libm_hidden_proto (__fegetenv)
  24 libm_hidden_proto (fegetround)
  25 libm_hidden_proto (__fegetround)
  26 libm_hidden_proto (fesetenv)
  27 libm_hidden_proto (__fesetenv)
  28 libm_hidden_proto (fesetround)
  29 libm_hidden_proto (__fesetround)
  30 libm_hidden_proto (feholdexcept)
  31 libm_hidden_proto (__feholdexcept)
  32 libm_hidden_proto (feupdateenv)
  33 libm_hidden_proto (__feupdateenv)
  34 libm_hidden_proto (fetestexcept)
  35 libm_hidden_proto (feclearexcept)
  36
  37 /* Rounding mode context.  This allows functions to set/restore rounding mode
  38    only when the desired rounding mode is different from the current rounding
  39    mode.  */
  40 struct rm_ctx
  41 {
  42   fenv_t env;
  43   bool updated_status;
  44 };
  45
  46 /* Track whether rounding mode macros were defined, since
  47    get-rounding-mode.h may define default versions if they weren't.
  48    FE_TONEAREST must always be defined (even if no changes of rounding
  49    mode are supported, glibc requires it to be defined to represent
  50    the default rounding mode).  */
  51 # ifndef FE_TONEAREST
  52 #  error "FE_TONEAREST not defined"
  53 # endif
  54 # if defined FE_DOWNWARD || defined FE_TOWARDZERO || defined FE_UPWARD
  55 #  define FE_HAVE_ROUNDING_MODES 1
  56 # else
  57 #  define FE_HAVE_ROUNDING_MODES 0
  58 # endif
  59
  60 #endif
  61
  62 #endif