diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/fenv.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/include/fenv.h b/include/fenv.h index de4d46f8b7..76679e1e18 100644 --- a/include/fenv.h +++ b/include/fenv.h @@ -42,6 +42,21 @@ struct rm_ctx fenv_t env; bool updated_status; }; + +/* Track whether rounding mode macros were defined, since + get-rounding-mode.h may define default versions if they weren't. + FE_TONEAREST must always be defined (even if no changes of rounding + mode are supported, glibc requires it to be defined to represent + the default rounding mode). */ +# ifndef FE_TONEAREST +# error "FE_TONEAREST not defined" +# endif +# if defined FE_DOWNWARD || defined FE_TOWARDZERO || defined FE_UPWARD +# define FE_HAVE_ROUNDING_MODES 1 +# else +# define FE_HAVE_ROUNDING_MODES 0 +# endif + #endif #endif |