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Diffstat (limited to 'manual/arith.texi')
| -rw-r--r-- | manual/arith.texi | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/manual/arith.texi b/manual/arith.texi index 3a04bc2..23b9373 100644 --- a/manual/arith.texi +++ b/manual/arith.texi @@ -1127,6 +1127,39 @@ non-zero value otherwise. @end deftypefun @noindent +TS 18661-1:2014 defines additional functions to save and restore +floating-point control modes (such as the rounding mode and whether +traps are enabled) while leaving other status (such as raised flags) +unchanged. + +@vindex FE_DFL_MODE +The special macro @code{FE_DFL_MODE} may be passed to +@code{fesetmode}. It represents the floating-point control modes at +program start. + +@comment fenv.h +@comment ISO +@deftypefun int fegetmode (femode_t *@var{modep}) +@safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}} +Store the floating-point control modes in the variable pointed to by +@var{modep}. + +The function returns zero in case the operation was successful, a +non-zero value otherwise. +@end deftypefun + +@comment fenv.h +@comment ISO +@deftypefun int fesetmode (const femode_t *@var{modep}) +@safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}} +Set the floating-point control modes to those described by +@var{modep}. + +The function returns zero in case the operation was successful, a +non-zero value otherwise. +@end deftypefun + +@noindent To control for individual exceptions if raising them causes a trap to occur, you can use the following two functions. |