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Diffstat (limited to 'manual/arith.texi')
| -rw-r--r-- | manual/arith.texi | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/manual/arith.texi b/manual/arith.texi index 72682f0c99..f54b1ec7df 100644 --- a/manual/arith.texi +++ b/manual/arith.texi @@ -1702,6 +1702,46 @@ These functions are identical to the corresponding versions of double}. @end deftypefun +@comment math.h +@comment GNU +@deftypefun double nextup (double @var{x}) +@comment math.h +@comment GNU +@deftypefunx float nextupf (float @var{x}) +@comment math.h +@comment GNU +@deftypefunx {long double} nextupl (long double @var{x}) +@safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}} +The @code{nextup} function returns the next representable neighbor of @var{x} +in the direction of positive infinity. If @var{x} is the smallest negative +subnormal number in the type of @var{x} the function returns @code{-0}. If +@math{@var{x} = @code{0}} the function returns the smallest positive subnormal +number in the type of @var{x}. If @var{x} is NaN, NaN is returned. +If @var{x} is @math{+@infinity{}}, @math{+@infinity{}} is returned. +@code{nextup} is based on TS 18661 and currently enabled as a GNU extension. +@code{nextup} never raises an exception except for signaling NaNs. +@end deftypefun + +@comment math.h +@comment GNU +@deftypefun double nextdown (double @var{x}) +@comment math.h +@comment GNU +@deftypefunx float nextdownf (float @var{x}) +@comment math.h +@comment GNU +@deftypefunx {long double} nextdownl (long double @var{x}) +@safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}} +The @code{nextdown} function returns the next representable neighbor of @var{x} +in the direction of negative infinity. If @var{x} is the smallest positive +subnormal number in the type of @var{x} the function returns @code{+0}. If +@math{@var{x} = @code{0}} the function returns the smallest negative subnormal +number in the type of @var{x}. If @var{x} is NaN, NaN is returned. +If @var{x} is @math{-@infinity{}}, @math{-@infinity{}} is returned. +@code{nextdown} is based on TS 18661 and currently enabled as a GNU extension. +@code{nextdown} never raises an exception except for signaling NaNs. +@end deftypefun + @cindex NaN @comment math.h @comment ISO |