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Diffstat (limited to 'manual/math.texi')
| -rw-r--r-- | manual/math.texi | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/manual/math.texi b/manual/math.texi index 18b7173bf0..e4f9122609 100644 --- a/manual/math.texi +++ b/manual/math.texi @@ -740,6 +740,36 @@ near zero---a case where @code{exp (@var{x}) - 1} would be inaccurate owing to subtraction of two numbers that are nearly equal. @end deftypefun +@deftypefun double exp2m1 (double @var{x}) +@deftypefunx float exp2m1f (float @var{x}) +@deftypefunx {long double} exp2m1l (long double @var{x}) +@deftypefunx _FloatN exp2m1fN (_Float@var{N} @var{x}) +@deftypefunx _FloatNx exp2m1fNx (_Float@var{N}x @var{x}) +@standards{TS 18661-4:2015, math.h} +@safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}} +These functions return a value equivalent to @code{exp2 (@var{x}) - 1}. +They are computed in a way that is accurate even if @var{x} is +near zero---a case where @code{exp2 (@var{x}) - 1} would be inaccurate owing +to subtraction of two numbers that are nearly equal. + +The @code{exp2m1} functions are from TS 18661-4:2015. +@end deftypefun + +@deftypefun double exp10m1 (double @var{x}) +@deftypefunx float exp10m1f (float @var{x}) +@deftypefunx {long double} exp10m1l (long double @var{x}) +@deftypefunx _FloatN exp10m1fN (_Float@var{N} @var{x}) +@deftypefunx _FloatNx exp10m1fNx (_Float@var{N}x @var{x}) +@standards{TS 18661-4:2015, math.h} +@safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}} +These functions return a value equivalent to @code{exp10 (@var{x}) - 1}. +They are computed in a way that is accurate even if @var{x} is +near zero---a case where @code{exp10 (@var{x}) - 1} would be inaccurate owing +to subtraction of two numbers that are nearly equal. + +The @code{exp10m1} functions are from TS 18661-4:2015. +@end deftypefun + @deftypefun double log1p (double @var{x}) @deftypefunx float log1pf (float @var{x}) @deftypefunx {long double} log1pl (long double @var{x}) |