added new function mpfr_exp2m1 for 2^x-1

git-svn-id: https://scm.gforge.inria.fr/anonscm/svn/mpfr/trunk@14384 280ebfd0-de03-0410-8827-d642c229c3f4

1 files changed, 7 insertions, 1 deletions

diff --git a/doc/mpfr.texi b/doc/mpfr.texi
index a00435dd2..a7560019a 100644
--- a/doc/mpfr.texi
+++ b/doc/mpfr.texi
@@ -2228,8 +2228,12 @@ rounded in the direction @var{rnd}.
 @end deftypefun
 
 @deftypefun int mpfr_expm1 (mpfr_t @var{rop}, mpfr_t @var{op}, mpfr_rnd_t @var{rnd})
+@deftypefunx int mpfr_exp2m1 (mpfr_t @var{rop}, mpfr_t @var{op}, mpfr_rnd_t @var{rnd})
 Set @var{rop} to @m{e^{@var{op}}-1,the exponential of @var{op} followed by a
-subtraction by one}, rounded in the direction @var{rnd}.
+subtraction by one}
+(resp.@: @m{2^{@var{op}}-1,2 power of @var{op} followed by a
+subtraction by one}),
+rounded in the direction @var{rnd}.
 @end deftypefun
 
 @anchor{mpfr_pow}
@@ -4197,6 +4201,8 @@ use @code{mpfr_custom_get_mantissa}.
 
 @item @code{mpfr_erandom} in MPFR@tie{}4.0.
 
+@item @code{mpfr_exp2m1} in MPFR@tie{}4.2.
+
 @item @code{mpfr_flags_clear}, @code{mpfr_flags_restore},
 @code{mpfr_flags_save}, @code{mpfr_flags_set} and @code{mpfr_flags_test}
 in MPFR@tie{}4.0.