Document -fexcess-precision=16 in tm.texi

I just happened to stuble on this one while trying to sort out the
RISC-V bits.

gcc/ChangeLog

	* doc/tm.texi (TARGET_C_EXCESS_PRECISION): Add 16.

diff --git a/gcc/doc/tm.texi b/gcc/doc/tm.texi
index 858bfb80cec6ebae0081dfd2162ae86c8f826a7a..7590924f2ca1870a0d48d9b1b2e22c190141cd99 100644 (file)
--- a/gcc/doc/tm.texi
+++ b/gcc/doc/tm.texi
@@ -1009,7 +1009,7 @@ of the excess precision explicitly added.  For
 @code{EXCESS_PRECISION_TYPE_FLOAT16}, and
 @code{EXCESS_PRECISION_TYPE_FAST}, the target should return the
 explicit excess precision that should be added depending on the
-value set for @option{-fexcess-precision=@r{[}standard@r{|}fast@r{]}}.
+value set for @option{-fexcess-precision=@r{[}standard@r{|}fast@r{|}16@r{]}}.
 Note that unpredictable explicit excess precision does not make sense,
 so a target should never return @code{FLT_EVAL_METHOD_UNPREDICTABLE}
 when @var{type} is @code{EXCESS_PRECISION_TYPE_STANDARD},