Document -fexcess-precision=16.

gcc/ChangeLog:

	PR middle-end/114347
	* doc/invoke.texi: Document -fexcess-precision=16.

diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index b446b2905c72571e8c4b1a01888b45865e6a4524..e0950ca5dc2add6716d530bafe7ffd8aab12db4d 100644 (file)
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -14931,6 +14931,9 @@ assignments).  This option is enabled by default for C or C++ if a strict
 conformance option such as @option{-std=c99} or @option{-std=c++17} is used.
 @option{-ffast-math} enables @option{-fexcess-precision=fast} by default
 regardless of whether a strict conformance option is used.
+If @option{-fexcess-precision=16} is specified, constants and the
+results of expressions with types @code{_Float16} and @code{__bf16}
+are computed without excess precision.
 
 @opindex mfpmath
 @option{-fexcess-precision=standard} is not implemented for languages