From: liuhongt <hongtao.liu@intel.com>
Date: Mon, 18 Mar 2024 10:53:59 +0000 (+0800)
Subject: Document -fexcess-precision=16.
X-Git-Tag: basepoints/gcc-15~551
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=415091f09096a0ebba1fdcd4af8c2fda24cfd411;p=thirdparty%2Fgcc.git

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 b446b2905c72..e0950ca5dc2a 100644
--- 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