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- Log -----------------------------------------------------------------
commit 32b8d79b35c43ac4f1f09662988ca297b19ec947
Author: Marius Hillenbrand <mhillen@linux.ibm.com>
Date:   Mon Nov 30 10:56:31 2020 -0700

    gcc-11/changes: Document new configure flag --enable-s390-excess-float-precision

diff --git a/htdocs/gcc-11/changes.html b/htdocs/gcc-11/changes.html
index 46a6a372..20f29677 100644
--- a/htdocs/gcc-11/changes.html
+++ b/htdocs/gcc-11/changes.html
@@ -340,7 +340,20 @@ a work-in-progress.</p>
 
 <!-- <h3 id="powerpc">PowerPC / PowerPC64 / RS6000</h3> -->
 
-<!-- <h3 id="s390">S/390, System z, IBM z Systems</h3> -->
+<h3 id="s390">S/390, System z, IBM Z Systems</h3>
+<ul>
+  <li>The behavior when compiling with <code>-fexcess-precision=standard</code>
+      (e.g., implied by <code>-std=c99</code>) on s390(x) targets can now be
+      controlled at configure time with the flag
+      <code>--enable-s390-excess-float-precision</code>. When enabled, gcc will
+      maintain previous behavior and evaluate float expressions in double
+      precision, which aligns with the definition of <code>float_t</code> as
+      <code>double</code>. With the flag disabled, gcc will always evaluate
+      float expressions in single precision. In native builds, gcc will by
+      default match the definition of <code>float_t</code> in the installed
+      glibc.
+  </li>
+</ul>
 
 <!-- <h3 id="riscv">RISC-V</h3> -->
 

-----------------------------------------------------------------------

Summary of changes:
 htdocs/gcc-11/changes.html | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)


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