From a87ff8bd02a7aee3e6c87fc7b4fb1e53cc61bb4d Mon Sep 17 00:00:00 2001
From: "Paul A. Clarke" <pc@us.ibm.com>
Date: Mon, 11 May 2020 12:06:25 -0500
Subject: [PATCH] Add example initializer for vector __int128

Since there isn't a straightforward way of initializing `__int128` type
variables, provide an example for initializing `vector __int128` here.

Fixes #10.

Signed-off-by: Paul A. Clarke <pc@us.ibm.com>
---
 Intrinsics_Reference/ch_biendian.xml | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/Intrinsics_Reference/ch_biendian.xml b/Intrinsics_Reference/ch_biendian.xml
index b18f13f..ac088a9 100644
--- a/Intrinsics_Reference/ch_biendian.xml
+++ b/Intrinsics_Reference/ch_biendian.xml
@@ -122,11 +122,12 @@ xmlns:xlink="http://www.w3.org/1999/xlink" xml:id="VIPR.biendian">
 vector double g = (vector double) { 3.5, -24.6 };</programlisting>
     <para>
       Current C compilers do not support literals for
-      <code>__int128</code> types.  When constructing a <code>vector
-      __int128</code> constant from smaller literals such as
-      <code>int</code> or <code>long long</code>, you must test for
-      endianness and reverse the order of the smaller literals for
-      little-endian mode.
+      <code>__int128</code> types.  A <code>vector __int128</code>
+      constant can be constructed from smaller literals
+      with appropriate cast-shift-or logic. For example,
+      <programlisting>
+vector unsigned __int128 x = { (((unsigned __int128)0x1020304050607080) &lt;&lt; 64) | 0x90A0B0C0D0E0F000 };
+      </programlisting>
     </para>
   </section>