From: schwab <schwab@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Thu, 17 Jul 2014 08:40:15 +0000 (+0000)
Subject: Summary: Generate canonical infinity for the Motorola extended real format
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=a2bdefc8fb5ad56bfcfd98a60698e7a6f1945b73;p=thirdparty%2Fgcc.git

Summary: Generate canonical infinity for the Motorola extended real format

* real.c (encode_ieee_extended_motorola): Clear integer bit in the
infinity format.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@212744 138bc75d-0d04-0410-961f-82ee72b054a4
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index ee335f2176e4..c1b2a2858864 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2014-07-17  Andreas Schwab  <schwab@linux-m68k.org>
+
+	* real.c (encode_ieee_extended_motorola): Clear integer bit in the
+	infinity format.
+
 2014-07-17  Richard Biener  <rguenther@suse.de>
 
 	PR rtl-optimization/61801
diff --git a/gcc/real.c b/gcc/real.c
index 231fc96c932a..1c2f709c9d01 100644
--- a/gcc/real.c
+++ b/gcc/real.c
@@ -3481,6 +3481,11 @@ encode_ieee_extended_motorola (const struct real_format *fmt, long *buf,
   long intermed[3];
   encode_ieee_extended (fmt, intermed, r);
 
+  if (r->cl == rvc_inf)
+    /* For infinity clear the explicit integer bit again, so that the
+       format matches the canonical infinity generated by the FPU.  */
+    intermed[1] = 0;
+
   /* Motorola chips are assumed always to be big-endian.  Also, the
      padding in a Motorola extended real goes between the exponent and
      the mantissa.  At this point the mantissa is entirely within