From: Richard Henderson <rth@gcc.gnu.org>
Date: Wed, 26 Feb 2003 21:07:40 +0000 (-0800)
Subject: Update commentary.
X-Git-Tag: releases/gcc-3.4.0~8389
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=eeec05e1dbd553dc97695ac6bb91112c42599d30;p=thirdparty%2Fgcc.git

Update commentary.

From-SVN: r63484
---

diff --git a/gcc/real.c b/gcc/real.c
index d04afabfe1dd..1e70bf7d4d95 100644
--- a/gcc/real.c
+++ b/gcc/real.c
@@ -1311,6 +1311,10 @@ real_to_integer (r)
     case rvc_normal:
       if (r->exp <= 0)
 	goto underflow;
+      /* Only force overflow for unsigned overflow.  Signed overflow is
+	 undefined, so it doesn't matter what we return, and some callers
+	 expect to be able to use this routine for both signed and 
+	 unsigned conversions.  */
       if (r->exp > HOST_BITS_PER_WIDE_INT)
 	goto overflow;
 
@@ -1371,6 +1375,10 @@ real_to_integer2 (plow, phigh, r)
       exp = r->exp;
       if (exp <= 0)
 	goto underflow;
+      /* Only force overflow for unsigned overflow.  Signed overflow is
+	 undefined, so it doesn't matter what we return, and some callers
+	 expect to be able to use this routine for both signed and 
+	 unsigned conversions.  */
       if (exp > 2*HOST_BITS_PER_WIDE_INT)
 	goto overflow;