From: amylaar <amylaar@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Wed, 25 Apr 2001 16:14:24 +0000 (+0000)
Subject: 	* emit-rtl.c (constant_subword): Also do sign extension in
X-Git-Url: http://git.sourceforge.jp/view?a=commitdiff_plain;h=bfc60c5056db1285cc6a321508afc27fdf9bc131;p=pf3gnuchains%2Fgcc-fork.git

	* emit-rtl.c (constant_subword): Also do sign extension in
	BITS_PER_WORD == 16 case.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@41545 138bc75d-0d04-0410-961f-82ee72b054a4
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 87bac601ba2..c6c57ef95bf 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+Wed Apr 25 17:09:50 2001  J"orn Rennecke <amylaar@redhat.com>
+
+	* emit-rtl.c (constant_subword): Also do sign extension in
+	BITS_PER_WORD == 16 case.
+
 2001-04-25  Jason Merrill  <jason_merrill@redhat.com>
 
 	* loop.c (try_swap_copy_prop): Go back to checking insn.
diff --git a/gcc/emit-rtl.c b/gcc/emit-rtl.c
index 480ff15ee98..6fe21ae4d25 100644
--- a/gcc/emit-rtl.c
+++ b/gcc/emit-rtl.c
@@ -1369,7 +1369,7 @@ constant_subword (op, offset, mode)
 	  val = k[offset >> 1];
 	  if ((offset & 1) == ! WORDS_BIG_ENDIAN)
 	    val >>= 16;
-	  val &= 0xffff;
+	  val = ((val & 0xffff) ^ 0x8000) - 0x8000;
 	  return GEN_INT (val);
 	}
       else
@@ -1448,7 +1448,7 @@ constant_subword (op, offset, mode)
 	{
 	  if ((offset & 1) == ! WORDS_BIG_ENDIAN)
 	    val >>= 16;
-	  val &= 0xffff;
+	  val = ((val & 0xffff) ^ 0x8000) - 0x8000;
 	}
 
       return GEN_INT (val);