From bc58512a28e111131eb5880fcbb7bc00e73cd900 Mon Sep 17 00:00:00 2001
From: Gunther Nikl <gnikl@baltic.net>
Date: Mon, 17 Nov 2014 19:42:40 +0000
Subject: [PATCH] The upper bits of some instruction data should be zero.

* gas/config/tc-m68k.c (m68k_ip): Sanitize opcode data.
---
 gas/config/tc-m68k.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/gas/config/tc-m68k.c b/gas/config/tc-m68k.c
index 3b4c3da..c35a024 100644
--- a/gas/config/tc-m68k.c
+++ b/gas/config/tc-m68k.c
@@ -2001,7 +2001,7 @@ m68k_ip (instring)
 		case 'b':
 		  if (!isbyte (nextword))
 		    opP->error = _("operand out of range");
-		  addword (nextword);
+		  addword (nextword & 0xff); /* G.Nikl: clear upper byte */
 		  baseo = 0;
 		  break;
 		case 'w':
@@ -2546,7 +2546,7 @@ m68k_ip (instring)
 				   user beware! */
 	      if (!isbyte (tmpreg))
 		opP->error = _("out of range");
-	      insop (tmpreg, opcode);
+	      insop (tmpreg & 0xff, opcode); /* G.Nikl: clear upper byte */
 	      if (isvar (&opP->disp))
 		the_ins.reloc[the_ins.nrel - 1].n =
 		  (opcode->m_codenum) * 2 + 1;