Fix for problem with default alignment of .comm

gas/ChangeLog

@@ -1,3 +1,7 @@
+2000-06-20  Tom Rix <trix@redhat.com>
+
+	* config/tc-ppc.c (ppc_comm): Change default alignment to 4 bytes.
+
 2001-06-18  H.J. Lu <hjl@gnu.org>
 
         * doc/Makefile.am (info): Depend on $(MANS).

gas/config/tc-ppc.c

@@ -2340,7 +2340,8 @@ static boolean ppc_stab_symbol;
 
 /* The .comm and .lcomm pseudo-ops for XCOFF.  XCOFF puts common
    symbols in the .bss segment as though they were local common
-   symbols, and uses a different smclas.  */
+   symbols, and uses a different smclas.  The native Aix 4.3.3 assember
+   aligns .comm and .lcomm to 4 bytes.  */
 
 static void
 ppc_comm (lcomm)
@@ -2382,7 +2383,7 @@ ppc_comm (lcomm)
     {
       /* The third argument to .comm is the alignment.  */
       if (*input_line_pointer != ',')
-	align = 3;
+	align = 2;
       else
 	{
 	  ++input_line_pointer;
@@ -2390,7 +2391,7 @@ ppc_comm (lcomm)
 	  if (align <= 0)
 	    {
 	      as_warn (_("ignoring bad alignment"));
-	      align = 3;
+	      align = 2;
 	    }
 	}
     }
@@ -2399,11 +2400,7 @@ ppc_comm (lcomm)
       char *lcomm_name;
       char lcomm_endc;
 
-      if (size <= 1)
-	align = 0;
-      else if (size <= 2)
-	align = 1;
-      else if (size <= 4)
+      if (size <= 4)
 	align = 2;
       else
 	align = 3;

gas/testsuite/ChangeLog

@@ -1,3 +1,8 @@
+2001-06-18  Tom Rix  <trix@redhat.com>
+
+	* gas/ppc/aix.exp: New file, aix specific tests.
+	* gas/ppc/align.s: New file, .comm alignment test.
+	
 2001-06-13  Andreas Jaeger  <aj@suse.de>
 
 	* gas/vtable/vtable.exp (run_list_test): Don't run on sparc64.

gas/testsuite/gas/ppc/aix.exp

@@ -0,0 +1,63 @@
+# Copyright (C) 2001 Free Software Foundation, Inc.
+# Contributed by Red Hat
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  
+#
+
+#
+# Aix on PowerPC tests
+#
+proc do_align_test {} {
+    set testname "align.s: Alignment of symbols part 1"
+    set x0 0
+    set x1 0
+    set x2 0
+    set x3 0
+    set x4 0
+
+    set testname "align.s (part 2)"
+
+    if [gas_test_old "align.s" "" "Alignment of symbols part 1"] {
+	objdump_start_no_subdir "a.out" "-t"
+
+	while 1 {
+	    expect {
+		-re "AUX val    16 prmhsh 0 snhsh 0 typ 3 algn 2 clss 5 stb 0 snstb 0" { set x0 1 }
+		-re "AUX val    32 prmhsh 0 snhsh 0 typ 3 algn 1 clss 5 stb 0 snstb 0" { set x1 1 }
+		-re "AUX val    64 prmhsh 0 snhsh 0 typ 3 algn 2 clss 5 stb 0 snstb 0" { set x2 1 }
+		-re "AUX val   128 prmhsh 0 snhsh 0 typ 3 algn 3 clss 5 stb 0 snstb 0" { set x3 1 }
+		-re "AUX val   256 prmhsh 0 snhsh 0 typ 3 algn 4 clss 5 stb 0 snstb 0" { set x4 1 }
+		-re "\[^\n\]*\n"				{ }
+		timeout				{ perror "timeout\n"; break }
+		eof				{ break }
+	    }
+	}
+
+	objdump_finish
+
+	if [all_ones $x0 $x1 $x2 $x3 $x4] then {
+	    pass $testname
+	} else {
+	    fail $testname
+	}
+    }
+}
+
+
+if [istarget powerpc*-*-aix4.3*] then {
+
+    # Make sure that symbols are correctly aligned 
+    do_align_test
+}

gas/testsuite/gas/ppc/align.s

@@ -0,0 +1,6 @@
+	.comm default_align_4,16
+	.comm align_1,32,1
+	.comm align_2,64,2
+	.comm align_4,128,3
+	.comm align_8,256,4
+