[committed] Reject double floating point stores and loads that reference the right half of a floating point register

[John David Anglin]

This change makes gas behave in the same manner as the HP assembler.
It's not really safe to silently clobber the left half as was done
before.

Tested on hppa2.0w-hp-hpux11.11 and committed to trunk.

Dave
-- 
J. David Anglin                                  dave.anglin@nrc-cnrc.gc.ca
National Research Council of Canada              (613) 990-0752 (FAX: 952-6602)

2012-10-14  John David Anglin  <dave.anglin@nrc-cnrc.gc.ca>

	* config/tc-hppa.c (pa_ip): Reject double floating point stores and
	loads that reference the right half of a floating point register.

Index: config/tc-hppa.c
===================================================================
RCS file: /cvs/src/src/gas/config/tc-hppa.c,v
retrieving revision 1.153
diff -u -3 -p -r1.153 tc-hppa.c
--- config/tc-hppa.c	13 Oct 2012 22:15:19 -0000	1.153
+++ config/tc-hppa.c	14 Oct 2012 00:27:03 -0000
@@ -5482,7 +5482,10 @@ pa_ip (char *str)
 		case 't':
 		  if (!pa_parse_number (&s, 3))
 		    break;
-		  num = (pa_number & ~FP_REG_RSEL) - FP_REG_BASE;
+		  /* RSEL should not be set.  */
+		  if (pa_number & FP_REG_RSEL)
+		    break;
+		  num = pa_number - FP_REG_BASE;
 		  CHECK_FIELD (num, 31, 0, 0);
 		  INSERT_FIELD_AND_CONTINUE (opcode, num, 0);