* gas/config/tc-arm.c (check_obsolete): New function.

(do_rd_rm_rn): Check swp{b} for obsoletion.
	* gas/testsuite/gas/arm/armv8-a-bad.d: New testcase.
	* gas/testsuite/gas/arm/armv8-a-bad.l: Likewise.
	* gas/testsuite/gas/arm/armv8-a-bad.s: Likewise.
	* gas/testsuite/gas/arm/depr-swp.l: Update for change in expected output.
	* gas/testsuite/gas/arm/depr-swp.s: Add additional test.
	* include/opcode/arm.h (ARM_CPU_IS_ANY): New define.

gas/ChangeLog

@@ -1,3 +1,8 @@
+2012-08-24  Matthew Gretton-Dann  <matthew.gretton-dann@arm.com>
+
+	* config/tc-arm.c (check_obsolete): New function.
+	(do_rd_rm_rn): Check swp{b} for obsoletion.
+
 2012-08-24  Matthew Gretton-Dann  <matthew.gretton-dann@arm.com>
 
 	* config/tc-arm.h (arm_ext_v8): New variable.

gas/config/tc-arm.c

@@ -7373,6 +7373,23 @@ do_rn_rd (void)
   inst.instruction |= inst.operands[1].reg << 12;
 }
 
+static bfd_boolean
+check_obsolete (const arm_feature_set *feature, const char *msg)
+{
+  if (ARM_CPU_IS_ANY (cpu_variant))
+    {
+      as_warn ("%s", msg);
+      return TRUE;
+    }
+  else if (ARM_CPU_HAS_FEATURE (cpu_variant, *feature))
+    {
+      as_bad ("%s", msg);
+      return TRUE;
+    }
+
+  return FALSE;
+}
+
 static void
 do_rd_rm_rn (void)
 {
@@ -7383,12 +7400,15 @@ do_rd_rm_rn (void)
       constraint (Rn == inst.operands[0].reg || Rn == inst.operands[1].reg,
 		  _("Rn must not overlap other operands"));
 
-      /* SWP{b} is deprecated for ARMv6* and ARMv7.  */
+      /* SWP{b} is obsolete for ARMv8-A, and deprecated for ARMv6* and ARMv7.
-      if (warn_on_deprecated
+       */
-	  && ARM_CPU_HAS_FEATURE (selected_cpu, arm_ext_v6))
+      if (!check_obsolete (&arm_ext_v8,
-	as_warn (_("swp{b} use is deprecated for this architecture"));
+			   _("swp{b} use is obsoleted for ARMv8 and later"))
-
+	  && warn_on_deprecated
+	  && ARM_CPU_HAS_FEATURE (cpu_variant, arm_ext_v6))
+	as_warn (_("swp{b} use is deprecated for ARMv6 and ARMv7"));
     }
+
   inst.instruction |= inst.operands[0].reg << 12;
   inst.instruction |= inst.operands[1].reg;
   inst.instruction |= Rn << 16;

gas/testsuite/ChangeLog

@@ -1,3 +1,11 @@
+2012-08-24  Matthew Gretton-Dann  <matthew.gretton-dann@arm.com>
+
+	* gas/arm/armv8-a-bad.d: New testcase.
+	* gas/arm/armv8-a-bad.l: Likewise.
+	* gas/arm/armv8-a-bad.s: Likewise.
+	* gas/arm/depr-swp.l: Update for change in expected output.
+	* gas/arm/depr-swp.s: Add additional test.
+
 2012-08-24  Matthew Gretton-Dann  <matthew.gretton-dann@arm.com>
 
 	* gas/arm/attr-march-all.d: Update for change in expected

gas/testsuite/gas/arm/armv8-a-bad.d

@@ -0,0 +1,2 @@
+#name: Invalid v8-a
+#error-output: armv8-a-bad.l

gas/testsuite/gas/arm/armv8-a-bad.l

@@ -0,0 +1,2 @@
+.*: Assembler messages:
+.*:7: Error: swp{b} use is obsoleted for ARMv8 and later

gas/testsuite/gas/arm/armv8-a-bad.s

@@ -0,0 +1,7 @@
+	.syntax unified
+	.text
+	.arch armv8-a
+
+	// SWP
+	.arm
+	swp r0, r1, [r2]

gas/testsuite/gas/arm/depr-swp.l

@@ -1,3 +1,4 @@
 [^:]*: Assembler messages:
-[^:]*:5: Warning: swp{b} use is deprecated for this architecture
+[^:]*:2: Warning: swp{b} use is obsoleted for ARMv8 and later
-[^:]*:7: Warning: swp{b} use is deprecated for this architecture
+[^:]*:6: Warning: swp{b} use is deprecated for ARMv6 and ARMv7
+[^:]*:8: Warning: swp{b} use is deprecated for ARMv6 and ARMv7

gas/testsuite/gas/arm/depr-swp.s

@@ -1,4 +1,5 @@
 .syntax unified
+swp r0, r1, [r2]
 .arch armv4
 swp r0, r1, [r2]
 .arch armv6

include/ChangeLog

@@ -1,3 +1,7 @@
+2012-08-24  Matthew Gretton-Dann  <matthew.gretton-dann@arm.com>
+
+	* opcode/arm.h (ARM_CPU_IS_ANY): New define.
+
 2012-08-24  Matthew Gretton-Dann  <matthew.gretton-dann@arm.com>
 
 	* elf/arm.h (TAG_CPU_ARCH_V8): New define.

include/opcode/arm.h

@@ -269,6 +269,9 @@ typedef struct
 #define ARM_CPU_HAS_FEATURE(CPU,FEAT) \
   (((CPU).core & (FEAT).core) != 0 || ((CPU).coproc & (FEAT).coproc) != 0)
 
+#define ARM_CPU_IS_ANY(CPU) \
+  ((CPU).core == ((arm_feature_set)ARM_ANY).core)
+
 #define ARM_MERGE_FEATURE_SETS(TARG,F1,F2)	\
   do {						\
     (TARG).core = (F1).core | (F2).core;	\