1 files changed, 12 insertions, 4 deletions
diff --git a/gas/config/tc-arm.c b/gas/config/tc-arm.c
index 21369d7..50e0da7 100644
--- a/gas/config/tc-arm.c
+++ b/gas/config/tc-arm.c
@@ -16008,12 +16008,20 @@ do_neon_ldx_stx (void)
 		  _("bad register for post-index"));
       inst.instruction |= postreg;
     }
-  else if (inst.operands[1].writeback)
+  else
     {
-      inst.instruction |= 0xd;
+      constraint (inst.operands[1].immisreg, BAD_ADDR_MODE);
+      constraint (inst.reloc.exp.X_op != O_constant
+		  || inst.reloc.exp.X_add_number != 0,
+		  BAD_ADDR_MODE);
+
+      if (inst.operands[1].writeback)
+	{
+	  inst.instruction |= 0xd;
+	}
+      else
+	inst.instruction |= 0xf;
     }
-  else
-    inst.instruction |= 0xf;
 
   if (thumb_mode)
     inst.instruction |= 0xf9000000;