arc/nps400: Validate address type operands correctly

When we match against an address type operand within an instruction it
is important that we match exactly the right address type operand early
on, during the opcode selection phase.  If we wait until the operand
insertion phase to check that we have the correct address operand, then
it is too late to select an alternative opcode.  This becomes important
only when we have multiple opcodes with the same mnemonic, and operand
lists that differ only in the type of the address operands.

This commit fixes this issue, and adds some example instructions that
require this issue to be fixed (the instructions are identical except
for the address type operand).

gas/ChangeLog:

	* config/tc-arc.c (find_opcode_match): Use insert function to
	validate matching address type operands.
	* testsuite/gas/arc/nps400-10.d: New file.
	* testsuite/gas/arc/nps400-10.s: New file.

opcodes/ChangeLog:

	* arc-opc.c (arc_flag_operands): Add F_DI14.
	(arc_flag_classes): Add C_DI14.
	* arc-nps400-tbl.h: Add new exc instructions.

4 files changed, 69 insertions, 3 deletions

diff --git a/gas/ChangeLog b/gas/ChangeLog
index e83132f..3938065 100644
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,3 +1,10 @@
+2016-11-04  Andrew Burgess  <andrew.burgess@embecosm.com>
+
+	* config/tc-arc.c (find_opcode_match): Use insert function to
+	validate matching address type operands.
+	* testsuite/gas/arc/nps400-10.d: New file.
+	* testsuite/gas/arc/nps400-10.s: New file.
+
 2016-11-04  Thomas Preud'homme  <thomas.preudhomme@arm.com>
 
 	* config/tc-arm.c (cortex-m33): Declare new processor.
diff --git a/gas/config/tc-arc.c b/gas/config/tc-arc.c
index c0bc3e4..06aee48 100644
--- a/gas/config/tc-arc.c
+++ b/gas/config/tc-arc.c
@@ -1720,9 +1720,22 @@ find_opcode_match (const struct arc_opcode_hash_entry *entry,
 	  switch (operand->flags & ARC_OPERAND_TYPECHECK_MASK)
 	    {
             case ARC_OPERAND_ADDRTYPE:
-              /* Check to be an address type.  */
-              if (tok[tokidx].X_op != O_addrtype)
-                goto match_failed;
+	      {
+		const char *errmsg = NULL;
+
+		/* Check to be an address type.  */
+		if (tok[tokidx].X_op != O_addrtype)
+		  goto match_failed;
+
+		/* All address type operands need to have an insert
+		   method in order to check that we have the correct
+		   address type.  */
+		gas_assert (operand->insert != NULL);
+		(*operand->insert) (0, tok[tokidx].X_add_number,
+				    &errmsg);
+		if (errmsg != NULL)
+		  goto match_failed;
+	      }
               break;
 
 	    case ARC_OPERAND_IR:
diff --git a/gas/testsuite/gas/arc/nps400-10.d b/gas/testsuite/gas/arc/nps400-10.d
new file mode 100644
index 0000000..44a6cfd
--- /dev/null
+++ b/gas/testsuite/gas/arc/nps400-10.d
@@ -0,0 +1,24 @@
+#as: -mcpu=arc700 -mnps400
+#objdump: -dr
+
+.*: +file format .*arc.*
+
+Disassembly of section \.text:
+
+[0-9a-f]+ <.*>:
+   0:	4846 0c21           	exc	r0,r0,\[xa:r2\]
+   4:	4926 0c61           	exc	r1,r1,\[sd:r1\]
+   8:	4a66 0c81           	exc	r2,r2,\[xd:r3\]
+   c:	4b26 0c01           	exc	r3,r3,\[r1\]
+  10:	4c96 4c21           	exc\.di\.f	r12,r12,\[xa:r12\]
+  14:	4eb6 4c61           	exc\.di\.f	r14,r14,\[sd:r13\]
+  18:	4dd6 4c81           	exc\.di\.f	r13,r13,\[xd:r14\]
+  1c:	4ff6 4c01           	exc\.di\.f	r15,r15,\[r15\]
+  20:	4c16 0c21           	exc\.f	r12,r12,\[xa:r0\]
+  24:	4e36 0c61           	exc\.f	r14,r14,\[sd:r1\]
+  28:	4d16 0c81           	exc\.f	r13,r13,\[xd:r0\]
+  2c:	4f56 0c01           	exc\.f	r15,r15,\[r2\]
+  30:	4c86 4c21           	exc\.di	r12,r12,\[xa:r12\]
+  34:	4ec6 4c61           	exc\.di	r14,r14,\[sd:r14\]
+  38:	4da6 4c81           	exc\.di	r13,r13,\[xd:r13\]
+  3c:	4fe6 4c01           	exc\.di	r15,r15,\[r15\]
diff --git a/gas/testsuite/gas/arc/nps400-10.s b/gas/testsuite/gas/arc/nps400-10.s
new file mode 100644
index 0000000..18760c8
--- /dev/null
+++ b/gas/testsuite/gas/arc/nps400-10.s
@@ -0,0 +1,22 @@
+        .text
+
+        ;; Atomic Operations: exc
+        exc  r0,r0,[xa:r2]
+        exc  r1,r1,[sd:r1]
+        exc  r2,r2,[xd:r3]
+        exc  r3,r3,[r1]
+
+        exc.di.f  r12,r12,[xa:r12]
+        exc.di.f  r14,r14,[sd:r13]
+        exc.di.f  r13,r13,[xd:r14]
+        exc.di.f  r15,r15,[r15]
+
+        exc.f  r12,r12,[xa:r0]
+        exc.f  r14,r14,[sd:r1]
+        exc.f  r13,r13,[xd:r0]
+        exc.f  r15,r15,[r2]
+
+        exc.di  r12,r12,[xa:r12]
+        exc.di  r14,r14,[sd:r14]
+        exc.di  r13,r13,[xd:r13]
+        exc.di  r15,r15,[r15]