Add support for 48 and 64 bit ARC instructions.

gas	* config/tc-arc.c (parse_opcode_flags): New function.
	(find_opcode_match): Move flag parsing code out to new function.
	Ignore operands marked IGNORE.
	(build_fake_opcode_hash_entry): New function.
	(find_special_case_long_opcode): New function.
	(find_special_case): Lookup long opcodes.
	* testsuite/gas/arc/nps400-7.d: New file.
	* testsuite/gas/arc/nps400-7.s: New file.

include	* opcode/arc.h (MAX_INSN_ARGS): Increase to 16.
	(struct arc_long_opcode): New structure.
	(arc_long_opcodes): Declare.
	(arc_num_long_opcodes): Declare.

opcodes	* arc-dis.c (struct arc_operand_iterator): New structure.
	(find_format_from_table): All the old content from find_format,
	with some minor adjustments, and parameter renaming.
	(find_format_long_instructions): New function.
	(find_format): Rewritten.
	(arc_insn_length): Add LSB parameter.
	(extract_operand_value): New function.
	(operand_iterator_next): New function.
	(print_insn_arc): Use new functions to find opcode, and iterator
	over operands.
	* arc-opc.c (insert_nps_3bit_dst_short): New function.
	(extract_nps_3bit_dst_short): New function.
	(insert_nps_3bit_src2_short): New function.
	(extract_nps_3bit_src2_short): New function.
	(insert_nps_bitop1_size): New function.
	(extract_nps_bitop1_size): New function.
	(insert_nps_bitop2_size): New function.
	(extract_nps_bitop2_size): New function.
	(insert_nps_bitop_mod4_msb): New function.
	(extract_nps_bitop_mod4_msb): New function.
	(insert_nps_bitop_mod4_lsb): New function.
	(extract_nps_bitop_mod4_lsb): New function.
	(insert_nps_bitop_dst_pos3_pos4): New function.
	(extract_nps_bitop_dst_pos3_pos4): New function.
	(insert_nps_bitop_ins_ext): New function.
	(extract_nps_bitop_ins_ext): New function.
	(arc_operands): Add new operands.
	(arc_long_opcodes): New global array.
	(arc_num_long_opcodes): New global.
	* arc-nps400-tbl.h: Add comments referencing arc_long_opcodes.

2 files changed, 32 insertions, 1 deletions

diff --git a/include/ChangeLog b/include/ChangeLog
index 829ecc0..607eba0 100644
--- a/include/ChangeLog
+++ b/include/ChangeLog
@@ -1,3 +1,10 @@
+2016-06-02  Andrew Burgess  <andrew.burgess@embecosm.com>
+
+	* opcode/arc.h (MAX_INSN_ARGS): Increase to 16.
+	(struct arc_long_opcode): New structure.
+	(arc_long_opcodes): Declare.
+	(arc_num_long_opcodes): Declare.
+
 2016-06-01  Trevor Saunders  <tbsaunde+binutils@tbsaunde.org>
 
 	* elf/mips.h: Add extern "C".
diff --git a/include/opcode/arc.h b/include/opcode/arc.h
index 444341a..b71c2f5 100644
--- a/include/opcode/arc.h
+++ b/include/opcode/arc.h
@@ -25,7 +25,7 @@
 #define OPCODE_ARC_H
 
 #ifndef MAX_INSN_ARGS
-#define MAX_INSN_ARGS	     8
+#define MAX_INSN_ARGS	     16
 #endif
 
 #ifndef MAX_INSN_FLGS
@@ -136,6 +136,30 @@ struct arc_opcode
   unsigned char flags[MAX_INSN_FLGS + 1];
 };
 
+/* Structure used to describe 48 and 64 bit instructions.  */
+struct arc_long_opcode
+{
+  /* The base instruction is either 16 or 32 bits, and is described like a
+     normal instruction.  */
+  struct arc_opcode base_opcode;
+
+  /* The template value for the 32-bit LIMM extension.  Used by the
+     assembler and disassembler in the same way as the 'opcode' field of
+     'struct arc_opcode'.  */
+  unsigned limm_template;
+
+  /* The mask value for the 32-bit LIMM extension.  Used by the
+     disassembler just like the 'mask' field in 'struct arc_opcode'.  */
+  unsigned limm_mask;
+
+  /* Array of operand codes similar to the 'operands' array in 'struct
+     arc_opcode'.  These operands are used to fill in the LIMM value.  */
+  unsigned char operands[MAX_INSN_ARGS + 1];
+};
+
+extern const struct arc_long_opcode arc_long_opcodes[];
+extern const unsigned arc_num_long_opcodes;
+
 /* The table itself is sorted by major opcode number, and is otherwise
    in the order in which the disassembler should consider
    instructions.  */