Arc assembler: Convert nps400 from a machine type to an extension.

gas	* config/tc-arc.c (check_cpu_feature, md_parse_option):
	Add nps400 option and feature. Add check for nps400
	feature. Refactor existing checks to check subclass before
	feature enablement.
	(md_show_usage): Document flags for NPS-400 and add some other
	undocumented flags.
	(cpu_type): Remove nps400 CPU type entry
	(check_zol): Remove bfd_mach_arc_nps400 case.
	(md_show_usage): Add help on -mcpu=nps400.
	(cpu_types): Add entry for nps400 as arc700 plus nps400 extension
	set.
	* doc/c-arc.texi: Document the -mnps400, -mspfp, -mdpfp, and
	-fpuda flags.  Document -mcpu=nps400.
	* testsuite/gas/arc/nps-400-0.d: Use -mcpu=arc700 -mnps400. Change
	expected flags to match ARC700 instead of NPS400.
	* testsuite/gas/arc/nps-400-1.d: Use -mcpu=arc700 -mnps400.
	* testsuite/gas/arc/nps-400-2.d: Likewise.
	* testsuite/gas/arc/nps-400-3.d: Likewise.
	* testsuite/gas/arc/nps-400-4.d: Likewise.
	* testsuite/gas/arc/nps-400-5.d: Likewise.
	* testsuite/gas/arc/nps-400-6.d: Likewise.
	* testsuite/gas/arc/nps-400-7.d: Likewise.
	* testsuite/gas/arc/textinsn2op01.s: Change opcode of myinsn to
	avoid clash with cbba instruction.
	* testsuite/gas/arc/textinsn2op01.d: Likewise.
	* testsuite/gas/arc/textinsn3op.d: Likewise.
	* testsuite/gas/arc/textinsn3op.s: Likewise.
	* testsuite/gas/arc/nps-400-0.d: Test using NPS-400 using
	-mcpu=nps400 as an alternative to -mcpu=arc700 -mnps400 flags.

binutils* readelf.c (decode_ARC_machine_flags): Remove E_ARC_MACH_NPS400
	case.

ld	* testsuite/ld-arc/nps-1a.d: Use -mcpu=arc700 -mnps400.
	* testsuite/ld-arc/nps-1b.d: Likewise.

include	* opcode/arc.h: Add nps400 extension and instruction
	subclass.
	Remove ARC_OPCODE_NPS400
	* elf/arc.h: Remove E_ARC_MACH_NPS400

opcodes	* arc-dis.c (arc_insn_length): Add comment on instruction length.
	Use same method for determining	instruction length on ARC700 and
	NPS-400.
	(arc_insn_length, print_insn_arc): Remove bfd_mach_arc_nps400.
	* arc-nps400-tbl.h: Make all nps400 instructions ARC700 instructions
	with the NPS400 subclass.
	* arc-opc.c: Likewise.

bfd	* archures.c: Remove bfd_mach_arc_nps400.
	* bfd-in2.h: Likewise.
	* cpu-arc.c (arch_info_struct): Likewise.
	* elf32-arc.c (arc_elf_object_p, arc_elf_final_write_processing):
	Likewise.

1 files changed, 6 insertions, 6 deletions

diff --git a/opcodes/arc-dis.c b/opcodes/arc-dis.c
index 26dbd73864..1d1dcd81c1 100644
--- a/opcodes/arc-dis.c
+++ b/opcodes/arc-dis.c
@@ -557,7 +557,12 @@ arc_insn_length (bfd_byte msb, bfd_byte lsb, struct disassemble_info *info)
 
   switch (info->mach)
     {
-    case bfd_mach_arc_nps400:
+    case bfd_mach_arc_arc700:
+      /* The nps400 extension set requires this special casing of the
+	 instruction length calculation.  Right now this is not causing any
+	 problems as none of the known extensions overlap in opcode space,
+	 but, if they ever do then we might need to start carrying
+	 information around in the elf about which extensions are in use.  */
       if (major_opcode == 0xb)
         {
           bfd_byte minor_opcode = lsb & 0x1f;
@@ -565,7 +570,6 @@ arc_insn_length (bfd_byte msb, bfd_byte lsb, struct disassemble_info *info)
           if (minor_opcode < 4)
             return 2;
         }
-    case bfd_mach_arc_arc700:
     case bfd_mach_arc_arc600:
       return (major_opcode > 0xb) ? 2 : 4;
       break;
@@ -719,10 +723,6 @@ print_insn_arc (bfd_vma memaddr,
 
   switch (info->mach)
     {
-    case bfd_mach_arc_nps400:
-      isa_mask = ARC_OPCODE_ARC700 | ARC_OPCODE_NPS400;
-      break;
-
     case bfd_mach_arc_arc700:
       isa_mask = ARC_OPCODE_ARC700;
       break;