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.

2 files changed, 22 insertions, 4 deletions

diff --git a/gas/doc/as.texinfo b/gas/doc/as.texinfo
index 1cd60ed..6d2c325 100644
--- a/gas/doc/as.texinfo
+++ b/gas/doc/as.texinfo
@@ -2680,7 +2680,7 @@ do include file processing with the @code{.include} directive
 (@pxref{Include,,@code{.include}}).  You can use the @sc{gnu} C compiler driver
 to get other ``CPP'' style preprocessing by giving the input file a
 @samp{.S} suffix.  @xref{Overall Options, ,Options Controlling the Kind of
-Output, gcc.info, Using GNU CC}.
+Output, gcc.info, Using GNU CC} .
 
 Excess whitespace, comments, and character constants
 cannot be used in the portions of the input text that are not
diff --git a/gas/doc/c-arc.texi b/gas/doc/c-arc.texi
index 4852c3d..64522db 100644
--- a/gas/doc/c-arc.texi
+++ b/gas/doc/c-arc.texi
@@ -56,9 +56,6 @@ Assemble for ARC 601.  Alias: @code{-mARC601}.
 @cindex @code{mARC700} command line option, ARC
 Assemble for ARC 700.  Aliases: @code{-mA7}, @code{-mARC700}.
 
-@item nps400
-Assemble for NPS400.
-
 @item arcem
 @cindex @code{mEM} command line option, ARC
 Assemble for ARC EM.  Aliases: @code{-mEM}
@@ -67,6 +64,10 @@ Assemble for ARC EM.  Aliases: @code{-mEM}
 @cindex @code{mHS} command line option, ARC
 Assemble for ARC HS.  Aliases: @code{-mHS}, @code{-mav2hs}.
 
+@item nps400
+@cindex @code{mnps400} command line option, ARC
+Assemble for ARC 700 with NPS-400 extended instructions.
+
 @end table
 
 Note: the @code{.cpu} directive (@pxref{ARC Directives}) can
@@ -94,6 +95,23 @@ Enable support for assembly-time relaxation.  The assembler will
 replace a longer version of an instruction with a shorter one,
 whenever it is possible.
 
+@cindex @code{-mnps400} command line option, ARC
+@item -mnps400
+Enable support for NPS-400 extended instructions.
+
+@cindex @code{-mspfp} command line option, ARC
+@item -mspfp
+Enable support for single-precision floating point instructions.
+
+@cindex @code{-mdpfp} command line option, ARC
+@item -mdpfp
+Enable support for double-precision floating point instructions.
+
+@cindex @code{-mfpuda} command line option, ARC
+@item -mfpuda
+Enable support for double-precision assist floating point instructions.
+Only valid for ARC EM processors.
+
 @end table
 
 @node ARC Syntax