Add support to the ARC disassembler for selecting instruction classes.

gas	* testsuite/gas/arc/dsp.d: New file.
	* testsuite/gas/arc/dsp.s: Likewise.
	* testsuite/gas/arc/fpu.d: Likewise.
	* testsuite/gas/arc/fpu.s: Likewise.
	* testsuite/gas/arc/ext2op.d: Add specific disassembler option.
	* testsuite/gas/arc/ext3op.d: Likewise.
	* testsuite/gas/arc/tdpfp.d: Likewise.
	* testsuite/gas/arc/tfpuda.d: Likewise.

opcodes	* arc-dis.c (skipclass): New structure.
	(decodelist): New variable.
	(is_compatible_p): New function.
	(new_element): Likewise.
	(skip_class_p): Likewise.
	(find_format_from_table): Use skip_class_p function.
	(find_format): Decode first the extension instructions.
	(print_insn_arc): Select either ARCEM or ARCHS based on elf
	e_flags.
	(parse_option): New function.
	(parse_disassembler_options): Likewise.
	(print_arc_disassembler_options): Likewise.
	(print_insn_arc): Use parse_disassembler_options function.  Proper
	select ARCv2 cpu variant.
	* disassemble.c (disassembler_usage): Add ARC disassembler
	options.

binutils* doc/binutils.texi (objdump): Add ARC disassembler options.
	* testsuite/binutils-all/arc/dsp.s: New file.
	* testsuite/binutils-all/arc/objdump.exp: Likewise.

include	* dis-asm.h: Declare print_arc_disassembler_options.

5 files changed, 100 insertions, 0 deletions

diff --git a/binutils/ChangeLog b/binutils/ChangeLog
index 6346e63..1d61f1c 100644
--- a/binutils/ChangeLog
+++ b/binutils/ChangeLog
@@ -1,3 +1,10 @@
+2016-07-20  Claudiu Zissulescu  <claziss@synopsys.com>
+
+	* doc/binutils.texi (objdump): Add ARC disassembler options.
+	* testsuite/binutils-all/arc/dsp.s: New file.
+	* testsuite/binutils-all/arc/objdump.exp: Likewise.
+	* NEWS: Mention the new feature.
+
 2016-07-20  Nick Clifton  <nickc@redhat.com>
 
 	* doc/binutils.texi (objcopy): Note that the localize symbol
diff --git a/binutils/NEWS b/binutils/NEWS
index 56adfa2..9ec9724 100644
--- a/binutils/NEWS
+++ b/binutils/NEWS
@@ -1,5 +1,8 @@
 -*- text -*-
 
+* The ARC port of objdump now accepts a -M option to specify the extra
+  instruction class(es) that should be disassembled.
+
 * The --remove-section option for objcopy and strip now accepts section
   patterns starting with an exclamation point to indicate a non-matching
   section.  A non-matching section is removed from the set of sections
diff --git a/binutils/doc/binutils.texi b/binutils/doc/binutils.texi
index 2f4ea0a..6038c72 100644
--- a/binutils/doc/binutils.texi
+++ b/binutils/doc/binutils.texi
@@ -2240,6 +2240,27 @@ some targets.  If it is necessary to specify more than one
 disassembler option then multiple @option{-M} options can be used or
 can be placed together into a comma separated list.
 
+For the ARC architecture the option can be used to specify the extra
+instruction classes that should be disassembled.  A comma separated
+list of one or more of the following values should be used:
+
+@table @code
+@item dsp
+Recognize DSP instructions.
+@item spfp
+Recognize FPX SP instructions.
+@item dpfp
+Recognize FPX DP instructions.
+@item quarkse_em
+Recognize FPU QuarkSE-EM instructions.
+@item fpuda
+Recognize double assist FPU instructions.
+@item fpus
+Recognize single precision FPU instructions.
+@item fpud
+Recognize double precision FPU instructions.
+@end table
+
 If the target is an ARM architecture then this switch can be used to
 select which register name set is used during disassembler.  Specifying
 @option{-M reg-names-std} (the default) will select the register names as
@@ -2367,6 +2388,15 @@ ROM dumps).  In these cases, the function entry mask would otherwise
 be decoded as VAX instructions, which would probably lead the rest
 of the function being wrongly disassembled.
 
+For ARC, @option{dsp} controls the printing of DSP instructions,
+@option{spfp} selects the printing of FPX single precision FP
+instructions, @option{dpfp} selects the printing of FPX double
+precision FP instructions, @option{quarkse_em} selects the printing of
+special QuarkSE-EM instructions, @option{fpuda} selects the printing
+of double precision assist instructions, @option{fpus} selects the
+printing of FPU single precision FP instructions, while @option{fpud}
+selects the printing of FPU souble precision FP instructions.
+
 @item -p
 @itemx --private-headers
 Print information that is specific to the object file format.  The exact
diff --git a/binutils/testsuite/binutils-all/arc/dsp.s b/binutils/testsuite/binutils-all/arc/dsp.s
new file mode 100644
index 0000000..8cca446
--- /dev/null
+++ b/binutils/testsuite/binutils-all/arc/dsp.s
@@ -0,0 +1,5 @@
+	.cpu EM
+	.text
+	vmac2hnfr	r0,r2,r4
+	cmacchfr	r0,r2,r4
+	cmacchnfr	r0,r2,r4
diff --git a/binutils/testsuite/binutils-all/arc/objdump.exp b/binutils/testsuite/binutils-all/arc/objdump.exp
new file mode 100644
index 0000000..58c4a05
--- /dev/null
+++ b/binutils/testsuite/binutils-all/arc/objdump.exp
@@ -0,0 +1,55 @@
+#   Copyright (C) 2016 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
+
+if {![istarget "arc*-*-*"]} then {
+  return
+}
+
+if {[which $OBJDUMP] == 0} then {
+    perror "$OBJDUMP does not exist"
+    return
+}
+
+send_user "Version [binutil_version $OBJDUMP]"
+
+###########################
+# Set up the test of dsp.s
+###########################
+
+if {![binutils_assemble $srcdir/$subdir/dsp.s tmpdir/dsp.o]} then {
+    return
+}
+
+if [is_remote host] {
+    set objfile [remote_download host tmpdir/dsp.o]
+} else {
+    set objfile tmpdir/dsp.o
+}
+
+# Make sure that a warning message is generated (because the disassembly does
+# not match the assembled instructions, which has happened because the user
+# has not specified a -M option on the disassembler command line, and so the
+# disassembler has had to guess as the instruction class in use).
+
+set got [binutils_run $OBJDUMP "$OBJDUMPFLAGS --disassemble $objfile"]
+
+set want "Warning: disassembly.*dsubh12\[ \t\]*r0,r2,r4.*dmulh12.f\[ \t\]*r0,r2,r4.*dmulh11.f"
+
+if [regexp $want $got] then {
+    pass "Warning test"
+} else {
+    fail "Warning test"
+}