[ARC] Fix and extend features of .cpu directive.

gas/
2016-11-18  Claudiu Zissulescu  <claziss@synopsys.com>

	* testsuite/gas/arc/cl-warn.s: New file.
	* testsuite/gas/arc/cpu-pseudop-1.d: Likewise.
	* testsuite/gas/arc/cpu-pseudop-1.s: Likewise.
	* testsuite/gas/arc/cpu-pseudop-2.d: Likewise.
	* testsuite/gas/arc/cpu-pseudop-2.s: Likewise.
	* testsuite/gas/arc/cpu-warn2.s: Likewise.
	* config/tc-arc.c (selected_cpu): Initialize.
	(feature_type): New struct.
	(feature_list): New variable.
	(arc_check_feature): New function.
	(arc_select_cpu): Check for .cpu duplicates. Don't overwrite the
	current cpu features. Check if a feature is available for a given
	cpu.
	(md_parse_option): Test if features are available for a given cpu.

6 files changed, 43 insertions, 0 deletions

diff --git a/gas/testsuite/gas/arc/cl-warn.s b/gas/testsuite/gas/arc/cl-warn.s
new file mode 100644
index 0000000..63199cf
--- /dev/null
+++ b/gas/testsuite/gas/arc/cl-warn.s
@@ -0,0 +1,5 @@
+; Test command line option compatibility checking.
+; { dg-do assemble }
+; { dg-options "--mcpu=archs -mdpfp" }
+; { dg-error ".* invalid double-precision FPX option for archs cpu" "" { target arc*-*-* } 0 }
+	nop
diff --git a/gas/testsuite/gas/arc/cpu-pseudop-1.d b/gas/testsuite/gas/arc/cpu-pseudop-1.d
new file mode 100644
index 0000000..09c47c9
--- /dev/null
+++ b/gas/testsuite/gas/arc/cpu-pseudop-1.d
@@ -0,0 +1,12 @@
+#as: -mcpu=arcem -mcode-density -mdpfp
+#objdump: -dp -M dpfp
+
+.*: +file format .*arc.*
+private flags = 0x305: -mcpu=ARCv2EM .*
+
+
+Disassembly of section .text:
+
+00000000 <.text>:
+   0:	4af7                	sub_s	r15,r2,r15
+   2:	3211 00c1           	dsubh12	r1,r2,r3
diff --git a/gas/testsuite/gas/arc/cpu-pseudop-1.s b/gas/testsuite/gas/arc/cpu-pseudop-1.s
new file mode 100644
index 0000000..40217aa
--- /dev/null
+++ b/gas/testsuite/gas/arc/cpu-pseudop-1.s
@@ -0,0 +1,6 @@
+;;; Check if user can use additional command line options.
+	.cpu EM
+	.section	.text
+
+	sub_s r15,r2,r15	;code density instruction
+	dsubh12 r1,r2,r3	;double-precision instruction
diff --git a/gas/testsuite/gas/arc/cpu-pseudop-2.d b/gas/testsuite/gas/arc/cpu-pseudop-2.d
new file mode 100644
index 0000000..3bde329
--- /dev/null
+++ b/gas/testsuite/gas/arc/cpu-pseudop-2.d
@@ -0,0 +1,11 @@
+#as: -mcpu=archs
+#objdump: -dp
+
+.*: +file format .*arc.*
+private flags = 0x306: -mcpu=ARCv2HS .*
+
+
+Disassembly of section .text:
+
+00000000 <.text>:
+   0:	4af7                	sub_s	r15,r2,r15
diff --git a/gas/testsuite/gas/arc/cpu-pseudop-2.s b/gas/testsuite/gas/arc/cpu-pseudop-2.s
new file mode 100644
index 0000000..def89d6
--- /dev/null
+++ b/gas/testsuite/gas/arc/cpu-pseudop-2.s
@@ -0,0 +1,5 @@
+;;; Check if user can use additional command line options.
+	.cpu EM
+	.section	.text
+
+	sub_s r15,r2,r15	;code density instruction
diff --git a/gas/testsuite/gas/arc/cpu-warn2.s b/gas/testsuite/gas/arc/cpu-warn2.s
new file mode 100644
index 0000000..e9ee338
--- /dev/null
+++ b/gas/testsuite/gas/arc/cpu-warn2.s
@@ -0,0 +1,4 @@
+; Test warnings when multiple .cpu pseudo-ops are defined.
+; { dg-do assemble }
+	.cpu EM
+	.cpu HS			;{ dg-error "Error: Multiple .cpu directives found" }