Enable Intel WBNOINVD instruction.

Intel has disclosed a set of new instructions for Icelake processor.
The spec is
https://software.intel.com/sites/default/files/managed/c5/15/architecture-instruction-set-extensions-programming-reference.pdf

This patch enables Intel WBNOINVD instruction.

gas/
	* config/tc-i386.c (cpu_arch): Add .wbnoinvd.
	* doc/c-i386.texi: Document .wbnoinvd.
	* testsuite/gas/i386/i386.exp: Add WBNOINVD tests.
	* testsuite/gas/i386/wbnoinvd-intel.d: New test.
	* testsuite/gas/i386/wbnoinvd.d: Likewise.
	* testsuite/gas/i386/wbnoinvd.s: Likewise.
	* testsuite/gas/i386/x86-64-wbnoinvd-intel.d: Likewise.
	* testsuite/gas/i386/x86-64-wbnoinvd.d: Likewise.
	* testsuite/gas/i386/x86-64-wbnoinvd.s: Likewise.
opcodes/
	* i386-dis.c (enum): Add PREFIX_0F09.
	* i386-gen.c (cpu_flag_init): Add CPU_WBNOINVD_FLAGS.
	(cpu_flags): Add CpuWBNOINVD.
	* i386-opc.h (enum): Add CpuWBNOINVD.
	(i386_cpu_flags): Add cpuwbnoinvd.
	* i386-opc.tbl: Add WBNOINVD instruction.
	* i386-init.h: Regenerate.
	* i386-tbl.h: Likewise.

7 files changed, 58 insertions, 0 deletions

diff --git a/gas/testsuite/gas/i386/i386.exp b/gas/testsuite/gas/i386/i386.exp
index b81cc20..4123cd8 100644
--- a/gas/testsuite/gas/i386/i386.exp
+++ b/gas/testsuite/gas/i386/i386.exp
@@ -413,6 +413,8 @@ if [expr ([istarget "i*86-*-*"] ||  [istarget "x86_64-*-*"]) && [gas_32_check]]
     run_dump_test "vaes-intel"
     run_dump_test "vpclmulqdq"
     run_dump_test "vpclmulqdq-intel"
+    run_dump_test "wbnoinvd"
+    run_dump_test "wbnoinvd-intel"
     run_list_test "avx512vl-1" "-al"
     run_list_test "avx512vl-2" "-al"
     run_dump_test "fpu-bad"
@@ -880,6 +882,8 @@ if [expr ([istarget "i*86-*-*"] || [istarget "x86_64-*-*"]) && [gas_64_check]] t
     run_dump_test "x86-64-vaes-intel"
     run_dump_test "x86-64-vpclmulqdq"
     run_dump_test "x86-64-vpclmulqdq-intel"
+    run_dump_test "x86-64-wbnoinvd"
+    run_dump_test "x86-64-wbnoinvd-intel"
     run_dump_test "x86-64-fence-as-lock-add-yes"
     run_dump_test "x86-64-fence-as-lock-add-no"
     run_dump_test "x86-64-pr20141"
diff --git a/gas/testsuite/gas/i386/wbnoinvd-intel.d b/gas/testsuite/gas/i386/wbnoinvd-intel.d
new file mode 100644
index 0000000..34d390e
--- /dev/null
+++ b/gas/testsuite/gas/i386/wbnoinvd-intel.d
@@ -0,0 +1,11 @@
+#objdump: -dwMintel
+#name: i386 WBNOINVD (Intel disassembly)
+#source: wbnoinvd.s
+
+.*: +file format .*
+
+Disassembly of section .text:
+
+0+ <_start>:
+[ 	]*[a-f0-9]+:[ 	]*f3 0f 09[ 	]*wbnoinvd[ 	]*
+#pass
diff --git a/gas/testsuite/gas/i386/wbnoinvd.d b/gas/testsuite/gas/i386/wbnoinvd.d
new file mode 100644
index 0000000..051b3d0
--- /dev/null
+++ b/gas/testsuite/gas/i386/wbnoinvd.d
@@ -0,0 +1,11 @@
+#objdump: -dw
+#name: i386 WBNOINVD insn
+
+.*: +file format .*
+
+
+Disassembly of section .text:
+
+0+ <_start>:
+[ 	]*[a-f0-9]+:[ 	]*f3 0f 09[ 	]*wbnoinvd[ 	]*
+#pass
diff --git a/gas/testsuite/gas/i386/wbnoinvd.s b/gas/testsuite/gas/i386/wbnoinvd.s
new file mode 100644
index 0000000..28f9ae3
--- /dev/null
+++ b/gas/testsuite/gas/i386/wbnoinvd.s
@@ -0,0 +1,5 @@
+# Check 32bit WBNOINVD instructions.
+
+	.text
+_start:
+	wbnoinvd
diff --git a/gas/testsuite/gas/i386/x86-64-wbnoinvd-intel.d b/gas/testsuite/gas/i386/x86-64-wbnoinvd-intel.d
new file mode 100644
index 0000000..34d390e
--- /dev/null
+++ b/gas/testsuite/gas/i386/x86-64-wbnoinvd-intel.d
@@ -0,0 +1,11 @@
+#objdump: -dwMintel
+#name: i386 WBNOINVD (Intel disassembly)
+#source: wbnoinvd.s
+
+.*: +file format .*
+
+Disassembly of section .text:
+
+0+ <_start>:
+[ 	]*[a-f0-9]+:[ 	]*f3 0f 09[ 	]*wbnoinvd[ 	]*
+#pass
diff --git a/gas/testsuite/gas/i386/x86-64-wbnoinvd.d b/gas/testsuite/gas/i386/x86-64-wbnoinvd.d
new file mode 100644
index 0000000..051b3d0
--- /dev/null
+++ b/gas/testsuite/gas/i386/x86-64-wbnoinvd.d
@@ -0,0 +1,11 @@
+#objdump: -dw
+#name: i386 WBNOINVD insn
+
+.*: +file format .*
+
+
+Disassembly of section .text:
+
+0+ <_start>:
+[ 	]*[a-f0-9]+:[ 	]*f3 0f 09[ 	]*wbnoinvd[ 	]*
+#pass
diff --git a/gas/testsuite/gas/i386/x86-64-wbnoinvd.s b/gas/testsuite/gas/i386/x86-64-wbnoinvd.s
new file mode 100644
index 0000000..c0359bf
--- /dev/null
+++ b/gas/testsuite/gas/i386/x86-64-wbnoinvd.s
@@ -0,0 +1,5 @@
+# Check 64bit WBNOINVD instructions.
+
+	.text
+_start:
+	wbnoinvd