Support Intel WRMSRNS

gas/ChangeLog:

        * NEWS: Support Intel WRMSRNS.
        * config/tc-i386.c: Add wrmsrns.
        * doc/c-i386.texi: Document .wrmsrns.
        * testsuite/gas/i386/i386.exp: Add WRMSRNS tests.
        * testsuite/gas/i386/wrmsrns-intel.d: New test.
        * testsuite/gas/i386/wrmsrns.d: Ditto.
        * testsuite/gas/i386/wrmsrns.s: Ditto.
        * testsuite/gas/i386/x86-64-wrmsrns-intel.d: Ditto.
        * testsuite/gas/i386/x86-64-wrmsrns.d: Ditto.

opcodes/ChangeLog:

	* i386-dis.c (PREFIX_0F01_REG_0_MOD_3_RM_6): New.
	(prefix_table): Add PREFIX_0F01_REG_0_MOD_3_RM_6.
	(rm_table): New entry for wrmsrns.
	* i386-gen.c (cpu_flag_init): Add CPU_WRMSRNS_FLAGS
	and CPU_ANY_WRMSRNS_FLAGS.
	(cpu_flags): Add CpuWRMSRNS.
        * i386-init.h: Regenerated.
        * i386-opc.h (CpuWRMSRNS): New.
	(i386_cpu_flags): Add cpuwrmsrns.
        * i386-opc.tbl: Add WRMSRNS instructions.
        * i386-tbl.h: Regenerated.

9 files changed, 44 insertions, 1 deletions

diff --git a/gas/NEWS b/gas/NEWS
index 49eb62f..47d3798 100644
--- a/gas/NEWS
+++ b/gas/NEWS
@@ -1,5 +1,7 @@
 -*- text -*-
 
+* Add support for Intel WRMSRNS instructions.
+
 * Add support for Intel CMPccXADD instructions.
 
 * Add support for Intel AVX-VNNI-INT8 instructions.
diff --git a/gas/config/tc-i386.c b/gas/config/tc-i386.c
index ecf36c8..10de685 100644
--- a/gas/config/tc-i386.c
+++ b/gas/config/tc-i386.c
@@ -1099,6 +1099,7 @@ static const arch_entry cpu_arch[] =
   SUBARCH (avx_ifma, AVX_IFMA, ANY_AVX_IFMA, false),
   SUBARCH (avx_vnni_int8, AVX_VNNI_INT8, ANY_AVX_VNNI_INT8, false),
   SUBARCH (cmpccxadd, CMPCCXADD, ANY_CMPCCXADD, false),
+  SUBARCH (wrmsrns, WRMSRNS, ANY_WRMSRNS, false),
 };
 
 #undef SUBARCH
diff --git a/gas/doc/c-i386.texi b/gas/doc/c-i386.texi
index f98b9fb..47aa02b 100644
--- a/gas/doc/c-i386.texi
+++ b/gas/doc/c-i386.texi
@@ -198,6 +198,7 @@ accept various extension mnemonics.  For example,
 @code{avx_ifma},
 @code{avx_vnni_int8},
 @code{cmpccxadd},
+@code{wrmsrns},
 @code{amx_int8},
 @code{amx_bf16},
 @code{amx_fp16},
@@ -1492,7 +1493,7 @@ supported on the CPU specified.  The choices for @var{cpu_type} are:
 @item @samp{.tdx} @tab @samp{.avx_vnni}  @tab @samp{.avx512_fp16}
 @item @samp{.clwb} @tab @samp{.rdpid} @tab @samp{.ptwrite} @tab @samp{.ibt}
 @item @samp{.prefetchi} @tab @samp{.avx_ifma} @tab @samp{.avx_vnni_int8}
-@item @samp{.cmpccxadd}
+@item @samp{.cmpccxadd} @tab @samp{.wrmsrns}
 @item @samp{.wbnoinvd} @tab @samp{.pconfig} @tab @samp{.waitpkg} @tab @samp{.cldemote}
 @item @samp{.shstk} @tab @samp{.gfni} @tab @samp{.vaes} @tab @samp{.vpclmulqdq}
 @item @samp{.movdiri} @tab @samp{.movdir64b} @tab @samp{.enqcmd} @tab @samp{.tsxldtrk}
diff --git a/gas/testsuite/gas/i386/i386.exp b/gas/testsuite/gas/i386/i386.exp
index b26c4f0..b560131 100644
--- a/gas/testsuite/gas/i386/i386.exp
+++ b/gas/testsuite/gas/i386/i386.exp
@@ -480,6 +480,8 @@ if [gas_32_check] then {
     run_dump_test "avx-vnni-int8"
     run_dump_test "avx-vnni-int8-intel"
     run_list_test "cmpccxadd-inval"
+    run_dump_test "wrmsrns"
+    run_dump_test "wrmsrns-intel"
     run_list_test "sg"
     run_dump_test "clzero"
     run_dump_test "invlpgb"
@@ -1155,6 +1157,8 @@ if [gas_64_check] then {
     run_dump_test "x86-64-avx-vnni-int8-intel"
     run_dump_test "x86-64-cmpccxadd"
     run_dump_test "x86-64-cmpccxadd-intel"
+    run_dump_test "x86-64-wrmsrns"
+    run_dump_test "x86-64-wrmsrns-intel"
     run_dump_test "x86-64-clzero"
     run_dump_test "x86-64-mwaitx-bdver4"
     run_list_test "x86-64-mwaitx-reg"
diff --git a/gas/testsuite/gas/i386/wrmsrns-intel.d b/gas/testsuite/gas/i386/wrmsrns-intel.d
new file mode 100644
index 0000000..b3be260
--- /dev/null
+++ b/gas/testsuite/gas/i386/wrmsrns-intel.d
@@ -0,0 +1,5 @@
+#as:
+#objdump: -dw -Mintel
+#name: i386 WRMSRNS insns (Intel disassembly)
+#source: wrmsrns.s
+#dump: wrmsrns.d
diff --git a/gas/testsuite/gas/i386/wrmsrns.d b/gas/testsuite/gas/i386/wrmsrns.d
new file mode 100644
index 0000000..e804adc
--- /dev/null
+++ b/gas/testsuite/gas/i386/wrmsrns.d
@@ -0,0 +1,12 @@
+#as:
+#objdump: -dw
+#name: i386 WRMSRNS insns
+#source: wrmsrns.s
+
+.*: +file format .*
+
+Disassembly of section \.text:
+
+0+ <_start>:
+\s*[a-f0-9]+:\s*0f 01 c6\s+wrmsrns
+\s*[a-f0-9]+:\s*0f 01 c6\s+wrmsrns
diff --git a/gas/testsuite/gas/i386/wrmsrns.s b/gas/testsuite/gas/i386/wrmsrns.s
new file mode 100644
index 0000000..a450b05
--- /dev/null
+++ b/gas/testsuite/gas/i386/wrmsrns.s
@@ -0,0 +1,8 @@
+# Check WRMSRNS instructions
+
+	.text
+_start:
+	wrmsrns		 #WRMSRNS
+
+.intel_syntax noprefix
+	wrmsrns		 #WRMSRNS
diff --git a/gas/testsuite/gas/i386/x86-64-wrmsrns-intel.d b/gas/testsuite/gas/i386/x86-64-wrmsrns-intel.d
new file mode 100644
index 0000000..ff80e55
--- /dev/null
+++ b/gas/testsuite/gas/i386/x86-64-wrmsrns-intel.d
@@ -0,0 +1,5 @@
+#as:
+#objdump: -dw -Mintel
+#name: x86_64 WRMSRNS insns (Intel disassembly)
+#source: wrmsrns.s
+#dump: wrmsrns.d
diff --git a/gas/testsuite/gas/i386/x86-64-wrmsrns.d b/gas/testsuite/gas/i386/x86-64-wrmsrns.d
new file mode 100644
index 0000000..047f0a1
--- /dev/null
+++ b/gas/testsuite/gas/i386/x86-64-wrmsrns.d
@@ -0,0 +1,5 @@
+#as:
+#objdump: -dw
+#name: x86_64 WRMSRNS insns
+#source: wrmsrns.s
+#dump: wrmsrns.d