Index: llvm/trunk/test/MC/X86/RDPMC-32.s
===================================================================
--- llvm/trunk/test/MC/X86/RDPMC-32.s
+++ llvm/trunk/test/MC/X86/RDPMC-32.s
@@ -0,0 +1,6 @@
+// RUN: llvm-mc -triple i386-unknown-unknown --show-encoding %s | FileCheck %s
+
+// CHECK: rdpmc 
+// CHECK: encoding: [0x0f,0x33]          
+rdpmc 
+
Index: llvm/trunk/test/MC/X86/RDPMC-64.s
===================================================================
--- llvm/trunk/test/MC/X86/RDPMC-64.s
+++ llvm/trunk/test/MC/X86/RDPMC-64.s
@@ -0,0 +1,6 @@
+// RUN: llvm-mc -triple x86_64-unknown-unknown --show-encoding %s | FileCheck %s
+
+// CHECK: rdpmc 
+// CHECK: encoding: [0x0f,0x33]          
+rdpmc 
+
Index: llvm/trunk/test/MC/X86/RDRAND-32.s
===================================================================
--- llvm/trunk/test/MC/X86/RDRAND-32.s
+++ llvm/trunk/test/MC/X86/RDRAND-32.s
@@ -0,0 +1,6 @@
+// RUN: llvm-mc -triple i386-unknown-unknown --show-encoding %s | FileCheck %s
+
+// CHECK: rdrandl %eax 
+// CHECK: encoding: [0x0f,0xc7,0xf0]         
+rdrandl %eax 
+
Index: llvm/trunk/test/MC/X86/RDRAND-64.s
===================================================================
--- llvm/trunk/test/MC/X86/RDRAND-64.s
+++ llvm/trunk/test/MC/X86/RDRAND-64.s
@@ -0,0 +1,14 @@
+// RUN: llvm-mc -triple x86_64-unknown-unknown --show-encoding %s | FileCheck %s
+
+// CHECK: rdrandl %r13d 
+// CHECK: encoding: [0x41,0x0f,0xc7,0xf5]         
+rdrandl %r13d 
+
+// CHECK: rdrandq %r13 
+// CHECK: encoding: [0x49,0x0f,0xc7,0xf5]         
+rdrandq %r13 
+
+// CHECK: rdrandw %r13w 
+// CHECK: encoding: [0x66,0x41,0x0f,0xc7,0xf5]         
+rdrandw %r13w 
+
Index: llvm/trunk/test/MC/X86/RDSEED-32.s
===================================================================
--- llvm/trunk/test/MC/X86/RDSEED-32.s
+++ llvm/trunk/test/MC/X86/RDSEED-32.s
@@ -0,0 +1,6 @@
+// RUN: llvm-mc -triple i386-unknown-unknown --show-encoding %s | FileCheck %s
+
+// CHECK: rdseedl %eax 
+// CHECK: encoding: [0x0f,0xc7,0xf8]         
+rdseedl %eax 
+
Index: llvm/trunk/test/MC/X86/RDSEED-64.s
===================================================================
--- llvm/trunk/test/MC/X86/RDSEED-64.s
+++ llvm/trunk/test/MC/X86/RDSEED-64.s
@@ -0,0 +1,14 @@
+// RUN: llvm-mc -triple x86_64-unknown-unknown --show-encoding %s | FileCheck %s
+
+// CHECK: rdseedl %r13d 
+// CHECK: encoding: [0x41,0x0f,0xc7,0xfd]         
+rdseedl %r13d 
+
+// CHECK: rdseedq %r13 
+// CHECK: encoding: [0x49,0x0f,0xc7,0xfd]         
+rdseedq %r13 
+
+// CHECK: rdseedw %r13w 
+// CHECK: encoding: [0x66,0x41,0x0f,0xc7,0xfd]         
+rdseedw %r13w 
+
Index: llvm/trunk/test/MC/X86/RDTSCP-32.s
===================================================================
--- llvm/trunk/test/MC/X86/RDTSCP-32.s
+++ llvm/trunk/test/MC/X86/RDTSCP-32.s
@@ -0,0 +1,6 @@
+// RUN: llvm-mc -triple i386-unknown-unknown --show-encoding %s | FileCheck %s
+
+// CHECK: rdtscp 
+// CHECK: encoding: [0x0f,0x01,0xf9]          
+rdtscp 
+
Index: llvm/trunk/test/MC/X86/RDTSCP-64.s
===================================================================
--- llvm/trunk/test/MC/X86/RDTSCP-64.s
+++ llvm/trunk/test/MC/X86/RDTSCP-64.s
@@ -0,0 +1,6 @@
+// RUN: llvm-mc -triple x86_64-unknown-unknown --show-encoding %s | FileCheck %s
+
+// CHECK: rdtscp 
+// CHECK: encoding: [0x0f,0x01,0xf9]          
+rdtscp 
+
Index: llvm/trunk/test/MC/X86/RDWRFSGS-64.s
===================================================================
--- llvm/trunk/test/MC/X86/RDWRFSGS-64.s
+++ llvm/trunk/test/MC/X86/RDWRFSGS-64.s
@@ -0,0 +1,34 @@
+// RUN: llvm-mc -triple x86_64-unknown-unknown --show-encoding %s | FileCheck %s
+
+// CHECK: rdfsbasel %r13d 
+// CHECK: encoding: [0xf3,0x41,0x0f,0xae,0xc5]         
+rdfsbasel %r13d 
+
+// CHECK: rdfsbaseq %r13 
+// CHECK: encoding: [0xf3,0x49,0x0f,0xae,0xc5]         
+rdfsbaseq %r13 
+
+// CHECK: rdgsbasel %r13d 
+// CHECK: encoding: [0xf3,0x41,0x0f,0xae,0xcd]         
+rdgsbasel %r13d 
+
+// CHECK: rdgsbaseq %r13 
+// CHECK: encoding: [0xf3,0x49,0x0f,0xae,0xcd]         
+rdgsbaseq %r13 
+
+// CHECK: wrfsbasel %r13d 
+// CHECK: encoding: [0xf3,0x41,0x0f,0xae,0xd5]         
+wrfsbasel %r13d 
+
+// CHECK: wrfsbaseq %r13 
+// CHECK: encoding: [0xf3,0x49,0x0f,0xae,0xd5]         
+wrfsbaseq %r13 
+
+// CHECK: wrgsbasel %r13d 
+// CHECK: encoding: [0xf3,0x41,0x0f,0xae,0xdd]         
+wrgsbasel %r13d 
+
+// CHECK: wrgsbaseq %r13 
+// CHECK: encoding: [0xf3,0x49,0x0f,0xae,0xdd]         
+wrgsbaseq %r13 
+