From 75fe5f3bab7c33c14e5f7956e01a9d95d2712cc5 Mon Sep 17 00:00:00 2001
From: Craig Topper <craig.topper@gmail.com>
Date: Fri, 7 Oct 2011 07:02:24 +0000
Subject: [PATCH] Add X86 disassembler support for RDFSBASE, RDGSBASE,
 WRFSBASE, and WRGSBASE.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141358 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/X86/X86InstrSystem.td          | 23 ++++++++++++++++++++++
 test/MC/Disassembler/X86/simple-tests.txt | 24 +++++++++++++++++++++++
 2 files changed, 47 insertions(+)

diff --git a/lib/Target/X86/X86InstrSystem.td b/lib/Target/X86/X86InstrSystem.td
index 6c880ed6f91..05a5b36b95e 100644
--- a/lib/Target/X86/X86InstrSystem.td
+++ b/lib/Target/X86/X86InstrSystem.td
@@ -400,6 +400,8 @@ def CPUID : I<0xA2, RawFrm, (outs), (ins), "cpuid", []>, TB;
 def INVD : I<0x08, RawFrm, (outs), (ins), "invd", []>, TB;
 def WBINVD : I<0x09, RawFrm, (outs), (ins), "wbinvd", []>, TB;
 
+//===----------------------------------------------------------------------===//
+// XSAVE instructions
 let Defs = [RDX, RAX], Uses = [RCX] in
   def XGETBV : I<0x01, MRM_D0, (outs), (ins), "xgetbv", []>, TB;
 
@@ -442,3 +444,24 @@ let Defs = [RAX, RSI, RDI], Uses = [RAX, RSI, RDI] in {
 }
 let Defs = [RAX, RDX, RSI], Uses = [RAX, RSI] in
   def MONTMUL : I<0xc0, RawFrm, (outs), (ins), "montmul", []>, A6;
+
+//===----------------------------------------------------------------------===//
+// FS/GS Base Instructions
+let Predicates = [In64BitMode] in {
+  def RDFSBASE : I<0xAE, MRM0r, (outs GR32:$dst), (ins),
+                   "rdfsbase{l}\t$dst", []>, TB, XS;
+  def RDFSBASE64 : RI<0xAE, MRM0r, (outs GR64:$dst), (ins),
+                     "rdfsbase{q}\t$dst", []>, TB, XS;
+  def RDGSBASE : I<0xAE, MRM1r, (outs GR32:$dst), (ins),
+                   "rdgsbase{l}\t$dst", []>, TB, XS;
+  def RDGSBASE64 : RI<0xAE, MRM1r, (outs GR64:$dst), (ins),
+                     "rdgsbase{q}\t$dst", []>, TB, XS;
+  def WRFSBASE : I<0xAE, MRM2r, (outs), (ins GR32:$dst),
+                   "wrfsbase{l}\t$dst", []>, TB, XS;
+  def WRFSBASE64 : RI<0xAE, MRM2r, (outs), (ins GR64:$dst),
+                   "wrfsbase{q}\t$dst", []>, TB, XS;
+  def WRGSBASE : I<0xAE, MRM3r, (outs), (ins GR32:$dst),
+                   "wrgsbase{l}\t$dst", []>, TB, XS;
+  def WRGSBASE64 : RI<0xAE, MRM3r, (outs), (ins GR64:$dst),
+                    "wrgsbase{q}\t$dst", []>, TB, XS;
+}
diff --git a/test/MC/Disassembler/X86/simple-tests.txt b/test/MC/Disassembler/X86/simple-tests.txt
index 34d25caba4f..39e641b18bf 100644
--- a/test/MC/Disassembler/X86/simple-tests.txt
+++ b/test/MC/Disassembler/X86/simple-tests.txt
@@ -431,3 +431,27 @@
 
 # CHECK: xsaveopt (%rax)
 0x0f 0xae 0x30
+
+# CHECK rdfsbasel %eax
+0xf3 0x0f 0xae 0xc0
+
+# CHECK rdgsbasel %eax
+0xf3 0x0f 0xae 0xc8
+
+# CHECK wrfsbasel %eax
+0xf3 0x0f 0xae 0xd0
+
+# CHECK wrgsbasel %eax
+0xf3 0x0f 0xae 0xd8
+
+# CHECK rdfsbaseq %rax
+0xf3 0x48 0x0f 0xae 0xc0
+
+# CHECK rdgsbaseq %rax
+0xf3 0x48 0x0f 0xae 0xc8
+
+# CHECK wrfsbaseq %rax
+0xf3 0x48 0x0f 0xae 0xd0
+
+# CHECK wrgsbaseq %rax
+0xf3 0x48 0x0f 0xae 0xd8