Implement xgetbv and xsetbv.

Patch by Jai Menon.

llvm-svn: 126165

4 files changed, 19 insertions, 0 deletions

diff --git a/llvm/lib/Target/X86/X86InstrFormats.td b/llvm/lib/Target/X86/X86InstrFormats.td
index 344c14c112a..0660072589e 100644
--- a/llvm/lib/Target/X86/X86InstrFormats.td
+++ b/llvm/lib/Target/X86/X86InstrFormats.td
@@ -41,6 +41,8 @@ def MRM_F8 : Format<41>;
 def MRM_F9 : Format<42>;
 def RawFrmImm8 : Format<43>;
 def RawFrmImm16 : Format<44>;
+def MRM_D0 : Format<45>;
+def MRM_D1 : Format<46>;
 
 // ImmType - This specifies the immediate type used by an instruction. This is
 // part of the ad-hoc solution used to emit machine instruction encodings by our
diff --git a/llvm/lib/Target/X86/X86InstrInfo.h b/llvm/lib/Target/X86/X86InstrInfo.h
index 1d442078727..fcb5a25104a 100644
--- a/llvm/lib/Target/X86/X86InstrInfo.h
+++ b/llvm/lib/Target/X86/X86InstrInfo.h
@@ -311,6 +311,8 @@ namespace X86II {
     MRM_F0 = 40,
     MRM_F8 = 41,
     MRM_F9 = 42,
+    MRM_D0 = 45,
+    MRM_D1 = 46,
 
     /// RawFrmImm8 - This is used for the ENTER instruction, which has two
     /// immediates, the first of which is a 16-bit immediate (specified by
@@ -577,6 +579,8 @@ namespace X86II {
     case X86II::MRM_F0:
     case X86II::MRM_F8:
     case X86II::MRM_F9:
+    case X86II::MRM_D0:
+    case X86II::MRM_D1:
       return -1;
     }
   }
diff --git a/llvm/lib/Target/X86/X86InstrSystem.td b/llvm/lib/Target/X86/X86InstrSystem.td
index 1a58ba0f96e..6a24d145c69 100644
--- a/llvm/lib/Target/X86/X86InstrSystem.td
+++ b/llvm/lib/Target/X86/X86InstrSystem.td
@@ -388,3 +388,8 @@ 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;
 
+let Defs = [RDX, RAX], Uses = [RCX] in
+  def XGETBV : I<0x01, MRM_D0, (outs), (ins), "xgetbv", []>, TB;
+
+let Uses = [RDX, RAX, RCX] in
+  def XSETBV : I<0x01, MRM_D1, (outs), (ins), "xsetbv", []>, TB;
diff --git a/llvm/lib/Target/X86/X86MCCodeEmitter.cpp b/llvm/lib/Target/X86/X86MCCodeEmitter.cpp
index e6dc74e65d7..0e3b5711f2b 100644
--- a/llvm/lib/Target/X86/X86MCCodeEmitter.cpp
+++ b/llvm/lib/Target/X86/X86MCCodeEmitter.cpp
@@ -979,6 +979,14 @@ EncodeInstruction(const MCInst &MI, raw_ostream &OS,
     EmitByte(BaseOpcode, CurByte, OS);
     EmitByte(0xF9, CurByte, OS);
     break;
+  case X86II::MRM_D0:
+    EmitByte(BaseOpcode, CurByte, OS);
+    EmitByte(0xD0, CurByte, OS);
+    break;
+  case X86II::MRM_D1:
+    EmitByte(BaseOpcode, CurByte, OS);
+    EmitByte(0xD1, CurByte, OS);
+    break;
   }
 
   // If there is a remaining operand, it must be a trailing immediate.  Emit it