Doxygenize the documentation comments

src/IceRegistersX8632.h

Index: src/IceRegistersX8632.h
diff --git a/src/IceRegistersX8632.h b/src/IceRegistersX8632.h
index d7bfd6f7db6d68c005f84d59b30fedee50a4d68c..7cce6619b42b199a1c0f704a1322e53a7c5ddf85 100644
--- a/src/IceRegistersX8632.h
+++ b/src/IceRegistersX8632.h
@@ -6,9 +6,10 @@
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
-//
-// This file declares the registers and their encodings for x86-32.
-//
+///
+/// \file
+/// This file declares the registers and their encodings for x86-32.
+///
 //===----------------------------------------------------------------------===//
 
 #ifndef SUBZERO_SRC_ICEREGISTERSX8632_H
@@ -22,8 +23,8 @@ namespace Ice {
 
 class RegX8632 {
 public:
-  // An enum of every register. The enum value may not match the encoding
-  // used to binary encode register operands in instructions.
+  /// An enum of every register. The enum value may not match the encoding
+  /// used to binary encode register operands in instructions.
   enum AllRegisters {
 #define X(val, encode, name, name16, name8, scratch, preserved, stackptr,      \
           frameptr, isI8, isInt, isFP)                                         \
@@ -36,8 +37,8 @@ public:
 #undef X
   };
 
-  // An enum of GPR Registers. The enum value does match the encoding used
-  // to binary encode register operands in instructions.
+  /// An enum of GPR Registers. The enum value does match the encoding used
+  /// to binary encode register operands in instructions.
   enum GPRRegister {
 #define X(val, encode, name, name16, name8, scratch, preserved, stackptr,      \
           frameptr, isI8, isInt, isFP)                                         \
@@ -47,8 +48,8 @@ public:
         Encoded_Not_GPR = -1
   };
 
-  // An enum of XMM Registers. The enum value does match the encoding used
-  // to binary encode register operands in instructions.
+  /// An enum of XMM Registers. The enum value does match the encoding used
+  /// to binary encode register operands in instructions.
   enum XmmRegister {
 #define X(val, encode, name, name16, name8, scratch, preserved, stackptr,      \
           frameptr, isI8, isInt, isFP)                                         \
@@ -58,8 +59,8 @@ public:
         Encoded_Not_Xmm = -1
   };
 
-  // An enum of Byte Registers. The enum value does match the encoding used
-  // to binary encode register operands in instructions.
+  /// An enum of Byte Registers. The enum value does match the encoding used
+  /// to binary encode register operands in instructions.
   enum ByteRegister {
 #define X(val, encode) Encoded_##val encode,
     REGX8632_BYTEREG_TABLE
@@ -67,8 +68,8 @@ public:
         Encoded_Not_ByteReg = -1
   };
 
-  // An enum of X87 Stack Registers. The enum value does match the encoding used
-  // to binary encode register operands in instructions.
+  /// An enum of X87 Stack Registers. The enum value does match the encoding used
+  /// to binary encode register operands in instructions.
   enum X87STRegister {
 #define X(val, encode, name) Encoded_##val encode,
     X87ST_REGX8632_TABLE