Refine comments of X64 assembly files of MDE BaseLib.

[mirror_edk2.git] / MdePkg / Library / BaseLib / X64 / WriteMsr64.S

diff --git a/MdePkg/Library/BaseLib/X64/WriteMsr64.S b/MdePkg/Library/BaseLib/X64/WriteMsr64.S
index 2b0a557128810bfb0c88d476f92040941fcd267d..4a06f85e8acf01cf4b6607df23956a149bfaedcc 100644 (file)
--- a/MdePkg/Library/BaseLib/X64/WriteMsr64.S
+++ b/MdePkg/Library/BaseLib/X64/WriteMsr64.S
@@ -1,6 +1,6 @@
 #------------------------------------------------------------------------------
 #
-# Copyright (c) 2006, Intel Corporation
+# Copyright (c) 2006 - 2008, Intel Corporation
 # All rights reserved. This program and the accompanying materials
 # are licensed and made available under the terms and conditions of the BSD License
 # which accompanies this distribution.  The full text of the license may be found at
@@ -29,12 +29,11 @@
 #   IN UINT32  Index,
 #   IN UINT64  Value
 #   );
-# TODO:
 #------------------------------------------------------------------------------
 .global ASM_PFX(AsmWriteMsr64)
 .align 16
 ASM_PFX(AsmWriteMsr64):
-    mov        %rdx, %rax
-    shr $0x20, %rdx
+    mov        %rdx, %rax            # meanwhile, rax <- return value
+    shr $0x20, %rdx           # edx:eax contains the value to write
     wrmsr
     ret