Add limitation clarification for usage of AsmPrepareThunk16(), AsmThunk16(), AsmPrepa...

[mirror_edk2.git] / MdePkg / Library / BaseLib / Ia32 / ReadMm4.c

diff --git a/MdePkg/Library/BaseLib/Ia32/ReadMm4.c b/MdePkg/Library/BaseLib/Ia32/ReadMm4.c
index 6e8f9d02f1dec821f917ddb28dca87465c61cf1d..fac8902be3046bf60ec15a33383644c95330485e 100644 (file)
--- a/MdePkg/Library/BaseLib/Ia32/ReadMm4.c
+++ b/MdePkg/Library/BaseLib/Ia32/ReadMm4.c
@@ -1,7 +1,7 @@
 /** @file\r
   AsmReadMm4 function\r
 \r
-  Copyright (c) 2006, Intel Corporation<BR>\r
+  Copyright (c) 2006 - 2008, Intel Corporation<BR>\r
   All rights reserved. This program and the accompanying materials\r
   are licensed and made available under the terms and conditions of the BSD License\r
   which accompanies this distribution.  The full text of the license may be found at\r
@@ -12,8 +12,18 @@
 \r
 **/\r
 \r
-#if _MSC_EXTENSIONS\r
 \r
+\r
+\r
+/**\r
+  Reads the current value of 64-bit MMX Register #4 (MM4).\r
+\r
+  Reads and returns the current value of MM4. This function is only available\r
+  on IA-32 and x64.\r
+\r
+  @return The current value of MM4.\r
+\r
+**/\r
 UINT64\r
 EFIAPI\r
 AsmReadMm4 (\r
@@ -30,4 +40,3 @@ AsmReadMm4 (
   }\r
 }\r
 \r
-#endif\r