1. Added comments to ASM files

[mirror_edk2.git] / MdePkg / Library / BaseLib / X64 / WriteMm6.asm

diff --git a/MdePkg/Library/BaseLib/X64/WriteMm6.asm b/MdePkg/Library/BaseLib/X64/WriteMm6.asm
index cb32ea6dc384581cdefe7a59d5410a5aef6a4b4a..cd5938828d8150720d3a9f1b676c39eaafef6ecf 100644 (file)
--- a/MdePkg/Library/BaseLib/X64/WriteMm6.asm
+++ b/MdePkg/Library/BaseLib/X64/WriteMm6.asm
@@ -31,6 +31,9 @@
 ;   );\r
 ;------------------------------------------------------------------------------\r
 AsmWriteMm6 PROC\r
+    ;\r
+    ; 64-bit MASM doesn't support MMX instructions, so use opcode here\r
+    ;\r
     DB      48h, 0fh, 6eh, 0f1h\r
     ret\r
 AsmWriteMm6 ENDP\r