1. Added comments to ASM files

[mirror_edk2.git] / MdePkg / Library / BaseLib / X64 / WriteMm5.asm

diff --git a/MdePkg/Library/BaseLib/X64/WriteMm5.asm b/MdePkg/Library/BaseLib/X64/WriteMm5.asm
index f268bea8ec8966dcbbfb43e077ede93b3dad895d..fbe44ae078682e48de89028e2346d2650c06c62c 100644 (file)
--- a/MdePkg/Library/BaseLib/X64/WriteMm5.asm
+++ b/MdePkg/Library/BaseLib/X64/WriteMm5.asm
@@ -31,6 +31,9 @@
 ;   );\r
 ;------------------------------------------------------------------------------\r
 AsmWriteMm5 PROC\r
+    ;\r
+    ; 64-bit MASM doesn't support MMX instructions, so use opcode here\r
+    ;\r
     DB      48h, 0fh, 6eh, 0e9h\r
     ret\r
 AsmWriteMm5 ENDP\r