1. Added comments to ASM files

[mirror_edk2.git] / MdePkg / Library / BaseLib / X64 / ReadMm2.asm

diff --git a/MdePkg/Library/BaseLib/X64/ReadMm2.asm b/MdePkg/Library/BaseLib/X64/ReadMm2.asm
index 3b2b1e3af3e02de5a268b38c319e830793ced602..860326b37539be4b1faa869192529c865d184551 100644 (file)
--- a/MdePkg/Library/BaseLib/X64/ReadMm2.asm
+++ b/MdePkg/Library/BaseLib/X64/ReadMm2.asm
@@ -31,6 +31,9 @@
 ;   );\r
 ;------------------------------------------------------------------------------\r
 AsmReadMm2  PROC\r
+    ;\r
+    ; 64-bit MASM doesn't support MMX instructions, so use opcode here\r
+    ;\r
     DB      48h, 0fh, 7eh, 0d0h\r
     ret\r
 AsmReadMm2  ENDP\r