1. Added comments to ASM files

[mirror_edk2.git] / MdePkg / Library / BaseLib / X64 / ReadMm3.asm

diff --git a/MdePkg/Library/BaseLib/X64/ReadMm3.asm b/MdePkg/Library/BaseLib/X64/ReadMm3.asm
index 6283c30285fa1dd7d8e4044f0424419fbc838526..aca6f3d2df0529528f929ce58ed92f989018f182 100644 (file)
--- a/MdePkg/Library/BaseLib/X64/ReadMm3.asm
+++ b/MdePkg/Library/BaseLib/X64/ReadMm3.asm
@@ -31,6 +31,9 @@
 ;   );\r
 ;------------------------------------------------------------------------------\r
 AsmReadMm3  PROC\r
+    ;\r
+    ; 64-bit MASM doesn't support MMX instructions, so use opcode here\r
+    ;\r
     DB      48h, 0fh, 7eh, 0d8h\r
     ret\r
 AsmReadMm3  ENDP\r