.code\r
\r
;------------------------------------------------------------------------------\r
-; UINTN\r
+; UINT64\r
; EFIAPI\r
; AsmReadMm3 (\r
; VOID\r
; );\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