diff --git a/SM2-WWMM-(2).md b/SM2-WWMM-(2).md
index 76c4e19..19954d7 100644
--- a/SM2-WWMM-(2).md
+++ b/SM2-WWMM-(2).md
@@ -617,6 +617,6 @@ $T_3=(t_4+Y-Y>>32) \ast 2^{256}+(t_3 - Y<<32) \ast 2^{192} + (t_2 - Y) \ast 2^{1
 ```
 vs.
 ```asm
-  MOVQ t0, AX
-  MULQ $0x100000000
+  MOVQ $0x100000000, AX
+  MULQ t0
 ```