diff --git a/sm2_z256_loong64.S-代码分析.md b/sm2_z256_loong64.S-代码分析.md
index 32a2960..932618f 100644
--- a/sm2_z256_loong64.S-代码分析.md
+++ b/sm2_z256_loong64.S-代码分析.md
@@ -67,6 +67,12 @@ or	$a2, $a2, $a1
 
 **实现思路**：
 1. 可参考https://github.com/emmansun/gmsm/wiki/SM2-WWMM-(2)
+$T_2=T_1 \ast P=t_0 \ast P= t_0 \ast (2^{256}-(2^{32} \ast 2^{192} + 0 \ast 2^{128} + (2^{32} - 1) \ast 2^{64} + 1))$  
+$T_2=t_0 \ast 2^{256} - t_0 \ast 2^{32} \ast 2^{192} - t_0 \ast (2^{32} - 1) \ast 2^{64} - t_0$  
+
+$T_3=T + T_2=t_4 \ast 2^{256} + t_3 \ast 2^{192} + t_2 \ast 2^{128} + t_1 \ast 2^{64} + t_0 \ast 2^{256} - t_0 \ast 2^{32} \ast 2^{192} - t_0 \ast (2^{32} - 1) \ast 2^{64} $  
+$T_3=(t_4+t_0) \ast 2^{256}+(t_3 - t_0 \ast 2^{32}) \ast 2^{192} + t_2 \ast 2^{128} + (t_1 + t_0 - t_0 \ast 2^{32}) \ast 2^{64}  $  
+$T_3=(t_4+t_0-t_0>>32) \ast 2^{256}+(t_3 - t_0<<32) \ast 2^{192} + (t_2 - t_0>>32) \ast 2^{128} + (t_1 + t_0 - t_0<<32) \ast 2^{64}  $