diff --git a/internal/sm2ec/p256_asm_loong64.s b/internal/sm2ec/p256_asm_loong64.s
index 03f5eda..2ec8d4a 100644
--- a/internal/sm2ec/p256_asm_loong64.s
+++ b/internal/sm2ec/p256_asm_loong64.s
@@ -414,19 +414,30 @@ TEXT sm2P256SqrInternal<>(SB),NOSPLIT,$0
 	ADDV t1, t2, acc6   // no carry
 
 	// *2
+	// ALSLV is NOT supported in go 1.25
 	SRLV $63, acc1, t0
 	SLLV $1, acc1, acc1
 	SRLV $63, acc2, t1
-	ALSLV $1, t0, acc2, acc2
+	// ALSLV $1, t0, acc2, acc2
+	SLLV $1, acc2, acc2
+	ADDV t0, acc2, acc2
 	SRLV $63, acc3, t2
-	ALSLV $1, t1, acc3, acc3
+	// ALSLV $1, t1, acc3, acc3
+	SLLV $1, acc3, acc3
+	ADDV t1, acc3, acc3
 	SRLV $63, acc4, t3
-	ALSLV $1, t2, acc4, acc4
+	// ALSLV $1, t2, acc4, acc4
+	SLLV $1, acc4, acc4
+	ADDV t2, acc4, acc4
 	SRLV $63, acc5, t4
-	ALSLV $1, t3, acc5, acc5
+	// ALSLV $1, t3, acc5, acc5
+	SLLV $1, acc5, acc5
+	ADDV t3, acc5, acc5
 	SRLV $63, acc6, acc7
-	ALSLV $1, t4, acc6, acc6
-	
+	// ALSLV $1, t4, acc6, acc6
+	SLLV $1, acc6, acc6
+	ADDV t4, acc6, acc6
+
 	// Missing products
 	MULV x0, x0, acc0
 	MULHVU x0, x0, t0