diff --git a/CMakeLists.txt b/CMakeLists.txt
index deeef99a..29bbf036 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -8,7 +8,6 @@ option(BUILD_SHARED_LIBS "Build using shared libraries" OFF)
 
 include_directories(include)
 
-#enable_language(ASM)
 
 
 set(src
@@ -76,6 +75,14 @@ set(src
 	src/tls13.c
 )
 
+option(ENABLE_SM3_AVX_BMI2 "Enable SM3 AVX+BMI2 assembly implementation" OFF)
+
+
+if (ENABLE_SM3_AVX_BMI2)
+	enable_language(ASM)
+	list(APPEND src src/sm3_avx_bmi2.s)
+endif()
+
 if (WIN32)
 	list(APPEND src src/u_time.c)
 	list(APPEND src src/rand_win.c)
@@ -247,4 +254,4 @@ if (CMAKE_C_COMPILER_ID MATCHES "MSVC")
 	target_compile_options(gmssl PRIVATE /wd4996)
 	target_compile_options(gmssl-bin PRIVATE /wd4996)
 #	target_compile_options(gmssl PRIVATE /wd4996)
-endif()
\ No newline at end of file
+endif()
diff --git a/src/sm3.c b/src/sm3.c
index 6ab76cee..e68be8e8 100644
--- a/src/sm3.c
+++ b/src/sm3.c
@@ -152,6 +152,7 @@ static uint32_t K[64] = {
 	*/
 };
 
+#ifndef ENABLE_SM3_AVX_BMI2
 void sm3_compress_blocks(uint32_t digest[8], const uint8_t *data, size_t blocks)
 {
 	uint32_t A;
@@ -293,7 +294,7 @@ void sm3_compress_blocks(uint32_t digest[8], const uint8_t *data, size_t blocks)
 		data += 64;
 	}
 }
-
+#endif
 
 void sm3_init(SM3_CTX *ctx)
 {
@@ -311,7 +312,7 @@ void sm3_init(SM3_CTX *ctx)
 void sm3_update(SM3_CTX *ctx, const uint8_t *data, size_t data_len)
 {
 	size_t blocks;
-	
+
 	ctx->num &= 0x3f;
 	if (ctx->num) {
 		size_t left = SM3_BLOCK_SIZE - ctx->num;