diff --git a/src/fp_generator.hpp b/src/fp_generator.hpp
index 4628ff8..2dca191 100644
--- a/src/fp_generator.hpp
+++ b/src/fp_generator.hpp
@@ -324,16 +324,14 @@ private:
 		if (func) {
 			op.fp_sqrA_ = reinterpret_cast<void2u>(func);
 		}
-		if (op.N > 4) return;
 		if (op.primeMode != PM_NIST_P192 && op.N <= 4) { // support general op.N but not fast for op.N > 4
 			align(16);
 			op.fp_preInv = getCurr<int2u>();
 			gen_preInv();
 		}
+		op.fp2_addA_ = gen_fp2_add();
+
 		if (op.N == 4 && !isFullBit_) {
-			align(16);
-			op.fp2_addA_ = getCurr<void3u>();
-			gen_fp2_add4();
 			align(16);
 			op.fp2_subA_ = getCurr<void3u>();
 			gen_fp2_sub4();
@@ -3505,6 +3503,36 @@ private:
 		gen_raw_fp_add(sf.p[0], sf.p[1], sf.p[2], sf.t, false);
 		gen_raw_fp_add(sf.p[0] + FpByte_, sf.p[1] + FpByte_, sf.p[2] + FpByte_, sf.t, false);
 	}
+	void gen_fp2_add6()
+	{
+		assert(!isFullBit_);
+		StackFrame sf(this, 3, 10);
+		const Reg64& pz = sf.p[0];
+		const Reg64& px = sf.p[1];
+		const Reg64& py = sf.p[2];
+		Pack t1 = sf.t.sub(0, 6);
+		Pack t2 = sf.t.sub(6);
+		t2.append(rax);
+		t2.append(px); // destory after used
+		movq(xm0, px);
+		gen_raw_fp_add6(pz, px, py, 0, t1, t2, false);
+		movq(px, xm0);
+		gen_raw_fp_add6(pz, px, py, FpByte_, t1, t2, false);
+	}
+	void3u gen_fp2_add()
+	{
+		align(16);
+		void3u func = getCurr<void3u>();
+		if (pn_ == 4 && !isFullBit_) {
+			gen_fp2_add4();
+			return func;
+		}
+		if (pn_ == 6 && !isFullBit_) {
+			gen_fp2_add6();
+			return func;
+		}
+		return 0;
+	}
 	void gen_fp2_sub4()
 	{
 		assert(!isFullBit_);
diff --git a/test/bls12_test.cpp b/test/bls12_test.cpp
index 42a013d..8722e76 100644
--- a/test/bls12_test.cpp
+++ b/test/bls12_test.cpp
@@ -687,6 +687,11 @@ int main(int argc, char *argv[])
 	}
 	FpDbl dx;
 	FpDbl::mulPre(dx, xv[0], yv[0]);
+	Fp2 x2, y2;
+	x2.a.setByCSPRNG(rg);
+	x2.b.setByCSPRNG(rg);
+	y2.a.setByCSPRNG(rg);
+	y2.b.setByCSPRNG(rg);
 if(0){
 	puts("----------");
 	xv[0].dump();
@@ -695,12 +700,13 @@ if(0){
 	puts("----------");
 //	exit(1);
 }
-//	CYBOZU_BENCH_C("subDbl", 10000000, FpDbl::sub, dx, dx, dx);
+	CYBOZU_BENCH_C("Fp2::add", 10000000, Fp2::add, x2, x2, y2);
+	CYBOZU_BENCH_C("Fp2::sub", 10000000, Fp2::sub, x2, x2, y2);
 //	CYBOZU_BENCH_C("mulPre", 100000000, FpDbl::mulPre, dx, xv[0], yv[0]);
 //	CYBOZU_BENCH_C("sqrPre", 100000000, FpDbl::sqrPre, dx, xv[0]);
 //	CYBOZU_BENCH_C("mod   ", 100000000, FpDbl::mod, xv[0], dx);
-	CYBOZU_BENCH_C("mul   ", 100000000, Fp::mul, xv[0], yv[0], xv[0]);
-	CYBOZU_BENCH_C("sqr   ", 100000000, Fp::sqr, xv[0], xv[0]);
+//	CYBOZU_BENCH_C("mul   ", 100000000, Fp::mul, xv[0], yv[0], xv[0]);
+//	CYBOZU_BENCH_C("sqr   ", 100000000, Fp::sqr, xv[0], xv[0]);
 	return 0;
 #endif
 	return cybozu::test::autoRun.run(argc, argv);