//        |         |
    //      Const_0    Const_1
    //
    const float const0_val[] = {1.0, 2.0, 3.0, 4.0};
    const float const1_val[] = {1.0, 0.0, 0.0, 1.0};
    TF_Operation* const0 = FloatConst2x2(graph_, s_, const0_val, "Const_0");
    TF_Operation* const1 = FloatConst2x2(graph_, s_, const1_val, "Const_1");
    TF_Operation* matmul = MatMul(graph_, s_, const0, const1, "MatMul");
    inputs[0] = TF_Output{const0, 0};

needed // First reduction step ADDS acc0<<32, acc1, acc1 LSR $32, acc0, t0 MUL acc0, const1, t1 UMULH acc0, const1, acc0 ADCS t0, acc2 ADCS t1, acc3 ADC $0, acc0 // Second reduction step ADDS acc1<<32, acc2, acc2 LSR $32, acc1, t0 MUL acc1, const1, t1 UMULH acc1, const1, acc1 ADCS t0, acc3 ADCS t1, acc0 ADC $0, acc1 // Third reduction step ADDS acc2<<32, acc3, acc3 LSR $32, acc2, t0 MUL acc2, const1, t1 UMULH acc2, const1, acc2 ADCS t0, acc0 ADCS t1, acc1 ADC $0, acc2 // Last reduction step ADDS acc3<<32,...