Method zero_device_h

dnn/src/rocm/handle.h:51–51

    dt_float32* one_device() { return &m_const_scalars->f32[1]; }
#if !MEGDNN_DISABLE_FLOAT16
    __half* zero_device_h() { return &m_const_scalars->f16[0].hip_x; }
    __half* one_device_h() { return &m_const_scalars->f16[1].hip_x; }
#endif
    dt_int32* zero_device_i32() { return &m_const_scalars->i32[0]; }