Toggle some cubic 3D_BLOCK_RC
Toggle some cubic 3D_BLOCK_RC

Make 3D_BLOCK_RC do XY-plane first. On cubic-50 &  200 for now
ROCmSoftwarePlatform/rocFFT,ROCmSoftwarePlatform/rocFFT,ROCmSoftwarePlatform/rocFFT,ROCmSoftwarePlatform/rocFFT