Method OffsetCalc

src/library/generator.stockham.cpp:2900–2939

		}

		inline std::string OffsetCalc(const std::string &off, bool input = true, bool rc_second_index = false)
		{
			std::string str;

			const size_t *pStride = input ? params.fft_inStride : params.fft_outStride;

			std::string batch;
			if(r2c2r && !rcSimple)
			{
				batch += "(batch*"; batch += SztToStr(2*numTrans);
				if(rc_second_index) batch += " + 1";
				else				batch += " + 0";

				if(numTrans != 1)	{ batch += " + 2*(me/"; batch += SztToStr(workGroupSizePerTrans); batch += "))"; }
				else				{ batch += ")"; }
			}
			else
			{
				if(numTrans == 1)	{	batch += "batch"; }
				else				{	batch += "(batch*"; batch += SztToStr(numTrans);
										batch += " + (me/"; batch += SztToStr(workGroupSizePerTrans); batch += "))"; }
			}

			str += "\t"; str += off; str += " = ";
			std::string nextBatch = batch;
			for(size_t i=(params.fft_DataDim - 1); i>1; i--)
			{
				size_t currentLength = 1;
				for(int j=1; j<i; j++) currentLength *= params.fft_N[j];

				str += "("; str += nextBatch; str += "/"; str += SztToStr(currentLength);
				str += ")*"; str += SztToStr(pStride[i]); str += " + ";

				nextBatch = "(" + nextBatch + "%" + SztToStr(currentLength) + ")";
			}

			str += nextBatch; str += "*"; str += SztToStr(pStride[1]); str += ";\n";

			return str;
		}

    public:
        Kernel( const FFTKernelGenKeyParams &paramsVal) :