Reassembles a (hi, lo) double-double pair back into a Float64Array — the inverse of splitDoubleDouble, used after reading a double-double GPU readback (GpuVector, GpuMatrix, dasum) back to the CPU.
Reassembles a (hi, lo) double-double pair back into a Float64Array — the inverse of splitDoubleDouble, used after reading a double-double GPU readback (GpuVector, GpuMatrix, dasum) back to the CPU.