The emergence of diverse wireless standards, employed in various transmission environments, is leading towards evolution of flexible radio platforms. In this letter we are presenting the first universal ASIP-based flexible and scalable demapper. The presented architecture provides the flexibility ranging from low complexity QPSK Gray mapped constellations to a high complexity 256-QAM rotated constellations in turbo demodulation framework. The proposed architecture provides the liberty to use this demapper both in iterative and non-iterative receivers. Synthesis results demonstrate that the throughput of the ASIP reach up to 606 Mega LLRS per second for 16-QAM Gray mapped constellation.