Does anyone know if Intel or any other vendor is contemplating creating GPU hardware that supports binary128?
There is an interesting article published by IEEE.org describing a university research project that creates basically what I am looking for. It is titled "High Performance High-Precision Floating-Point Operations on FPGAs using OpenCL".
OpenCL does not currently support binary128, but the Intel FPGA SDK for OpenCL provides support enabling one to call a custom module from an OpenCL kernel. This enabled the researchers to access their custom binary128 hardware from inside OpenCL kernels.