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In my experience, it's true. And it's unlikely to change - the simulation code was largely written in FORTRAN and C over a period of 50 years.

This is in fact what makes Intel Phi so appealing to some.




For C/Fortran using LAPACK it should be as simple as relinking. https://www.olcf.ornl.gov/tutorials/gpu-accelerated-librarie...


12 years ago I worked on High Level Synthesis at Xilinx converting atmospheric moisture simulations from FORTRAN...




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