High level languages for GPUs

Abstract

• HLSL and Cg are syntactically almost identical • Exception: Cg 1.3 allows shader “interfaces”, unsized arrays • Command line compilers • Microsoft’s FXC.exe • Compiles to DirectX vertex and pixel shader assembly only • fxc /Tps_2_0 myshader.hlsl • NVIDIA’s CGC.exe • Compiles to everything • cgc -profile ps_2_0 myshader.cg • Can generate very different assembly! • Driver will recompile code • Compliance may vary