Small optimizations to the LUT lookup on HVX.
Small optimizations to the LUT lookup on HVX.


Former-commit-id: 00cc8ef2799c0431a395497235604c009b314e12
Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,Trass3r/Halide,Trass3r/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide,Trass3r/Halide