3 ms·
That "something else" is already crowded out by running through a multi-megabyte image. At least the instruction cache is barely affected, which would not be t
by burfog 8y ago
That "something else" is already crowded out by running through a multi-megabyte image.
At least the instruction cache is barely affected, which would not be the case for a math library function.
- AstralStorm 8y agoYou're not running a multi MB image but a small block thereof. Not that 5-6KiB LUT matters, but the extra conditional multiply ops or power or logarithm function evaluations do. Latter are need a few MACs for a good approximation (at least 12 bit precise, preferably 16 bit - like 5th order polynomial), former have masks, worse for SIMD.