But it's a much more compact than that glibc monstrosity is. Sure, the glibc version will win in a micro-benchmark, but micro-benchmarks don't capture the effect on the instruction cache.
Using a decimal expansion adds 25% overhead from pure maths. Your cache will be larger if you're working in base ten regardless of what optimizations your compiler does.
Using a decimal expansion adds 25% overhead from pure maths. Your cache will be larger if you're working in base ten regardless of what optimizations your compiler does.