Comment on A Fast 64-Bit Date Algorithm (30–40% faster by counting dates backwards)parentComments−brucehoult9moNot really. It looks like that in the C code, but in the generated machine code it'll just be a single `MULH` instruction giving (only) the upper 64 bits of the result, no shift needed.
Comments
Not really. It looks like that in the C code, but in the generated machine code it'll just be a single `MULH` instruction giving (only) the upper 64 bits of the result, no shift needed.