Re: [PATCH] Use 128-bit math to accelerate numeric division, when 8 < divisor digits <= 16

On Mon, 23 Jan 2023 at 05:06, John Naylor <john.naylor@enterprisedb.com> wrote:
>
> According to Agner's instruction tables [1], integer division on Skylake (for example) has a latency of 26 cycles for
32-bitoperands, and 42-95 cycles for 64-bit.
 
>
> [1] https://www.agner.org/optimize/instruction_tables.pdf
>

Thanks, that's a very useful reference.

(And I do indeed have one of those CPUs, which explains what I was seeing.)

Regards,
Dean