[libre-riscv-dev] [Bug 267] The efficiency of adder/subtractor

[whygee at f-cpu.org]

On 2020-04-07 17:25, Jacob Lifshay wrote:
> On Tue, Apr 7, 2020, 08:14 <whygee at f-cpu.org> wrote:
>> Have a look :
>> http://www.ecs.umass.edu/ece/koren/arith/simulator/Add/lookahead/
> 
> Neat! It is, however, limited to only 2 levels of lookahead circuits, 
> which
> is only sufficient for 16 or maybe 32 bits, not for 64 or more.

It shouldn't be too hard to extend it...

> Jacob
y