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

Jacob Lifshay programmerjake at gmail.com
Tue Apr 7 16:25:45 BST 2020

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.


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