[Libre-soc-dev] WIP demo of deficiency of 6600-derived architecture compared to register renaming

Luke Kenneth Casson Leighton lkcl at lkcl.net
Wed Oct 28 03:47:35 GMT 2020

On 10/28/20, Jacob Lifshay <programmerjake at gmail.com> wrote:

> not really

au good :)

>   both the LDST
>> *and* all following instructions (all of them) are shadowed by the
>> LDST.
>> so whilst the AGEN (update of ldu) write cannot go ahead, OpFWDing
>> definitely can.
> notice that's exactly what happens to instruction #17.m: the load result is
> forwarded to instruction #18 on cycle 10.

ah fantastic.

sorry jacob i'm in quite a lot of pain at the moment and finding it
hard to focus.  i may miss things.


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