DFA "pipeline" description for mcore
Jeffrey A Law
law@redhat.com
Mon Jul 5 23:24:00 GMT 2004
On Sat, 2004-07-03 at 09:27, Steven Bosscher wrote:
> Hi,
>
> There's really no "pipeline model" here, only a load latency of
> 2 cycles instead of 1 is modelled. But in the DFA model, an insn
> that doesn't match a define_insn_reservation has latency 0, hence
> the extra lines.
>
> Tested by building an amd64 x mcore cross and comparing assembly.
> OK?
>
> Gr.
> Steven
>
> * config/mcore/mcore.c (TARGET_SCHED_USE_DFA_PIPELINE_INTERFACE):
> Define.
> * config/mcore/mcore.md: Model memory latency with a simple DFA
> pipeline description instead of a define_function_unit.
This is fine.
jeff
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