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Re: Generic tuning in x86-tune.def 1/2
- From: Andi Kleen <andi at firstfloor dot org>
- To: Jan Hubicka <hubicka at ucw dot cz>
- Cc: gcc-patches at gcc dot gnu dot org, hjl dot tools at gmail dot com
- Date: Fri, 27 Sep 2013 12:58:43 -0700
- Subject: Re: Generic tuning in x86-tune.def 1/2
- Authentication-results: sourceware.org; auth=none
- References: <20130927085640 dot GD21484 at kam dot mff dot cuni dot cz>
Jan Hubicka <email@example.com> writes:
> I also added X86_TUNE_SSE_UNALIGNED_STORE_OPTIMAL to bobcat tuning, since it
> seems like obvious omision (after double checking in optimization manual) and
> droped X86_TUNE_FOUR_JUMP_LIMIT for buldozer cores.
When tuning for Intel SandyBridge+ it would be actually interesting to
use a 32 byte window instead of 16 bytes.
The decoded icache has a 3 jump limit per 32byte.
So if K8 support is dropped from generic could just change it over
to 32 bytes there?
firstname.lastname@example.org -- Speaking for myself only