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Re: [ColdFire 9/63] Add -mcpu, -march, -mtune, and related options
- From: "Joseph S. Myers" <joseph at codesourcery dot com>
- To: Richard Sandiford <richard at codesourcery dot com>
- Cc: Roman Zippel <zippel at linux-m68k dot org>, gcc-patches at gcc dot gnu dot org, nathan at codesourcery dot com
- Date: Thu, 19 Apr 2007 11:51:41 +0000 (UTC)
- Subject: Re: [ColdFire 9/63] Add -mcpu, -march, -mtune, and related options
- References: <874pqzw4w1.fsf@firetop.home> <87zm8ruq9h.fsf@firetop.home> <87vejfuq79.fsf_-_@firetop.home> <87r6u3uq5h.fsf_-_@firetop.home> <87mz4ruq2f.fsf_-_@firetop.home> <87ejq3upwm.fsf_-_@firetop.home> <87ac0rupmr.fsf_-_@firetop.home> <8764bfupk9.fsf_-_@firetop.home> <871wm3up7m.fsf_-_@firetop.home> <Pine.LNX.4.64.0704120218420.26384@scrub.home> <87irbt21h5.fsf@firetop.home> <Pine.LNX.4.64.0704181839000.14457@scrub.home> <877is84zuj.fsf@firetop.home>
On Thu, 19 Apr 2007, Richard Sandiford wrote:
> We only have single-processor -mtune settings on MIPS, and I've never
> seen any complaints about that. Trying to support -mtune settings for a
> range of processors, making decisions that offset one against the other,
> sounds far too complicated in general. I realise that's what 68020-40
> and 68020-60 do, but that's thankfully a small set. (And it sounds like
> there's doubt about what even those two combined tuning settings should
> mean.)
Tuning for a range is also what -mtune=generic does for x86, though x86
may be rather a special case in terms of people wishing to build software
once that runs on a wide range of systems.
--
Joseph S. Myers
joseph@codesourcery.com
- References:
- Re: [ColdFire 9/63] Add -mcpu, -march, -mtune, and related options
- Re: [ColdFire 9/63] Add -mcpu, -march, -mtune, and related options
- Re: [ColdFire 9/63] Add -mcpu, -march, -mtune, and related options
- Re: [ColdFire 9/63] Add -mcpu, -march, -mtune, and related options