From: "Frank Ch. Eigler" <fche@redhat.com>
To: matthew green <mrg@cygnus.com>
Cc: cgen@sources.redhat.com
Subject: Re: generalizing the delay rtx function
Date: Wed, 14 Mar 2001 05:05:00 -0000 [thread overview]
Message-ID: <20010314080539.K32628@redhat.com> (raw)
In-Reply-To: <20859.984555605@cygnus.com>
Hi -
On Wed, Mar 14, 2001 at 06:40:05PM +1100, matthew green wrote:
: [...]
: is this possible? eg, (sparc) if i do:
:
: ba foo
: ld [%l1 + 4], %o0
: vs.
: ba foo
: tst %o0
:
: the load can take *much* longer than the tst?
I'm not sure I guess correctly at your point; is it that
these two code sequences require a different number of
clock cycles to run on a SPARC chip? If so, yes, but
the delay is not a programmer-visible one, so the
proposed extensions to the delay rtx would not be used
to model it.
- FChE
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next prev parent reply other threads:[~2001-03-14 5:05 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-03-08 13:01 Frank Ch. Eigler
2001-03-12 20:04 ` Ben Elliston
2001-03-12 20:33 ` Doug Evans
2001-03-13 23:40 ` matthew green
2001-03-14 5:05 ` Frank Ch. Eigler [this message]
2001-03-14 16:43 ` matthew green
2001-03-14 16:55 ` Frank Ch. Eigler
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