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Re: ia64 fr register reunification

To: Jim Wilson <wilson at cygnus dot com>
Subject: Re: ia64 fr register reunification
From: Richard Henderson <rth at cygnus dot com>
Date: Tue, 13 Jun 2000 17:31:55 -0700
Cc: gcc-patches at gcc dot gnu dot org
References: <20000613162042.A6970@cygnus.com> <200006131712.KAA11904@wilson.cygnus.com>

On Tue, Jun 13, 2000 at 10:12:58AM -0700, Jim Wilson wrote:
> The .acq and .rel completers are not valid for loads/stores involving FP
> registers.  This means that we can't implement correct volatile semantics
> as per the ABI if we allow direct loads/stores of volatile integer values
> to/from FP registers.

Ack.  I forgot about this.

Seems like the easiest solution is to define an EXTRA_CONSTRAINTS
letter that matches a non-volatile memory.


r~

References:
- ia64 fr register reunification
  - From: Richard Henderson
- Re: ia64 fr register reunification
  - From: Jim Wilson

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