From mboxrd@z Thu Jan  1 00:00:00 1970
Date: Wed, 14 Dec 2011 18:59:45 -0800
From: Anthony Martin <ality@pbrane.org>
To: Charles Forsyth <charles.forsyth@gmail.com>
Message-ID: <20111215025945.GA16477@dinah>
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Cc: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
Subject: Re: [9fans] C compiler error?
Topicbox-Message-UUID: 4f1f60ba-ead7-11e9-9d60-3106f5b1d025

Charles Forsyth <charles.forsyth@gmail.com> once said:
> that's a little tidier, but still not right. the original
> pswt.c code was fine (or nearly so). the problem is
> actually in 8c's handling of 64-bit values and registers.

I'm not sure I understand entirely.  Could you
elaborate this a bit?  Also I'm a bit confused
about how uvlongs are handled in 8c.  Regalloc
seems to use D_F0 for signed vlongs which works
fine with the AFMOVV instructions but IIRC that
only works for signed 64-bit values.  To use an
unsigned value there would have to be some sort
of pre- and post-processing before a load or
store into the FP register.  I don't see code
for that anywhere.  Did I miss it?

Any help is appreciated.

Thanks,
  Anthony