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Date: Mon, 11 Apr 2011 08:32:26 -0700
From: Richard Henderson <rth@twiddle.net>
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Subject: Re: [Qemu-devel] [PATCH] target-sh4: get rid of CPU_{Float, Double}U
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To: Peter Maydell <peter.maydell@linaro.org>
Cc: Aurelien Jarno <aurelien@aurel32.net>, qemu-devel@nongnu.org, Nathan Froyd <froydnj@codesourcery.com>

On 04/11/2011 08:30 AM, Peter Maydell wrote:
> On 11 April 2011 16:19, Richard Henderson <rth@twiddle.net> wrote:
>> On 04/11/2011 08:09 AM, Peter Maydell wrote:
>>> (4) I think you should be able to write a helper function for an
>>> add as just
>>>  float32 HELPER(my_float_add)(float32 a, float32 b) {
>>>      return float32_add(a, b, status);
>>>  }
>>
>> While this is a laudable goal, this will fail for hosts that pass
>> all structures by reference.  This is true of, e.g. PPC32.
> 
> ...but only if float32 is a struct, which is where we came in.
> In the sane default configuration float32 is just a uint32_t
> in disguise.

Well, that's all right then.  So long as we restrict ourselves
to passing around (typedefed) integers and pointers only, we'll
be ok.


r~