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Re: [Qemu-devel] [PATCH] target-sh4: get rid of CPU_{Float, Double}U

From: Richard Henderson
Subject: Re: [Qemu-devel] [PATCH] target-sh4: get rid of CPU_{Float, Double}U
Date: Mon, 11 Apr 2011 08:32:26 -0700
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv: Gecko/20110307 Fedora/3.1.9-0.39.b3pre.fc14 Thunderbird/3.1.9

On 04/11/2011 08:30 AM, Peter Maydell wrote:
> On 11 April 2011 16:19, Richard Henderson <address@hidden> 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.


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