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From: Andreas Schwab <schwab@linux-m68k.org>
References: <20170207005930.28327-1-laurent@vivier.eu>
	<20170207005930.28327-16-laurent@vivier.eu>
	<ca2f9cdf-c18c-bc8a-05a7-05b1d9748a48@twiddle.net>
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	<93272090-e43c-d877-bd2b-49bc19d7175b@twiddle.net>
Date: Fri, 17 Feb 2017 10:06:20 +0100
In-Reply-To: <93272090-e43c-d877-bd2b-49bc19d7175b@twiddle.net> (Richard
	Henderson's message of "Fri, 17 Feb 2017 08:01:10 +1100")
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Subject: Re: [Qemu-devel] [PATCH v3 15/16] target-m68k: add more FPU
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To: Richard Henderson <rth@twiddle.net>
Cc: Laurent Vivier <laurent@vivier.eu>, qemu-devel@nongnu.org, Aurelien Jarno <aurelien@aurel32.net>

On Feb 17 2017, Richard Henderson <rth@twiddle.net> wrote:

> On 02/16/2017 09:18 PM, Andreas Schwab wrote:
>> There is no guarantee that the host long double has the same range and
>> precision as floatx80.
>
> Indeed not.  However, do you have another plan for implementing the
> trancendentals?  I'm quite happy using the host long double libm as an
> estimate.  Which is better than at least BasiliskII, which uses the host
> double.

In ARAnyM, I implemented a software emulation using mpfr (but it is
still incomplete in many ways).  I don't know if something like this
would be an option for qemu.

Andreas.

-- 
Andreas Schwab, schwab@linux-m68k.org
GPG Key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
"And now for something completely different."