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Re: [Qemu-arm] [PATCH v2 2/3] fpu/softfloat: support ARM Alternative hal
From: |
Alex Bennée |
Subject: |
Re: [Qemu-arm] [PATCH v2 2/3] fpu/softfloat: support ARM Alternative half-precision |
Date: |
Fri, 04 May 2018 13:26:09 +0100 |
User-agent: |
mu4e 1.1.0; emacs 26.1 |
Richard Henderson <address@hidden> writes:
> On 05/03/2018 11:17 AM, Peter Maydell wrote:
>> (target/i386 notably does not do this, we should check how
>> SSE and x87 handle NaNs in fp conversions first.)
>
> Hardware does silence NaNs. I tested that earlier:
>
> https://lists.gnu.org/archive/html/qemu-devel/2018-04/msg03114.html
Does that include SSE? I know the hardware will silence NaN's if the
value is ever pushed into an x87 register (as GCC will do when
spilling/filling float).
>
>
> r~
--
Alex Bennée
[Qemu-arm] [PATCH v2 3/3] tests/tcg/aarch64: add fcvt test cases for AArch64 (!UPSTREAM), Alex Bennée, 2018/05/02
Re: [Qemu-arm] [PATCH v2 0/3] refactor float-to-float conversions and fix AHP, Richard Henderson, 2018/05/02
Re: [Qemu-arm] [Qemu-devel] [PATCH v2 0/3] refactor float-to-float conversions and fix AHP, no-reply, 2018/05/02