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Re: [Qemu-trivial] [Qemu-devel] [PATCH] tests: Fix 'make test' for i686

From: Peter Maydell
Subject: Re: [Qemu-trivial] [Qemu-devel] [PATCH] tests: Fix 'make test' for i686 hosts (buildregression))
Date: Fri, 7 Mar 2014 13:35:12 +0000

On 7 March 2014 13:19, Stefan Weil <address@hidden> wrote:
> test-i386 does some calculations and prints the results (see source code
> tests/tcg/test-i386.c). If the user mode emulation of QEMU works, it
> should not matter whether that executable runs native or emulated and
> both outputs be identical. They aren't - that's why I think we have a
> TCG problem to solve.

I think TCG x86 FPU emulation has been a bit dodgy since
forever; it's a fair amount of work to go through and
fix everything up to be bitwise exact results versus
hardware and I think that nobody's cared enough about x86
emulation to do that...

-- PMM

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