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Re: [Qemu-ppc] [Qemu-devel] [PATCH] ppc: Three floating point fixes

From: Peter Maydell
Subject: Re: [Qemu-ppc] [Qemu-devel] [PATCH] ppc: Three floating point fixes
Date: Tue, 20 Aug 2019 11:35:29 +0100

On Tue, 20 Aug 2019 at 08:36, David Gibson <address@hidden> wrote:
> On Mon, Aug 19, 2019 at 12:13:34PM -0500, Paul Clarke wrote:
> > These issues were found while running Glibc's test suite for "math",
> > and there are still a *LOT* of QEMU-only FAILs, so I may be back
> > again with suggested fixes or questions.  :-)
> That doesn't greatly surprise me, TCG's ppc target stuff is only so-so
> tested, TBH.

You might also consider using/extending the risu test cases for
ppc64 -- individual checks of each insn against a known-good
implementation can be easier to track down bugs than trying
to figure out why a higher-level test suite like the glibc one
has reported a failure, IME. (There are already risu patterns
for XSCVDPSP and XSCVDPSPN, so I think that bug at least ought
to be found by risu if you run it against the right h/w as
known-good reference...)

-- PMM

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