From: David Gibson <david@gibson.dropbear.id.au>
To: Laurent Vivier <lvivier@redhat.com>
Cc: qemu-ppc@nongnu.org, "Paul A. Clarke" <pc@us.ibm.com>,
qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [Qemu-ppc] [PATCH] ppc: Fix xsmaddmdp and friends
Date: Thu, 29 Aug 2019 09:28:58 +1000 [thread overview]
Message-ID: <20190828232858.GA16342@umbus.fritz.box> (raw)
In-Reply-To: <896ff2fb-a1b5-c22b-e195-a5054fb8d354@redhat.com>
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On Wed, Aug 28, 2019 at 07:32:38PM +0200, Laurent Vivier wrote:
> On 22/08/2019 00:56, David Gibson wrote:
> > On Wed, Aug 21, 2019 at 10:28:41AM -0500, Paul A. Clarke wrote:
> >> From: "Paul A. Clarke" <pc@us.ibm.com>
> >>
> >> A class of instructions of the form:
> >> op Target,A,B
> >> which operate like:
> >> Target = Target * A + B
> >> have a bit set which distinguishes them from instructions that operate as:
> >> Target = Target * B + A
> >>
> >> This bit is not being checked properly (using PPC_BIT macro), so all
> >> instructions in this class are operating incorrectly as the second form
> >> above. The bit was being checked as if it were part of a 64-bit
> >> instruction opcode, rather than a proper 32-bit opcode. Fix by using the
> >> macro (PPC_BIT32) which treats the opcode as a 32-bit quantity.
> >>
> >> Signed-off-by: Paul A. Clarke <pc@us.ibm.com>
> >
> > Applied to ppc-for-4.2, thanks.
>
> David,
>
> could you add:
>
> Fixes: c9f4e4d8b632 ("target/ppc: improve VSX_FMADD with new GEN_VSX_HELPER_VSX_MADD macro")
>
> Reviewed-by: Laurent Vivier <lvivier@redhat.com>
> Tested-by: Laurent Vivier <lvivier@redhat.com>
Done, thanks.
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
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prev parent reply other threads:[~2019-08-28 23:56 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-21 15:28 [Qemu-devel] [PATCH] ppc: Fix xsmaddmdp and friends Paul A. Clarke
2019-08-21 22:56 ` David Gibson
2019-08-28 17:32 ` [Qemu-devel] [Qemu-ppc] " Laurent Vivier
2019-08-28 23:28 ` David Gibson [this message]
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