From: "Alex Bennée" <alex.bennee@linaro.org>
To: "Emilio G. Cota" <cota@braap.org>
Cc: Richard Henderson <richard.henderson@linaro.org>,
qemu-devel@nongnu.org, peter.maydell@linaro.org
Subject: Re: [Qemu-devel] [PULL 16/20] target/arm: Use vector infrastructure for aa64 compares
Date: Wed, 04 Apr 2018 19:24:52 +0100 [thread overview]
Message-ID: <878ta2de2z.fsf@linaro.org> (raw)
In-Reply-To: <20180404164908.GA7582@flamenco>
Emilio G. Cota <cota@braap.org> writes:
> On Wed, Feb 07, 2018 at 14:55:36 -0800, Richard Henderson wrote:
>> Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
>> Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
>> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
>
> Just bisected a segfault for aarch64 nbench on a PowerPC host
> to this commit (79d61de6bdc398). I've also tested on x86_64 and
> aarch64 hosts, and these do not seem to be affected.
I wonder about other hosts without TCG_vec backend support (powerpc is
one)? I suspect it must be the fall-back for the vector expanders is
wrong.
>
> To reproduce:
> 1. grab this binary:
> http://cs.columbia.edu/~cota/qemu/nbench-aarch64
> 2. run it on a PowerPC host with:
> $ aarch64-linux-user/qemu-aarch64 nbench-aarch64 -V
>
> Note: the "-V" (or "-v") flag is important! Without it, there's no segfault.
>
> I can reproduce this consistently on a Power8 host -- I'm using gcc112
> from the gcc compile farm.
>
> Thanks,
>
> Emilio
--
Alex Bennée
next prev parent reply other threads:[~2018-04-04 18:24 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-07 22:55 [Qemu-devel] [PULL 00/20] tcg: generic vector operaions Richard Henderson
2018-02-07 22:55 ` [Qemu-devel] [PULL 01/20] tcg: Allow multiple word entries into the constant pool Richard Henderson
2018-02-07 22:55 ` [Qemu-devel] [PULL 02/20] tcg: Add types and basic operations for host vectors Richard Henderson
2018-02-07 22:55 ` [Qemu-devel] [PULL 03/20] tcg: Standardize integral arguments to expanders Richard Henderson
2018-02-07 22:55 ` [Qemu-devel] [PULL 04/20] tcg: Add generic vector expanders Richard Henderson
2018-02-07 22:55 ` [Qemu-devel] [PULL 05/20] tcg: Add generic vector ops for constant shifts Richard Henderson
2018-02-07 22:55 ` [Qemu-devel] [PULL 06/20] tcg: Add generic vector ops for comparisons Richard Henderson
2018-02-07 22:55 ` [Qemu-devel] [PULL 07/20] tcg: Add generic vector ops for multiplication Richard Henderson
2018-02-07 22:55 ` [Qemu-devel] [PULL 08/20] tcg: Add generic helpers for saturating arithmetic Richard Henderson
2018-02-07 22:55 ` [Qemu-devel] [PULL 09/20] tcg: Add generic vector helpers with a scalar operand Richard Henderson
2018-02-07 22:55 ` [Qemu-devel] [PULL 10/20] tcg/optimize: Handle vector opcodes during optimize Richard Henderson
2018-02-07 22:55 ` [Qemu-devel] [PULL 11/20] target/arm: Align vector registers Richard Henderson
2018-02-07 22:55 ` [Qemu-devel] [PULL 12/20] target/arm: Use vector infrastructure for aa64 add/sub/logic Richard Henderson
2018-02-07 22:55 ` [Qemu-devel] [PULL 13/20] target/arm: Use vector infrastructure for aa64 mov/not/neg Richard Henderson
2018-02-07 22:55 ` [Qemu-devel] [PULL 14/20] target/arm: Use vector infrastructure for aa64 dup/movi Richard Henderson
2018-02-07 22:55 ` [Qemu-devel] [PULL 15/20] target/arm: Use vector infrastructure for aa64 constant shifts Richard Henderson
2018-02-07 22:55 ` [Qemu-devel] [PULL 16/20] target/arm: Use vector infrastructure for aa64 compares Richard Henderson
2018-04-04 16:49 ` Emilio G. Cota
2018-04-04 18:24 ` Alex Bennée [this message]
2018-04-04 21:39 ` Emilio G. Cota
2018-04-05 0:07 ` Richard Henderson
2018-04-05 0:54 ` Richard Henderson
2018-04-05 4:45 ` Emilio G. Cota
2018-04-05 5:06 ` Thomas Huth
2018-04-06 0:56 ` Richard Henderson
2018-02-07 22:55 ` [Qemu-devel] [PULL 17/20] target/arm: Use vector infrastructure for aa64 multiplies Richard Henderson
2018-02-07 22:55 ` [Qemu-devel] [PULL 18/20] target/arm: Use vector infrastructure for aa64 orr/bic immediate Richard Henderson
2018-02-07 22:55 ` [Qemu-devel] [PULL 19/20] tcg/i386: Add vector operations Richard Henderson
2018-02-20 16:44 ` Max Reitz
2018-02-21 20:22 ` Richard Henderson
2018-02-22 13:54 ` Max Reitz
2018-02-07 22:55 ` [Qemu-devel] [PULL 20/20] tcg/aarch64: " Richard Henderson
2018-02-07 23:22 ` [Qemu-devel] [PULL 00/20] tcg: generic vector operaions no-reply
2018-02-08 14:26 ` Peter Maydell
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