From: Peter Maydell <peter.maydell@linaro.org>
To: qemu-devel@nongnu.org
Subject: [Qemu-devel] [Bug 1761401] Re: ARM/Neon: vcvt rounding error
Date: Tue, 10 Apr 2018 15:50:51 -0000 [thread overview]
Message-ID: <152337545188.13510.3508781639351092805.malone@gac.canonical.com> (raw)
In-Reply-To: 152291524524.10021.7220810119975025094.malonedeb@soybean.canonical.com
Hi Christophe -- we think that commit bd49e6027cbc207c, now in master,
should have fixed this bug. Could you retry your testcase with a QEMU
build including that fix?
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https://bugs.launchpad.net/bugs/1761401
Title:
ARM/Neon: vcvt rounding error
Status in QEMU:
New
Bug description:
Hello,
While using QEMU commit 47d3b60858d90ac8a0cc3a72af7f95c96781125a
(March 28, 2018), I've noticed failures in one of the GCC ARM/Neon
tests. The test passes on hardware, and with QEMU-2.11.0, so it looks
like a recent regression.
The test builds a vector of 4 float32 with "125.9" as value, then converts them to 4 uint32_t.
The expected result is 125, but we get 126 instead.
Maybe it's just a matter of default rounding mode?
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next prev parent reply other threads:[~2018-04-10 16:01 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-05 8:00 [Qemu-devel] [Bug 1761401] [NEW] ARM/Neon: vcvt rounding error Christophe Lyon
2018-04-10 15:50 ` Peter Maydell [this message]
2018-04-12 14:46 ` [Qemu-devel] [Bug 1761401] " Christophe Lyon
2018-04-26 10:38 ` Thomas Huth
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