Gentoo Archives: gentoo-dev

From: "Michał Górny" <mgorny@g.o>
To: gentoo-dev@l.g.o
Cc: arm <arm@g.o>
Subject: Re: [gentoo-dev] Need ARM/AArch64 test data for cpuid2cpuflags
Date: Wed, 11 Sep 2019 18:15:44
Message-Id: 4fe3fcbe0c411a3aa1bfd23336cc42cc8726b0d2.camel@gentoo.org
In Reply to: Re: [gentoo-dev] Need ARM/AArch64 test data for cpuid2cpuflags by Matt Turner
On Wed, 2019-09-11 at 11:02 -0700, Matt Turner wrote:
> From my original generation SolidRun Cubox: > > $ ./hwcap-dump > hwcap:000000000004ead6 > hwcap2:0000000000000000 > mattst88@cubox ~/cpuid2cpuflags-7-dev $ uname -a > Linux cubox 5.2.7 #11 Wed Aug 7 17:50:03 PDT 2019 armv7l ARMv7 > Processor rev 5 (v7l) Marvell Dove GNU/Linux > > cpuid2cflags says > CPU_FLAGS_ARM: edsp iwmmxt thumb vfp vfpv3 v4 v5 v6 v7 thumb2 > > /proc/cpuinfo: > > processor : 0 > model name : ARMv7 Processor rev 5 (v7l) > BogoMIPS : 333.33 > Features : half thumb fastmult vfp edsp iwmmxt thumbee vfpv3 > vfpv3d16 tls idivt > CPU implementer : 0x56 > CPU architecture: 7 > CPU variant : 0x0 > CPU part : 0x581 > CPU revision : 5 > > Hardware : Marvell Dove > Revision : 0000 > Serial : 0000000000000000
Thanks.
> > I've got an "iwmmxt2" flag on x11-libs/pixman, but I don't think > there's a hwcap bit for it. At least not that I see in > arch/arm/include/uapi/asm/hwcap.h
Maybe there's some other way of inferring it. For example, 'thumb2' we're basing on ARM version.
> > That's just as well. It's only a very small optimization over iwmmxt. >
-- Best regards, Michał Górny

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