Date: Mon, 19 Oct 2015 02:12:27 -0400 From: Rich Felker <dalias@...c.org> To: musl@...ts.openwall.com Subject: Re: status of armhf asm with VFP instructions On Fri, Oct 16, 2015 at 01:58:09AM +0200, Szabolcs Nagy wrote: > * Szabolcs Nagy <nsz@...t70.net> [2015-10-16 01:16:07 +0200]: > > * Rich Felker <dalias@...c.org> [2015-10-15 18:44:25 -0400]: > > > It seems we're already using the new forms vsqrt and vabs in > > > src/math/armhf/*.s. So using vmrs/vmsr presumably will not break > > > support for any toolchains that work now. > > > > > > > vmrs/vmsr can break on old binutils versions (2.18 - 2.20) and > > 2.20 is not that ancient.. is that ok? > > > > attached the old armhf patch with updated commit message. > >From 542d4003a60320ac0446b156681c59cbc19dd6a1 Mon Sep 17 00:00:00 2001 > From: Szabolcs Nagy <nsz@...t70.net> > Date: Tue, 21 Jul 2015 20:00:03 +0000 > Subject: [PATCH] fix armhf asm to use .fpu vfp and UAL mnemonics > > (1) Some armhf gcc toolchains (built with --with-float=hard but without > --with-fpu=vfp*) do not pass -mfpu=vfp to the assembler and then binutils > rejects the UAL mnemonics for VFP unless there is an .fpu vfp directive > in the asm source. I've committed just this part 1 since it's independent of the other changes and should yield nothing but an improvement in compatibility. I'd still like to go ahead with all the UAL changes after release. Rich
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