Date: Mon, 14 Jun 2021 13:38:15 -0700 From: Mark Millard via freebsd-current <freebsd-current@freebsd.org> To: Dimitry Andric <dim@FreeBSD.org> Cc: freebsd-current <freebsd-current@freebsd.org> Subject: Re: git: 790a6be5a169 - main - Export various 128 bit long double functions from libgcc_s.so.1 Message-ID: <38C7A31A-CB21-4C3C-98D0-38F91EBC35D3@yahoo.com> References: <38C7A31A-CB21-4C3C-98D0-38F91EBC35D3.ref@yahoo.com>
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Dimitry Andric dim at FreeBSD.org wrote on Mon Jun 14 19:17:40 UTC 2021 : > The branch main has been updated by dim: >=20 > URL:=20 > = https://cgit.FreeBSD.org/src/commit/?id=3D790a6be5a1699291c6da87871426d0c5= 6dedcc89 >=20 >=20 > commit 790a6be5a1699291c6da87871426d0c56dedcc89 > Author: Dimitry Andric <dim at FreeBSD.org> > AuthorDate: 2021-06-14 19:17:05 +0000 > Commit: Dimitry Andric <dim at FreeBSD.org> > CommitDate: 2021-06-14 19:17:05 +0000 >=20 > Export various 128 bit long double functions from libgcc_s.so.1 > =20 > These were already compiled for some time on aarch64 and riscv, by > including lib/libcompiler_rt/Makefile.inc, but never exported in = the > shared library. Since gcc exports these under version GCC_4.6.0, = we do > the same. > =20 > This review should replace D11482 for now. For e.g. amd64 more = work is > still to be done, as compiler-rt does not seem to support 128 bit = long > double math for that architecture. =20 Given that "man arch" explicitly reports: Architecture void * long double time_t . . . amd64 8 16 8 . . . and also: Architecture float, double long double . . . amd64 hard hard, 80 bit . . . (so there is guaranteed pad involved), would amd64 having 128 bit long doubles (no pad by default?) be an FreeBSD ABI change, possibly needing a discussion on freebsd-arch and freebsd-numerics ? (Or may be it happened and I just do not remember. Or may be it would take special enabling of the alternate ABI's use and not be a default configuration.) (i386 only has "12", not "16", for its "80 bit", so 96 bits: less pad.) =3D=3D=3D Mark Millard marklmi at yahoo.com ( dsl-only.net went away in early 2018-Mar)
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