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[committed, PATCH] x86: Don't disable SSE4a when disabling SSE4

H.J. Lu hjl.tools@gmail.com
Sun Feb 16 16:48:00 GMT 2020 
On Wed, Feb 12, 2020 at 9:18 AM H.J. Lu <hjl.tools@gmail.com> wrote:
>
> On Wed, Feb 12, 2020 at 9:08 AM Jan Beulich <jbeulich@suse.com> wrote:
> >
> > Since ".arch sse4a" enables SSE3 and earlier, disabling SSE3 should also
> > disable SSE4a. And as per its name, ".arch .nosse4" should also do so.
> >
> > gas/
> > 2020-02-XX  Jan Beulich  <jbeulich@suse.com>
> >
> >         * config/tc-i386.c (cpu_noarch): Use CPU_ANY_SSE4_FLAGS in
> >         "nosse4" entry.
> >
> > opcodes/
> > 2020-02-XX  Jan Beulich  <jbeulich@suse.com>
> >
> >         * i386-gen.c (cpu_flag_init): Move CpuSSE4a from
> >         CPU_ANY_SSE_FLAGS entry to CPU_ANY_SSE3_FLAGS one. Add
> >         CPU_ANY_SSE4_FLAGS entry.
> >         * i386-init.h: Re-generate.
> >
>
> OK.
>
> Thanks.

commit 7deea9aad8 changed nosse4 to include CpuSSE4a.  But AMD SSE4a is
a superset of SSE3 and Intel SSE4 is a superset of SSSE3.  Disable Intel
SSE4 shouldn't disable AMD SSE4a.  This patch restores nosse4.  It also
adds .sse4a and nosse4a.

-- 
H.J.
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