Quoting Eric Anholt (2018-06-07 14:26:39)
> Dylan Baker <dy...@pnwbakers.com> writes:
>
> > ---
> > meson.build | 30 ++++++++++++++++++++++++++----
> > meson_options.txt | 7 +++++++
> > 2 files changed, 33 insertions(+), 4 deletions(-)
> >
> > diff --git a/meson.build b/meson.build
> > index 0171328bcd7..f6fe141056a 100644
> > --- a/meson.build
> > +++ b/meson.build
> > @@ -601,13 +601,33 @@ if with_gallium_st_nine
> > endif
> > endif
> >
> > +if get_option('altivec') != 'false'
> > + if host_machine.cpu_family() == 'ppc64le'
> > + if cc.get_id() == 'gcc' and cc.version().version_compare('< 4.8')
> > + error('Altivec is not supported with gcc version < 4.8.')
> > + endif
> > + if cc.compiles('''
> > + #include <altivec.h>
> > + int main() {
> > + vector unsigned char r;
> > + vector unsigned int v = vec_splat_u32 (1);
> > + r = __builtin_vec_vgbbd ((vector unsigned char) v);
> > + return 0;
> > + }''',
> > + name : 'POWER8 intrinsics')
> > + pre_args += ['-D_ARCH_PWR8', '-mpower8-vector']
> > + elif get_option('altivec') == 'true'
> > + error('Altivec support required but not found.')
> > + endif
> > + endif
> > +endif
> > +
>
> The autotools build seems to do this test with -mpower8-vector in the
> cflags, and that seems like it would probably be necessary.You are correct, I've fixed that locally. > > > diff --git a/meson_options.txt b/meson_options.txt > > index 2c1f514debe..5976e14fc71 100644 > > --- a/meson_options.txt > > +++ b/meson_options.txt > > @@ -298,3 +298,10 @@ option( > > choices : ['freedreno', 'glsl', 'intel', 'nir', 'nouveau', 'all'], > > description : 'List of tools to build.', > > ) > > +option( > > + 'altivec', > > + type : 'combo', > > + value : 'auto', > > + choices : ['auto', 'true', 'false'], > > + description : 'Enable altivec optimizations if supported by host > > machine.', > > +) > > -- > > This should probably be power8 rather than altivec, since altivec > predates power8 by a long time. Also fixed locally. Dylan
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