Re: [gentoo-dev] [PATCH 1/2] profiles/desc: descriptions for CPU_FLAGS_PPC use_expand
On 8/30/19 11:29 PM, Michał Górny wrote: > On Sat, 2019-08-31 at 00:19 -0700, Georgy Yakovlev wrote: >> On 8/30/19 11:11 PM, Michał Górny wrote: >>> On Sat, 2019-08-31 at 00:03 -0700, Georgy Yakovlev wrote: >> +altivec - Use the AltiVec instruction set +vsx - Use the Vector Scalar Extension instruction set (POWER7 and later) +vsx3 - Use the Vector Scalar Extension v.3 instruction set (POWER9 and later) >>> >>> Do all those flags have real use cases in ::gentoo? I'd really prefer >>> not having more 'unused flag' warnings ;-). >>> >> >> yeah, I have mentioned possible users above and there are plenty I >> haven't identified yet. patches to ebuilds will follow, I promise =) >> >> for example x264 if built with proper flags gives a noticeable boost, >> (at least 2x at encoding), totally worth it. >> >> ppc will not have a lot of flags like on arm or x86, maybe a couple >> more, but that's it for now. >> > > Just to be clear: we're not talking about -m compiler flags, are we? > 'cause those should be handled via CFLAGS. > of course not just compiler flags, that's clear. for example libpng has --enable-powerpc-vsx ./configure flag, and build system will do it's black magic with intrinsics if it's passed. signature.asc Description: OpenPGP digital signature
Re: [gentoo-dev] [PATCH 1/2] profiles/desc: descriptions for CPU_FLAGS_PPC use_expand
On Sat, 2019-08-31 at 00:19 -0700, Georgy Yakovlev wrote: > On 8/30/19 11:11 PM, Michał Górny wrote: > > On Sat, 2019-08-31 at 00:03 -0700, Georgy Yakovlev wrote: > > > > +altivec - Use the AltiVec instruction set > > > +vsx - Use the Vector Scalar Extension instruction set (POWER7 and later) > > > +vsx3 - Use the Vector Scalar Extension v.3 instruction set (POWER9 and > > > later) > > > > Do all those flags have real use cases in ::gentoo? I'd really prefer > > not having more 'unused flag' warnings ;-). > > > > yeah, I have mentioned possible users above and there are plenty I > haven't identified yet. patches to ebuilds will follow, I promise =) > > for example x264 if built with proper flags gives a noticeable boost, > (at least 2x at encoding), totally worth it. > > ppc will not have a lot of flags like on arm or x86, maybe a couple > more, but that's it for now. > Just to be clear: we're not talking about -m compiler flags, are we? 'cause those should be handled via CFLAGS. -- Best regards, Michał Górny signature.asc Description: This is a digitally signed message part
Re: [gentoo-dev] [PATCH 1/2] profiles/desc: descriptions for CPU_FLAGS_PPC use_expand
On 8/30/19 11:11 PM, Michał Górny wrote: > On Sat, 2019-08-31 at 00:03 -0700, Georgy Yakovlev wrote: >> +altivec - Use the AltiVec instruction set >> +vsx - Use the Vector Scalar Extension instruction set (POWER7 and later) >> +vsx3 - Use the Vector Scalar Extension v.3 instruction set (POWER9 and >> later) > > Do all those flags have real use cases in ::gentoo? I'd really prefer > not having more 'unused flag' warnings ;-). > yeah, I have mentioned possible users above and there are plenty I haven't identified yet. patches to ebuilds will follow, I promise =) for example x264 if built with proper flags gives a noticeable boost, (at least 2x at encoding), totally worth it. ppc will not have a lot of flags like on arm or x86, maybe a couple more, but that's it for now. signature.asc Description: OpenPGP digital signature
Re: [gentoo-dev] [PATCH 1/2] profiles/desc: descriptions for CPU_FLAGS_PPC use_expand
On Sat, 2019-08-31 at 00:03 -0700, Georgy Yakovlev wrote: > Signed-off-by: Georgy Yakovlev > --- > profiles/desc/cpu_flags_ppc.desc | 6 ++ > 1 file changed, 6 insertions(+) > create mode 100644 profiles/desc/cpu_flags_ppc.desc > > diff --git a/profiles/desc/cpu_flags_ppc.desc > b/profiles/desc/cpu_flags_ppc.desc > new file mode 100644 > index 000..abd2434c4f5 > --- /dev/null > +++ b/profiles/desc/cpu_flags_ppc.desc > @@ -0,0 +1,6 @@ > +# Copyright 2019 Gentoo Authors > +# Distributed under the terms of the GNU General Public License v2 > + > +altivec - Use the AltiVec instruction set > +vsx - Use the Vector Scalar Extension instruction set (POWER7 and later) > +vsx3 - Use the Vector Scalar Extension v.3 instruction set (POWER9 and later) Do all those flags have real use cases in ::gentoo? I'd really prefer not having more 'unused flag' warnings ;-). -- Best regards, Michał Górny signature.asc Description: This is a digitally signed message part
[gentoo-dev] [PATCH 1/2] profiles/desc: descriptions for CPU_FLAGS_PPC use_expand
Signed-off-by: Georgy Yakovlev --- profiles/desc/cpu_flags_ppc.desc | 6 ++ 1 file changed, 6 insertions(+) create mode 100644 profiles/desc/cpu_flags_ppc.desc diff --git a/profiles/desc/cpu_flags_ppc.desc b/profiles/desc/cpu_flags_ppc.desc new file mode 100644 index 000..abd2434c4f5 --- /dev/null +++ b/profiles/desc/cpu_flags_ppc.desc @@ -0,0 +1,6 @@ +# Copyright 2019 Gentoo Authors +# Distributed under the terms of the GNU General Public License v2 + +altivec - Use the AltiVec instruction set +vsx - Use the Vector Scalar Extension instruction set (POWER7 and later) +vsx3 - Use the Vector Scalar Extension v.3 instruction set (POWER9 and later) -- 2.23.0
