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Groups > linux.kernel > #1398679
| From | Borislav Petkov <bp@suse.de> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH -v2] x86/hweight: Get rid of the special calling convention |
| Date | 2016-05-11 06:20 +0200 |
| Message-ID | <rxtMR-Fp-1@gated-at.bofh.it> (permalink) |
| References | (5 earlier) <rxjaP-6ly-9@gated-at.bofh.it> <rxjDP-75T-1@gated-at.bofh.it> <rxlcD-uF-29@gated-at.bofh.it> <rxlmh-zy-13@gated-at.bofh.it> <rxotQ-3v7-13@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Tue, May 10, 2016 at 03:30:48PM -0700, H. Peter Anvin wrote:
> I didn't mean inline assembly.
How does that matter?
The problem is having as less insn bytes as possible and the minimal
size we can do is issuing POPCNT everywhere which is 4 or 5 bytes. The
alternatives then replace that with a CALL which is also 5 bytes.
The way I did it now, it adds 22K more to allyesconfig vmlinux due to
the static_cpu_has doubled alternatives sections and the JMPs. The
thunks will keep those 5 bytes *and* get rid of the calling convention
without the growth.
Or?
--
Regards/Gruss,
Boris.
SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg)
--
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[RFC PATCH] x86/hweight: Get rid of the special calling convention Borislav Petkov <bp@suse.de> - 2016-05-04 20:50 +0200
Re: [RFC PATCH] x86/hweight: Get rid of the special calling convention Brian Gerst <brgerst@gmail.com> - 2016-05-04 21:40 +0200
Re: [RFC PATCH] x86/hweight: Get rid of the special calling convention "H. Peter Anvin" <hpa@zytor.com> - 2016-05-04 21:40 +0200
Re: [RFC PATCH] x86/hweight: Get rid of the special calling convention Borislav Petkov <bp@suse.de> - 2016-05-04 21:50 +0200
Re: [RFC PATCH] x86/hweight: Get rid of the special calling convention "H. Peter Anvin" <hpa@zytor.com> - 2016-05-04 22:00 +0200
Re: [RFC PATCH] x86/hweight: Get rid of the special calling convention Borislav Petkov <bp@suse.de> - 2016-05-04 22:30 +0200
Re: [RFC PATCH] x86/hweight: Get rid of the special calling convention "H. Peter Anvin" <hpa@zytor.com> - 2016-05-04 23:00 +0200
Re: [RFC PATCH] x86/hweight: Get rid of the special calling convention Andi Kleen <andi@firstfloor.org> - 2016-05-04 23:20 +0200
Re: [RFC PATCH] x86/hweight: Get rid of the special calling convention Denys Vlasenko <dvlasenk@redhat.com> - 2016-05-05 15:10 +0200
Re: [RFC PATCH] x86/hweight: Get rid of the special calling convention Borislav Petkov <bp@suse.de> - 2016-05-05 16:10 +0200
[PATCH -v2] x86/hweight: Get rid of the special calling convention Borislav Petkov <bp@suse.de> - 2016-05-10 19:00 +0200
Re: [PATCH -v2] x86/hweight: Get rid of the special calling convention Peter Zijlstra <peterz@infradead.org> - 2016-05-10 19:30 +0200
Re: [PATCH -v2] x86/hweight: Get rid of the special calling convention "H. Peter Anvin" <hpa@zytor.com> - 2016-05-10 21:10 +0200
Re: [PATCH -v2] x86/hweight: Get rid of the special calling convention Borislav Petkov <bp@suse.de> - 2016-05-10 21:20 +0200
Re: [PATCH -v2] x86/hweight: Get rid of the special calling convention "H. Peter Anvin" <hpa@zytor.com> - 2016-05-11 00:40 +0200
Re: [PATCH -v2] x86/hweight: Get rid of the special calling convention Borislav Petkov <bp@suse.de> - 2016-05-11 06:20 +0200
Re: [PATCH -v2] x86/hweight: Get rid of the special calling convention Brian Gerst <brgerst@gmail.com> - 2016-05-11 13:20 +0200
Re: [PATCH -v2] x86/hweight: Get rid of the special calling convention Peter Zijlstra <peterz@infradead.org> - 2016-05-11 13:30 +0200
Re: [PATCH -v2] x86/hweight: Get rid of the special calling convention Borislav Petkov <bp@suse.de> - 2016-05-11 14:50 +0200
Re: [PATCH -v2] x86/hweight: Get rid of the special calling convention "H. Peter Anvin" <hpa@zytor.com> - 2016-05-12 07:00 +0200
Re: [PATCH -v2] x86/hweight: Get rid of the special calling convention Borislav Petkov <bp@suse.de> - 2016-05-12 14:00 +0200
Re: [PATCH -v2] x86/hweight: Get rid of the special calling convention Peter Zijlstra <peterz@infradead.org> - 2016-05-12 14:20 +0200
Re: [PATCH -v2] x86/hweight: Get rid of the special calling convention Borislav Petkov <bp@suse.de> - 2016-05-10 21:10 +0200
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