Re: [PATCH -v2] x86/hweight: Get rid of the special calling convention

[Borislav Petkov]

On Tue, May 10, 2016 at 12:03:48PM -0700, H. Peter Anvin wrote:
> Also, to be fair... if the problem is with these being in C then we
> could just do it in assembly easily enough.

I thought about converting the __sw_hweight* variants to asm but
__sw_hweight32, for example, is 55 bytes here and that's a lot.

Or do you have a better idea?

peterz's sounds ok to me: we call a thunk which then calls __sw_hweight*
after having saved regs properly - problem solved.

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    Boris.

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