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    SubjectRe: [parisc-linux] Re: [PATCH 3/6] C-language equivalents of include/asm-*/bitops.h
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    From: Stuart Brady <sdbrady@ntlworld.com>
    Date: Sun, 29 Jan 2006 07:12:42 +0000

    > There are versions of hweight*() for sparc64 which use POPC when
    > ULTRA_HAS_POPULATION_COUNT is defined, but AFAICS, it's never defined.

    That's right, the problem here is that no chips actually implement
    the instruction in hardware, it is software emulated, ie. useless :-)
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