[lkml]   [2003]   [Jul]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: [PATCH] Kill div64.h dupes, parenthesize do_div() macro params

    On Wed, 2 Jul 2003, Bernardo Innocenti wrote:
    > Wait! It's not documented at all that do_div() really does a
    > 64bit/32bit division with 32bit remainder.

    Oh, it's documented all right. It's even documented by the architectures
    that do it wrong (ie chris/arm26 say "we're not 64-bit but..")

    > What's worse, it has different semantics on different archictecures:

    only because some architectures on purpose get it wrong, because they
    don't care.

    > i386 64/32 -> 64q + 32r (inline asm + C for 64bit case)

    This is the only version that has ever been valid.

    It's a 64/32->64+32. No excuses, no nothing. There is no question about


    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to
    More majordomo info at
    Please read the FAQ at

     \ /
      Last update: 2009-11-18 23:46    [W:0.020 / U:10.832 seconds]
    ©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site