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    SubjectRe: [PATCH] Kill div64.h dupes, parenthesize do_div() macro params

    On Wed, 2 Jul 2003, Bernardo Innocenti wrote:
    > By the way, what do you think about getting rid of the do_div() macro
    > altogether? I've noticed that gcc 3.3 is quite capable of guessing the
    > optimal instruction pattern to use even for the generic do_div()
    > written in C:

    No thank you. 3.x is still broken enough that I don't want to force people
    to use it.

    > This code makes gcc select the "udivmodsi4" pattern on the m68k
    > backend

    Who cares about m68k? Does it do the right thing on x86? gcc 3.2.2 does
    not, it does a "call __udivdi3" + "call __umoddi3", which is a 64/64->64
    thing, which is totally inappropriate, and about a million times slower
    than a single "udiv".

    gcc is crap when it comes to long long. Always has been.


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