Messages in this thread | | | Date | Tue, 1 Jul 2003 22:12:48 -0700 (PDT) | From | Linus Torvalds <> | Subject | Re: [PATCH] Kill div64.h dupes, parenthesize do_div() macro params |
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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 it.
Linus
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