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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This archive was generated by hypermail 2b29 : Mon Jul 07 2003 - 22:00:15 EST