Messages in this thread | | | Date | Tue, 30 Sep 2003 14:28:30 +0300 | From | Matti Aarnio <> | Subject | Re: div64.h:do_div() bug |
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On Tue, Sep 30, 2003 at 01:14:38PM +0300, Matti Aarnio wrote: > On Tue, Sep 30, 2003 at 11:52:29AM +0200, Rogier Wolff wrote: > > On Mon, Sep 29, 2003 at 03:25:19PM +0200, Artur Klauser wrote: > > > I've found that a bug in asm-arm/div64.h:do_div() is preventing correct > > > conversion of timestamps in smbfs (and probably ntfs as well) from NT to > > > > Nope. > > Nope yourself. > > > > if (in.n64 != out.n64) { > > > printf("FAILURE: asm/div64.h:do_div() is broken for 64-bit dividends\n"); > > > > do_div should be/is documented as not doing 64 bit dividents. It does > > 64/32 -> 32 divides, IIRC... > > 64/32 -> 64,32 > > The REMAINDER is 32 bit value.
Non-native english speaker makes the mistake.. MODULUS is 32 bits as is DIVISOR, REMAINDER is 64 bit, as is DIVIDEND.
That is: DIVIDEND / DIVISOR -> REMAINDER , MODULUS
and REMAINDER * DIVISOR + MODULUS = DIVIDEND
> > Roger.
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