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    SubjectRe: [PATCH 1/4] introduce explicit signed/unsigned 64bit divide
    On Thu, 13 Mar 2008, zippel@linux-m68k.org wrote:
    > --- /dev/null 1970-01-01 00:00:00.000000000 +0000
    > +++ linux-2.6/include/linux/math64.h 2008-03-12 21:21:26.000000000 +0100
    > @@ -0,0 +1,72 @@
    > +#ifndef _LINUX_MATH64_H
    > +#define _LINUX_MATH64_H
    > +
    > +#include <linux/types.h>
    > +#include <asm/div64.h>
    > +
    > +#if BITS_PER_LONG == 64
    > +
    > +/**
    > + * div_u64_rem - unsigned 64bit divide with 32bit divisor with remainder
    > + *
    > + * This is commonly provided by 32bit archs to provide an optimized 64bit
    > + * divide.
    > + */
    > +static inline u64 div_u64_rem(u64 dividend, u32 divisor, u32 *remainder)
    > +{
    > + *remainder = dividend % divisor;
    > + return dividend / divisor;
    > +}
    > +
    > +/**
    > + * div_s64_rem - signed 64bit divide with 32bit divisor with remainder
    > + */
    > +static inline u64 div_u64_rem(u64 dividend, u32 divisor, u32 *remainder)
    ^ ^ ^ ^ ^
    s64 div_s64_rem s64 s32 s32
    > +{
    > + *remainder = dividend % divisor;
    > + return dividend / divisor;
    > +}
    > +
    > +#elif BITS_PER_LONG == 32
    > +
    > +#ifndef div_u64_rem
    > +static inline u64 div_u64_rem(u64 dividend, u32 divisor, u32 *remainder)
    > +{
    > + *remainder = do_div(dividend, divisor);
    > + return dividend;
    > +}
    > +#endif
    > +
    > +#ifndef div_s64_rem
    > +extern s64 div_s64_rem(s64 dividend, s32 divisor, s32 *remainder);
    > +#endif

    With kind regards,

    Geert Uytterhoeven
    Software Architect

    Sony Network and Software Technology Center Europe
    The Corporate Village · Da Vincilaan 7-D1 · B-1935 Zaventem · Belgium

    Phone: +32 (0)2 700 8453
    Fax: +32 (0)2 700 8622
    E-mail: Geert.Uytterhoeven@sonycom.com
    Internet: http://www.sony-europe.com/

    Sony Network and Software Technology Center Europe
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