On Wed, 11 Jun 2008 00:54:35 +0800 Bean <[EMAIL PROTECTED]> wrote: > On Wed, Jun 11, 2008 at 12:26 AM, Colin D Bennett <[EMAIL PROTECTED]> > wrote: > > I'm working on implementing a higher resolution timer using the x86 > > TSC. However, this entails 64-bit arithmetic since on a 2GHz > > machine it will overflow a 32-bit number every couple of seconds > > (the TSC counter CPU cycles since boot). > > > > So to convert the TSC value into a value in milliseconds, I need to > > do 64-bit division, but when I try to build GRUB now, I get > > > > undefined reference to `__udivdi3' > > > > Is this expected? Should it be possible for me to do division on > > grub_uint64_t types? > > > > BTW, I'm trying to add it to the kernel image, if this makes a > > difference. > > Hi. > > You can use grub_divmod64, which is defined in kern/misc.c
Thanks! That works perfectly.
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