Re: 64 bit arithmetic in the kernel

Michael Richardson (mcr@solidum.com)
Mon, 12 Jul 1999 20:59:30 -0400

>>>>> "Richard" == Richard B Johnson <root@chaos.analogic.com> writes:
Richard> On Mon, 12 Jul 1999, Michael Richardson wrote:

>>
>> Is there any easy way to get things like the stuff that it
>> is in libgcc1.a into the Linux kernel? I have need for 64/32 integer divide
>> (gcc calls __udivdi3).
>> This is with 2.2.10, on a Lintel box, and I'm using a module.
>>

Richard> Use inline asm. In Intel, you put the high long-word into edx,
Richard> the low long-word into eax, and "div" either by an immediate or
Richard> something in, say

Uh, that's real portable.

:!mcr!: | Solidum Systems Corporation, http://www.solidum.com
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