Messages in this thread | | | Date | Sun, 30 Jul 2006 18:21:22 +0300 | From | Avi Kivity <> | Subject | Re: FP in kernelspace |
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Arjan van de Ven wrote: > > > > So 2 questions are: > > > 1) howto FP in kernel > > > > > kernel_fpu_begin(); > > c = d * 3.14; > > kernel_fpu_end(); > > > > unfortunately this only works for MMX not for real fpu (due to exception > handling uglies) >
Perhaps there should be a comment to that effect? Neither the code nor Documentation/preemt-locking (which mentions the fpu) says anything about this little fact.
It's also broken for x86-64, which uses sse for floating point, not the x87 fpu.
-- error compiling committee.c: too many arguments to function
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