Messages in this thread | | | Date | Mon, 18 Jun 2001 18:20:52 -0500 | From | Timur Tabi <> | Subject | Re: gnu asm help... |
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** Reply to message from "Raj, Ashok" <ashok.raj@intel.com> on Mon, 18 Jun 2001 15:56:50 -0700
> also if there is any reference to the gnu asm symtax, please send me a > pointer..
There's lots
> i can understand what the LOCK "incl %0 means.. but not sure what the rest > is for.
LOCK just means the x86 "lock" prefix.
incl is the 32-bit version of "inc" (incremement)
You want to return the variable? Try this:
static __inline__ unsigned long atomic_inc(atomic_t *v) { __asm__ __volatile__( LOCK "incl %0" :"=m" (v->counter) :"m" (v->counter));
return v->counter; }
-- Timur Tabi - ttabi@interactivesi.com Interactive Silicon - http://www.interactivesi.com
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