On Thu, 8 Nov 2007 10:28:06 +0100
Philippe Elie <[email protected]> wrote:
> On Wed, 07 Nov 2007 at 15:05 +0000, Haavard Skinnemoen wrote:
> > + /* PCCNT */
> > + if (ctr->enabled && (pccr & ctr->flag_mask)) {
> > + sysreg_write(PCCNT, -ctr->count);
> > + oprofile_add_sample(regs, PCCNT);
> > + }
> > + ctr++;
> > + /* PCNT0 */
> > + if (ctr->enabled && (pccr & ctr->flag_mask)) {
> > + sysreg_write(PCNT0, -ctr->count);
> > + oprofile_add_sample(regs, PCNT0);
> > + }
> > + ctr++;
> > + /* PCNT1 */
> > + if (ctr->enabled && (pccr & ctr->flag_mask)) {
> > + sysreg_write(PCNT1, -ctr->count);
> > + oprofile_add_sample(regs, PCNT1);
> > + }
>
> Why not a loop here ?
The system register is coded into the instruction as an immediate, so
it would have to be a loop with a switch in it. And with only three
counters, I thought it looked cleaner (and faster) this way.
Håvard
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