[PATCH] [POWERPC] Emulate isel (Integer Select) instruction

Geert Uytterhoeven Geert.Uytterhoeven at sonycom.com
Thu Nov 22 03:50:45 EST 2007


On Wed, 21 Nov 2007, Kumar Gala wrote:
> On Nov 21, 2007, at 7:09 AM, Geert Uytterhoeven wrote:
> > On Tue, 20 Nov 2007, Kumar Gala wrote:
> > > On Nov 20, 2007, at 11:54 AM, Scott Wood wrote:
> > > > Given that the instruction is meant to be a performance enhancement,
> > > > we should probably warn the first few times it's emulated, so the user
> > > > knows they should change their toolchain setup if possible.
> > > 
> > > The same is true of mcrxr, popcntb, and possibly string ld/st.
> > > 
> > > Feel free to submit a patch that warns about their usage.
> 
> How about some per processor counters in sysfs under the processor.

Per processor? That means it has to be per_cpu, which sounds a bit like
overkill to me.

With kind regards,
 
Geert Uytterhoeven
Software Architect

Sony Network and Software Technology Center Europe
The Corporate Village · Da Vincilaan 7-D1 · B-1935 Zaventem · Belgium
 
Phone:    +32 (0)2 700 8453	
Fax:      +32 (0)2 700 8622	
E-mail:   Geert.Uytterhoeven at sonycom.com	
Internet: http://www.sony-europe.com/
 	
Sony Network and Software Technology Center Europe	
A division of Sony Service Centre (Europe) N.V.	
Registered office: Technologielaan 7 · B-1840 Londerzeel · Belgium	
VAT BE 0413.825.160 · RPR Brussels	
Fortis Bank Zaventem · Swift GEBABEBB08A · IBAN BE39001382358619


More information about the Linuxppc-dev mailing list