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Re: cr logical instruction for powerpc target
David Edelsohn wrote:
=?ISO-8859-1?Q?R=E9gis Odey=E9?= writes:
Regis> Do you know if there is any specific options of GCC to replace those CR
Regis> logical instructions by another instructions sequences (using copies of
Regis> CRs to GPR and logical operation on the GPRs) ?
There are no specific options to perform that operation.
Thanks for those answers.
For your information, my questions were related to an erratum of the
PPC750GX (erratum #8 in errata notice v1.2):
Move Condition Register Field (mcrf) and logical condition register
instructions (e.g. cror, crand, etc.) will not operate at the rated
maximum frequency of the processor. As a consequence, the condition
register contents may be incorrect.
So we probably have to decrease the frequency of those processors. Not a
very good news.
Regards.
--
Régis Odeyé
Thales Computers, a Thales company. www.thalescomputers.com
E-mail: rod@thalescomputers.fr
Tel: +33 (0)4 98 16 34 86 - Fax: +33 (0)4 98 16 34 01