m68knommu: add ffs and __ffs plattform which support ISA A+ or ISA C

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the ff1 and bitrev opcode appears in ISA C and ISA A+ what isn't
supported by all plattforms. The assembly optimization is automaticly
enabled if the compiler understand the required cpu keyword.
My m5235 seems to boot and run fine so far.

Signed-off-by: Sebastian Siewior <bigeasy@linutronix.de>
Signed-off-by: Greg Ungerer <gerg@uclinux.org>

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Sebastian Siewior 2008-05-09 16:10:37 +02:00 • committed by Greg Ungerer

parent 5bed10a5ee

commit a6260ef841

2 changed files with 37 additions and 4 deletions

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11

arch/m68knommu/Makefile

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30

include/asm-m68knommu/bitops.h

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