ARM: 8187/1: add CONFIG_HAVE_ARCH_BITREVERSE to support rbit instruction

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this change add CONFIG_HAVE_ARCH_BITREVERSE config option,
so that we can use some architecture's bitrev hardware instruction
to do bitrev operation.

Introduce __constant_bitrev* macro for constant bitrev operation.

Change __bitrev16() __bitrev32() to be inline function,
don't need export symbol for these tiny functions.

Signed-off-by: Yalin Wang <yalin.wang@sonymobile.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

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Yalin Wang 2014-11-03 03:01:03 +01:00 • committed by Russell King

parent 97bf6af1f9

commit 556d2f055b

3 changed files with 84 additions and 19 deletions

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9

lib/Kconfig

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17

lib/bitrev.c

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