s390: Provide optimized __arch_hweight*() implementations

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Make use of the popcnt instruction to provide optimized __arch_hweight*()
implementations. The generated code is shorter and avoids rather expensive
functions calls.

Acked-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>

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Heiko Carstens 2024-06-09 21:02:19 +02:00 • committed by Alexander Gordeev

parent 447360d75c

commit 7c67928648

3 changed files with 79 additions and 2 deletions

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2

arch/s390/Kconfig

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76

arch/s390/include/asm/arch_hweight.h

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3

arch/s390/include/asm/bitops.h

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