powerpc/bpf/32: Optimise some particular const operations

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Simplify multiplications and divisions with constants when the
constant is 1 or -1.

When the constant is a power of 2, replace them by bit shits.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/e53b1f4a4150ec6cabcaeeef82bf9c361b5f9204.1675245773.git.christophe.leroy@csgroup.eu

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Christophe Leroy 2023-02-01 11:04:29 +01:00 • committed by Michael Ellerman

parent d3921cbb6c

commit 8616045fe7

1 changed files with 20 additions and 3 deletions

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arch/powerpc/net/bpf_jit_comp32.c

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