bpf, x64: save one byte per shl/shr/sar when imm is 1

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When we shift by one, we can use a different encoding where imm
is not explicitly needed, which saves 1 byte per such op.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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Daniel Borkmann 2018-02-24 01:07:58 +01:00 • committed by Alexei Starovoitov

parent ee07862f7b

commit 88e69a1fcc

1 changed files with 5 additions and 1 deletions

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arch/x86/net/bpf_jit_comp.c

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