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| author | Russell King <rmk+kernel@armlinux.org.uk> | 2018-07-11 10:32:12 +0100 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2018-07-12 20:45:23 +0200 |
| commit | 828e2b90e8e9b5bd844a25f22ceeb8df4dd18b07 (patch) | |
| tree | c487a6b61c89ce646578cad5950403c945517a46 /arch/arm/net/bpf_jit_32.h | |
| parent | 1ca3b17b777c4136f9dba0195e13502c445f4ade (diff) | |
| download | linux-0-day-828e2b90e8e9b5bd844a25f22ceeb8df4dd18b07.tar.gz linux-0-day-828e2b90e8e9b5bd844a25f22ceeb8df4dd18b07.tar.xz | |
ARM: net: bpf: use immediate forms of instructions where possible
Rather than moving constants to a register and then using them in a
subsequent instruction, use them directly in the desired instruction
cutting out the "middle" register. This removes two instructions from
the tail call code path.
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'arch/arm/net/bpf_jit_32.h')
| -rw-r--r-- | arch/arm/net/bpf_jit_32.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm/net/bpf_jit_32.h b/arch/arm/net/bpf_jit_32.h index c55bc39d3e224..dee8a76fb0bcb 100644 --- a/arch/arm/net/bpf_jit_32.h +++ b/arch/arm/net/bpf_jit_32.h @@ -78,6 +78,7 @@ #define ARM_INST_EOR_I 0x02200000 #define ARM_INST_LDST__U 0x00800000 +#define ARM_INST_LDST__IMM12 0x00000fff #define ARM_INST_LDRB_I 0x05500000 #define ARM_INST_LDRB_R 0x07d00000 #define ARM_INST_LDRH_I 0x015000b0 |