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| author | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2017-01-28 23:25:37 +0000 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2017-02-03 18:16:20 +0800 |
| commit | c458c4ada0e3e3c898a56d0640d2ef70c9f702e3 (patch) | |
| tree | 6f3a83511dfd51e61665f669a7ad7a370723a4a3 | |
| parent | 262ea4f670b792d0985090b1187b1f1ce2c2c648 (diff) | |
| download | linux-c458c4ada0e3e3c898a56d0640d2ef70c9f702e3.tar.bz2 | |
crypto: arm64/aes - performance tweak
Shuffle some instructions around in the __hround macro to shave off
0.1 cycles per byte on Cortex-A57.
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| -rw-r--r-- | arch/arm64/crypto/aes-cipher-core.S | 52 |
1 files changed, 19 insertions, 33 deletions
diff --git a/arch/arm64/crypto/aes-cipher-core.S b/arch/arm64/crypto/aes-cipher-core.S index cd58c61e6677..f2f9cc519309 100644 --- a/arch/arm64/crypto/aes-cipher-core.S +++ b/arch/arm64/crypto/aes-cipher-core.S @@ -20,46 +20,32 @@ tt .req x4 lt .req x2 - .macro __hround, out0, out1, in0, in1, in2, in3, t0, t1, enc - ldp \out0, \out1, [rk], #8 - - ubfx w13, \in0, #0, #8 - ubfx w14, \in1, #8, #8 - ldr w13, [tt, w13, uxtw #2] - ldr w14, [tt, w14, uxtw #2] - + .macro __pair, enc, reg0, reg1, in0, in1e, in1d, shift + ubfx \reg0, \in0, #\shift, #8 .if \enc - ubfx w17, \in1, #0, #8 - ubfx w18, \in2, #8, #8 + ubfx \reg1, \in1e, #\shift, #8 .else - ubfx w17, \in3, #0, #8 - ubfx w18, \in0, #8, #8 + ubfx \reg1, \in1d, #\shift, #8 .endif - ldr w17, [tt, w17, uxtw #2] - ldr w18, [tt, w18, uxtw #2] + ldr \reg0, [tt, \reg0, uxtw #2] + ldr \reg1, [tt, \reg1, uxtw #2] + .endm - ubfx w15, \in2, #16, #8 - ubfx w16, \in3, #24, #8 - ldr w15, [tt, w15, uxtw #2] - ldr w16, [tt, w16, uxtw #2] + .macro __hround, out0, out1, in0, in1, in2, in3, t0, t1, enc + ldp \out0, \out1, [rk], #8 - .if \enc - ubfx \t0, \in3, #16, #8 - ubfx \t1, \in0, #24, #8 - .else - ubfx \t0, \in1, #16, #8 - ubfx \t1, \in2, #24, #8 - .endif - ldr \t0, [tt, \t0, uxtw #2] - ldr \t1, [tt, \t1, uxtw #2] + __pair \enc, w13, w14, \in0, \in1, \in3, 0 + __pair \enc, w15, w16, \in1, \in2, \in0, 8 + __pair \enc, w17, w18, \in2, \in3, \in1, 16 + __pair \enc, \t0, \t1, \in3, \in0, \in2, 24 eor \out0, \out0, w13 - eor \out1, \out1, w17 - eor \out0, \out0, w14, ror #24 - eor \out1, \out1, w18, ror #24 - eor \out0, \out0, w15, ror #16 - eor \out1, \out1, \t0, ror #16 - eor \out0, \out0, w16, ror #8 + eor \out1, \out1, w14 + eor \out0, \out0, w15, ror #24 + eor \out1, \out1, w16, ror #24 + eor \out0, \out0, w17, ror #16 + eor \out1, \out1, w18, ror #16 + eor \out0, \out0, \t0, ror #8 eor \out1, \out1, \t1, ror #8 .endm |