crypto: serpent - add x86_64/avx assembler implementation
This patch adds a x86_64/avx assembler implementation of the Serpent block
cipher. The implementation is very similar to the sse2 implementation and
processes eight blocks in parallel. Because of the new non-destructive three
operand syntax all move-instructions can be removed and therefore a little
performance increase is provided.
Patch has been tested with tcrypt and automated filesystem tests.
Tcrypt benchmark results:
Intel Core i5-2500 CPU (fam:6, model:42, step:7)
serpent-avx-x86_64 vs. serpent-sse2-x86_64
128bit key: (lrw:256bit) (xts:256bit)
size ecb-enc ecb-dec cbc-enc cbc-dec ctr-enc ctr-dec lrw-enc lrw-dec xts-enc xts-dec
16B 1.03x 1.01x 1.01x 1.01x 1.00x 1.00x 1.00x 1.00x 1.00x 1.01x
64B 1.00x 1.00x 1.00x 1.00x 1.00x 0.99x 1.00x 1.01x 1.00x 1.00x
256B 1.05x 1.03x 1.00x 1.02x 1.05x 1.06x 1.05x 1.02x 1.05x 1.02x
1024B 1.05x 1.02x 1.00x 1.02x 1.05x 1.06x 1.05x 1.03x 1.05x 1.02x
8192B 1.05x 1.02x 1.00x 1.02x 1.06x 1.06x 1.04x 1.03x 1.04x 1.02x
256bit key: (lrw:384bit) (xts:512bit)
size ecb-enc ecb-dec cbc-enc cbc-dec ctr-enc ctr-dec lrw-enc lrw-dec xts-enc xts-dec
16B 1.01x 1.00x 1.01x 1.01x 1.00x 1.00x 0.99x 1.03x 1.01x 1.01x
64B 1.00x 1.00x 1.00x 1.00x 1.00x 1.00x 1.00x 1.01x 1.00x 1.02x
256B 1.05x 1.02x 1.00x 1.02x 1.05x 1.02x 1.04x 1.05x 1.05x 1.02x
1024B 1.06x 1.02x 1.00x 1.02x 1.07x 1.06x 1.05x 1.04x 1.05x 1.02x
8192B 1.05x 1.02x 1.00x 1.02x 1.06x 1.06x 1.04x 1.05x 1.05x 1.02x
serpent-avx-x86_64 vs aes-asm (8kB block):
128bit 256bit
ecb-enc 1.26x 1.73x
ecb-dec 1.20x 1.64x
cbc-enc 0.33x 0.45x
cbc-dec 1.24x 1.67x
ctr-enc 1.32x 1.76x
ctr-dec 1.32x 1.76x
lrw-enc 1.20x 1.60x
lrw-dec 1.15x 1.54x
xts-enc 1.22x 1.64x
xts-dec 1.17x 1.57x
Signed-off-by: Johannes Goetzfried <Johannes.Goetzfried@informatik.stud.uni-erlangen.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/crypto/Kconfig b/crypto/Kconfig
index e00a4e4..2c1c2df 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -821,6 +821,26 @@
See also:
<http://www.cl.cam.ac.uk/~rja14/serpent.html>
+config CRYPTO_SERPENT_AVX_X86_64
+ tristate "Serpent cipher algorithm (x86_64/AVX)"
+ depends on X86 && 64BIT
+ select CRYPTO_ALGAPI
+ select CRYPTO_CRYPTD
+ select CRYPTO_SERPENT
+ select CRYPTO_LRW
+ select CRYPTO_XTS
+ help
+ Serpent cipher algorithm, by Anderson, Biham & Knudsen.
+
+ Keys are allowed to be from 0 to 256 bits in length, in steps
+ of 8 bits.
+
+ This module provides the Serpent cipher algorithm that processes
+ eight blocks parallel using the AVX instruction set.
+
+ See also:
+ <http://www.cl.cam.ac.uk/~rja14/serpent.html>
+
config CRYPTO_TEA
tristate "TEA, XTEA and XETA cipher algorithms"
select CRYPTO_ALGAPI