adef06c7a5
This adds an asm implementation of the p256 functions used in crypto/elliptic, utilizing VMX, VSX to improve performance. On a power9 the improvement is: elliptic benchmarks: name old time/op new time/op delta BaseMult 1.40ms ± 0% 1.44ms ± 0% +2.66% (p=0.029 n=4+4) BaseMultP256 317µs ± 0% 50µs ± 0% -84.14% (p=0.029 n=4+4) ScalarMultP256 854µs ± 2% 214µs ± 0% -74.91% (p=0.029 n=4+4) ecdsa benchmarks: name old time/op new time/op delta SignP256 377µs ± 0% 111µs ± 0% -70.57% (p=0.029 n=4+4) SignP384 6.55ms ± 0% 6.48ms ± 0% -1.03% (p=0.029 n=4+4) VerifyP256 1.19ms ± 0% 0.26ms ± 0% -78.54% (p=0.029 n=4+4) KeyGeneration 319µs ± 0% 52µs ± 0% -83.56% (p=0.029 n=4+4) This implemenation is based on the s390x implementation, using comparable instructions for most with some minor changes where the instructions are not quite the same. Some changes were also needed since s390x is big endian and ppc64le is little endian. This also enables the fuzz_test for ppc64le. Change-Id: I59a69515703b82ad2929f68ba2f11208fa833181 Reviewed-on: https://go-review.googlesource.com/c/go/+/168478 Run-TryBot: Lynn Boger <laboger@linux.vnet.ibm.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Michael Munday <mike.munday@ibm.com> |
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