897e0807c3
In the s390x assembly implementation of NIST P-256 curve, utilize faster multiply/square instructions introduced in the z14. These new instructions are designed for crypto and are constant time. The algorithm is unchanged except for faster multiplication when run on a z14 or later. On z13, the original mutiplication (also constant time) is used. P-256 performance is critical in many applications, such as Blockchain. name old time new time delta BaseMultP256 24396 ns/op 21564 ns/op 1.13x ScalarMultP256 87546 ns/op 72813 ns/op. 1.20x Change-Id: I7e6d8b420fac56d5f9cc13c9423e2080df854bac Reviewed-on: https://go-review.googlesource.com/c/146022 Reviewed-by: Michael Munday <mike.munday@ibm.com> Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org> Run-TryBot: Michael Munday <mike.munday@ibm.com> |
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The Go Programming Language
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