to avoid the // performance overhead of checking it on every block. var ppc64sha2 = godebug.Value("#ppc64sha2") != "off" func init() { impl.Register("sha256", "POWER8", &ppc64sha2) } //go:noescape func blockPOWER(dig *Digest, p []byte) func block(dig *Digest, p []byte) { if ppc64sha2 { blockPOWER(dig, p) } else { blockGeneric(dig, p) } } golang.org/fips140@v1.0.0/fips140/v1.0.0/sha256/sha256block_ppc64x.s // Copyright 2016 The Go Authors. All rights reserved. // Use of this source code is governed...