core/vm, crypto/blake2b: add SSE, AVX and AVX2 code

crypto/blake2b/blake2bAVX2_amd64.go

@@ -0,0 +1,37 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build go1.7,amd64,!gccgo,!appengine
+
+package blake2b
+
+import "golang.org/x/sys/cpu"
+
+func init() {
+	useAVX2 = cpu.X86.HasAVX2
+	useAVX = cpu.X86.HasAVX
+	useSSE4 = cpu.X86.HasSSE41
+}
+
+//go:noescape
+func fAVX2(h *[8]uint64, m *[16]uint64, c0, c1 uint64, flag uint64, rounds uint64)
+
+//go:noescape
+func fAVX(h *[8]uint64, m *[16]uint64, c0, c1 uint64, flag uint64, rounds uint64)
+
+//go:noescape
+func fSSE4(h *[8]uint64, m *[16]uint64, c0, c1 uint64, flag uint64, rounds uint64)
+
+func f(h *[8]uint64, m *[16]uint64, c0, c1 uint64, flag uint64, rounds uint64) {
+	switch {
+	case useAVX2:
+		fAVX2(h, m, c0, c1, flag, rounds)
+	case useAVX:
+		fAVX(h, m, c0, c1, flag, rounds)
+	case useSSE4:
+		fSSE4(h, m, c0, c1, flag, rounds)
+	default:
+		fGeneric(h, m, c0, c1, flag, rounds)
+	}
+}