Skeleton for assembly and test function

compress_amd64.go

@@ -0,0 +1,48 @@
+//+build !noasm
+//+build !appengine
+
+/*
+ * Copyright 2016 Frank Wessels <fwessels@xs4all.nl>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package blake2b
+
+//go:noescape
+func compressSSE(p []uint8, in, iv, t, f, out []uint64)
+
+func compress(d *digest, p []uint8) {
+	h0, h1, h2, h3, h4, h5, h6, h7 := d.h[0], d.h[1], d.h[2], d.h[3], d.h[4], d.h[5], d.h[6], d.h[7]
+
+	in := make([]uint64, 8, 8)
+	out := make([]uint64, 8, 8)
+
+	for len(p) >= BlockSize {
+		// Increment counter.
+		d.t[0] += BlockSize
+		if d.t[0] < BlockSize {
+			d.t[1]++
+		}
+
+		in[0], in[1], in[2], in[3], in[4], in[5], in[6], in[7] = h0, h1, h2, h3, h4, h5, h6, h7
+
+		compressSSE(p, in, iv[:], d.t[:], d.f[:], out)
+
+		h0, h1, h2, h3, h4, h5, h6, h7 = out[0], out[1], out[2], out[3], out[4], out[5], out[6], out[7]
+
+		p = p[BlockSize:]
+	}
+
+	d.h[0], d.h[1], d.h[2], d.h[3], d.h[4], d.h[5], d.h[6], d.h[7] = h0, h1, h2, h3, h4, h5, h6, h7
+}