Fast CRC implementations ported from Intel's efforts

Provides fast CRC32C with PCLMULQDQ instructions in Golang

The white papers on CRC32C calculations with PCLMULQDQ instruction can be
  downloaded from:

http://www.intel.com/content/dam/www/public/us/en/documents/white-papers/crc-iscsi-polynomial-crc32-instruction-paper.pdf
http://www.intel.com/content/dam/www/public/us/en/documents/white-papers/fast-crc-computation-paper.pdf

pkgs/crc32c/cpu/cpu_test.go

@@ -0,0 +1,27 @@
+package cpu
+
+import (
+	. "gopkg.in/check.v1"
+	"testing"
+)
+
+func Test(t *testing.T) { TestingT(t) }
+
+type MySuite struct{}
+
+var _ = Suite(&MySuite{})
+
+func (s *MySuite) TestHasSSE41(c *C) {
+	var bool = HasSSE41()
+	c.Check(bool, Equals, 1)
+}
+
+func (s *MySuite) TestHasAVX(c *C) {
+	var bool = HasAVX()
+	c.Check(bool, Equals, 1)
+}
+
+func (s *MySuite) TestHasAVX2(c *C) {
+	var bool = HasAVX2()
+	c.Check(bool, Equals, 0)
+}