1 files changed, 51 insertions, 0 deletions
diff --git a/VNFs/DPPD-PROX/tools/flow_extract/crc.hpp b/VNFs/DPPD-PROX/tools/flow_extract/crc.hpp
new file mode 100644
index 00000000..713b4abd
--- /dev/null
+++ b/VNFs/DPPD-PROX/tools/flow_extract/crc.hpp
@@ -0,0 +1,51 @@
+/*
+// Copyright (c) 2010-2017 Intel Corporation
+//
+// 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.
+*/
+
+#ifndef _CRC_H_
+#define _CRC_H_
+
+static uint32_t crc32(const uint8_t *buf, size_t len, int init)
+{
+	uint32_t ret = init;
+
+	while (len/8) {
+		ret = __builtin_ia32_crc32di(ret, *((uint64_t*)buf));
+		len -= 8;
+		buf += 8;
+	}
+
+	while (len/4) {
+		ret = __builtin_ia32_crc32si(ret, *((uint32_t*)buf));
+		len -= 4;
+		buf += 4;
+	}
+
+	while (len/2) {
+		ret = __builtin_ia32_crc32hi(ret, *((uint16_t*)buf));
+		len -= 2;
+		buf += 2;
+	}
+
+	while (len) {
+		ret = __builtin_ia32_crc32qi(ret, *((uint8_t*)buf));
+		len -= 1;
+		buf += 1;
+	}
+
+	return ret;
+}
+
+#endif /* _CRC_H_ */