1 files changed, 95 insertions, 0 deletions
diff --git a/src/spdk/lib/util/crc32.c b/src/spdk/lib/util/crc32.c
new file mode 100644
index 000000000..34bb60b78
--- /dev/null
+++ b/src/spdk/lib/util/crc32.c
@@ -0,0 +1,95 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright (c) Intel Corporation.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "util_internal.h"
+#include "spdk/crc32.h"
+
+void
+crc32_table_init(struct spdk_crc32_table *table, uint32_t polynomial_reflect)
+{
+	int i, j;
+	uint32_t val;
+
+	for (i = 0; i < 256; i++) {
+		val = i;
+		for (j = 0; j < 8; j++) {
+			if (val & 1) {
+				val = (val >> 1) ^ polynomial_reflect;
+			} else {
+				val = (val >> 1);
+			}
+		}
+		table->table[i] = val;
+	}
+}
+
+#ifdef SPDK_HAVE_ARM_CRC
+
+uint32_t
+crc32_update(const struct spdk_crc32_table *table, const void *buf, size_t len, uint32_t crc)
+{
+	size_t count;
+	const uint64_t *dword_buf;
+
+	count = len & 7;
+	while (count--) {
+		crc = __crc32b(crc, *(const uint8_t *)buf);
+		buf++;
+	}
+	dword_buf = (const uint64_t *)buf;
+
+	count = len / 8;
+	while (count--) {
+		crc = __crc32d(crc, *dword_buf);
+		dword_buf++;
+	}
+
+	return crc;
+}
+
+#else
+
+uint32_t
+crc32_update(const struct spdk_crc32_table *table, const void *buf, size_t len, uint32_t crc)
+{
+	const uint8_t *buf_u8 = buf;
+	size_t i;
+
+	for (i = 0; i < len; i++) {
+		crc = (crc >> 8) ^ table->table[(crc ^ buf_u8[i]) & 0xff];
+	}
+
+	return crc;
+}
+
+#endif