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Diffstat (limited to 'sys/cddl/boot/zfs/fletcher.c')
-rw-r--r--sys/cddl/boot/zfs/fletcher.c96
1 files changed, 96 insertions, 0 deletions
diff --git a/sys/cddl/boot/zfs/fletcher.c b/sys/cddl/boot/zfs/fletcher.c
new file mode 100644
index 000000000000..2aa381a9d9a4
--- /dev/null
+++ b/sys/cddl/boot/zfs/fletcher.c
@@ -0,0 +1,96 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
+ * Use is subject to license terms.
+ */
+
+static void
+fletcher_2_native(const void *buf, uint64_t size,
+ const void *ctx_template __unused, zio_cksum_t *zcp)
+{
+ const uint64_t *ip = buf;
+ const uint64_t *ipend = ip + (size / sizeof (uint64_t));
+ uint64_t a0, b0, a1, b1;
+
+ for (a0 = b0 = a1 = b1 = 0; ip < ipend; ip += 2) {
+ a0 += ip[0];
+ a1 += ip[1];
+ b0 += a0;
+ b1 += a1;
+ }
+
+ ZIO_SET_CHECKSUM(zcp, a0, a1, b0, b1);
+}
+
+static void
+fletcher_2_byteswap(const void *buf, uint64_t size,
+ const void *ctx_template __unused, zio_cksum_t *zcp)
+{
+ const uint64_t *ip = buf;
+ const uint64_t *ipend = ip + (size / sizeof (uint64_t));
+ uint64_t a0, b0, a1, b1;
+
+ for (a0 = b0 = a1 = b1 = 0; ip < ipend; ip += 2) {
+ a0 += BSWAP_64(ip[0]);
+ a1 += BSWAP_64(ip[1]);
+ b0 += a0;
+ b1 += a1;
+ }
+
+ ZIO_SET_CHECKSUM(zcp, a0, a1, b0, b1);
+}
+
+static void
+fletcher_4_native(const void *buf, uint64_t size,
+ const void *ctx_template __unused, zio_cksum_t *zcp)
+{
+ const uint32_t *ip = buf;
+ const uint32_t *ipend = ip + (size / sizeof (uint32_t));
+ uint64_t a, b, c, d;
+
+ for (a = b = c = d = 0; ip < ipend; ip++) {
+ a += ip[0];
+ b += a;
+ c += b;
+ d += c;
+ }
+
+ ZIO_SET_CHECKSUM(zcp, a, b, c, d);
+}
+
+static void
+fletcher_4_byteswap(const void *buf, uint64_t size,
+ const void *ctx_template __unused, zio_cksum_t *zcp)
+{
+ const uint32_t *ip = buf;
+ const uint32_t *ipend = ip + (size / sizeof (uint32_t));
+ uint64_t a, b, c, d;
+
+ for (a = b = c = d = 0; ip < ipend; ip++) {
+ a += BSWAP_32(ip[0]);
+ b += a;
+ c += b;
+ d += c;
+ }
+
+ ZIO_SET_CHECKSUM(zcp, a, b, c, d);
+}