Prepare SPL repo to merge with ZFS repo

[mirror_spl.git] / include / spl / sys / byteorder.h

diff --git a/include/spl/sys/byteorder.h b/include/spl/sys/byteorder.h
new file mode 100644 (file)
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--- /dev/null
+++ b/include/spl/sys/byteorder.h
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+/*
+ *  Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
+ *  Copyright (C) 2007 The Regents of the University of California.
+ *  Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
+ *  Written by Brian Behlendorf <behlendorf1@llnl.gov>.
+ *  UCRL-CODE-235197
+ *
+ *  This file is part of the SPL, Solaris Porting Layer.
+ *  For details, see <http://zfsonlinux.org/>.
+ *
+ *  The SPL is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License as published by the
+ *  Free Software Foundation; either version 2 of the License, or (at your
+ *  option) any later version.
+ *
+ *  The SPL is distributed in the hope that it will be useful, but WITHOUT
+ *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ *  for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with the SPL.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _SPL_BYTEORDER_H
+#define        _SPL_BYTEORDER_H
+
+#include <asm/byteorder.h>
+#include <sys/isa_defs.h>
+
+#define        BSWAP_8(x)      ((x) & 0xff)
+#define        BSWAP_16(x)     ((BSWAP_8(x) << 8) | BSWAP_8((x) >> 8))
+#define        BSWAP_32(x)     ((BSWAP_16(x) << 16) | BSWAP_16((x) >> 16))
+#define        BSWAP_64(x)     ((BSWAP_32(x) << 32) | BSWAP_32((x) >> 32))
+
+#define        LE_16(x)        cpu_to_le16(x)
+#define        LE_32(x)        cpu_to_le32(x)
+#define        LE_64(x)        cpu_to_le64(x)
+#define        BE_16(x)        cpu_to_be16(x)
+#define        BE_32(x)        cpu_to_be32(x)
+#define        BE_64(x)        cpu_to_be64(x)
+
+#define        BE_IN8(xa) \
+       *((uint8_t *)(xa))
+
+#define        BE_IN16(xa) \
+       (((uint16_t)BE_IN8(xa) << 8) | BE_IN8((uint8_t *)(xa)+1))
+
+#define        BE_IN32(xa) \
+       (((uint32_t)BE_IN16(xa) << 16) | BE_IN16((uint8_t *)(xa)+2))
+
+#ifdef _BIG_ENDIAN
+static __inline__ uint64_t
+htonll(uint64_t n)
+{
+       return (n);
+}
+
+static __inline__ uint64_t
+ntohll(uint64_t n)
+{
+       return (n);
+}
+#else
+static __inline__ uint64_t
+htonll(uint64_t n)
+{
+       return ((((uint64_t)htonl(n)) << 32) + htonl(n >> 32));
+}
+
+static __inline__ uint64_t
+ntohll(uint64_t n)
+{
+       return ((((uint64_t)ntohl(n)) << 32) + ntohl(n >> 32));
+}
+#endif
+
+#endif /* SPL_BYTEORDER_H */