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57 lines
1.6 KiB
C
57 lines
1.6 KiB
C
/*
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* Copyright (C) 2001 Sistina Software (UK) Limited.
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*
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* This file is released under the GPL.
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*
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*/
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#ifndef _LVM_XLATE_H
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#define _LVM_XLATE_H
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#ifdef linux
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# include <asm/byteorder.h>
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# define xlate16(x) __cpu_to_le16((x))
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# define xlate32(x) __cpu_to_le32((x))
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# define xlate64(x) __cpu_to_le64((x))
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# define xlate16_be(x) __cpu_to_be16((x))
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# define xlate32_be(x) __cpu_to_be32((x))
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# define xlate64_be(x) __cpu_to_be64((x))
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#else
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# include <machine/endian.h>
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# if !defined(BYTE_ORDER) || \
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(BYTE_ORDER != BIG_ENDIAN && BYTE_ORDER != LITTLE_ENDIAN)
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# error "Undefined or unrecognised BYTE_ORDER";
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# endif
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# define __xlate16(x) (((x) & 0x00ffU) << 8 | \
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((x) & 0xff00U) >> 8)
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# define __xlate32(x) (((x) & 0x000000ffU) << 24 | \
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((x) & 0xff000000U) >> 24 | \
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((x) & 0x0000ff00U) << 8 | \
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((x) & 0x00ff0000U) >> 8)
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# define __xlate64(x) (((x) & 0x00000000000000ffU) << 56 | \
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((x) & 0xff00000000000000U) >> 56 | \
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((x) & 0x000000000000ff00U) << 40 | \
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((x) & 0x00ff000000000000U) >> 40 | \
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((x) & 0x0000000000ff0000U) << 24 | \
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((x) & 0x0000ff0000000000U) >> 24 | \
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((x) & 0x00000000ff000000U) << 8 | \
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((x) & 0x000000ff00000000U) >> 8)
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# if BYTE_ORDER == LITTLE_ENDIAN
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# define xlate16(x) (x)
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# define xlate32(x) (x)
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# define xlate64(x) (x)
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# define xlate16_be(x) __xlate16(x)
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# define xlate32_be(x) __xlate32(x)
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# define xlate64_be(x) __xlate64(x)
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# else
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# define xlate16(x) __xlate16(x)
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# define xlate32(x) __xlate32(x)
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# define xlate64(x) __xlate64(x)
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# define xlate16_be(x) (x)
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# define xlate32_be(x) (x)
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# define xlate64_be(x) (x)
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# endif
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#endif
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#endif
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