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aa5dafcb5b
The BSWAPx() macros won't do any swapping for big-endian host
because the EXTRACT_BYTE() macro will pickup bytes in reverse
order. Also, the EXTRACT_BYTE() will generate compile error
for constants.
To fix this, we get remove the EXTRACT_BYTE() macro and re-write
BSWAPx() using simple mask and shift operations.
Fixes: 09b34d8cca ("include: Add support for byteorder/endianness
conversion")
Reported-by: Samuel Holland <samuel@sholland.org>
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
62 lines
1.9 KiB
C
62 lines
1.9 KiB
C
/*
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2023 Ventana Micro Systems Inc.
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*/
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#ifndef __SBI_BYTEORDER_H__
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#define __SBI_BYTEORDER_H__
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#include <sbi/sbi_types.h>
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#define BSWAP16(x) ((((x) & 0x00ff) << 8) | \
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(((x) & 0xff00) >> 8))
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#define BSWAP32(x) ((((x) & 0x000000ff) << 24) | \
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(((x) & 0x0000ff00) << 8) | \
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(((x) & 0x00ff0000) >> 8) | \
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(((x) & 0xff000000) >> 24))
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#define BSWAP64(x) ((((x) & 0x00000000000000ffULL) << 56) | \
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(((x) & 0x000000000000ff00ULL) << 40) | \
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(((x) & 0x0000000000ff0000ULL) << 24) | \
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(((x) & 0x00000000ff000000ULL) << 8) | \
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(((x) & 0x000000ff00000000ULL) >> 8) | \
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(((x) & 0x0000ff0000000000ULL) >> 24) | \
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(((x) & 0x00ff000000000000ULL) >> 40) | \
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(((x) & 0xff00000000000000ULL) >> 56))
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#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ /* CPU(little-endian) */
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#define cpu_to_be16(x) ((uint16_t)BSWAP16(x))
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#define cpu_to_be32(x) ((uint32_t)BSWAP32(x))
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#define cpu_to_be64(x) ((uint64_t)BSWAP64(x))
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#define be16_to_cpu(x) ((uint16_t)BSWAP16(x))
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#define be32_to_cpu(x) ((uint32_t)BSWAP32(x))
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#define be64_to_cpu(x) ((uint64_t)BSWAP64(x))
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#define cpu_to_le16(x) ((uint16_t)(x))
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#define cpu_to_le32(x) ((uint32_t)(x))
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#define cpu_to_le64(x) ((uint64_t)(x))
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#define le16_to_cpu(x) ((uint16_t)(x))
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#define le32_to_cpu(x) ((uint32_t)(x))
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#define le64_to_cpu(x) ((uint64_t)(x))
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#else /* CPU(big-endian) */
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#define cpu_to_be16(x) ((uint16_t)(x))
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#define cpu_to_be32(x) ((uint32_t)(x))
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#define cpu_to_be64(x) ((uint64_t)(x))
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#define be16_to_cpu(x) ((uint16_t)(x))
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#define be32_to_cpu(x) ((uint32_t)(x))
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#define be64_to_cpu(x) ((uint64_t)(x))
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#define cpu_to_le16(x) ((uint16_t)BSWAP16(x))
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#define cpu_to_le32(x) ((uint32_t)BSWAP32(x))
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#define cpu_to_le64(x) ((uint64_t)BSWAP64(x))
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#define le16_to_cpu(x) ((uint16_t)BSWAP16(x))
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#define le32_to_cpu(x) ((uint32_t)BSWAP32(x))
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#define le64_to_cpu(x) ((uint64_t)BSWAP64(x))
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#endif
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#endif /* __SBI_BYTEORDER_H__ */
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