sys: byteorder: Add 24 bit variants
This adds sys_*_*24 functions that operation on a 24 bits values. Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
This commit is contained in:
Luiz Augusto von Dentz
Johan Hedberg
parent
53784479b3
commit
7747033fee
1 changed files with 115 additions and 12 deletions
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@ -18,6 +18,9 @@
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/* Internal helpers only used by the sys_* APIs further below */
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#define __bswap_16(x) ((u16_t) ((((x) >> 8) & 0xff) | (((x) & 0xff) << 8)))
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#define __bswap_24(x) ((u32_t) ((((x) >> 16) & 0xff) | \
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(((x)) & 0xff00) | \
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(((x) & 0xff) << 16)))
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#define __bswap_32(x) ((u32_t) ((((x) >> 24) & 0xff) | \
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(((x) >> 8) & 0xff00) | \
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(((x) & 0xff00) << 8) | \
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@ -47,20 +50,20 @@
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* @return 16-bit integer in little-endian format.
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*/
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/** @def sys_be16_to_cpu
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* @brief Convert 16-bit integer from big-endian to host endianness.
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/** @def sys_le24_to_cpu
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* @brief Convert 24-bit integer from little-endian to host endianness.
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*
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* @param val 16-bit integer in big-endian format.
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* @param val 24-bit integer in little-endian format.
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*
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* @return 16-bit integer in host endianness.
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* @return 24-bit integer in host endianness.
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*/
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/** @def sys_cpu_to_be16
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* @brief Convert 16-bit integer from host endianness to big-endian.
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/** @def sys_cpu_to_le24
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* @brief Convert 24-bit integer from host endianness to little-endian.
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*
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* @param val 16-bit integer in host endianness.
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* @param val 24-bit integer in host endianness.
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*
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* @return 16-bit integer in big-endian format.
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* @return 24-bit integer in little-endian format.
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*/
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/** @def sys_le32_to_cpu
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@ -79,6 +82,38 @@
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* @return 32-bit integer in little-endian format.
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*/
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/** @def sys_be16_to_cpu
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* @brief Convert 16-bit integer from big-endian to host endianness.
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*
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* @param val 16-bit integer in big-endian format.
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*
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* @return 16-bit integer in host endianness.
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*/
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/** @def sys_cpu_to_be16
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* @brief Convert 16-bit integer from host endianness to big-endian.
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*
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* @param val 16-bit integer in host endianness.
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*
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* @return 16-bit integer in big-endian format.
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*/
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/** @def sys_be24_to_cpu
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* @brief Convert 24-bit integer from big-endian to host endianness.
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*
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* @param val 24-bit integer in big-endian format.
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*
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* @return 24-bit integer in host endianness.
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*/
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/** @def sys_cpu_to_be24
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* @brief Convert 24-bit integer from host endianness to big-endian.
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*
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* @param val 24-bit integer in host endianness.
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*
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* @return 24-bit integer in big-endian format.
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*/
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/** @def sys_be32_to_cpu
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* @brief Convert 32-bit integer from big-endian to host endianness.
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*
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@ -98,12 +133,16 @@
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#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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#define sys_le16_to_cpu(val) (val)
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#define sys_cpu_to_le16(val) (val)
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#define sys_be16_to_cpu(val) __bswap_16(val)
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#define sys_cpu_to_be16(val) __bswap_16(val)
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#define sys_le24_to_cpu(val) (val)
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#define sys_cpu_to_le24(val) (val)
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#define sys_le32_to_cpu(val) (val)
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#define sys_cpu_to_le32(val) (val)
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#define sys_le64_to_cpu(val) (val)
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#define sys_cpu_to_le64(val) (val)
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#define sys_be16_to_cpu(val) __bswap_16(val)
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#define sys_cpu_to_be16(val) __bswap_16(val)
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#define sys_be24_to_cpu(val) __bswap_24(val)
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#define sys_cpu_to_be24(val) __bswap_24(val)
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#define sys_be32_to_cpu(val) __bswap_32(val)
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#define sys_cpu_to_be32(val) __bswap_32(val)
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#define sys_be64_to_cpu(val) __bswap_64(val)
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@ -111,12 +150,16 @@
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#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
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#define sys_le16_to_cpu(val) __bswap_16(val)
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#define sys_cpu_to_le16(val) __bswap_16(val)
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#define sys_be16_to_cpu(val) (val)
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#define sys_cpu_to_be16(val) (val)
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#define sys_le24_to_cpu(val) __bswap_24(val)
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#define sys_cpu_to_le24(val) __bswap_24(val)
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#define sys_le32_to_cpu(val) __bswap_32(val)
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#define sys_cpu_to_le32(val) __bswap_32(val)
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#define sys_le64_to_cpu(val) __bswap_64(val)
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#define sys_cpu_to_le64(val) __bswap_64(val)
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#define sys_be16_to_cpu(val) (val)
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#define sys_cpu_to_be16(val) (val)
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#define sys_be24_to_cpu(val) (val)
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#define sys_cpu_to_be24(val) (val)
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#define sys_be32_to_cpu(val) (val)
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#define sys_cpu_to_be32(val) (val)
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#define sys_be64_to_cpu(val) (val)
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@ -140,6 +183,21 @@ static inline void sys_put_be16(u16_t val, u8_t dst[2])
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dst[1] = val;
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}
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/**
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* @brief Put a 24-bit integer as big-endian to arbitrary location.
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*
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* Put a 24-bit integer, originally in host endianness, to a
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* potentially unaligned memory location in big-endian format.
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*
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* @param val 24-bit integer in host endianness.
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* @param dst Destination memory address to store the result.
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*/
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static inline void sys_put_be24(u32_t val, u8_t dst[3])
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{
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dst[0] = val >> 16;
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sys_put_be16(val, &dst[1]);
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}
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/**
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* @brief Put a 32-bit integer as big-endian to arbitrary location.
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*
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@ -185,6 +243,21 @@ static inline void sys_put_le16(u16_t val, u8_t dst[2])
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dst[1] = val >> 8;
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}
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/**
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* @brief Put a 24-bit integer as little-endian to arbitrary location.
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*
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* Put a 24-bit integer, originally in host endianness, to a
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* potentially unaligned memory location in littel-endian format.
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*
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* @param val 24-bit integer in host endianness.
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* @param dst Destination memory address to store the result.
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*/
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static inline void sys_put_le24(u32_t val, u8_t dst[3])
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{
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sys_put_le16(val, dst);
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dst[2] = val >> 16;
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}
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/**
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* @brief Put a 32-bit integer as little-endian to arbitrary location.
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*
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@ -230,6 +303,21 @@ static inline u16_t sys_get_be16(const u8_t src[2])
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return ((u16_t)src[0] << 8) | src[1];
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}
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/**
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* @brief Get a 24-bit integer stored in big-endian format.
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*
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* Get a 24-bit integer, stored in big-endian format in a potentially
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* unaligned memory location, and convert it to the host endianness.
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*
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* @param src Location of the big-endian 24-bit integer to get.
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*
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* @return 24-bit integer in host endianness.
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*/
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static inline u32_t sys_get_be24(const u8_t src[3])
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{
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return ((u32_t)src[0] << 16) | sys_get_be16(&src[1]);
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}
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/**
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* @brief Get a 32-bit integer stored in big-endian format.
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*
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@ -275,6 +363,21 @@ static inline u16_t sys_get_le16(const u8_t src[2])
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return ((u16_t)src[1] << 8) | src[0];
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}
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/**
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* @brief Get a 24-bit integer stored in big-endian format.
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*
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* Get a 24-bit integer, stored in big-endian format in a potentially
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* unaligned memory location, and convert it to the host endianness.
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*
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* @param src Location of the big-endian 24-bit integer to get.
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*
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* @return 24-bit integer in host endianness.
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*/
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static inline u32_t sys_get_le24(const u8_t src[3])
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{
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return ((u32_t)src[2] << 16) | sys_get_le16(&src[0]);
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}
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/**
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* @brief Get a 32-bit integer stored in little-endian format.
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*
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