owner-nrf52sdk/nRF5_SDK_15.3.0/external/nrf_cc310/include/ssi_bitops.h

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/*!
 * \file ssi_bitops.h
 * Bit fields operations macros.
 */
#ifndef _SSI_BITOPS_H_
#define _SSI_BITOPS_H_

#define BITMASK(mask_size) (((mask_size) < 32) ?    \
    ((1UL << (mask_size)) - 1) : 0xFFFFFFFFUL)
#define BITMASK_AT(mask_size, mask_offset) (BITMASK(mask_size) << (mask_offset))

#define BITFIELD_GET(word, bit_offset, bit_size) \
    (((word) >> (bit_offset)) & BITMASK(bit_size))
#define BITFIELD_SET(word, bit_offset, bit_size, new_val)   do {    \
    word = ((word) & ~BITMASK_AT(bit_size, bit_offset)) |       \
        (((new_val) & BITMASK(bit_size)) << (bit_offset));  \
} while (0)

/* Is val aligned to "align" ("align" must be power of 2) */
#ifndef IS_ALIGNED
#define IS_ALIGNED(val, align)      \
    (((uint32_t)(val) & ((align) - 1)) == 0)
#endif

#define SWAP_ENDIAN(word)       \
    (((word) >> 24) | (((word) & 0x00FF0000) >> 8) | \
    (((word) & 0x0000FF00) << 8) | (((word) & 0x000000FF) << 24))

#ifdef BIG__ENDIAN
#define SWAP_TO_LE(word) SWAP_ENDIAN(word)
#define SWAP_TO_BE(word) word
#else
#define SWAP_TO_LE(word) word
#define SWAP_TO_BE(word) SWAP_ENDIAN(word)
#endif



/* Is val a multiple of "mult" ("mult" must be power of 2) */
#define IS_MULT(val, mult)              \
    (((val) & ((mult) - 1)) == 0)

#define IS_NULL_ADDR(adr)       \
    (!(adr))

#endif /*_SSI_BITOPS_H_*/