8.2. bits — Bitwise operations

Source code: src/collections/bits.h

Test code: tst/collections/bits/main.c

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Functions

static uint32_t bits_mask_32(int width)

Create a bit mask of given width.

Return

The bit mask.

Parameters

• width: Width in bits.

static uint32_t bits_insert_32(uint32_t dst, int position, int size, uint32_t src)

Insert given number of bits into another value at given position.

For example, bits_insert_32(0xffffffff, 4, 8, 0x12) would return 0xfffff12f.

Return

The resulting value of the insertion.

Parameters

• dst: Value to insert into.
• position: Bit position, counted from LSB, in dst where to insert src, 0-31.
• size: Number of bits to insert. 0-31.
• src: Value to insert into dst.

uint8_t bits_reverse_8(uint8_t value)

Reverse the order of given 8 bits.

Return

Reversed bits.

uint16_t bits_reverse_16(uint16_t value)

Reverse the order of given 16 bits.

Return

Reversed bits.

uint32_t bits_reverse_32(uint32_t value)

Reverse the order of given 32 bits.

Return

Reversed bits.