Extract a single bit-field from a 64-bit packed value

Extract a single bit-field from a 64-bit packed value

Usage

ffi_extract_bits64(packed_value, bit_offset, bit_width)

Arguments

packed_value

Packed value (as double for 64-bit range)

bit_offset

Bit offset from LSB (0-based)

bit_width

Number of bits in the field

Value

Extracted value as double (for 64-bit range)

Examples

packed <- ffi_pack_bits64(c(1L, 5L, 12L), c(1L, 3L, 4L))
ffi_extract_bits64(packed, 1L, 3L) # 5 (mode field)
#> [1] 5