Data.Bits.Pext

Documentation

class Pext a where

Parallel extract bits for Word64

Copies selected bits from src to contiguous low-order bits of the return value; higher-order return value bits are cleared.

>>> pext 1 1 :: Word64
1

Methods

pext

Arguments

:: a

the bitmap from which bits will be extracted

-> a

the bitmap selecting the bits that are to be extracted

-> a

the bitmap containing the extract bits with higher-order bits cleared

Instances

Pext Word

Defined in Data.Bits.Pext

Methods

pext :: Word -> Word -> Word

Pext Word8

Defined in Data.Bits.Pext

Methods

pext :: Word8 -> Word8 -> Word8

Pext Word16

Defined in Data.Bits.Pext

Methods

pext :: Word16 -> Word16 -> Word16

Pext Word32

Defined in Data.Bits.Pext

Methods

pext :: Word32 -> Word32 -> Word32

Pext Word64

Defined in Data.Bits.Pext

Methods

pext :: Word64 -> Word64 -> Word64

fastPextEnabled :: Bool

Runtime flag indicating whether the pext function is using the high-performance. BMI2 instruction set. A value of False indicates that pext is emulated.

Actual performance when using the BMI2 instruction set will vary according to CPU model. For example Intel CPUs currently outperform AMD CPUs in this area.