bmi2intrin.h File Reference

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Macros
#define	__DEFAULT_FN_ATTRS   __attribute__((__always_inline__, __nodebug__, __target__("bmi2")))

Functions
static __inline__ unsigned int __DEFAULT_FN_ATTRS	_bzhi_u32 (unsigned int __X, unsigned int __Y)
	Copies the unsigned 32-bit integer __X and zeroes the upper bits starting at bit number __Y.
static __inline__ unsigned int __DEFAULT_FN_ATTRS	_pdep_u32 (unsigned int __X, unsigned int __Y)
	Deposit (scatter) low-order bits from the unsigned 32-bit integer __X into the 32-bit result, according to the mask in the unsigned 32-bit integer __Y.
static __inline__ unsigned int __DEFAULT_FN_ATTRS	_pext_u32 (unsigned int __X, unsigned int __Y)
	Extract (gather) bits from the unsigned 32-bit integer __X into the low-order bits of the 32-bit result, according to the mask in the unsigned 32-bit integer __Y.
static __inline__ unsigned int __DEFAULT_FN_ATTRS	_mulx_u32 (unsigned int __X, unsigned int __Y, unsigned int *__P)
	Multiplies the unsigned 32-bit integers __X and __Y to form a 64-bit product.

Macro Definition Documentation

__DEFAULT_FN_ATTRS

#define __DEFAULT_FN_ATTRS   __attribute__((__always_inline__, __nodebug__, __target__("bmi2")))

Definition at line 18 of file bmi2intrin.h.

Function Documentation

_bzhi_u32()

static __inline__ unsigned int __DEFAULT_FN_ATTRS _bzhi_u32 ( unsigned int  __X, unsigned int  __Y  )

static

Copies the unsigned 32-bit integer __X and zeroes the upper bits starting at bit number __Y.

i := __Y[7:0]
result := __X
IF i < 32
  result[31:i] := 0
FI

This intrinsic corresponds to the BZHI instruction.

Parameters

__X	The 32-bit source value to copy.
__Y	The lower 8 bits specify the bit number of the lowest bit to zero.

Returns

The partially zeroed 32-bit value.

Definition at line 41 of file bmi2intrin.h.

References __Y.

_mulx_u32()

static __inline__ unsigned int __DEFAULT_FN_ATTRS _mulx_u32 ( unsigned int  __X, unsigned int  __Y, unsigned int *  __P  )

static

Multiplies the unsigned 32-bit integers __X and __Y to form a 64-bit product.

Stores the upper 32 bits of the product in the memory at __P and returns the lower 32 bits.

Store32(__P, (__X * __Y)[63:32])
result := (__X * __Y)[31:0]

This intrinsic corresponds to the MULX instruction.

Parameters

__X	An unsigned 32-bit multiplicand.
__Y	An unsigned 32-bit multiplicand.
__P	A pointer to memory for storing the upper half of the product.

Returns

The lower half of the product.

Definition at line 127 of file bmi2intrin.h.

References __P, __Y, and int.

_pdep_u32()

static __inline__ unsigned int __DEFAULT_FN_ATTRS _pdep_u32 ( unsigned int  __X, unsigned int  __Y  )

static

Deposit (scatter) low-order bits from the unsigned 32-bit integer __X into the 32-bit result, according to the mask in the unsigned 32-bit integer __Y.

All other bits of the result are zero.

i := 0
result := 0
FOR m := 0 TO 31
  IF __Y[m] == 1
    result[m] := __X[i]
    i := i + 1
  ENDIF
ENDFOR

This intrinsic corresponds to the PDEP instruction.

Parameters

__X	The 32-bit source value to copy.
__Y	The 32-bit mask specifying where to deposit source bits.

Returns

The 32-bit result.

Definition at line 71 of file bmi2intrin.h.

References __Y.

_pext_u32()

static __inline__ unsigned int __DEFAULT_FN_ATTRS _pext_u32 ( unsigned int  __X, unsigned int  __Y  )

static

Extract (gather) bits from the unsigned 32-bit integer __X into the low-order bits of the 32-bit result, according to the mask in the unsigned 32-bit integer __Y.

All other bits of the result are zero.

i := 0
result := 0
FOR m := 0 TO 31
  IF __Y[m] == 1
    result[i] := __X[m]
    i := i + 1
  ENDIF
ENDFOR

This intrinsic corresponds to the PEXT instruction.

Parameters

__X	The 32-bit source value to copy.
__Y	The 32-bit mask specifying which source bits to extract.

Returns

The 32-bit result.

Definition at line 101 of file bmi2intrin.h.

References __Y.