Intel® C++ Compiler Classic Developer Guide and Reference

ID 767249
Date 7/13/2023
Public
Document Table of Contents

Intrinsics for FP Expand and Load Operations

The prototypes for Intel® Advanced Vector Extensions 512 (Intel® AVX-512) intrinsics are located in the zmmintrin.h header file.

To use these intrinsics, include the immintrin.h file as follows:

#include <immintrin.h>


Intrinsic Name

Operation

Corresponding
Intel® AVX-512 Instruction

_mm512_expand_pd, _mm512_mask_expand_pd, _mm512_maskz_expand_pd

Load packed float64 values from dense memory.

VEXPANDPD

_mm512_mask_expandloadu_pd, _mm512_maskz_expandloadu_pd

Load packed float64 values from dense memory.

VEXPANDPD

_mm512_expand_ps, _mm512_mask_expand_ps, _mm512_maskz_expand_ps

Load packed float32 values from dense memory.

VEXPANDPS

_mm512_mask_expandloadu_ps, _mm512_maskz_expandloadu_ps

Load packed float32 values from dense memory.

VEXPANDPS


variable definition
k

writemask used as a selector

a

first source vector element

src

source element to use based on writemask result

mem_addr

pointer to memory address


_mm512_expand_pd

extern __m512d __cdecl _mm512_expand_pd(__m512d a);

Loads contiguous active float64 elements from a (those with their respective bit set in mask k), and stores the result.



_mm512_mask_expand_pd

extern __m512d __cdecl _mm512_mask_expand_pd(__m512d src, __mmask8 k, __m512d a);

Loads contiguous active float64 elements from a (those with their respective bit set in mask k), and stores the result using writemask k (elements are copied from src when the corresponding mask bit is not set).



_mm512_maskz_expand_pd

extern __m512d __cdecl _mm512_maskz_expand_pd(__mmask8 k, __m512d a);

Loads contiguous active float64 elements from a (those with their respective bit set in mask k), and stores the result using zeromask k (elements are zeroed out when the corresponding mask bit is not set).



_mm512_expand_ps

extern __m512 __cdecl _mm512_expand_ps(__m512 a);

Loads contiguous active float32 elements from a (those with their respective bit set in mask k), and stores the result.



_mm512_mask_expand_ps

extern __m512 __cdecl _mm512_mask_expand_ps(__m512 src, __mmask16 k, __m512 a);

Loads contiguous active float32 elements from a (those with their respective bit set in mask k), and stores the result using writemask k (elements are copied from src when the corresponding mask bit is not set).



_mm512_maskz_expand_ps

extern __m512 __cdecl _mm512_maskz_expand_ps(__mmask16 k, __m512 a);

Loads contiguous active float32 elements from a (those with their respective bit set in mask k), and stores the result using zeromask k (elements are zeroed out when the corresponding mask bit is not set).



_mm512_mask_expandloadu_pd

extern __m512d __cdecl _mm512_mask_expandloadu_pd(__m512d src, __mmask8 k, void * mem_addr);

Loads contiguous active float64 elements from unaligned memory at mem_addr (those with their respective bit set in mask k), and stores the result using writemask k (elements are copied from src when the corresponding mask bit is not set).



_mm512_maskz_expandloadu_pd

extern __m512d __cdecl _mm512_maskz_expandloadu_pd(__mmask8 k, void * mem_addr);

Loads contiguous active float64 elements from unaligned memory at mem_addr (those with their respective bit set in mask k), and stores the result using zeromask k (elements are zeroed out when the corresponding mask bit is not set).



_mm512_mask_expandloadu_ps

extern __m512 __cdecl _mm512_mask_expandloadu_ps(__m512 src, __mmask16 k, void * mem_addr);

Loads contiguous active float32 elements from unaligned memory at mem_addr (those with their respective bit set in mask k), and stores the result using writemask k (elements are copied from src when the corresponding mask bit is not set).



_mm512_maskz_expandloadu_ps

extern __m512 __cdecl _mm512_maskz_expandloadu_ps(__mmask16 k, void * mem_addr);

Loads contiguous active float32 elements from unaligned memory at mem_addr (those with their respective bit set in mask k), and stores the result using zeromask k (elements are zeroed out when the corresponding mask bit is not set).