# 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).

Parent topic: Intrinsics for Expand and Load Operations