# Intrinsics for Integer Multiplication 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_mul_epi32`, `_mm512_mask_mul_epi32`, `_mm512_maskz_mul_epi32` | Multiplies alternating int32 vectors together to produce int64. | `VPMULDQ`
`_mm512_mul_epu32`, `_mm512_mask_mul_epu32`, `_mm512_maskz_mul_epu32` | Multiplies alternating unsigned int32 vectors together to produce int64. | `VPMULUDQ`
`_mm512_mullo_epi32`, `_mm512_mask_mullo_epi32` | Multiplies int32 vectors together to produce int64. | `VPMULLD`
`_mm512_mullox_epi64`, `_mm512_mask_mullox_epi64` | Multiplies int64 vectors together to produce int64. | None.

variable | definition
--- | ---
k | writemask used as a selector
a | first source vector element
b | second source vector element
src | source element to use based on writemask result

_mm512_mul_epi32

    extern __m512i __cdecl _mm512_mul_epi32(__m512i a, __m512i b);

Multiplies the low int32 elements from each packed 64-bit element in a and b, and stores the signed 64-bit result.

_mm512_mask_mul_epi32

    extern __m512i __cdecl _mm512_mask_mul_epi32(__m512i src, __mmask8 k, __m512i a, __m512i b);

Multiplies the low int32 elements from each packed 64-bit element in a and b, and stores the signed 64-bit result using writemask k (elements are copied from src when the corresponding mask bit is not set).

_mm512_maskz_mul_epi32

    extern __m512i __cdecl _mm512_maskz_mul_epi32(__mmask8 k, __m512i a, __m512i b);

Multiplies the low int32 elements from each packed 64-bit element in a and b, and stores the signed 64-bit result using zeromask k (elements are zeroed out when the corresponding mask bit is not set).

_mm512_mullo_epi32

    extern __m512i __cdecl _mm512_mullo_epi32(__m512i a, __m512i b);

Multiplies the packed int32 elements in a and b, producing intermediate int64 elements, and stores the low 32 bits of the intermediate integers.

_mm512_mask_mullo_epi32

    extern __m512i __cdecl _mm512_mask_mullo_epi32(__m512i src, __mmask16 k, __m512i a, __m512i b);

Multiplies the packed int32 elements in a and b, producing intermediate int64 elements, and stores the low 32 bits of the intermediate integers in destination using writemask k (elements are copied from src when the corresponding mask bit is not set).

_mm512_mul_epu32

    extern __m512i __cdecl _mm512_mul_epu32(__m512i a, __m512i b);

Multiplies the low unsigned int32 elements from each packed 64-bit element in a and b, and stores the unsigned 64-bit result.

_mm512_mask_mul_epu32

    extern __m512i __cdecl _mm512_mask_mul_epu32(__m512i src, __mmask8 k, __m512i a, __m512i b);

Multiplies the low unsigned int32 elements from each packed 64-bit element in a and b, and stores the unsigned 64-bit result using writemask k (elements are copied from src when the corresponding mask bit is not set).

_mm512_maskz_mul_epu32

    extern __m512i __cdecl _mm512_maskz_mul_epu32(__mmask8 k, __m512i a, __m512i b);

Multiplies the low unsigned int32 elements from each packed 64-bit element in a and b, and stores the unsigned 64-bit result using zeromask k (elements are zeroed out when the corresponding mask bit is not set).

_mm512_mullox_epi64

    extern __m512i __cdecl _mm512_mullox_epi64(__m512i a, __m512i b);

Multiplies each packed int64 element in a and b, and selects the low bits of each product.

_mm512_mask_mullox_epi64

    extern __m512i __cdecl _mm512_mask_mullox_epi64(__m512i, __mmask8 k, __m512i a, __m512i b);

Multiplies each packed int64 element in a and b, and selects the low bits of each product, using zeromask k (elements are zeroed out when the corresponding mask bit is not set).

Parent topic: Intrinsics for Multiplication Operations