Intrinsics for FP Addition Operations

Intel® C++ Compiler Classic Developer Guide and Reference

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Date 12/16/2022

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Intrinsics for FP Addition 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_add_round_pd`, `_mm512_mask_add_round_pd`, `_mm512_maskz_add_round_pd`	Add rounded float64 vectors.	`VADDPD`
`_mm512_add_pd`, `_mm512_mask_add_pd`, `_mm512_maskz_add_pd`	Add rounded float64 vectors.	`VADDPD`
`_mm512_add_round_ps`, `_mm512_mask_add_round_ps`, `_mm512_maskz_add_round_ps`	Add rounded float32 vectors.	`VADDPS`
`_mm512_add_ps`, `_mm512_mask_add_ps`, `_mm512_maskz_add_ps`	Add rounded float32 vectors.	`VADDPS`
`_mm_add_round_sd`, `_mm_mask_add_round_sd`, `_mm_maskz_add_round_sd`	Add scalar float64 vectors.	`VADDSD`
`_mm_mask_add_sd`, `_mm_maskz_add_sd`	Add scalar float64 vectors.	`VADDSD`
`_mm_add_round_ss`, `_mm_mask_add_round_ss`, `_mm_maskz_add_round_ss`	Add scalar float32 vectors.	`VADDSS`
`_mm_mask_add_ss`, `_mm_maskz_add_ss`	Add scalar float32 vectors.	`VADDPD`

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
`round`	Rounding control values; these can be one of the following (along with the `sae` suppress all exceptions flag): `_MM_FROUND_TO_NEAREST_INT` - rounds to nearest even `_MM_FROUND_TO_NEG_INF` - rounds to negative infinity `_MM_FROUND_TO_POS_INF` - rounds to positive infinity `_MM_FROUND_TO_ZERO` - rounds to zero `_MM_FROUND_CUR_DIRECTION` - rounds using default from MXCSR register

_mm512_add_pd

extern __m512d __cdecl _mm512_add_pd(__m512d a, __m512d b);

Adds packed float64 elements in a and b, and stores the result.

_mm512_mask_add_pd

extern __m512d __cdecl _mm512_mask_add_pd(__m512d src, __mmask8 k, __m512d a, __m512d b);

Adds packed float64 elements in a and b, and stores the result using writemask k (elements are copied from src when the corresponding mask bit is not set).

_mm512_maskz_add_pd

extern __m512d __cdecl _mm512_maskz_add_pd(__mmask8 k, __m512d a, __m512d b);

Adds packed float64 elements in a and b, and stores the result using zeromask k (elements are zeroed out when the corresponding mask bit is not set).

_mm512_add_round_pd

extern __m512d __cdecl _mm512_add_round_pd(__m512d a, __m512d b, int round);

Adds packed float64 elements in a and b using rounding control round, and stores the result.

_mm512_mask_add_round_pd

extern __m512d __cdecl _mm512_mask_add_round_pd(__m512d src, __mmask8 k, __m512d a, __m512d b, int round);

Adds packed float64 elements in a and b using rounding control round, and stores the result using writemask k (elements are copied from src when the corresponding mask bit is not set).

_mm512_maskz_add_round_pd

extern __m512d __cdecl _mm512_maskz_add_round_pd(__mmask8 k, __m512d a, __m512d b, int round);

Adds packed float64 elements in a and b using rounding control round, and stores the result using zeromask k (elements are zeroed out when the corresponding mask bit is not set).

_mm512_add_ps

extern __m512 __cdecl _mm512_add_ps(__m512 a, __m512 b);

Adds packed float32 elements in a and b, and stores the result.

_mm512_mask_add_ps

extern __m512 __cdecl _mm512_mask_add_ps(__m512 src, __mmask16 k, __m512 a, __m512 b);

Adds packed float32 elements in a and b, and stores the result using writemask k (elements are copied from src when the corresponding mask bit is not set).

_mm512_maskz_add_ps

extern __m512 __cdecl _mm512_maskz_add_ps(__mmask16 k, __m512 a, __m512 b);

Adds packed float32 elements in a and b, and stores the result using zeromask k (elements are zeroed out when the corresponding mask bit is not set).

_mm512_add_round_ps

extern __m512 __cdecl _mm512_add_round_ps(__m512 a, __m512 b, int round);

Adds packed float32 elements in a and b using rounding control round, and stores the result.

_mm512_mask_add_round_ps

extern __m512 __cdecl _mm512_mask_add_round_ps(__m512 src, __mmask16 k, __m512 a, __m512 b, int round);

Adds packed float32 elements in a and b using rounding control round, and stores the result using writemask k (elements are copied from src when the corresponding mask bit is not set).

_mm512_maskz_add_round_ps

extern __m512 __cdecl _mm512_maskz_add_round_ps(__mmask16 k, __m512 a, __m512 b, int round);

Adds packed float32 elements in a and b using rounding control round, and stores the result using zeromask k (elements are zeroed out when the corresponding mask bit is not set).

_mm_add_round_sd

extern __m128d __cdecl _mm_add_round_sd(__m128d a, __m128d b, int round);

Adds the lower float64 element in a and b using rounding control round, stores the result in the lower destination element, and copies the upper element from a to the upper destination element.

_mm_mask_add_round_sd

extern __m128d __cdecl _mm_mask_add_round_sd(__m128d src, __mmask8 k, __m128d a, __m128d b, int round);

Adds the lower float64 element in a and b using rounding control round, stores the result in the lower destination element using writemask k (the element is copied from src when mask bit 0 is not set), and copies the upper element from a to the upper destination element.

_mm_maskz_add_round_sd

extern __m128d __cdecl _mm_maskz_add_round_sd(__mmask8 k, __m128d a, __m128d b, int round);

Adds the lower float64 element in a and b using rounding control round, stores the result in the lower destination element using zeromask k (the element is zeroed out when mask bit 0 is not set), and copies the upper element from a to the upper destination element.

_mm_mask_add_sd

extern __m128d __cdecl _mm_mask_add_sd(__m128d src, __mmask8 k, __m128d a, __m128d b);

Adds the lower float64 element in a and b, stores the result in the lower destination element using writemask k (the element is copied from src when mask bit 0 is not set), and copies the upper element from a to the upper destination element.

_mm_maskz_add_sd

extern __m128d __cdecl _mm_maskz_add_sd(__mmask8 k, __m128d a, __m128d b);

Adds the lower float64 element in a and b, stores the result in the lower destination element using zeromask k (the element is zeroed out when mask bit 0 is not set), and copies the upper element from a to the upper destination element.

_mm_add_round_ss

extern __m128 __cdecl _mm_add_round_ss(__m128 a, __m128 b, int round);

Add the lower float32 element in a and b using rounding control round, stores the result in the lower destination element, and copies the upper three packed elements from a to the upper destination elements.

_mm_mask_add_round_ss

extern __m128 __cdecl _mm_mask_add_round_ss(__m128 src, __mmask8 k, __m128 a, __m128 b, int round);

Add the lower float32 element in a and b using rounding control round, stores the result in the lower destination element using writemask k (the element is copied from src when mask bit 0 is not set), and copies the upper three packed elements from a to the upper destination elements.

_mm_maskz_add_round_ss

extern __m128 __cdecl _mm_maskz_add_round_ss(__mmask8 k, __m128 a, __m128 b, int round);

Add the lower float32 element in a and b using rounding control round, stores the result in the lower destination element using zeromask k (the element is zeroed out when mask bit 0 is not set), and copies the upper three packed elements from a to the upper destination elements.

_mm_mask_add_ss

extern __m128 __cdecl _mm_mask_add_ss(__m128 src, __mmask8 k, __m128 a, __m128 b);

Add the lower float32 element in a and b, stores the result in the lower destination element using writemask k (the element is copied from src when mask bit 0 is not set), and copies the upper three packed elements from a to the upper destination elements.

_mm_maskz_add_ss

extern __m128 __cdecl _mm_maskz_add_ss(__mmask8 k, __m128 a, __m128 b);

Add the lower float32 element in a and b, stores the result in the lower destination element using zeromask k (the element is zeroed out when mask bit 0 is not set), and copies the upper three packed elements from a to the upper destination elements.

Parent topic: Intrinsics for Addition Operations

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Intrinsics for FP Addition Operations