Intel® oneAPI DPC++/C++ Compiler Developer Guide and Reference

ID 767253
Date 3/22/2024
Public

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Document Table of Contents

Classes Quick Reference

This appendix contains tables listing operators to perform various SIMD operations, corresponding intrinsics to perform those operations, and the classes that implement those operations. The classes listed here belong to the Intel® C++ Class Libraries for SIMD Operations.

In the following tables,

  • N/A indicates that the operator is not implemented in that particular class. For example, in the Logical Operations table, the Andnot operator is not implemented in the F32vec4 and F32vec1 classes.

  • All other entries under Classes indicate that those operators are implemented in those particular classes, and the entries under the Classes columns provide the suffix for the corresponding intrinsic. For example, consider the Arithmetic Operations: Part1 table, where the corresponding intrinsic is _mm_add_[x] and the entry epi16 is under the I16vec8 column. It means that the I16vec8 class implements the addition operators and the corresponding intrinsic is _mm_add_epi16.

Logical Operations

Operators

Corresponding
Intrinsic

Classes

I128vec1,
I64vec2,
I32vec4,
I16vec8,
I8vec16

I64vec1,
I32vec2,
I16vec4,
I8vec8

F64vec2

F32vec4

F32vec1

&, &=

_mm_and_[x]

si128

si64

pd

ps

ps

|, |=

_mm_or_[x]

si128

si64

pd

ps

ps

^, ^=

_mm_xor_[x]

si128

si64

pd

ps

ps

Andnot

_mm_andnot_[x]

si128

si64

pd

N/A

N/A

Arithmetic Operations

Part 1

Operators

Corresponding
Intrinsic

Classes

I64vec2

I32vec4

I16vec8

I8vec16

+, +=

_mm_add_[x]

epi64

epi32

epi16

epi8

-, -=

_mm_sub_[x]

epi64

epi32

epi16

epi8

*, *=

_mm_mullo_[x]

N/A

N/A

epi16

N/A

/, /=

_mm_div_[x]

N/A

N/A

N/A

N/A

mul_high

_mm_mulhi_[x]

N/A

N/A

epi16

N/A

mul_add

_mm_madd_[x]

N/A

N/A

epi16

N/A

sqrt

_mm_sqrt_[x]

N/A

N/A

N/A

N/A

rcp

_mm_rcp_[x]

N/A

N/A

N/A

N/A

rcp_nr

_mm_rcp_[x]
_mm_add_[x]
_mm_sub_[x]
_mm_mul_[x]

N/A

N/A

N/A

N/A

rsqrt

_mm_rsqrt_[x]

N/A

N/A

N/A

N/A

rsqrt_nr

_mm_rsqrt_[x]
_mm_sub_[x]
_mm_mul_[x]

N/A

N/A

N/A

N/A

Part 2

Operators

Corresponding
Intrinsic

Classes

I32vec2

I16vec4

I8vec8

F64vec2

F32vec4

F32vec1

+, +=

_mm_add_[x]

pi32

pi16

pi8

pd

ps

ss

-, -=

_mm_sub_[x]

pi32

pi16

pi8

pd

ps

ss

*, *=

_mm_mullo_[x]

N/A

pi16

N/A

pd

ps

ss

/, /=

_mm_div_[x]

N/A

N/A

N/A

pd

ps

ss

mul_high

_mm_mulhi_[x]

N/A

pi16

N/A

N/A

N/A

N/A

mul_add

_mm_madd_[x]

N/A

pi16

N/A

N/A

N/A

N/A

sqrt

_mm_sqrt_[x]

N/A

N/A

N/A

pd

ps

ss

rcp

_mm_rcp_[x]

N/A

N/A

N/A

pd

ps

ss

rcp_nr

_mm_rcp_[x]
_mm_add_[x]
_mm_sub_[x]
_mm_mul_[x]

N/A

N/A

N/A

pd

ps

ss

rsqrt

_mm_rsqrt_[x]

N/A

N/A

N/A

pd

ps

ss

rsqrt_nr

_mm_rsqrt_[x]
_mm_sub_[x]
_mm_mul_[x]

N/A

N/A

N/A

pd

ps

ss

Shift Operations

Part 1

Operators

Corresponding
Intrinsic

Classes

I128vec1

I64vec2

I32vec4

I16vec8

I8vec16

>>,>>=

_mm_srl_[x]
_mm_srli_[x]
_mm_sra__[x]
_mm_srai_[x]

N/A
N/A
N/A
N/A

epi64
epi64
N/A
N/A

epi32
epi32
epi32
epi32

epi16
epi16
epi16
epi16

N/A
N/A
N/A
N/A

<<, <<=

_mm_sll_[x]
_mm_slli_[x]

N/A
N/A

epi64
epi64

epi32
epi32

epi16
epi16

N/A
N/A

Part 2

Operators

Corresponding
Intrinsic

Classes

I64vec1

I32vec2

I16vec4

I8vec8

>>,>>=

_mm_srl_[x]
_mm_srli_[x]
_mm_sra__[x]
_mm_srai_[x]

si64
si64
N/A
N/A

pi32
pi32
pi32
pi32

pi16
pi16
pi16
pi16

N/A
N/A
N/A
N/A

<<, <<=

_mm_sll_[x]
_mm_slli_[x]

si64
si64

pi32
pi32

pi16
pi16

N/A
N/A

Comparison Operations

Part 1

Operators

Corresponding
Intrinsic

Classes

I32vec4

I16vec8

I8vec16

I32vec2

I16vec4

I8vec8

cmpeq

_mm_cmpeq_[x]

epi32

epi16

epi8

pi32

pi16

pi8

cmpneq

_mm_cmpeq_[x]
_mm_andnot_[y]*

epi32
si128

epi16
si128

epi8
si128

pi32
si64

pi16
si64

pi8
si64

cmpgt

_mm_cmpgt_[x]

epi32

epi16

epi8

pi32

pi16

pi8

cmpge

_mm_cmpge_[x]
_mm_andnot_[y]*

epi32
si128

epi16
si128

epi8
si128

pi32
si64

pi16
si64

pi8
si64

cmplt

_mm_cmplt_[x]

epi32

epi16

epi8

pi32

pi16

pi8

cmple

_mm_cmple_[x]
_mm_andnot_[y]*

epi32
si128

epi16
si128

epi8
si128

pi32
si64

pi16
si64

pi8
si64

cmpngt

_mm_cmpngt_[x]

epi32

epi16

epi8

pi32

pi16

pi8

cmpnge

_mm_cmpnge_[x]

N/A

N/A

N/A

N/A

N/A

N/A

cmpnlt

_mm_cmpnlt_[x]

N/A

N/A

N/A

N/A

N/A

N/A

cmpnle

_mm_cmpnle_[x]

N/A

N/A

N/A

N/A

N/A

N/A

* Note that _mm_andnot_[y] intrinsics do not apply to the fvec classes.

Part 2

Operators

Corresponding
Intrinsic

Classes

F64vec2

F32vec4

F32vec1

cmpeq

_mm_cmpeq_[x]

pd

ps

ss

cmpneq

_mm_cmpeq_[x]
_mm_andnot_[y]*

pd

ps

ss

cmpgt

_mm_cmpgt_[x]

pd

ps

ss

cmpge

_mm_cmpge_[x]
_mm_andnot_[y]*

pd

ps

ss

cmplt

_mm_cmplt_[x]

pd

ps

ss

cmple

_mm_cmple_[x]
_mm_andnot_[y]*

pd

ps

ss

cmpngt

_mm_cmpngt_[x]

pd

ps

ss

cmpnge

_mm_cmpnge_[x]

pd

ps

ss

cmpnlt

_mm_cmpnlt_[x]

pd

ps

ss

cmpnle

_mm_cmpnle_[x]

pd

ps

ss

* Note that _mm_andnot_[y] intrinsics do not apply to the fvec classes.

Conditional Select Operations

Part 1

Operators

Corresponding
Intrinsic

Classes

I32vec4

I16vec8

I8vec16

I32vec2

I16vec4

I8vec8

select_eq

_mm_cmpeq_[x]
_mm_and_[y]
_mm_andnot_[y]*
_mm_or_[y]

epi32
si128
si128
si128

epi16
si128
si128
si128

epi8
si128
si128
si128

pi32
si64
si64
si64

pi16
si64
si64
si64

pi8
si64
si64
si64

select_neq

_mm_cmpeq_[x]
_mm_and_[y]
_mm_andnot_[y]*
_mm_or_[y]

epi32
si128
si128
si128

epi16
si128
si128
si128

epi8
si128
si128
si128

pi32
si64
si64
si64

pi16
si64
si64
si64

pi8
si64
si64
si64

select_gt

_mm_cmpgt_[x]
_mm_and_[y]
_mm_andnot_[y]*
_mm_or_[y]

epi32
si128
si128
si128

epi16
si128
si128
si128

epi8
si128
si128
si128

pi32
si64
si64
si64

pi16
si64
si64
si64

pi8
si64
si64
si64

select_ge

_mm_cmpge_[x]
_mm_and_[y]
_mm_andnot_[y]*
_mm_or_[y]

epi32
si128
si128
si128

epi16
si128
si128
si128

epi8
si128
si128
si128

pi32
si64
si64
si64

pi16
si64
si64
si64

pi8
si64
si64
si64

select_lt

_mm_cmplt_[x]
_mm_and_[y]
_mm_andnot_[y]*
_mm_or_[y]

epi32
si128
si128
si128

epi16
si128
si128
si128

epi8
si128
si128
si128

pi32
si64
si64
si64

pi16
si64
si64
si64

pi8
si64
si64
si64

select_le

_mm_cmple_[x]
_mm_and_[y]
_mm_andnot_[y]*
_mm_or_[y]

epi32
si128
si128
si128

epi16
si128
si128
si128

epi8
si128
si128
si128

pi32
si64
si64
si64

pi16
si64
si64
si64

pi8
si64
si64
si64

select_ngt

_mm_cmpgt_[x]

N/A

N/A

N/A

N/A

N/A

N/A

select_nge

_mm_cmpge_[x]

N/A

N/A

N/A

N/A

N/A

N/A

select_nlt

_mm_cmplt_[x]

N/A

N/A

N/A

N/A

N/A

N/A

select_nle

_mm_cmple_[x]

N/A

N/A

N/A

N/A

N/A

N/A

* Note that _mm_andnot_[y] intrinsics do not apply to the fvec classes.

Part 2

Operators

Corresponding
Intrinsic

Classes

F64vec2

F32vec4

F32vec1

select_eq

_mm_cmpeq_[x]
_mm_and_[y]
_mm_andnot_[y]*
_mm_or_[y]

pd

ps

ss

select_neq

_mm_cmpeq_[x]
_mm_and_[y]
_mm_andnot_[y]*
_mm_or_[y]

pd

ps

ss

select_gt

_mm_cmpgt_[x]
_mm_and_[y]
_mm_andnot_[y]*
_mm_or_[y]

pd

ps

ss

select_ge

_mm_cmpge_[x]
_mm_and_[y]
_mm_andnot_[y]*
_mm_or_[y]

pd

ps

ss

select_lt

_mm_cmplt_[x]
_mm_and_[y]
_mm_andnot_[y]*
_mm_or_[y]

pd

ps

ss

select_le

_mm_cmple_[x]
_mm_and_[y]
_mm_andnot_[y]*
_mm_or_[y]

pd

ps

ss

select_ngt

_mm_cmpgt_[x]

pd

ps

ss

select_nge

_mm_cmpge_[x]

pd

ps

ss

select_nlt

_mm_cmplt_[x]

pd

ps

ss

select_nle

_mm_cmple_[x]

pd

ps

ss

* Note that _mm_andnot_[y] intrinsics do not apply to the fvec classes.

Packing and Unpacking Operations

Part 1

Operators

Corresponding
Intrinsic

Classes

I64vec2

I32vec4

I16vec8

I8vec16

I32vec2

unpack_high

_mm_unpackhi_[x]

epi64

epi32

epi16

epi8

pi32

unpack_low

_mm_unpacklo_[x]

epi64

epi32

epi16

epi8

pi32

pack_sat

_mm_packs_[x]

N/A

epi32

epi16

N/A

pi32

packu_sat

_mm_packus_[x]

N/A

N/A

epi16

N/A

N/A

sat_add

_mm_adds_[x]

N/A

N/A

epi16

epi8

N/A

sat_sub

_mm_subs_[x]

N/A

N/A

epi16

epi8

N/A

Part 2

Operators

Corresponding
Intrinsic

Classes

I16vec4

I8vec8

F64vec2

F32vec4

F32vec1

unpack_high

_mm_unpackhi_[x]

pi16

pi8

pd

ps

N/A

unpack_low

_mm_unpacklo_[x]

pi16

pi8

pd

ps

N/A

pack_sat

_mm_packs_[x]

pi16

N/A

N/A

N/A

N/A

packu_sat

_mm_packus_[x]

pu16

N/A

N/A

N/A

N/A

sat_add

_mm_adds_[x]

pi16

pi8

pd

ps

ss

sat_sub

_mm_subs_[x]

pi16

pi8

pi16

pi8

pd

Conversions Operations

Conversion operations can be performed using intrinsics only. There are no classes implemented to correspond to these intrinsics.

Operators

Corresponding
Intrinsic

F64vec2ToInt

_mm_cvttsd_si32

F32vec4ToF64vec2

_mm_cvtps_pd

F64vec2ToF32vec4

_mm_cvtpd_ps

IntToF64vec2

_mm_cvtsi32_sd

F32vec4ToInt

_mm_cvtt_ss2si

F32vec4ToIs32vec2

_mm_cvttps_pi32

IntToF32vec4

_mm_cvtsi32_ss

Is32vec2ToF32vec4

_mm_cvtpi32_ps