Intel® C++ Compiler 16.0 User and Reference Guide

_mm512_i32lo[ext]scatter_epi64/ _mm512_mask_i32lo[ext]scatter_epi64

Scatter int64 vector with int32 indices. Corresponding instruction is VPSCATTERDQ. This intrinsic only applies to Intel® Many Integrated Core Architecture (Intel® MIC Architecture).

Syntax

Without Mask

extern void __cdecl _mm512_i32loextscatter_epi64(void* mv, __m512i index, __m512 v1, _MM_DOWNCONV_EPI64_ENUM conv, int scale, int hint);

extern void __cdecl _mm512_i32loscatter_epi64(void* mv, __m512i index, __m512 v1, int scale);

With Mask

extern void __cdecl _mm512_mask_i32loextscatter_epi64(void* mv, __mmask8 k1, __m512i index, __m512 v1, _MM_DOWNCONV_EPI64_ENUM conv, int scale, int hint);

extern void __cdecl _mm512_mask_i32loscatter_epi64(void* mv, __mmask8 k1, __m512i index, __m512 v1, int scale);

Parameters

v1

 source vector

v1_old

 Source vector that retains old values of the destination vector; the resulting vector gets corresponding elements from v1_old for zero mask bits

k1

 Writemask; only those elements of the source vectors with corresponding bit set to '1' in the k1 mask are computed and stored in the result; elements in the result vector corresponding to zero bit in k1 are copied from corresponding elements of vector v1_old

index

 int32 vector containing indexes in memory mv. Only the lower eight elements of the index vector are used.

mv

Pointer to base address in memory

conv

Type of conversion, which can be one of the following:

  • _MM_DOWNCONV_EPI64_NONE - no conversion

scale

Scaling factor for calculating address of elements. Takes following values: 1, 2, 4, and 8. The address of the i-th element in memory is calculated as: mv + index[i] * scale

hint

Hint that indicates to the processor that the data is non-temporal. Takes the value 0 or 1, where:

  • _MM_HINT_NONE = 0
  • _MM_HINT_NT = 1 (Store is non-temporal)

Description

Down-converts and stores all eight elements in int64 vector v1 to the memory locations to which the base address(es) mv and vector index index, with scale scale point.

The non-masked variant of the intrinsic is equivalent to the masked variant with full mask (k1=0xffff).

You can use the simplified version of this intrinsic, without ext in the name, if no conversion and no temporal hint are required.

Returns

None.

Parent topic: Gather and Scatter Intrinsics