Intel® C++ Compiler Classic Developer Guide and Reference

ID 767249
Date 12/16/2022
Public

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<span class='option'> _mm256_castps256_ps128</span>

Typecasts 256-bit single-precision floating point values to 128-bit single-precision floating point values. No corresponding Intel® AVX instruction.

Syntax

extern __m128 _mm256_castps256_ps128(__m256 a);

Arguments

a

256-bit float32 source vector

Description

Performs a typecast operation from 256-bit single-precision floating point values to 128-bit single-precision floating point values.

The lower 128-bits of the source vector are passed unchanged to the result. This intrinsic does not introduce extra moves to the generated code.

Returns

A vector with 128-bit single-precision floating point values.