Intel® C++ Compiler Classic Developer Guide and Reference

ID 767249
Date 12/16/2022
Public

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<span class='option'> _mm_erf_ps</span>, <span class='option'>_mm256_erf_ps</span>

Calculates error function. Vector variant of erf(x) function for a 128-bit/256-bit vector argument of float32 values.

Syntax

extern __m128 _mm_erf_ps(__m128 v1);

extern __m256 _mm256_erf_ps(__m256 v1);

Arguments

v1

vector with float32 values

Description

Calculates error function of v1 elements, which is defined as:

erf(x) = 2/sqrt(pi)* integral from 0 to x of exp(-t*t) dt

Returns

128-bit/256-bit vector with the result of the operation.

NOTE:

Many routines in the Short Vector Math Library (SVML) are more optimized for Intel® microprocessors than for non-Intel microprocessors.