Intel® C++ Compiler Classic Developer Guide and Reference
Visible to Intel only — GUID: GUID-E280001A-D9C4-4E31-801F-37F25E0D2099
Visible to Intel only — GUID: GUID-E280001A-D9C4-4E31-801F-37F25E0D2099
_mm_erf_pd, _mm256_erf_pd
Calculates error function. Vector variant of erf(x) function for a 128-bit/256-bit vector argument of float64 values.
Syntax
extern __m128d _mm_erf_pd(__m128d v1); |
extern __m256d _mm256_erf_pd(__m256d v1); |
Arguments
v1 |
float64 vector used for the operation |
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.
Many routines in the Short Vector Math Library (SVML) are more optimized for Intel® microprocessors than for non-Intel microprocessors.