Intel® C++ Compiler 16.0 User and Reference Guide
Calculates error function. Vector variant of erf(x) function for a float32 argument. This intrinsic only applies to Intel® Many Integrated Core Architecture (Intel® MIC Architecture).
Without Mask extern _m512 __cdecl _mm512_erf_ps(_m512 v2); |
With Mask extern _m512 __cdecl _mm512_mask_erf_ps(_m512 v1_old, __mmask16 k1, _m512 v2); |
v2 |
vector with float32 values |
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 |
Calculates the error function of vector v2 elements, which is defined as:
erf(x) = 2/sqrt(pi)* integral from 0 to x of exp(-t*t) dt
The masked variant has two additional arguments: v1_old and k1. Those elements of v2 with the corresponding bit clear in vector mask k1 are not used in the computation. Instead, the corresponding element from v1_old is copied to the resulting vector.
Returns the result of the operation.