Developer Reference for Intel® oneAPI Math Kernel Library for Fortran
p?lacgv
Conjugates a complex vector.
Syntax
call pclacgv ( n , x , ix , jx , descx , incx )
call pzlacgv ( n , x , ix , jx , descx , incx )
Include Files
mkl_scalapack.h
Description
pclacgv pzlacgv The p?lacgv routine function conjugates a complex vector sub(X) of length n , where sub(X) denotes X(ix, jx:jx+n-1) if incx = m_x , and X(ix:ix+n-1, jx) if incx = 1 .
Input Parameters
n
(global) INTEGER . The length of the distributed vector sub( X ) .
- x
-
(local). COMPLEX for pclacgv COMPLEX*16 for pzlacgv .
Pointer into the local memory to an array of size ( lld_x,* ) . On entry the vector to be conjugated x(i) = X(ix+(jx-1)*m_x+(i-1)*incx) , 1 ≤ i ≤ n .
ix
(global) INTEGER . The row index in the global matrix X indicating the first row of sub( X ).
jx
(global) INTEGER . The column index in the global matrix X indicating the first column of sub( X ).
descx
(global and local) INTEGER . Array of size dlen_ =9. The array descriptor for the distributed matrix X .
incx
(global) INTEGER . The global increment for the elements of X . Only two values of incx are supported in this version, namely 1 and m_x . incx must not be zero.
Output Parameters
- x
-
(local). On exit, the local pieces of conjugated distributed vector sub( X ).