Visible to Intel only — GUID: GUID-01C4A32A-4509-40AA-9431-16BFF6148462
Visible to Intel only — GUID: GUID-01C4A32A-4509-40AA-9431-16BFF6148462
?gthr
Gathers a full-storage sparse vector's elements into compressed form.
Syntax
call sgthr(nz, y, x, indx )
call dgthr(nz, y, x, indx )
call cgthr(nz, y, x, indx )
call zgthr(nz, y, x, indx )
res = gthr(x, indx, y)
Include Files
- mkl.fi, blas.f90
Description
The ?gthr routines gather the specified elements of a full-storage sparse vector y into compressed form(nz, x, indx). The routines reference only the elements of y whose indices are listed in the array indx:
x(i) = y(indx(i)), for i=1,2,... ,nz.
Input Parameters
- nz
-
INTEGER. The number of elements of y to be gathered.
- indx
-
INTEGER. Specifies indices of elements to be gathered.
Array, size at least nz.
- y
-
REAL for sgthr
DOUBLE PRECISION for dgthr
COMPLEX for cgthr
DOUBLE COMPLEX for zgthr
Array, size at least max(indx(i)).
Output Parameters
- x
-
REAL for sgthr
DOUBLE PRECISION for dgthr
COMPLEX for cgthr
DOUBLE COMPLEX for zgthr
Array, size at least nz.
Contains the vector converted to the compressed form.
BLAS 95 Interface Notes
Routines in Fortran 95 interface have fewer arguments in the calling sequence than their FORTRAN 77 counterparts. For general conventions applied to skip redundant or reconstructible arguments, see BLAS 95 Interface Conventions.
Specific details for the routine gthr interface are the following:
- x
-
Holds the vector with the number of elements nz.
- indx
-
Holds the vector with the number of elements nz.
- y
-
Holds the vector with the number of elements nz.