schur_space Interface
-
- experimental
- 22 statements
- Source File
public interface schur_space
Computes the working array space required by the Schur decomposition solver (Specification)
Description
This interface returns the size of the real or complex working storage required by the
Schur decomposition solver. The working size only depends on the kind (real or complex) and size of
the matrix being decomposed. Storage size can be used to pre-allocate a working array in case several
repeated Schur decompositions of same-size matrices are sought. If pre-allocated working arrays
are provided, no internal allocations will take place during the decomposition.
Subroutines
private module subroutine get_schur_c_workspace(a, lwork, err)
Arguments
| Type | Intent | Optional | Attributes | Name | ||
|---|---|---|---|---|---|---|
| complex(kind=sp), | intent(in), | target | :: | a(:,:) |
Input matrix a[m,m] |
|
| integer(kind=ilp), | intent(out) | :: | lwork |
Minimum workspace size for the decomposition operation |
||
| type(linalg_state_type), | intent(out), | optional | :: | err |
State return flag. Returns an error if the query failed |
private module subroutine get_schur_d_workspace(a, lwork, err)
Arguments
| Type | Intent | Optional | Attributes | Name | ||
|---|---|---|---|---|---|---|
| real(kind=dp), | intent(in), | target | :: | a(:,:) |
Input matrix a[m,m] |
|
| integer(kind=ilp), | intent(out) | :: | lwork |
Minimum workspace size for the decomposition operation |
||
| type(linalg_state_type), | intent(out), | optional | :: | err |
State return flag. Returns an error if the query failed |
private module subroutine get_schur_s_workspace(a, lwork, err)
Arguments
| Type | Intent | Optional | Attributes | Name | ||
|---|---|---|---|---|---|---|
| real(kind=sp), | intent(in), | target | :: | a(:,:) |
Input matrix a[m,m] |
|
| integer(kind=ilp), | intent(out) | :: | lwork |
Minimum workspace size for the decomposition operation |
||
| type(linalg_state_type), | intent(out), | optional | :: | err |
State return flag. Returns an error if the query failed |
private module subroutine get_schur_z_workspace(a, lwork, err)
Arguments
| Type | Intent | Optional | Attributes | Name | ||
|---|---|---|---|---|---|---|
| complex(kind=dp), | intent(in), | target | :: | a(:,:) |
Input matrix a[m,m] |
|
| integer(kind=ilp), | intent(out) | :: | lwork |
Minimum workspace size for the decomposition operation |
||
| type(linalg_state_type), | intent(out), | optional | :: | err |
State return flag. Returns an error if the query failed |