Visible to Intel only — GUID: GUID-A016D136-4E28-4852-93ED-6386BFFF223C
Visible to Intel only — GUID: GUID-A016D136-4E28-4852-93ED-6386BFFF223C
?tfttp
Copies a triangular matrix from the rectangular full packed format (TF) to the standard packed format (TP) .
Syntax
call stfttp( transr, uplo, n, arf, ap, info )
call dtfttp( transr, uplo, n, arf, ap, info )
call ctfttp( transr, uplo, n, arf, ap, info )
call ztfttp( transr, uplo, n, arf, ap, info )
Include Files
- mkl.fi
Description
The routine copies a triangular matrix A from the Rectangular Full Packed (RFP) format to the standard packed format. For the description of the RFP format, see Matrix Storage Schemes.
Input Parameters
- transr
-
CHARACTER*1.
= 'N': arf is in the Normal format,
= 'T': arf is in the Transpose format (for stfttp and dtfttp),
= 'C': arf is in the Conjugate-transpose format (for ctfttp and ztfttp).
- uplo
-
CHARACTER*1.
Specifies whether A is upper or lower triangular:
= 'U': A is upper triangular,
= 'L': A is lower triangular.
- n
-
INTEGER. The order of the matrix A. n≥ 0.
- arf
-
REAL for stfttp,
DOUBLE PRECISION for dtfttp,
COMPLEX for ctfttp,
DOUBLE COMPLEX for ztfttp.
Array, size at least max (1, n*(n+1)/2).
On entry, the upper or lower triangular matrix A stored in the RFP format.
Output Parameters
- ap
-
REAL for stfttp,
DOUBLE PRECISION for dtfttp,
COMPLEX for ctfttp,
DOUBLE COMPLEX for ztfttp.
Array, size at least max (1, n*(n+1)/2).
On exit, the upper or lower triangular matrix A, packed columnwise in a linear array.
The j-th column of A is stored in the array ap as follows:
if uplo = 'U', ap(i + (j-1)*j/2) = A(i,j) for 1 ≤ i ≤ j,
if uplo = 'L', ap(i + (j-1)*(2n-j)/2) = A(i,j) for j ≤ i ≤ n.
- info
-
INTEGER. If info = 0, the execution is successful.
If info < 0, the i-th parameter had an illegal value.
If info = -1011, memory allocation error occurred.