?tfttr

Developer Reference for Intel® oneAPI Math Kernel Library for Fortran

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ID 766686

Date 10/15/2026

Version

Public

?tfttr

Copies a triangular matrix from the rectangular full packed format (TF) to the standard full format (TR) .

Syntax

call stfttr(transr, uplo, n, arf, a, lda, info)
call dtfttr(transr, uplo, n, arf, a, lda, info)
call ctfttr(transr, uplo, n, arf, a, lda, info)
call ztfttr(transr, uplo, n, arf, a, lda, info)

Include Files

mkl.fi

Description

The routine copies a triangular matrix A from the Rectangular Full Packed (RFP) format to the standard full 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 stfttr and dtfttr ), = ‘C’: arf is in the Conjugate-transpose format (for ctfttr and ztfttr ).

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 matrices arf and a . n≥ 0 .

arf: REAL for stfttr , DOUBLE PRECISION for dtfttr , COMPLEX for ctfttr , DOUBLE COMPLEX for ztfttr . Array, size at least max (1, n *( n +1)/2).

lda

INTEGER . The leading dimension of the array a.lda ≥ max (1, n ).

Output Parameters

a: REAL for stfttr , DOUBLE PRECISION for dtfttr , COMPLEX for ctfttr , DOUBLE COMPLEX for ztfttr . Array, size ( lda, *) . Array, size max(1,lda *n) . On exit, the triangular matrix A . If uplo = ‘U’, the leading n -by- n upper triangular part of the array a contains the upper triangular matrix, and the strictly lower triangular part of a is not referenced. If uplo = ‘L’, the leading n -by- n lower triangular part of the array a contains the lower triangular matrix, and the strictly upper triangular part of a is not referenced.

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.

Return Values

No return value, info is an Output Parameter.

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Developer Reference for Intel® oneAPI Math Kernel Library for Fortran

?tfttr

Syntax

Include Files

Description

Input Parameters

Output Parameters

Return Values