MAGMA  1.5.0
Matrix Algebra for GPU and Multicore Architectures
 All Functions Groups
double precision

Functions

void magma_dprint (magma_int_t m, magma_int_t n, const double *A, magma_int_t lda)
 magma_dprint prints a matrix that is located on the CPU host. More...
 
void magma_dprint_gpu (magma_int_t m, magma_int_t n, const double *dA, magma_int_t ldda)
 magma_dprint_gpu prints a matrix that is located on the GPU device. More...
 
magma_int_t magma_dnan_inf (magma_uplo_t uplo, magma_int_t m, magma_int_t n, const double *A, magma_int_t lda, magma_int_t *cnt_nan, magma_int_t *cnt_inf)
 magma_dnan_inf checks a matrix that is located on the CPU host for NAN (not-a-number) and INF (infinity) values. More...
 
magma_int_t magma_dnan_inf_gpu (magma_uplo_t uplo, magma_int_t m, magma_int_t n, const double *dA, magma_int_t ldda, magma_int_t *cnt_nan, magma_int_t *cnt_inf)
 magma_dnan_inf checks a matrix that is located on the CPU host for NAN (not-a-number) and INF (infinity) values. More...
 
void magmablas_dgeadd (magma_int_t m, magma_int_t n, double alpha, const double *dA, magma_int_t ldda, double *dB, magma_int_t lddb)
 ZGEADD adds two matrices, dB = alpha*dA + dB. More...
 
void magmablas_dgeadd_batched (magma_int_t m, magma_int_t n, double alpha, const double *const *dAarray, magma_int_t ldda, double **dBarray, magma_int_t lddb, magma_int_t batchCount)
 ZGEADD adds two sets of matrices, dAarray[i] = alpha*dAarray[i] + dBarray[i], for i = 0, ..., batchCount-1. More...
 
void magmablas_dlacpy (magma_uplo_t uplo, magma_int_t m, magma_int_t n, const double *dA, magma_int_t ldda, double *dB, magma_int_t lddb)
 

Note

More...
 
void magmablas_dlacpy_batched (magma_uplo_t uplo, magma_int_t m, magma_int_t n, const double *const *dAarray, magma_int_t ldda, double **dBarray, magma_int_t lddb, magma_int_t batchCount)
 

Note

More...
 
void magmablas_dlag2s (magma_int_t m, magma_int_t n, const double *A, magma_int_t lda, float *SA, magma_int_t ldsa, magma_int_t *info)
 DLAG2S converts a double-real matrix, A, to a single-real matrix, SA. More...
 
double magmablas_dlange (magma_norm_t norm, magma_int_t m, magma_int_t n, const double *A, magma_int_t lda, double *dwork)
 DLANGE returns the value of the one norm, or the Frobenius norm, or the infinity norm, or the element of largest absolute value of a real matrix A. More...
 
double magmablas_dlansy (magma_norm_t norm, magma_uplo_t uplo, magma_int_t n, const double *A, magma_int_t lda, double *dwork)
 DLANSY returns the value of the one norm, or the Frobenius norm, or the infinity norm, or the element of largest absolute value of a real symmetric matrix A. More...
 
void magmablas_dlaset_stream (magma_uplo_t uplo, magma_int_t m, magma_int_t n, double offdiag, double diag, double *dA, magma_int_t ldda, magma_queue_t stream)
 DLASET_STREAM initializes a 2-D array A to DIAG on the diagonal and OFFDIAG on the off-diagonals. More...
 
void magmablas_dlaset (magma_uplo_t uplo, magma_int_t m, magma_int_t n, double offdiag, double diag, double *dA, magma_int_t ldda)
 
void magmablas_dlaset_band_stream (magma_uplo_t uplo, magma_int_t m, magma_int_t n, magma_int_t k, double offdiag, double diag, double *dA, magma_int_t ldda, magma_queue_t stream)
 DLASET_BAND_STREAM initializes the main diagonal of dA to DIAG, and the K-1 sub- or super-diagonals to OFFDIAG. More...
 
void magmablas_dlaset_band (magma_uplo_t uplo, magma_int_t m, magma_int_t n, magma_int_t k, double offdiag, double diag, double *dA, magma_int_t ldda)
 
void magmablas_dslaswp (magma_int_t n, double *a, magma_int_t lda, float *sa, magma_int_t m, const magma_int_t *ipiv, magma_int_t incx)
 Row i of A is cast to single precision in row ipiv[i] of SA, for 0 <= i < M. More...
 
void magmablas_dswapdblk (magma_int_t n, magma_int_t nb, double *dA1, magma_int_t ldda1, magma_int_t inca1, double *dA2, magma_int_t ldda2, magma_int_t inca2)
 This is an auxiliary MAGMA routine. More...
 
void magmablas_dsymmetrize (magma_uplo_t uplo, magma_int_t m, double *dA, magma_int_t ldda)
 DSYMMETRIZE copies lower triangle to upper triangle, or vice-versa, to make dA a general representation of a symmetric matrix. More...
 
void magmablas_dsymmetrize_tiles (magma_uplo_t uplo, magma_int_t m, double *dA, magma_int_t ldda, magma_int_t ntile, magma_int_t mstride, magma_int_t nstride)
 DSYMMETRIZE_TILES copies lower triangle to upper triangle, or vice-versa, to make some blocks of dA into general representations of a symmetric block. More...
 
void magmablas_dtranspose_stream (magma_int_t m, magma_int_t n, const double *dA, magma_int_t ldda, double *dAT, magma_int_t lddat, magma_queue_t stream)
 dtranspose_stream copies and transposes a matrix dA to matrix dAT. More...
 
void magmablas_dtranspose (magma_int_t m, magma_int_t n, const double *dA, magma_int_t ldda, double *dAT, magma_int_t lddat)
 
void magmablas_dtranspose_inplace_stream (magma_int_t n, double *dA, magma_int_t ldda, magma_queue_t stream)
 dtranspose_inplace_stream transposes a square N-by-N matrix in-place. More...
 
void magmablas_dtranspose_inplace (magma_int_t n, double *dA, magma_int_t ldda)
 

Detailed Description

Function Documentation

magma_int_t magma_dnan_inf ( magma_uplo_t  uplo,
magma_int_t  m,
magma_int_t  n,
const double *  A,
magma_int_t  lda,
magma_int_t *  cnt_nan,
magma_int_t *  cnt_inf 
)

magma_dnan_inf checks a matrix that is located on the CPU host for NAN (not-a-number) and INF (infinity) values.

NAN is created by 0/0 and similar. INF is created by x/0 and similar, where x != 0.

Parameters
[in]uplomagma_uplo_t Specifies what part of the matrix A to check.
  • = MagmaUpper: Upper triangular part of A
  • = MagmaLower: Lower triangular part of A
  • = MagmaFull: All of A
[in]mINTEGER The number of rows of the matrix A. M >= 0.
[in]nINTEGER The number of columns of the matrix A. N >= 0.
[in]ADOUBLE_PRECISION array, dimension (LDA,N), on the CPU host. The M-by-N matrix to be printed.
[in]ldaINTEGER The leading dimension of the array A. LDA >= max(1,M).
[out]cnt_nanINTEGER* If non-NULL, on exit contains the number of NAN values in A.
[out]cnt_infINTEGER* If non-NULL, on exit contains the number of INF values in A.
Returns
  • >= 0: Returns number of NAN + number of INF values.
  • < 0: If it returns -i, the i-th argument had an illegal value, or another error occured, such as memory allocation failed.
magma_int_t magma_dnan_inf_gpu ( magma_uplo_t  uplo,
magma_int_t  m,
magma_int_t  n,
const double *  dA,
magma_int_t  ldda,
magma_int_t *  cnt_nan,
magma_int_t *  cnt_inf 
)

magma_dnan_inf checks a matrix that is located on the CPU host for NAN (not-a-number) and INF (infinity) values.

NAN is created by 0/0 and similar. INF is created by x/0 and similar, where x != 0.

Parameters
[in]uplomagma_uplo_t Specifies what part of the matrix A to check.
  • = MagmaUpper: Upper triangular part of A
  • = MagmaLower: Lower triangular part of A
  • = MagmaFull: All of A
[in]mINTEGER The number of rows of the matrix A. M >= 0.
[in]nINTEGER The number of columns of the matrix A. N >= 0.
[in,out]dADOUBLE_PRECISION array, dimension (LDDA,N), on the GPU device. The M-by-N matrix to be printed.
[in]lddaINTEGER The leading dimension of the array A. LDDA >= max(1,M).
[out]cnt_nanINTEGER* If non-NULL, on exit contains the number of NAN values in A.
[out]cnt_infINTEGER* If non-NULL, on exit contains the number of INF values in A.
Returns
  • >= 0: Returns number of NAN + number of INF values.
  • < 0: If it returns -i, the i-th argument had an illegal value, or another error occured, such as memory allocation failed.
void magma_dprint ( magma_int_t  m,
magma_int_t  n,
const double *  A,
magma_int_t  lda 
)

magma_dprint prints a matrix that is located on the CPU host.

The output is intended to be Matlab compatible, to be useful in debugging.

Parameters
[in]mINTEGER The number of rows of the matrix A. M >= 0.
[in]nINTEGER The number of columns of the matrix A. N >= 0.
[in]ADOUBLE_PRECISION array, dimension (LDA,N), on the CPU host. The M-by-N matrix to be printed.
[in]ldaINTEGER The leading dimension of the array A. LDA >= max(1,M).
void magma_dprint_gpu ( magma_int_t  m,
magma_int_t  n,
const double *  dA,
magma_int_t  ldda 
)

magma_dprint_gpu prints a matrix that is located on the GPU device.

Internally, it allocates CPU memory and copies the matrix to the CPU. The output is intended to be Matlab compatible, to be useful in debugging.

Parameters
[in]mINTEGER The number of rows of the matrix A. M >= 0.
[in]nINTEGER The number of columns of the matrix A. N >= 0.
[in]dADOUBLE_PRECISION array, dimension (LDDA,N), on the GPU device. The M-by-N matrix to be printed.
[in]lddaINTEGER The leading dimension of the array A. LDDA >= max(1,M).
void magmablas_dgeadd ( magma_int_t  m,
magma_int_t  n,
double  alpha,
const double *  dA,
magma_int_t  ldda,
double *  dB,
magma_int_t  lddb 
)

ZGEADD adds two matrices, dB = alpha*dA + dB.

Parameters
[in]mINTEGER The number of rows of the matrix dA. M >= 0.
[in]nINTEGER The number of columns of the matrix dA. N >= 0.
[in]alphaDOUBLE_PRECISION The scalar alpha.
[in]dADOUBLE_PRECISION array, dimension (LDDA,N) The m by n matrix dA.
[in]lddaINTEGER The leading dimension of the array dA. LDDA >= max(1,M).
[in,out]dBDOUBLE_PRECISION array, dimension (LDDB,N) The m by n matrix dB.
[in]lddbINTEGER The leading dimension of the array dB. LDDB >= max(1,M).
void magmablas_dgeadd_batched ( magma_int_t  m,
magma_int_t  n,
double  alpha,
const double *const *  dAarray,
magma_int_t  ldda,
double **  dBarray,
magma_int_t  lddb,
magma_int_t  batchCount 
)

ZGEADD adds two sets of matrices, dAarray[i] = alpha*dAarray[i] + dBarray[i], for i = 0, ..., batchCount-1.

Parameters
[in]mINTEGER The number of rows of each matrix dAarray[i]. M >= 0.
[in]nINTEGER The number of columns of each matrix dAarray[i]. N >= 0.
[in]alphaDOUBLE_PRECISION The scalar alpha.
[in]dAarrayarray on GPU, dimension(batchCount), of pointers to arrays, with each array a DOUBLE_PRECISION array, dimension (LDDA,N) The m by n matrices dAarray[i].
[in]lddaINTEGER The leading dimension of each array dAarray[i]. LDDA >= max(1,M).
[in,out]dBarrayarray on GPU, dimension(batchCount), of pointers to arrays, with each array a DOUBLE_PRECISION array, dimension (LDDB,N) The m by n matrices dBarray[i].
[in]lddbINTEGER The leading dimension of each array dBarray[i]. LDDB >= max(1,M).
[in]batchCountINTEGER The number of matrices to add; length of dAarray and dBarray. batchCount >= 0.
void magmablas_dlacpy ( magma_uplo_t  uplo,
magma_int_t  m,
magma_int_t  n,
const double *  dA,
magma_int_t  ldda,
double *  dB,
magma_int_t  lddb 
)

Note

  • UPLO Parameter is disabled
  • Do we want to provide a generic function to the user with all the options?

DLACPY copies all or part of a two-dimensional matrix dA to another matrix dB.

Parameters
[in]uplomagma_uplo_t Specifies the part of the matrix dA to be copied to dB.
  • = MagmaUpper: Upper triangular part
  • = MagmaLower: Lower triangular part Otherwise: All of the matrix dA
[in]mINTEGER The number of rows of the matrix dA. M >= 0.
[in]nINTEGER The number of columns of the matrix dA. N >= 0.
[in]dADOUBLE_PRECISION array, dimension (LDDA,N) The m by n matrix dA. If UPLO = MagmaUpper, only the upper triangle or trapezoid is accessed; if UPLO = MagmaLower, only the lower triangle or trapezoid is accessed.
[in]lddaINTEGER The leading dimension of the array dA. LDDA >= max(1,M).
[out]dBDOUBLE_PRECISION array, dimension (LDDB,N) The m by n matrix dB. On exit, dB = dA in the locations specified by UPLO.
[in]lddbINTEGER The leading dimension of the array dB. LDDB >= max(1,M).
void magmablas_dlacpy_batched ( magma_uplo_t  uplo,
magma_int_t  m,
magma_int_t  n,
const double *const *  dAarray,
magma_int_t  ldda,
double **  dBarray,
magma_int_t  lddb,
magma_int_t  batchCount 
)

Note

  • UPLO Parameter is disabled
  • Do we want to provide a generic function to the user with all the options?

DLACPY copies all or part of a set of two-dimensional matrices dAarray[i] to another set of matrices dBarray[i], for i = 0, ..., batchCount-1.

Parameters
[in]uplomagma_uplo_t Specifies the part of each matrix dAarray[i] to be copied to dBarray[i].
  • = MagmaUpper: Upper triangular part
  • = MagmaLower: Lower triangular part Otherwise: All of each matrix dAarray[i]
[in]mINTEGER The number of rows of each matrix dAarray[i]. M >= 0.
[in]nINTEGER The number of columns of each matrix dAarray[i]. N >= 0.
[in]dAarrayarray on GPU, dimension(batchCount), of pointers to arrays, with each array a DOUBLE_PRECISION array, dimension (LDDA,N) The m by n matrices dAarray[i]. If UPLO = MagmaUpper, only the upper triangle or trapezoid is accessed; if UPLO = MagmaLower, only the lower triangle or trapezoid is accessed.
[in]lddaINTEGER The leading dimension of each array dAarray[i]. LDDA >= max(1,M).
[out]dBarrayarray on GPU, dimension(batchCount), of pointers to arrays, with each array a DOUBLE_PRECISION array, dimension (LDDB,N) The m by n matrices dBarray[i]. On exit, matrix dBarray[i] = matrix dAarray[i] in the locations specified by UPLO.
[in]lddbINTEGER The leading dimension of each array dBarray[i]. LDDB >= max(1,M).
[in]batchCountINTEGER The number of matrices to add; length of dAarray and dBarray. batchCount >= 0.
void magmablas_dlag2s ( magma_int_t  m,
magma_int_t  n,
const double *  A,
magma_int_t  lda,
float *  SA,
magma_int_t  ldsa,
magma_int_t *  info 
)

DLAG2S converts a double-real matrix, A, to a single-real matrix, SA.

RMAX is the overflow for the single-real arithmetic. DLAG2S checks that all the entries of A are between -RMAX and RMAX. If not, the conversion is aborted and a flag is raised.

Parameters
[in]mINTEGER The number of lines of the matrix A. m >= 0.
[in]nINTEGER The number of columns of the matrix A. n >= 0.
[in]ADOUBLE PRECISION array, dimension (LDA,n) On entry, the m-by-n coefficient matrix A.
[in]ldaINTEGER The leading dimension of the array A. LDA >= max(1,m).
[out]SASINGLE PRECISION array, dimension (LDSA,n) On exit, if INFO=0, the m-by-n coefficient matrix SA; if INFO>0, the content of SA is unspecified.
[in]ldsaINTEGER The leading dimension of the array SA. LDSA >= max(1,m).
[out]infoINTEGER
  • = 0: successful exit.
  • < 0: if INFO = -i, the i-th argument had an illegal value
  • = 1: an entry of the matrix A is greater than the SINGLE PRECISION overflow threshold, in this case, the content of SA in exit is unspecified.
double magmablas_dlange ( magma_norm_t  norm,
magma_int_t  m,
magma_int_t  n,
const double *  A,
magma_int_t  lda,
double *  dwork 
)

DLANGE returns the value of the one norm, or the Frobenius norm, or the infinity norm, or the element of largest absolute value of a real matrix A.

Description

DLANGE returns the value

DLANGE = ( max(abs(A(i,j))), NORM = 'M' or 'm' ** not yet supported ( ( norm1(A), NORM = '1', 'O' or 'o' ** not yet supported ( ( normI(A), NORM = 'I' or 'i' ( ( normF(A), NORM = 'F', 'f', 'E' or 'e' ** not yet supported

where norm1 denotes the one norm of a matrix (maximum column sum), normI denotes the infinity norm of a matrix (maximum row sum) and normF denotes the Frobenius norm of a matrix (square root of sum of squares). Note that max(abs(A(i,j))) is not a consistent matrix norm.

Parameters
[in]normCHARACTER*1 Specifies the value to be returned in DLANGE as described above.
[in]mINTEGER The number of rows of the matrix A. M >= 0. When M = 0, DLANGE is set to zero.
[in]nINTEGER The number of columns of the matrix A. N >= 0. When N = 0, DLANGE is set to zero.
[in]ADOUBLE PRECISION array on the GPU, dimension (LDA,N) The m by n matrix A.
[in]ldaINTEGER The leading dimension of the array A. LDA >= max(M,1).
dwork(workspace) DOUBLE PRECISION array on the GPU, dimension (MAX(1,LWORK)), where LWORK >= M when NORM = 'I'; otherwise, WORK is not referenced.
double magmablas_dlansy ( magma_norm_t  norm,
magma_uplo_t  uplo,
magma_int_t  n,
const double *  A,
magma_int_t  lda,
double *  dwork 
)

DLANSY returns the value of the one norm, or the Frobenius norm, or the infinity norm, or the element of largest absolute value of a real symmetric matrix A.

DLANSY = ( max(abs(A(i,j))), NORM = 'M' or 'm' ( ( norm1(A), NORM = '1', 'O' or 'o' ** supported only for (PRECISION_s || PRECISION_d || PRECISION_c || CUDA_ARCH >= 200) ( ( normI(A), NORM = 'I' or 'i' ** supported only for (PRECISION_s || PRECISION_d || PRECISION_c || CUDA_ARCH >= 200) ( ( normF(A), NORM = 'F', 'f', 'E' or 'e' ** not yet supported

where norm1 denotes the one norm of a matrix (maximum column sum), normI denotes the infinity norm of a matrix (maximum row sum) and normF denotes the Frobenius norm of a matrix (square root of sum of squares). Note that max(abs(A(i,j))) is not a consistent matrix norm.

Returns DLANSY < 0: if DLANSY = -i, the i-th argument had an illegal value.

Arguments:

Parameters
[in]normCHARACTER*1 Specifies the value to be returned in DLANSY as described above.
[in]uplomagma_uplo_t Specifies whether the upper or lower triangular part of the symmetric matrix A is to be referenced.
  • = MagmaUpper: Upper triangular part of A is referenced
  • = MagmaLower: Lower triangular part of A is referenced
[in]nINTEGER The order of the matrix A. N >= 0. When N = 0, DLANSY is set to zero.
[in]ADOUBLE PRECISION array on the GPU, dimension (LDA,N) The symmetric matrix A. If UPLO = MagmaUpper, the leading n by n upper triangular part of A contains the upper triangular part of the matrix A, and the strictly lower triangular part of A is not referenced. If UPLO = MagmaLower, the leading n by n lower triangular part of A contains the lower triangular part of the matrix A, and the strictly upper triangular part of A is not referenced. Note that the imaginary parts of the diagonal elements need not be set and are assumed to be zero.
[in]ldaINTEGER The leading dimension of the array A. LDA >= max(N,1).
dwork(workspace) DOUBLE PRECISION array on the GPU, dimension (MAX(1,LWORK)), where LWORK >= N. NOTE: this is different than LAPACK, where WORK is required only for norm1 and normI. Here max-norm also requires work.
void magmablas_dlaset ( magma_uplo_t  uplo,
magma_int_t  m,
magma_int_t  n,
double  offdiag,
double  diag,
double *  dA,
magma_int_t  ldda 
)
void magmablas_dlaset_band ( magma_uplo_t  uplo,
magma_int_t  m,
magma_int_t  n,
magma_int_t  k,
double  offdiag,
double  diag,
double *  dA,
magma_int_t  ldda 
)
void magmablas_dlaset_band_stream ( magma_uplo_t  uplo,
magma_int_t  m,
magma_int_t  n,
magma_int_t  k,
double  offdiag,
double  diag,
double *  dA,
magma_int_t  ldda,
magma_queue_t  stream 
)

DLASET_BAND_STREAM initializes the main diagonal of dA to DIAG, and the K-1 sub- or super-diagonals to OFFDIAG.

This is the same as DLASET_BAND, but adds stream argument.

Parameters
[in]uplomagma_uplo_t Specifies the part of the matrix dA to be set.
  • = MagmaUpper: Upper triangular part
  • = MagmaLower: Lower triangular part
[in]mINTEGER The number of rows of the matrix dA. M >= 0.
[in]nINTEGER The number of columns of the matrix dA. N >= 0.
[in]kINTEGER The number of diagonals to set, including the main diagonal. K >= 0. Currently, K <= 1024 due to CUDA restrictions (max. number of threads per block).
[in]offdiagDOUBLE_PRECISION Off-diagonal elements in the band are set to OFFDIAG.
[in]diagDOUBLE_PRECISION All the main diagonal elements are set to DIAG.
[in]dADOUBLE_PRECISION array, dimension (LDDA,N) The M-by-N matrix dA. If UPLO = MagmaUpper, only the upper triangle or trapezoid is accessed; if UPLO = MagmaLower, only the lower triangle or trapezoid is accessed. On exit, A(i,j) = ALPHA, 1 <= i <= m, 1 <= j <= n where i != j, abs(i-j) < k; A(i,i) = BETA , 1 <= i <= min(m,n)
[in]lddaINTEGER The leading dimension of the array dA. LDDA >= max(1,M).
[in]streammagma_queue_t Stream to execute DLASET in.
Author
Raffaele Solca
Mark Gates
void magmablas_dlaset_stream ( magma_uplo_t  uplo,
magma_int_t  m,
magma_int_t  n,
double  offdiag,
double  diag,
double *  dA,
magma_int_t  ldda,
magma_queue_t  stream 
)

DLASET_STREAM initializes a 2-D array A to DIAG on the diagonal and OFFDIAG on the off-diagonals.

This is the same as DLASET, but adds stream argument.

Parameters
[in]uplomagma_uplo_t Specifies the part of the matrix dA to be set.
  • = MagmaUpper: Upper triangular part
  • = MagmaLower: Lower triangular part Otherwise: All of the matrix dA is set.
[in]mINTEGER The number of rows of the matrix dA. M >= 0.
[in]nINTEGER The number of columns of the matrix dA. N >= 0.
[in]offdiagDOUBLE_PRECISION The scalar OFFDIAG. (In LAPACK this is called ALPHA.)
[in]diagDOUBLE_PRECISION The scalar DIAG. (In LAPACK this is called BETA.)
[in]dADOUBLE_PRECISION array, dimension (LDDA,N) The M-by-N matrix dA. If UPLO = MagmaUpper, only the upper triangle or trapezoid is accessed; if UPLO = MagmaLower, only the lower triangle or trapezoid is accessed. On exit, A(i,j) = OFFDIAG, 1 <= i <= m, 1 <= j <= n, i != j; A(i,i) = DIAG, 1 <= i <= min(m,n)
[in]lddaINTEGER The leading dimension of the array dA. LDDA >= max(1,M).
[in]streammagma_queue_t Stream to execute in.
void magmablas_dslaswp ( magma_int_t  n,
double *  a,
magma_int_t  lda,
float *  sa,
magma_int_t  m,
const magma_int_t *  ipiv,
magma_int_t  incx 
)

Row i of A is cast to single precision in row ipiv[i] of SA, for 0 <= i < M.

N - (input) INTEGER. On entry, N specifies the number of columns of the matrix A.

A - (input) DOUBLE PRECISION array on the GPU, dimension (LDA,N) On entry, the M-by-N matrix to which the row interchanges will be applied.

LDA - (input) INTEGER. LDA specifies the leading dimension of A.

SA - (output) REAL array on the GPU, dimension (LDA,N) On exit, the single precision, permuted matrix.

M - (input) The number of rows to be interchanged.

IPIV - (input) INTEGER array on the GPU, dimension (M) The vector of pivot indices. Row i of A is cast to single precision in row ipiv[i] of SA, for 0 <= i < m.

INCX - (input) INTEGER If IPIV is negative, the pivots are applied in reverse order, otherwise in straight-forward order.

void magmablas_dswapdblk ( magma_int_t  n,
magma_int_t  nb,
double *  dA1,
magma_int_t  ldda1,
magma_int_t  inca1,
double *  dA2,
magma_int_t  ldda2,
magma_int_t  inca2 
)

This is an auxiliary MAGMA routine.

It swaps diagonal blocks of size nb x nb between matrices dA1 and dA2 on the GPU.

The number of blocks swapped is (n-1)/nb. For i = 1 .. (n-1)/nb matrices dA1 + i * nb * (ldda1 + inca1) and dA2 + i * nb * (ldda2 + inca2) are swapped.

void magmablas_dsymmetrize ( magma_uplo_t  uplo,
magma_int_t  m,
double *  dA,
magma_int_t  ldda 
)

DSYMMETRIZE copies lower triangle to upper triangle, or vice-versa, to make dA a general representation of a symmetric matrix.

Parameters
[in]uplomagma_uplo_t Specifies the part of the matrix dA that is valid on input.
  • = MagmaUpper: Upper triangular part
  • = MagmaLower: Lower triangular part
[in]mINTEGER The number of rows of the matrix dA. M >= 0.
[in,out]dADOUBLE_PRECISION array, dimension (LDDA,N) The m by m matrix dA.
[in]lddaINTEGER The leading dimension of the array dA. LDDA >= max(1,M).
void magmablas_dsymmetrize_tiles ( magma_uplo_t  uplo,
magma_int_t  m,
double *  dA,
magma_int_t  ldda,
magma_int_t  ntile,
magma_int_t  mstride,
magma_int_t  nstride 
)

DSYMMETRIZE_TILES copies lower triangle to upper triangle, or vice-versa, to make some blocks of dA into general representations of a symmetric block.

This processes NTILE blocks, typically the diagonal blocks. Each block is offset by mstride rows and nstride columns from the previous block.

Parameters
[in]uplomagma_uplo_t Specifies the part of the matrix dA that is valid on input.
  • = MagmaUpper: Upper triangular part
  • = MagmaLower: Lower triangular part
[in]mINTEGER The number of rows & columns of each square block of dA. M >= 0.
[in,out]dADOUBLE_PRECISION array, dimension (LDDA,N) The matrix dA. N = m + nstride*(ntile-1).
[in]lddaINTEGER The leading dimension of the array dA. LDDA >= max(1, m + mstride*(ntile-1)).
[in]ntileINTEGER Number of blocks to symmetrize.
[in]mstrideINTEGER Row offset from start of one block to start of next block.
[in]nstrideINTEGER Column offset from start of one block to start of next block.
void magmablas_dtranspose ( magma_int_t  m,
magma_int_t  n,
const double *  dA,
magma_int_t  ldda,
double *  dAT,
magma_int_t  lddat 
)
void magmablas_dtranspose_inplace ( magma_int_t  n,
double *  dA,
magma_int_t  ldda 
)
void magmablas_dtranspose_inplace_stream ( magma_int_t  n,
double *  dA,
magma_int_t  ldda,
magma_queue_t  stream 
)

dtranspose_inplace_stream transposes a square N-by-N matrix in-place.

Same as dtranspose_inplace, but adds stream argument.

Parameters
[in]nINTEGER The number of rows & columns of the matrix dA. N >= 0.
[in]dADOUBLE_PRECISION array, dimension (LDDA,N) The N-by-N matrix dA. On exit, dA(j,i) = dA_original(i,j), for 0 <= i,j < N.
[in]lddaINTEGER The leading dimension of the array dA. LDDA >= N.
[in]streammagma_queue_t Stream to execute in.
void magmablas_dtranspose_stream ( magma_int_t  m,
magma_int_t  n,
const double *  dA,
magma_int_t  ldda,
double *  dAT,
magma_int_t  lddat,
magma_queue_t  stream 
)

dtranspose_stream copies and transposes a matrix dA to matrix dAT.

Same as dtranspose, but adds stream argument.

Parameters
[in]mINTEGER The number of rows of the matrix dA. M >= 0.
[in]nINTEGER The number of columns of the matrix dA. N >= 0.
[in]dADOUBLE_PRECISION array, dimension (LDDA,N) The M-by-N matrix dA.
[in]lddaINTEGER The leading dimension of the array dA. LDDA >= M.
[in]dATDOUBLE_PRECISION array, dimension (LDDA,N) The N-by-M matrix dAT.
[in]lddatINTEGER The leading dimension of the array dAT. LDDAT >= N.
[in]streammagma_queue_t Stream to execute in.