MAGMA  2.3.0 Matrix Algebra for GPU and Multicore Architectures
_lat2_: Converts triangular matrix between single and double

Functions

void magmablas_clat2z (magma_uplo_t uplo, magma_int_t n, magmaFloatComplex_const_ptr SA, magma_int_t ldsa, magmaDoubleComplex_ptr A, magma_int_t lda, magma_queue_t queue, magma_int_t *info)
CLAT2Z converts a single-complex matrix, SA, to a double-complex matrix, A. More...

void magmablas_dlat2s (magma_uplo_t uplo, magma_int_t n, magmaDouble_const_ptr A, magma_int_t lda, magmaFloat_ptr SA, magma_int_t ldsa, magma_queue_t queue, magma_int_t *info)
DLAT2S converts a double-real matrix, A, to a single-real matrix, SA. More...

void magmablas_slat2d (magma_uplo_t uplo, magma_int_t n, magmaFloat_const_ptr SA, magma_int_t ldsa, magmaDouble_ptr A, magma_int_t lda, magma_queue_t queue, magma_int_t *info)
SLAT2D converts a single-real matrix, SA, to a double-real matrix, A. More...

void magmablas_zlat2c (magma_uplo_t uplo, magma_int_t n, magmaDoubleComplex_const_ptr A, magma_int_t lda, magmaFloatComplex_ptr SA, magma_int_t ldsa, magma_queue_t queue, magma_int_t *info)
ZLAT2C converts a double-complex matrix, A, to a single-complex matrix, SA. More...

Function Documentation

 void magmablas_clat2z ( magma_uplo_t uplo, magma_int_t n, magmaFloatComplex_const_ptr SA, magma_int_t ldsa, magmaDoubleComplex_ptr A, magma_int_t lda, magma_queue_t queue, magma_int_t * info )

CLAT2Z converts a single-complex matrix, SA, to a double-complex matrix, A.

Note that while it is possible to overflow while converting from double to single, it is not possible to overflow when converting from single to double.

Parameters
 [in] uplo magma_uplo_t Specifies the part of the matrix A to be converted. = MagmaUpper: Upper triangular part = MagmaLower: Lower triangular part [in] n INTEGER The number of columns of the matrix A. n >= 0. [in] A COMPLEX_16 array, dimension (LDA,n) On entry, the n-by-n coefficient matrix A. [in] lda INTEGER The leading dimension of the array A. LDA >= max(1,n). [out] SA COMPLEX array, dimension (LDSA,n) On exit, if INFO=0, the n-by-n coefficient matrix SA; if INFO > 0, the content of SA is unspecified. [in] ldsa INTEGER The leading dimension of the array SA. LDSA >= max(1,n). [out] info INTEGER = 0: successful exit. < 0: if INFO = -i, the i-th argument had an illegal value [in] queue magma_queue_t Queue to execute in.
 void magmablas_dlat2s ( magma_uplo_t uplo, magma_int_t n, magmaDouble_const_ptr A, magma_int_t lda, magmaFloat_ptr SA, magma_int_t ldsa, magma_queue_t queue, magma_int_t * info )

DLAT2S converts a double-real matrix, A, to a single-real matrix, SA.

RMAX is the overflow for the single-real arithmetic. DLAT2S 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] uplo magma_uplo_t Specifies the part of the matrix A to be converted. = MagmaUpper: Upper triangular part = MagmaLower: Lower triangular part [in] n INTEGER The number of columns of the matrix A. n >= 0. [in] A DOUBLE PRECISION array, dimension (LDA,n) On entry, the n-by-n coefficient matrix A. [in] lda INTEGER The leading dimension of the array A. LDA >= max(1,n). [out] SA SINGLE PRECISION array, dimension (LDSA,n) On exit, if INFO=0, the n-by-n coefficient matrix SA; if INFO > 0, the content of SA is unspecified. [in] ldsa INTEGER The leading dimension of the array SA. LDSA >= max(1,n). [out] info INTEGER = 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 on exit is unspecified. [in] queue magma_queue_t Queue to execute in.
 void magmablas_slat2d ( magma_uplo_t uplo, magma_int_t n, magmaFloat_const_ptr SA, magma_int_t ldsa, magmaDouble_ptr A, magma_int_t lda, magma_queue_t queue, magma_int_t * info )

SLAT2D converts a single-real matrix, SA, to a double-real matrix, A.

Note that while it is possible to overflow while converting from double to single, it is not possible to overflow when converting from single to double.

Parameters
 [in] uplo magma_uplo_t Specifies the part of the matrix A to be converted. = MagmaUpper: Upper triangular part = MagmaLower: Lower triangular part [in] n INTEGER The number of columns of the matrix A. n >= 0. [in] A DOUBLE PRECISION array, dimension (LDA,n) On entry, the n-by-n coefficient matrix A. [in] lda INTEGER The leading dimension of the array A. LDA >= max(1,n). [out] SA SINGLE PRECISION array, dimension (LDSA,n) On exit, if INFO=0, the n-by-n coefficient matrix SA; if INFO > 0, the content of SA is unspecified. [in] ldsa INTEGER The leading dimension of the array SA. LDSA >= max(1,n). [out] info INTEGER = 0: successful exit. < 0: if INFO = -i, the i-th argument had an illegal value [in] queue magma_queue_t Queue to execute in.
 void magmablas_zlat2c ( magma_uplo_t uplo, magma_int_t n, magmaDoubleComplex_const_ptr A, magma_int_t lda, magmaFloatComplex_ptr SA, magma_int_t ldsa, magma_queue_t queue, magma_int_t * info )

ZLAT2C converts a double-complex matrix, A, to a single-complex matrix, SA.

RMAX is the overflow for the single-complex arithmetic. ZLAT2C 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] uplo magma_uplo_t Specifies the part of the matrix A to be converted. = MagmaUpper: Upper triangular part = MagmaLower: Lower triangular part [in] n INTEGER The number of columns of the matrix A. n >= 0. [in] A COMPLEX_16 array, dimension (LDA,n) On entry, the n-by-n coefficient matrix A. [in] lda INTEGER The leading dimension of the array A. LDA >= max(1,n). [out] SA COMPLEX array, dimension (LDSA,n) On exit, if INFO=0, the n-by-n coefficient matrix SA; if INFO > 0, the content of SA is unspecified. [in] ldsa INTEGER The leading dimension of the array SA. LDSA >= max(1,n). [out] info INTEGER = 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 COMPLEX overflow threshold, in this case, the content of SA on exit is unspecified. [in] queue magma_queue_t Queue to execute in.