(C|Z)HPR¶

Single complex and double complex HPR.

Description¶

Computes the packed hermitian rank-1 operation:

$A \assign \alpha x * \herm{x} + A$

BLAS Interface¶

void chpr(const char *UPLO, const qml_long *N, const float *ALPHA,
          const qml_single_complex *X, const qml_long *INCX,
          qml_single_complex *AP);

void zhpr(const char *UPLO, const qml_long *N, const double *ALPHA,
          const qml_double_complex *X, const qml_long *INCX,
          qml_double_complex *AP);

CBLAS Interface¶

void cblas_chpr(const CBLAS_ORDER ORDER, const CBLAS_UPLO UPLO, const qml_long N,
                const float ALPHA, const qml_single_complex *X,
                const qml_long INCX, qml_single_complex *AP);

void cblas_zhpr(const CBLAS_ORDER ORDER, const CBLAS_UPLO UPLO, const qml_long N,
                const double ALPHA, const qml_double_complex *X,
                const qml_long INCX, qml_double_complex *AP);

Arguments¶

UPLO	Specify whether the upper or lower triangle of matrix A will be used
N	Order of matrix A
ALPHA	Scalar multiplied with the vector-vector product
X	Input vector, must be at least: $(\fvar{N}-1)\mult\abs{\fvar{INCX}} + 1$
INCX	Distance between individual elements in X
AP	Matrix A stored in packed triangular form, must be at least: $\fvar{N}\mult(\fvar{N}+1)/2$