Performs modified Givens rotation of points in the plane.
void cblas_srotm (const MKL_INT n, float *x, const MKL_INT incx, float *y, const MKL_INT incy, const float *param);
void cblas_drotm (const MKL_INT n, double *x, const MKL_INT incx, double *y, const MKL_INT incy, const double *param);
Given two vectors x and y, each vector element of these vectors is replaced as follows:
for i=1 to n, where H is a modified Givens transformation matrix whose values are stored in the param through param array. See discussion on the param argument.
Specifies the number of elements in vectors x and y.
Array, size at least (1 + (n -1)*abs(incx)).
Specifies the increment for the elements of x.
Array, size at least (1 + (n -1)*abs(incy)).
Specifies the increment for the elements of y.
Array, size 5.
The elements of the param array are:
param contains a switch, flag. param[1-4] contain h11, h21, h12, and h22, respectively, the components of the array H.
Depending on the values of flag, the components of H are set as follows:
flag = -1.0:
flag = 0.0:
flag = 1.0:
flag = -2.0:
In the last three cases, the matrix entries of 1.0, -1.0, and 0.0 are assumed based on the value of flag and are not required to be set in the param vector.
Each element x[i] is replaced by h11*x[i] + h12*y[i].
Each element y[i] is replaced by h21*x[i] + h22*y[i].