dasum daxpy dcopy ddot dnrm2 drot drotg drotm drotmg dscal dswap

dswap() void dswap ( int  n, double  x[], int  incx, double  y[], int  incy  ) y <-> x (BLAS 1) Purpose This routine interchanges two vectors. Parameters [in] n Number of elements in vectors x and y. (If n <= 0, returns without computation) [in,out] x[] Array x[lx] (lx >= 1 + (n - 1)*abs(incx)) [in] Input vector x. [out] Output vector. (= input vector y) [in] incx Storage spacing between elements of x. [in,out] y[] Array y[ly] (ly >= 1 + (n - 1)*abs(incy)) [in] Input vector y. [out] Output vector. (= input vector x) [in] incy Storage spacing between elements of y. Reference BLAS