Function rgsl::blas::level2::ssyr2

pub fn ssyr2(
    uplo: CblasUplo, 
    alpha: f32, 
    x: &VectorF32, 
    y: &VectorF32, 
    A: &mut MatrixF32
) -> Value

These functions compute the symmetric rank-2 update A = \alpha x y^T + \alpha y x^T + A of the symmetric matrix A. Since the matrix A is symmetric only its upper half or lower half need to be stored. When Uplo is CblasUpper then the upper triangle and diagonal of A are used, and when Uplo is CblasLower then the lower triangle and diagonal of A are used.