Merge branch 'revert-svd-zero-flush' into 'ivas-float-update'

#define SVD_MINIMUM_VALUE        1e-32f   /* minimum value                                                   */

#define CONVERGENCE_FACTOR       1.0e-04f /* factor for SVD convergence                                      */

#define SVD_MAX_NUM_ITERATION    75       /* maximum number of interations before exiting the SVD            */

#define SVD_ZERO_FLUSH_THRESHOLD 0.0f

#define SVD_ZERO_FLUSH_THRESHOLD 1.0e-20f

#else

#define SVD_MINIMUM_VALUE        1e-32f          /* minimum value                                                   */

#define CONVERGENCE_FACTOR       1.19209290e-07f /* factor for SVD convergence                                      */