Benchmark numbers are available by architecture under the product family landing page.

  C67x: http://focus.ti.com/dsp/docs/dspplatformscontentaut.tsp?sectionId=2&familyId=327&tabId=499
C674x: http://focus.ti.com/dsp/docs/dspplatformscontento.tsp?sectionId=2&familyId=1622&tabId=2431
C647x: http://focus.ti.com/dsp/docs/dspplatformscontento.tsp?sectionId=2&familyId=1635&tabId=2432
C645x: http://focus.ti.com/dsp/docs/dspplatformscontento.tsp?sectionId=2&familyId=1397&tabId=497
  C64x: http://focus.ti.com/dsp/docs/dspplatformscontentaut.tsp?sectionId=2&familyId=477&tabId=496

It doesn't have 2048 or more points, can I modify existing code according to mine requiremant ?

You should be able to.  The device product folders have links to the software libraries with source code.