floating point adder using dsp48 adder

[shanieme]

i have to make floating point adder using dsp48 adder
plz help me

 

[TrickyDicky]

why not use the floating point IP cores already provided by altera or xilinx?

 

[shanieme]

because prject assigned to me states that i have to make it using dsp48

 

[FvM]

because project assigned to me states that i have to make it using dsp48

You can be pretty sure, that the Xlinx float IP is using dsp48 internally. Unfortunately, nobody feels a need to design floating point IP on it's own, except he's working on a HDL programming course exercise.

I guess, we should translate your question into "please give me a behavioral floating point adder code" or "give me a structural code instantiating dsp48 blocks". Assuming, noone has it, or doesn't want to share his homework, you should refer to the basic definition of IEEE float format and write it from the scratch. If you're using VHDL, the IEEE float package should help you.