HDL Coder giving Conformance error due to fi division

Hi,

I am trying to convert a matlab code to HDL using the HDL coder.

In my matlab file the following lines

NP_b = bitand(bitshift(uint16(16384), -6), 3);
full_bits = 2;
np_b=1/full_bits^(NP_b+1);

are converted to fixed point equivalent of

fm = fimath('RoundingMethod', 'Nearest', 'OverflowAction', 'Wrap', 'ProductMode', 'SpecifyPrecision', 'SumMode', 'FullPrecision', 'ProductWordLength', 32, 'ProductFractionLength', 30);

np_b = fi(fi_div(fi(1, 0, 1, 0, fm), full_bits^(NP_b + 1)), 0, 1, 0, fm);

function c = fi_div(a,b)
coder.inline( 'always' );
if isfi( a ) && isfi( b )
    a1 = fi( a, 'RoundMode', 'fix' );
    b1 = fi( b, 'RoundMode', 'fix' );
    c1 = divide( divideType( a1, b1 ), a1, b1 );
    c = fi( c1, numerictype( c1 ), fimath( a ) );
else
    c = a/b;
end
end

At the HDL code generation step there is an error that is thrown, which says "Found an unsupported unbounded loop structure. This loop may be user written or automatically generated due to the use of specific vector expressions or functions."

Could any of you kindly help me with this error please?

[Shruthi Sampathkumar]

Hi Varuna,

I've the same error. Could you resolve it?

Thanks, Shruthi Sampathkumar.

[Walter Roberson]

That seems a rather round-about way of writing

np_b = 1/2;

??

Answer 1

[Kiran Kintali]

Without dut.m and testbench.m files and a MATLAB HDL Coder project it woudl be difficult to do further analysis.

running the following code through fixed-point conversion does not product any error