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How to use coder.unroll in a while loop

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Life is Wonderful
Life is Wonderful le 16 Août 2022
Commenté : Life is Wonderful le 16 Août 2022
Hi
I'm looking for a sample code of how to use "coder. unroll" in a while loop. I intend to perform a division operation and want to unroll the loop if I achieve the required accuracy level.
For example,
format long g
a = (4);
b = (6);
T = numerictype('Signed', true,...
'WordLength', 64,...
'FractionLength', 60);
quotient = divide(T,a,b)
quotient =
0.666666666666667
and I want to stop the division process when a certain fractional bit accuracy, say 0.6667, is reached.

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Walter Roberson
Walter Roberson le 16 Août 2022
coder.unroll() by itself cannot do that. coder,unroll() always unrolls the number of times given in the for loop. The loop limits do not need to be constant inside the function being unrolled, but if not then during the code generation phase, the limit must be given as a numeric constant. If you had two different limits that you wanted to unroll to, then you would have to generate code twice, once for each limit.
  6 commentaires
Walter Roberson
Walter Roberson le 16 Août 2022
I seem to recall that the CORDIC division algorithm stops early if it reaches its goal.
Life is Wonderful
Life is Wonderful le 16 Août 2022
Thank you very much for your kind assistance. !!

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