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Altera_Forum's avatar
Altera_Forum
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11 years ago

to_float() "right bound of range must be a constant" error

I'm using Quartus 7.2. When trying to compile this piece of code: variable denum : integer; variable num : integer; variable dividend : float (4 downto -27); ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

For loops must have constant bounds. loops are unrolled during compile time into parrallel hardware so cannot change during run time.

but the bigger problems are:

1. Why are you using the float package? do you realise that by using this you will have almost no pipelining and your max frequency will be really realy bad? you need to use the altera float IP cores instead.

2. Why are you using the 7 year old quartus 7?