Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

VHDL Numeric Type Conversion

I am using a bunch of variables to do some math. These variables, X and Y coordinates, are converted to different numeric types for ease of math operations. The outputs, Xm and Ym, are SLV's and depe...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

I didn't calculate the expectable Xp result, but I think, it can't be -138272. In the expression Xc1 := (d4 - d2), d4 and d2 are both of the natural type, so (d4-d2) causes an overflow but doesn't have a negative result.