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The diffences between unsigned.all, numeric.all and arith.all (VHDL)

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anantha_09

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can any one let me know the diffences between unsigned.all, numeric.all and arith.all?

when to use which package? and what would be the implications

Thanks
Anantha
 

Re: vhdl packages

If the operands of STD_LOGIC type, one has to use .arith package which is provided by IEEE to perform any arithmetic operations ( In the package they defined resolve when the operands taking other than '0' and '1')

Eg if X = z; Y = x; then if RESULT = X * Y; then what will u expect for the output
 

Re: vhdl packages

but sometimes there is only type unsigned...
y this is written
is unsigned a package or type???????????????
 

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