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Altera_Forum
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9 years ago

Difference in floating point and fixed point arithmetic in vhdl.

Hiii... I want to know the difference between floating point and fixed point arithmetic.I searched it on google but I didnt get a clear idea when to use which type of arithematic. Can any one pl...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
9 years ago

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To me the main issue is that floating point is used for critical few cases especially when small value representation is treated fairly.

The drawback of fixed point is the unfair representation of small values which will occupy few LSBs and waste many MSBs.

For example with 8 bits unsigned the difference between 200 and 201 can be represented i.e. 1/200 is represented.But we can't pass same representation to lower values such as 1/200 of 3

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Thank you every one for your response...It really helped.