Expressible Numbers.

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Presentation transcript:

Expressible Numbers

Density of Floating Point Numbers

IEEE 754 Standard for floating point storage 32 and 64 bit standards 8 and 11 bit exponent respectively Extended formats (both mantissa and exponent) for intermediate results

IEEE 754 Formats

FP Arithmetic +/- Check for zeros Align significands (adjusting exponents) Add or subtract significands Normalize result

FP Addition & Subtraction Flowchart

FP Arithmetic x/ Check for zero Add/subtract exponents Multiply/divide significands (watch sign) Normalize Round All intermediate results should be in double length storage

Floating Point Multiplication

Floating Point Division

Required Reading Stallings Chapter 9 IEEE 754 on IEEE Web site