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DerekChiou_EE306_Spring2009_Lecture5_afterLecture

# DerekChiou_EE306_Spring2009_Lecture5_afterLecture - Real...

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© Derek Chiou 306: Logical Equations and Gates Prof. Derek Chiou University of Texas at Austin

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2/4/2009 © Derek Chiou : EE306: Lecture 5 Recap Review floating point Discuss ASCII Subtracting Logical Equations Outline Floating point with an exponent of all 1s Truth tables to logical equations Continuing with gates
Clarification Positive numbers in all representations (signed  magnitude, 1s complement, 2s complement) 2/4/2009 © Derek Chiou : EE306: Lecture 5

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Floating Point Details 2/4/2009 © Derek Chiou : EE306: Lecture 5 S Exponent Mantissa (fraction) 1 8 23 If (1<=exponent<=254) then N = (-1) S * 1.fraction * 2 exponent-127 If (exponent == 0) then N = (-1) S * 0.fraction * 2 -126 If ((exponent == 255) AND (fraction==0) then N = (-1) S * infinity If ((exponent == 255) AND (MSB(fraction)==1) then N = QNaN If ((exponent == 255) AND (MSB(fraction)==0) then N = SNaN
OR Gate 2/4/2009 © Derek Chiou : EE306: Lecture 5

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Real OR Gate 2/4/2009 © Derek Chiou : EE306: Lecture 5

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