mc68ec060 Freescale Semiconductor, Inc, mc68ec060 Datasheet - Page 126

• Manufacturer Part Number: mc68ec060
• Description: Mc68060 Superscalar 68k Microprocessor Including The Lc060 And Ec060
• Manufacturer: Freescale Semiconductor, Inc

Floating-Point Unit
6-8
Sign (s)
Biased Exponent (e)
Fraction (f)
Total
Positive Fraction
Negative Fraction
Bias of Biased Exponent
Range of Biased Exponent
Range of Fraction
Fraction
Relation to Representation of Real Numbers
Biased Exponent Format Minimum
Bias of Biased Exponent
Range of Fraction
Fraction
Relation to Representation of Real Numbers
Biased Exponent Format Minimum
Fraction
Biased Exponent Format Maximum
Fraction
Sign
Biased Exponent Format Maximum
Fraction
Representation of Fraction
Maximum Positive Normalized
Minimum Positive Normalized
Minimum Positive Denormalized
Nonsignaling
Signaling
Nonzero Bit Pattern Created by User
Fraction When Created by FPU
Table 6-4. Single-Precision Real Format Summary
31 30
s
M68060 USER’S MANUAL
Denormalized Numbers
e
Interpretation of Sign
Normalized Numbers
Approximate Ranges
23 22
Field Size In Bits
Signed Infinities
Signed Zeros
Data Format
NANs
f
(–1) s
(–1) s
0 < e < 255 ($FF)
Zero or Nonzero
11111…1111
1xxxx…xxxx
0xxxx…xxxx
xxxxx…xxxx
1.2
1.4
0
+127 ($7F)
+126 ($7E)
Don’t Care
3.4
255 ($FF)
255 ($FF)
Nonzero
Nonzero
0.f = 0.0
0.f = 0.0
0 ($00)
0 ($00)
s = 0
s = 1
2 e–127
2 –126
23
32
1.f
0.f
1
8
10 –38
10 –45
10 38
0.f
1.f
MOTOROLA