mc68ec060 Freescale Semiconductor, Inc, mc68ec060 Datasheet - Page 128

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

Floating-Point Unit
6-10
Sign (s)
Biased Exponent (e)
Zero, Reserved (u)
Explicit Integer Bit (j)
Mantissa (f)
Total
Input
Output
Positive Mantissa
Negative Mantissa
Bias of Biased Exponent
Range of Biased Exponent
Explicit Integer Bit
Range of Mantissa
Mantissa (Explicit Integer Bit and Fraction)
Relation to Representation of Real Numbers
Biased Exponent Format Minimum
Bias of Biased Exponent
Explicit Integer Bit
Range of Mantissa
Mantissa (Explicit Integer Bit and Fraction)
Relation to Representation of Real Numbers
Biased Exponent Format Minimum
Mantissa (Explicit Integer Bit and Fraction)
Biased Exponent Format Maximum
Explicit Integer Bit
Mantissa (Explicit Integer Bit and Fraction)
Sign
Explicit Integer Bit
Biased Exponent Format Maximum
Mantissa
Representation of Mantissa
Table 6-6. Extended-Precision Real Format Summary
Nonsignaling
Signaling
Nonzero Bit Pattern Created by User
Mantissa When Created by FPU
95 94
s
e
80 79
Interpretation of Unused Bits
M68060 USER’S MANUAL
u
Denormalized Numbers
Interpretation of Sign
Normalized Numbers
64
Field Size (in Bits)
Signed Infinities
63
Signed Zeros
Data Format
j
62
NANs
f
0 < = e < 32767 ($7FFF)
(–1) s 2 e–16383 j.f
1.11111…1111
(–1) s 2 –16383 0.f
32767 ($7FFF)
x.1xxxx…xxxx
x.0xxxx…xxxx
x.xxxxx…xxxx
+16383 ($3FFF)
+16383 ($3FFF)
Zero or Nonzero
32767 ($7FFF)
Don’t Care
Don’t Care
x.000…0000
Nonzero
Don’t Care
Don’t Care
0 ($0000)
0 ($0000)
All Zeros
Nonzero
s = 0
s = 1
0.0
15
16
63
96
1.f
0.f
1
1
1
0
0
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