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AMD-K6-2E/233AMZ Datasheet(PDF) 46 Page - Advanced Micro Devices

Part # AMD-K6-2E/233AMZ
Description  AMD-K6??2E Embedded Processor
PDF  332 Pages
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Manufacturer  AMD [Advanced Micro Devices]
Direct Link  http://www.amd.com
Logo AMD - Advanced Micro Devices

AMD-K6-2E/233AMZ Datasheet(HTML) 46 Page - Advanced Micro Devices

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28
Software Environment
Chapter 3
AMD-K6™-2E Processor Data Sheet
22529B/0—January 2000
Preliminary Information
The eight floating-point registers are physically 80 bits wide
and labeled FPR0–FPR7. Figure 11 shows the format of these
floating-point registers. See “Floating-Point Register Data
Types” on page 30 for information on allowable floating-point
data types.
Figure 11. Floating-Point Register
The 16-bit FPU status word register contains information about
the state of the floating-point unit. Figure 12 shows the format
of the FPU status word register.
Figure 12. FPU Status Word Register
64 63
0
78
79
Sign
Exponent
Significand
9 8
7
654
3210
10
11
12
13
14
15
P
E
O
E
E
S
C
0
C
1
I
E
Z
E
U
E
S
F
TOSP
C
3
B
C
2
D
E
Symbol
Description
Bits
BFPU Busy
15
C3
Condition Code
14
TOSP
Top of Stack Pointer
13–11
C2
Condition Code
10
C1
Condition Code
9
C0
Condition Code
8
ES
Error Summary Status
7
SF
Stack Fault
6
Exception Flags
PE
Precision Error
5
UE
Underflow Error
4
OE
Overflow Error
3
ZE
Zero Divide Error
2
DE
Denormalized Operation Error 1
IE
Invalid Operation Error
0
TOSP Information
000 = FPR0
111 = FPR7



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