AMD-K6 AMD [Advanced Micro Devices], AMD-K6 Datasheet - Page 44

• Manufacturer Part Number: AMD-K6
• Description: AMD-K6 Processor
• Manufacturer: AMD [Advanced Micro Devices]

AMD-K6
Figure 10. Floating-Point Register
Figure 11. FPU Status Word Register
26
Sign
79
78
®
Symbol
B
C3
TOSP
C2
C1
C0
ES
SF
PE
UE
OE
ZE
DE
IE
Processor Data Sheet
Exponent
Precision Error
Underflow Error
Overflow Error
Zero Divide Error
Denormalized Operation Error 1
Invalid Operation Error
FPU Busy
Condition Code
Top of Stack Pointer
Condition Code
Condition Code
Condition Code
Error Summary Status
Stack Fault
000 = FPR0
111 = FPR7
Description
Exception Flags
TOSP Information
The eight floating-point registers are 80 bits wide and labeled
FPR0–FPR7. Figure 10 shows the format of these floating-point
registers. See “Floating-Point Register Data Types” on page 28
for information on allowable floating-point data types.
The 16-bit FPU status word register contains information about
the state of the floating-point unit. Figure 11 shows the format
of this register.
64 63
Preliminary Information
Software Environment
13–11
Bits
15
14
10
9
8
7
6
5
4
3
2
0
15
B
14
C
3
13
TOSP
12
11
10
C
2
C
1
9 8
Significand
C
0
7
E
S
6
S
F
5
P
E
U
4
E
O
3
E
20695H/0—March 1998
Z
E
2
D
1
E
0
E
I
Chapter 3
0