Intel 80287 User Manual

PROGRAMMING NUMERIC APPLICATIONS
Table 2-14. Instruction Set Reference Data (Cont'd.)
FXCH
FXCH //destination
Exceptions: I
Exchange registers
Execution Clocks
Operands
Operand Word
Code
Coding Example
Typical
Range
Transfers Bytes
I/ST(i)
12
10-15
0
2 FXCH ST(2)
FXTRACT FXTRACT (no operands)
Exceptions: I
Extract exponent and significant
Execution Clocks
Operands
Operand Word
Code
Coding Example
Typical
Range
Transfers Bytes
(no operands) 50 27-55
0
2 FXTRACT
FYL2X
FYL2X (no operands)
Exceptions: P (operands not checked)
y. Log
2
X
Execution Clocks
Operands
Operand Word
Code
Coding Example
Typical
Range
Transfers Bytes
(no operands) 950 900-1100
0
2 FYL2X
FYL2XP1 FYL2XP1 (no operands)
Exceptions: P (operands not checked)
Y
.log
2
(X + 1)
Execution Clocks
Operands
Operand Word
Code
Coding Example
Typical Range
Transfers Bytes
(no operands)
850
700-1000
0 2 FYL2XP1
F2XM1
F2XM1 (no operands)
Exceptions:
U, P (operands not checked)
2x-1
Execution Clocks
Operands
Operand Word
Code
Coding Example
Typical Range
Transfers Bytes
(no operands)
500
310-630
0 2
F2XM1
2-37
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Intel 80287 Specifications

General

Brand	Intel
Model	80287
Category	Computer Hardware
Language	English