Intel 80286

PROGRAMMING NUMERIC APPLICATIONS
Table 2-14. Instruction Set Reference Data (Cont'd.)
FMUL
FMUL //source/destination,source
Exceptions:
I, D, 0, U, P
Multiply real
Execution Clocks
Operands
Operand Word Code
Coding Example
Typical Range
Transfers
Bytes
//ST(i),ST /ST,ST(j)1
97
90-105
0
2 FMUL ST,ST(3)
//ST(i),ST /ST,ST(i)
138 130-145
0
2 FMUL ST,ST(3)
short-real 118 110-125 2 2-4 FMUL SPEED_FACTOR
long-reaP 120 112-126 4 2-4 FMUL [BPj.HEIGHT
long-real
161 154-168 4 2-4 FMUL [BPj.HEIGHT
FMULP FMULP destination, source
Exceptions:
I, D, 0, U, P
Multiply real and pop
Execution Clocks
Operands
Operand Word
Code
Coding Example
Typical Range
Transfers Bytes
ST(i),ST1
100 94-108
0
2 FMULP ST(1),ST
ST(i),ST 142 134-148
0
2 FMULP ST(1),ST
FNOP FNOP (no operands)
Exceptions: None
No operation
Execution
Clocks
Operands
Operand Word
Code
Coding
Example
Typical Range
Transfers Bytes
(no operands) 13
10-16
0
2 FNOP
FPATAN
FPATAN (no operands)
Exceptions:
U, P (operands not checked)
Partial arctangent
Execution Clocks
Operands
Operand Word
Code
Coding Example
Typical Range
Transfers Bytes
(no operands)
650
250-800
0
2 FPATAN
FPREM
FPREM (no operands)
Exceptions:
I, D, U
Partial remainder
Execution Clocks
Operands
Operand Word Code
Coding Example
Typical Range
Transfers
Bytes
(no operands) 125
15-190
0
2 FPREM
2-32
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