Intel 80287, 80286 manual ·14. Instruction Set Reference Data

FABS

Operands

(no operands)

FADD

Operands

//ST,ST(i)/ST(i),ST short-real long-real

FADDP

Operands

ST(i),ST

FBLD

Operands

packed-decimal

FBSTP

Operands

packed-decimal

PROGRAMMING NUMERIC APPLICATIONS

Table 2·14. Instruction Set Reference Data

FABS (no operands)			Exceptions: I
Absolute value
Execution Clocks		Operand Word	Code
					Coding Example
Typical	Range	Transfers	Bytes
14	10·17	0	2	FABS
FADD //source/destination,source			Exceptions: I, D, 0, U, P
Add real
Execution Clocks		Operand Word	Code
					Coding Example
Typical	Range	Transfers	Bytes
85	70-100	0	2	FADD	ST,ST(4)
105	90-120	2	2-4	FADD	AIR_TEMP [SI]
110	95-125	4	2-4	FADD [BX].MEAN
	..
FADDP destination, source			Exceptions: I, D, 0, U, P
Add real and pop
Execution Clocks		Operand Word	Code
					Coding Example
Typical	Range	Transfers	Bytes
90	75-105	0	2	FADDP ST(2),ST
FBLD source			Exceptions: I
Packed decimal (BCD) load
Execution Clocks		Operand Word	Code
					Coding Example
Typical	Range	Transfers	Bytes
300	290-310	5	2-4	FBLD YTD_SALES

FBSTP destination

Packed decimal (BCD) store and pop Exceptions: I

Execution Clocks

Operand Word CodeCoding Example

Typical Range Transfers Bytes

530 520-540 5 2-4 FBSTP [BX].FORECAST

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