Intel 80287, 80286 manual Programming Numeric Applications Fdecstp, Fdivp, Fdivr

PROGRAMMING NUMERIC APPLICATIONS

FDECSTP

Operands

(no operands)

FDIV

Operands

//ST(i),ST

short·real long-real

FDIVP

Operands

ST(i),ST

FDIVR

Operands

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

FDiVnF

Operands

ST(i),ST

Table 2-14. Instruction Set Reference Data (Cont'd.)

FDECSTP (no operands)			Exceptions: None
Decrement stack pointer
Execution Clocks		Operand Word	Code
				Coding Example
Typical	Range	Transfers	Bytes
9	6-12	0	2	FDECSTP
FDIV //source/destination,source			Exceptions: I, D, Z, 0, U, P
Divide real
Execution Clocks		Operand Word	Code
				Coding Example
Typical	Range	Transfers	Bytes
198	193-203	0	2	FDIV
220	215-225	2	2-4	FDIV DISTANCE
225	220-230	4	2-4	FDIV ARC [DI]
FDIVP destination, source			Exceptions: I, D, Z, 0, U, P
Divide real and pop
Execution Clocks		Operand Word	Code
				Coding Example
Typical	Range	Transfers	Bytes
202	197-207	0	2	FDIVP ST(4),ST
FDIVR //source/destination, source			Exceptions: I, D, Z, 0, U, P
Divide real reversed
Execution Clocks		Operand Word	Code
				Coding Example
Typical	Range	Transfers	Bytes
199	194-204	0	2	FDIVR ST(2),ST
221	216-226	2	2·4	FDIVR [8X].PULSE_RATE
226	221-231	4	2-4	FDIVR RECORDER.FREQUENCY
i=iirv"nr uestiiiCitiCiii, SvuiGo			Exceptions: I, D, Z, 0, U, P
Divide real reversed and pop
Execution Clocks		Operand Word	Code
				Coding Example
Typical	Range	Transfers	Bytes
203	198-208	0	2	FDIVRP ST(1 ),ST

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