Intel 80C188XL Bound, Detect Value Out of Range, Call Procedure, Call procedure-name

		INSTRUCTION SET DESCRIPTIONS
	Table C-4. Instruction Set (Continued)
Name	Description	Operation	Flags
			Affected
BOUND	Detect Value Out of Range:	if	AF –
	BOUND dest, src	((dest) < (src) or (dest) > ((src) + 2)	CF –
		then	DF –
	Provides array bounds checking in
		(SP) ← (SP) – 2	IF –
	hardware. The calculated array index
		((SP) + 1 : (SP)) ← FLAGS	OF –
	is placed in one of the general purpose
		(IF) ← 0	PF –
	registers, and the upper and lower
		(TF) ← 0	SF –
	bounds of the array are placed in two
		(SP) ← (SP) – 2	TF –
	consecutive memory locations. The
		((SP) + 1 : (SP)) ← (CS)	ZF –
	contents of the register are compared
		(CS) ← (1EH)
	with the memory location values, and if
		(SP) ← (SP) – 2
	the register value is less than the first
		((SP) + 1 : (SP)) ← (IP)
	location or greater than the second
		(IP) ← (1CH)
	memory location, a trap type 5 is
	generated.
	Instruction Operands:
	BOUND reg, mem
CALL	Call Procedure:	if	AF –
	CALL procedure-name	Inter-segment	CF –
		then	DF –
	Activates an out-of-line procedure,
		(SP) ← (SP) – 2	IF –
	saving information on the stack to
		((SP) +1:(SP)) ← (CS)	OF –
	permit a RET (return) instruction in the
		(CS) ← SEG	PF –
	procedure to transfer control back to
		(SP) ← (SP) – 2	SF –
	the instruction following the CALL. The
		((SP) +1:(SP)) ← (IP)	TF –
	assembler generates a different type
		(IP) ← dest	ZF –
	of CALL instruction depending on
	whether the programmer has defined
	the procedure name as NEAR or FAR.
	Instruction Operands:
	CALL near-proc
	CALL far-proc
	CALL memptr16
	CALL regptr16
	CALL memptr32

NOTE: The three symbols used in the Flags Affected column are defined as follows:

–the contents of the flag remain unchanged after the instruction is executed ¸? the contents of the flag is undefined after the instruction is executed

the flag is updated after the instruction is executed

C-7