Symbolic	Operation	Flags Affected	Operand Types
adc srce,dest	add with carry, dest=dest+srce+CF	AF,CF,OF,PF,SF,ZF	mem,reg; reg,mem; reg,reg; imm,reg; imm,mem
add srce,dest	addition, dest=dest+srce	AF,CF,OF,PF,SF,ZF	mem,reg; reg,mem; reg,reg; imm,reg; imm,mem
and srce,dest	bitwise and, dest = dest and srce	PF,SF,ZF,CF=0,OF=0	mem,reg; reg,mem; reg,reg; imm,reg; imm,mem
call label	save return address on SS, jump to target	none	label
cbw	convert byte to word, extend sign of AL into AH	none	none
cdq	convert double to quad, EAX to EDX/EAX	none	none
clc	clear carry flag	CF=0	none
cmc	complement carry flag	CF = 1 - CF	none
cmp srce,dest	temp = dest - srce, set flags	AF,CF,OF,PF,SF,ZF	mem,reg; reg,mem; reg,reg; imm,reg; imm,mem
cwd	convert word to double, extend sign of AX into DX	none	none
cwde	convert word AX to double EAX, extend sign	none	none
dec dest	decrement, dest = dest - 1	AF,OF,PF,SF,ZF	mem; reg;
hlt	stop CPU execution	none	none
idiv srce	signed divide, AL = AX / srce, AX = DX:AX / srce, EAX = EDX:EAX / srce	PF,SF,ZF,AF,CF,OF	mem; reg
imul srce,dest	signed multiply, dest = dest * srce	PF,SF,ZF,AF,CF,OF	mem,reg; reg,reg; imm,reg
inc dest	increment, dest = dest + 1	AF,OF,PF,SF,ZF	mem; reg;
int	save flags, call interrupt handler	IF=0, TF=0	none
into	interrupt on overflow, interrupt if CF=1	IF=0, TF=0	none
ja label	jump if above, CF=0 and ZF=0	none	label
jae label	jump if above or equal, CF=0	none	label
jb label	jump if below, CF=1	none	label
jbe label	jump if below or equal, CF=1 or ZF=1	none	label
jc label	jump if carry, CF=1	none	label
jcxz label	jump if CX register is zero	none	label
jecxz label	jump if ECX register is zero	none	label
je label	jump if equal, ZF=1	none	label
jg label	jump if greater, ZF=0 and SF=OF	none	label
jge label	jump if greater or equal, SF=OF	none	label
jl label	jump if less, SF<>OF	none	label
jle label	jump if less or equal, ZF=1 or SF<>OF	none	label
jmp label	unconditonal jump to label	none	label
jna label	jump if not above, CF=1 or ZF=1	none	label
jnae label	jump if not above or equal, CF=1	none	label
jnb label	jump if not below, CF=0	none	label
jnbe label	jump if not below or equal, CF=0 and ZF=0	none	label
jnc label	jump if not carry, CF=0	none	label
jne label	jump if not equal, ZF=0	none	label
jng label	jump if not greater, ZF=1 or SF<>OF	none	label
jnge label	jump if not greater or equal, SF<>OF	none	label
jnl label	jump if not less, SF=OF	none	label
jnle label	jump if not less or equal, ZF=0 and SF=OF	none	label
jno label	jump if not overflow, OF=0	none	label
jnp label	jump if not parity, PF=0	none	label
jns label	jump if not sign, SF=0	none	label
jnz label	jump if not zero, ZF=0	none	label
jo label	jump if overflow, OF=1	none	label
jp label	jump if parity, PF=1	none	label
jpe label	jump if parity even, PF=1	none	label
jpo label	jump if parity odd, PF=0	none	label
js label	jump if sign, SF=1	none	label
jz label	jump if zero, ZF=1	none	label
lahf	load flags into AH	AH = SF,ZF,-,AF,-,PF,-,CF	none
lea srce,dest	effective memory address loaded into reg.	none	mem,reg
loop label	decrement CX, jump if CX != 0	none	label
mov srce,dest	move, dest = srce	none	mem,reg; reg,mem; reg,reg; imm,reg; imm,mem
movsx srce,dest	move s.p. to d.p, dest = srce, pad MSB with sign	none	mem,reg; reg,reg;
movzx srce,dest	move s.p. to d.p, dest = srce, pad MSB with 0	none	mem,reg; reg,reg;
neg dest	2's complement negate dest	AF,CF,OF,PF,SF,ZF	mem; reg;
nop	no operation	none	none
not dest	bitwise not, 1's complement dest	none	mem; reg;
or srce,dest	bitwise or, dest = dest or srce	PF,SF,ZF,CF=0,OF=0	mem,reg; reg,mem; reg,reg; imm,reg; imm,mem
pop dest	pop from stack to dest	none	mem; reg; (bytes not allowed)
popa	pop all AX,CX,DX,BX,SP,BP,SI,DI from stack	none	none
popad	pop all EAX,ECX,EDX,EBX,ESP,EBP,ESI,EDI	none	none
popf	pop word from stack to flags register	all	none
push dest	push dest onto stack	none	mem; reg; (bytes not allowed)
pusha	push all AX,CX,DX,BX,SP,BP,SI,DI onto stack	none	none
pushad	push all EAX,ECX,EDX,EBX,ESP,EBP,ESI,EDI	none	none
pushf	push flags register onto stack	none	none
rcl srce,dest	rotate dest left by srce bits through CF	CF,OF	imm,mem; imm,reg; %cl,mem; %cl,reg;
rcr srce,dest	rotate dest right by srce bits through CF	CF,OF	imm,mem; imm,reg; %cl,mem; %cl,reg;
ret ?	pop return address from stack, optionally increment SP	CF,OF	imm
rol srce,dest	rotate dest left by srce bits, into CF	CF,OF	imm,mem; imm,reg; %cl,mem; %cl,reg;
ror srce,dest	rotate dest right by srce bits, into CF	CF,OF	imm,mem; imm,reg; %cl,mem; %cl,reg;
sahf	store into flags SF,ZF,-,AF,-,PF,-,CF = AH	SF,ZF,AF,PF,CF	none
sar srce,dest	shift dest right by srce bits, into CF, sign replicated	CF,OF,PF,SF,ZF	imm,mem; imm,reg; %cl,mem; %cl,reg;
sal/shl srce,dest	shift dest left by srce bits, into CF, 0 pad	CF,OF,PF,SF,ZF	imm,mem; imm,reg; %cl,mem; %cl,reg;
shr srce,dest	shift dest right by srce bits, into CF, 0 pad	CF,OF,PF,SF,ZF	imm,mem; imm,reg; %cl,mem; %cl,reg;
sbb srce,dest	dest = dest - srce - CF	AF,CF,OF,PF,SF,ZF	mem,reg; reg,mem; reg,reg; imm,reg; imm,mem
stc	set carry flag, CF = 1	CF=1	none
sub srce,dest	dest = dest - srce	AF,CF,OF,PF,SF,ZF	mem,reg; reg,mem; reg,reg; imm,reg; imm,mem
test srce,dest	logical test, flags set for (dest and srce)	PF,SF,ZF,CF=0,OF=0	mem,reg; reg,reg; imm,reg; imm,mem
xchg srce,dest	swap dest with srce	none	mem,reg; reg,reg;
xor srce,dest	bitwise exclusive or, dest = dest xor srce	PF,SF,ZF,CF=0,OF=0	mem,reg; reg,mem; reg,reg; imm,reg; imm,mem

Don S. Bidulock
Department of Computer Science
University of Calgary
Calgary, Alberta
Canada T2N 1N4
Phone: 403 220-7689 Fax: 403 284-4707
email: dsb@cpsc.ucalgary.ca

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