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C-21
INSTRUCTION SET DESCRIPTIONS
JAE
JNB
Jump on Above or Equal:
Jump on Not Below:
JAE
disp8
JNB
disp8
Transfers control to the target location
if the tested condition (CF = 0) is true.
Instruction Operands:
JAE short-label
JNB short-label
if
(CF) = 0
then
(IP) ← (IP) + disp8 (sign-ext to 16 bits)
AF –
CF –
DF –
IF –
OF –
PF –
SF –
TF –
ZF –
JB
JNAE
Jump on Below:
Jump on Not Above or Equal:
JB
disp8
JNAE
disp8
Transfers control to the target location
if the tested condition (CF = 1) is true.
Instruction Operands:
JB short-label
JNAE short-label
if
(CF) = 1
then
(IP) ← (IP) + disp8 (sign-ext to 16 bits)
AF –
CF –
DF –
IF –
OF –
PF –
SF –
TF –
ZF –
JBE
JNA
Jump on Below or Equal:
Jump on Not Above:
JBE
disp8
JNA
disp8
Transfers control to the target location
if the tested condition ((C =1) or
(ZF=1)) is true.
Instruction Operands:
JBE short-label
JNA short-label
if
((CF) = 1) or ((ZF) = 1)
then
(IP) ← (IP) + disp8 (sign-ext to 16 bits)
AF –
CF –
DF –
IF –
OF –
PF –
SF –
TF –
ZF –
JC Jump on Carry:
JC
disp8
Transfers control to the target location
if the tested condition (CF=1) is true.
Instruction Operands:
JC short-label
if
(CF) = 1
then
(IP) ← (IP) + disp8 (sign-ext to 16 bits)
AF –
CF –
DF –
IF –
OF –
PF –
SF –
TF –
ZF –
Table C-4. Instruction Set (Continued)
Name Description Operation
Flags
Affected
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