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Individual Instruction Descriptions
4-112
Syntax DescriptionAlternate
Instruction
JRNLZP
pma16
[,
Rmod
] Conditional jump on R
x
≥ 0 after post-mod
JRZP
pma16
[,
Rmod
] Conditional jump on R
x
= 0 after post-mod
JRNZP
pma16
[,
Rmod
] Conditional jump on R
x
≠ 0 after post-mod
JS
pma16
[,
Rmod
] Conditional jump on SF = 1
JNS
pma16
[,
Rmod
] Conditional jump on SF = 0
JTAG
pma16
[,
Rmod
] Conditional jump on TAG = 1
JNTAG
pma16
[,
Rmod
] Conditional jump on TAG = 0
JTF1
pma16
[,
Rmod
] Conditional jump on TF1 = 1
JNTF1
pma16
[,
Rmod
] Conditional jump on TF1 = 0
JTF2
pma16
[,
Rmod
] Conditional jump on TF2 = 1
JNTF2
pma16
[,
Rmod
] Conditional jump on TF2 = 0
JXG
pma16
[,
Rmod
] JXNLE Conditional jump on transfer greater (signed)
†
JXNG
pma16
[,
Rmod
] JXLE Conditional jump on transfer not greater (signed)
†
JXS
pma16
[,
Rmod
] Conditional jump on transfer SF = 1
JXNS
pma16
[,
Rmod
] Conditional jump on transfer SF = 0
JXZ
pma16
[,
Rmod
] Conditional jump on transfer ZF = 1 (zero)
JXNZ
pma16
[,
Rmod
] Conditional jump on transfer ZF = 0 (not equal)
JZ
pma16
[,
Rmod
] Conditional jump on ZF = 1
JNZ
pma16
[,
Rmod
] Conditional jump on ZF = 0
†
Alternate mnemonics are provided as a way of improving source code readability. They generate the same opcode as the
original mnemonic. For example, JA (jump above) tests the same conditions as JNBE (jump not below or equal) but may have
more meaning in a specific section of code.
See Also JMP, CALL, C
cc
Example 4.14.27.1 JNZ 0x2010
Jump to program memory location 0x2010 if the result is not zero.
Example 4.14.27.2 JE 0x2010, R3++R5
Jump to program memory location 0x2010 if flag RZF = 1. Increment R3 by R5. Since this jump
instruction does not have a P at the end, post-modification is NOT reflected in the STAT register. Thus,
if R3 becomes zero, RZF is not updated.
Example 4.14.27.3 JIN1 0x2010, R1––
Jump to program memory location 0x2010 if I/O port address PD
0
pin has a value of 1. Decrement R1
by 2.
Example 4.14.27.4 JTAG 0x2010, R2++
Jump to program memory location 0x2010 if TAG bit of STAT is zero. Increment R2 by 2.