Texas Instruments MSP430x1xx User Manual page 86

Instruction Set
JNC Jump if carry not set
JLO Jump if lower
Syntax JNC
JLO
if C = 0: PC + 2 × offset −> PC
Operation
if C = 1: execute following instruction
Description The status register carry bit (C) is tested. If it is reset, the 10-bit signed offset
contained in the instruction LSBs is added to the program counter. If C is set,
the next instruction following the jump is executed. JNC (jump if no carry/lower)
is used for the comparison of unsigned numbers (0 to 65536).
Status Bits Status bits are not affected.
Example The result in R6 is added in BUFFER. If an overflow occurs, an error handling
routine at address ERROR is used.
ADD
JNC
ERROR ......
......
......
......
CONT ......
......
......
Example Branch to STL 2 if byte STATUS contains 1 or 0.
CMP.B
JLO
......
RISC 16−Bit CPU
3-50
label
label
R6,BUFFER ; BUFFER + R6 −> BUFFER
CONT ; No carry, jump to CONT
; Error handler start
; Continue with normal program flow
#2,STATUS
STL2 ; STATUS < 2
; STATUS ≥ 2, continue here