Maxim-integrated MAXQ622 Manual do Utilizador descarregar pdf (Página 218)

MAXQ612/MAXQ622 User’s Guide

16-8 Maxim Integrated

{L/S} JUMP C/{L/S} JUMP NC, src

{L/S} JUMP Z/{L/S} JUMP NZ, src

{L/S} JUMP E/{L/S} JUMP NE, src

{L/S} JUMP S, src

Conditional {Long/Short} Jump on Status Flag

Description:

Performs conditional branching based upon the state of a specific processor status flag. JUMP C

results in a branch if the Carry flag is set while JUMP NC branches if the Carry flag is clear. JUMP

Z results in a branch if the Zero flag is set while JUMP NZ branches if the Zero flag is clear. JUMP E

results in a branch if the Equal flag is set while JUMP NE branches if the Equal flag is clear. JUMP

S results in a branch if the Sign flag is set. Program branches can be relative or absolute depending

upon the src specifier and may be qualified by using the ‘L’ or ‘S’ prefixes as documented in the

JUMP src opcode. Special src restrictions apply to JUMP E and JUMP NE.

Status Flags:

None

JUMP C

Operation:

C=1: IP ← IP + src (relative) –or— src (absolute)

C=0: IP ← IP + 1

Encoding:

f010

1100 ssss ssss

Example(s):

JUMP C, label1 ; C=0, branch not taken

JUMP NC

Operation:

C=0: IP ← IP + src (relative) –or— src (absolute)

C=1: IP ← IP +1

Encoding:

f010

1100 ssss ssss

Example(s):

JUMP NC, label1 ; C=0, branch taken

JUMP Z

Operation:

Z=1: IP ← IP + src

Z=0: IP ← IP + 1

Encoding:

f001

1100 ssss ssss

Example(s):

JUMP Z, label1 ; Z=1, branch taken

JUMP NZ

Operation:

Z=0: IP ← IP + src (relative) –or— src (absolute)

Z=1: IP ← IP + 1

Encoding:

f101

1100 ssss ssss

Example(s):

JUMP NZ, label1 ; Z=1, branch not taken

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