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Jcc jump conditionally jcc – Motorola DSP96002 User Manual

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A - 192

DSP96002 USER’S MANUAL

MOTOROLA

Jcc

Jump Conditionally

Jcc

Operation:

If cc, then xx

PC

else PC + 1

PC

If cc, then ea

PC

else PC + 1

PC

Assembler Syntax:

Jcc label (short)

Jcc ea

Description:

If the specified condition is true, program execution continues at a location specified by an effective ad-

dress in the instruction. If the specified condition is false, the PC is incremented and the effective address

is ignored. However, the address register specified in the effective address field is always updated inde-

pendently of the condition. All memory alterable addressing modes may be used for the effective address.

A Fast Short Jump addressing mode may also be used. The 15-bit data is sign extended to form the ef-

fective address. See Section A.10 for restrictions.

"cc" may specify the following conditions:

Mnemonic

Condition

CC (HS) - carry clear (higher or same)

C = 0

CS (LO) - carry set (lower)

C = 1

EQ

- equal

Z = 1

GE

- greater or equal

N && V = 0

GT

- greater than

Z v (N && V) = 0

HI

- higher

Z v C = 0

LE

- less or equal

Z v (N && V) = 1

LS

- lower or same

Z v C = 1

LT

- less than

N && V = 1

MI

- minus

N = 1

NE(Q)

- not equal

Z = 0

PL

- plus

N = 0

VC

- overflow clear

V = 0

VS

- overflow set

V = 1

CCR Condition Codes: Not affected.

ER Status Bits: Not affected.

IER Flags: Not affected.