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Jsclr jump to subroutine if bit clear jsclr – Motorola DSP96002 User Manual

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DSP96002 USER’S MANUAL

MOTOROLA

JSCLR

Jump to Subroutine if Bit Clear

JSCLR

Operation:

If S{n} = 0,
then PC

SSH; SR

SSL; xxxx

PC

else PC + 1

PC

If S{n} = 0,
then PC

SSH; SR

SSL; xxxx

PC

else PC + 1

PC

If S{n} = 0,
then PC

SSH; SR

SSL; xxxx

PC

else PC + 1

PC

If S{n} = 0,
then PC

SSH; SR

SSL; xxxx

PC

else PC + 1

PC

If S{n} = 0,
then PC

SSH; SR

SSL; xxxx

PC

else PC + 1

PC

If S{n} = 0,
then PC

SSH; SR

SSL; xxxx

PC

else PC + 1

PC

If S{n} = 0,
then PC

SSH; SR

SSL; xxxx

PC

else PC + 1

PC

Assembler Syntax:

JSCLR #bit,X: ea, label

JSCLR #bit,X: aa, label

JSCLR #bit,X: pp, label

JSCLR #bit,Y: ea, label

JSCLR #bit,Y: aa, label

JSCLR #bit,Y: pp, label

JSCLR #bit,S,label

Description:

The nth bit in the source operand is tested. If the tested bit is zero, the address of the instruction immedi-

ately following the JSCLR instruction and the status register are pushed onto the stack. Program execu-

tion then continues at a location specified by a 32-bit absolute address in the extension word of the instruc-

tion. Otherwise, the PC is incremented and the extension word is ignored. However, the address register

specified in the effective address field is always updated independently of the condition. All memory alter-

able addressing modes may be used for the source operand. Absolute Short, I/O Short and Register Di-

rect addressing modes may also be used. The bit to be tested is selected by an immediate bit number 0-

31. See Section A.10 for restrictions. Note that if the specified source operand S is the SSH, the stack

pointer register will be decremented by one; if the condition is true, the push operation will write over the

stack level where the SSH value was taken.

CCR Condition Codes: Not affected.

ER Status Bits: Not affected.

IER Flags: Not affected.

Instruction Fields: