ADSP-21020TG-120 datasheet(7/32 Pages) AD

Part #	ADSP-21020TG-120

Description	32/40-Bit IEEE Floating-Point DSP Microprocessor

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Manufacturer	AD [Analog Devices]

Direct Link	http://www.analog.com

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ADSP-21020

REV. C

–7–

COMPUTE AND MOVE OR MODIFY INSTRUCTIONS

1.

compute,

|DM(Ia, Mb) = dreg1| ,

|PM(Ic, Md) = dreg2| ;

|dreg1 = DM(Ia, Mb)||dreg2 = PM(Ic, Md)|

2.

IF condition

compute;

3a.

IF condition

compute,

|DM(Ia, Mb)| = ureg ;

|PM(Ic, Md) |

3b.

IF condition

compute,

|DM(Mb, Ia)| = ureg ;

|PM(Md, Ic) |

3c.

IF condition

compute,

ureg =

|DM(Ia, Mb)| ;

|PM(Ic, Md) |

3d.

IF condition

compute,

ureg =

|DM(Mb, Ia)| ;

|PM(Md, Ic) |

4a.

IF condition

compute,

|DM(Ia, <data6>)| = dreg ;

|PM(Ic, <data6>) |

4b.

IF condition

compute,

|DM(<data6>, Ia)| = dreg ;

|PM(<data6>, Ic) |

4c.

IF condition

compute,

dreg =

|DM(Ia, <data6>)| ;

|PM(Ic, <data6>) |

4d.

IF condition

compute,

dreg =

|DM(<data6>, Ia)| ;

|PM(<data6>, Ic) |

5.

IF condition

compute,

ureg1 = ureg2 ;

6a.

IF condition

shiftimm,

|DM(Ia, Mb)| = dreg ;

|PM(Ic, Md) |

6b.

IF condition

shiftimm,

dreg =

|DM(Ia, Mb)| ;

|PM(Ic, Md) |

7.

IF condition

compute,

MODIFY

|(Ia, Mb) | ;

7.

IF condition

compute,

MODIFY |(Ic, Md) |

PROGRAM FLOW CONTROL INSTRUCTIONS

8.

IF condition

|JUMP ||<addr24>

|

(

|DB

|) ;

|CALL ||(PC, <reladdr6>) |

(|LA,

|

|CALL||(PC, <reladdr6>) |

(

|DB, LA |

9.

IF condition

|JUMP ||(Md, Ic)

|

(

|DB

|), compute ;

|CALL ||(PC, <reladdr6>) |

(|LA,

|

|CALL||(PC, <reladdr6>) |

(

|DB, LA |

11.

IF condition

|RTS |

(

|DB,

|), compute ;

|RTI |

(|LA,

|

|RTI |

(

|DB, LA |

12.

LCNTR =

|<data16> | ,DO |<addr24>

| UNTIL LCE ;

12.

LCNTR =

|ureg

| ,DO |(<PC, <reladdr24>)( | UNTIL LCE ;

13.

LCNTR =

|<data16> | , DO |<addr24>

| UNTIL termination ;

12.

LCNTR =

|ureg

| ,DO |(|(PC, <reladdr24>) |

(DB) Delayed branch

(LA) Loop abort (pop loop PC stacks on branch)

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ADSP-21020TG-120 Datasheet(PDF) 7 Page - Analog Devices

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