ADSP-21020 Datasheet, PDF (7/32 Pages) Analog Devices – 32/40-Bit IEEE Floating-Point DSP Microprocessor

COMPUTE AND MOVE OR MODIFY INSTRUCTIONS
1.
compute,
|^{DM(Ia, Mb) = dreg1}| ^,
|_{dreg1 = DM(Ia, Mb)}|
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
7. IF condition
compute,
compute,
MODIFY _|(Ia, Mb) _| ;
MODIFY ^|(Ic, Md) ^|
|^{PM(Ic, Md) = dreg2}| ^;
|_{dreg2 = PM(Ic, Md)}|
PROGRAM FLOW CONTROL INSTRUCTIONS
8. IF condition
|^JUMP |
|_CALL |
|_CALL|
|^<addr24>
|
|_{(PC, <reladdr6>)} |
|_{(PC, <reladdr6>)} |
9. IF condition
|^JUMP |
|_CALL |
|_CALL|
|^{(Md, Ic)}
|
|_{(PC, <reladdr6>)} |
|_{(PC, <reladdr6>)} |
(_|DB _|) ;
((^||LDAB,,
LA
|
|
(_|DB _|) , compute ;
((^||LDAB,,
LA
|
|
ADSP-21020
11. IF condition
|^RTS |
|_{RTI |}
|_{RTI |}
(_|DB, _|) , compute ;
((^||LDAB,,
LA
|
|
12. LCNTR =
12. LCNTR =
|^<data16> | ^{, DO} |^<addr24>
| ^{UNTIL LCE ;}
|_ureg | _{, DO} |(<PC, _{<reladdr24>)(} | _{UNTIL LCE ;}
13. LCNTR =
12. LCNTR =
|^<data16> | ^{, DO} |^<addr24>
| ^{UNTIL termination ;}
|_ureg | _{, DO} |(|_{(PC, <reladdr24>)} |
(DB) Delayed branch
(LA) Loop abort (pop loop PC stacks on branch)
REV. C
–7–