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MOVE (Super FX): Difference between revisions
From SnesLab
(The ALT0 state is restored.) |
(Added technical details and components of MOVE Rn, Rn'.) |
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MOVE Rn, (xx) | MOVE Rn, (xx) | ||
MOVE (xx), Rn | MOVE (xx), Rn | ||
</pre> | |||
==== MOVE R<sub>n</sub>, R<sub>n'</sub> ==== | |||
MOVE R<sub>n</sub>, R<sub>n'</sub> as a GSU instruction transfers the value from R<sub>n'</sub> to R<sub>n</sub>. The opcode is strictly speaking an alterantive execution of [[TO]], namely when the [[B flag]] is set i.e. a TO is executed immediately after a [[WITH]]. The register of WITH R<sub>n'</sub> is the source and the register of TO R<sub>n</sub> is the destination (for this reason, it is safe to assume that the transfer happens from S<sub>reg</sub> to D<sub>reg</sub>). | |||
As such, the execution of both codes are identical: | |||
<pre> | |||
; R0 = 52BAh | |||
WITH R0 | |||
TO R13 | |||
; R13 also is now 52BAh | |||
; R0 = 52BAh | |||
WITH R13,R0 | |||
; R13 also is now 52BAh | |||
</pre> | </pre> | ||
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=== See Also === | === See Also === | ||
* [[B flag]] | |||
* [[MOVES]] | * [[MOVES]] | ||
* [[MOVEW]] | * [[MOVEW]] | ||
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=== External Links === | === External Links === | ||
* Official Super Nintendo development manual on MOVE: 9.57 on [https://archive.org/details/SNESDevManual/book2/page/n237 page 2-9-81 of Book II] | * Official Super Nintendo development manual on MOVE: 9.57 on [https://archive.org/details/SNESDevManual/book2/page/n237 page 2-9-81 of Book II] | ||
* Official Super Nintendo development manual on TO: 9.57 on [https://archive.org/details/SNESDevManual/book2/page/n277 page 2-9-48 of Book II] | |||
[[Category:ASM]] | [[Category:ASM]] | ||
Revision as of 12:39, 15 July 2024
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | ROM Speed | RAM Speed | Cache Speed | ||
| 2n'1n | 2 bytes | 6 cycles | 6 cycles | 2 cycles | |||
| Flags Affected | ||||||||
|---|---|---|---|---|---|---|---|---|
| B | ALT1 | ALT2 | O/V | S | CY | Z | ||
| 0 | 0 | 0 | . | . | . | . | ||
MOVE is the name of a Super FX instruction and macro instructions that moves the value of a register or immediate value into another register or RAM.
The ALT0 state is restored.
Syntax
MOVE Rn, Rn' MOVE Rn, #xx MOVE Rn, (xx) MOVE (xx), Rn
MOVE Rn, Rn'
MOVE Rn, Rn' as a GSU instruction transfers the value from Rn' to Rn. The opcode is strictly speaking an alterantive execution of TO, namely when the B flag is set i.e. a TO is executed immediately after a WITH. The register of WITH Rn' is the source and the register of TO Rn is the destination (for this reason, it is safe to assume that the transfer happens from Sreg to Dreg).
As such, the execution of both codes are identical:
; R0 = 52BAh WITH R0 TO R13 ; R13 also is now 52BAh ; R0 = 52BAh WITH R13,R0 ; R13 also is now 52BAh
Example
Let:
R14 = 4983h R8 = 9264h
when MOVE R8, R14 is executed:
R8 = 4983h
See Also
External Links
- Official Super Nintendo development manual on MOVE: 9.57 on page 2-9-81 of Book II
- Official Super Nintendo development manual on TO: 9.57 on page 2-9-48 of Book II