MOVE (Super FX): Difference between revisions

Latest revision as of 05:31, 16 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 R_n, R_n'

MOVE R_n, R_n' as a GSU instruction transfers the value from R_n' to R_n. 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_n' is the source and the register of TO R_n is the destination (for this reason, it is safe to assume that the transfer happens from S_reg to D_reg).

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 1

Let:

R₁₄ = 4983h
R₈ = 9264h

when MOVE R₈, R₁₄ is executed:

R₈ = 4983h

Example 2

MOVE R₈, #070h   ; 0070h -> R₈  (IBT R₈, #070h)
MOVE R₈, #0A4h   ; 00a4h -> R₈  (IWT R₈, #0A4h)
MOVE R₈, #-128   ; ff80h -> R₈  (IBT R₈, #-128)

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

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-{| class="wikitable" style="float:right;clear:right;width:40%"
+{| class="wikitable" style="float:right;clear:right;width:50%"
 !colspan="8"|Basic Info
 |+
+|'''Addressing Mode'''
 |'''Opcode'''
 |'''Length'''
@@ Line 8: / Line 9: @@
 |'''Cache Speed'''
 |+
+|
 |2n'1n
 |2 bytes
@@ Line 22: / Line 24: @@
 |[[ALT2]]
 |[[O/V]]
-|S
+|[[Sign Flag|S]]
 |[[CY]]
-|Z
+|[[Zero Flag|Z]]
 |+
 |0
@@ Line 35: / Line 37: @@
 |}
-'''MOVE''' is the name of a [[Super FX]] instruction and macro instructions that moves the value of a register.
+'''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 ====
+<pre>
+MOVE Rn, Rn'
+MOVE Rn, #xx
+MOVE Rn, (xx)
+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>
+==== Example 1 ====
+Let:
+ R<sub>14</sub> = 4983h
+ R<sub>8</sub> = 9264h
+when MOVE R<sub>8</sub>, R<sub>14</sub> is executed:
+ R<sub>8</sub> = 4983h
+==== Example 2 ====
+ MOVE R<sub>8</sub>, #070h   ; 0070h -> R<sub>8</sub>  (IBT R<sub>8</sub>, #070h)
+ MOVE R<sub>8</sub>, #0A4h   ; 00a4h -> R<sub>8</sub>  (IWT R<sub>8</sub>, #0A4h)
+ MOVE R<sub>8</sub>, #-128   ; ff80h -> R<sub>8</sub>  (IBT R<sub>8</sub>, #-128)
 === See Also ===
+* [[B flag]]
 * [[MOVES]]
 * [[MOVEW]]
 * [[MOVEB]]
+* [[LM (Super FX)|LM]]
+* [[LMS]]
+* [[IBT]]
+* [[IWT]]
+* [[MOV]]
 === External Links ===
-* Official Super Nintendo development manual on MOVE: [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]]