ADD (Super FX): Difference between revisions

Latest revision as of 18:31, 30 July 2024


Basic Info
Addressing Mode	Opcode	Length	ROM Speed	RAM Speed	Cache Speed
Implied (type 1)	5n	1 bytes	3 cycles	3 cycles	1 cycle
Immediate	3E5n	2 bytes	6 cycles	6 cycles	2 cycles


Flags Affected
B	ALT1	ALT2	O/V	S	CY	Z
0	0	0	O/V	S	CY	Z

ADD is Super FX instruction that performs an addition. The source register is always an addend. The other addend may be any of the 16 general registers or an immediate value. The sum is stored in the destination register.

Unlike with ADC, CY is not an addend.

The ALT0 state is restored.

The source and destination registers should be specified in advance using WITH, FROM, or TO. Otherwise, R₀ serves as the default.

Syntax

ADD Rn
ADD #n

Example 1

Let:

S_reg : R₀
D_reg : R₀
R₀ = 4283h
R₄ = 2438h

After executing ADD R₄:

R₀ = 66bbh

Example 2

Let:

S_reg : R₄
D_reg : R₇
R₄ = 3682h

After executing ADD #8h:

R₇ = 368ah

External Links

Official Nintendo documentation on ADD: 9.6 Page 2-9-5 of Book II
ADD with immediate addressing: 9.7 Page 2-9-6 of Book II

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 |0
 |0
-|
+|O/V
-|
+|S
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+|CY
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+|Z
 |}
-'''ADD''' is [[Super FX]] instruction that performs an addition.  The [[source register]] is always an addend.  The other addend may be any of the 16 R registers or an immediate value.  The sum is stored in the [[destination register]].
+'''ADD''' is [[Super FX]] instruction that performs an addition.  The [[source register]] is always an addend.  The other addend may be any of the 16 general registers or an immediate value.  The sum is stored in the [[destination register]].
 Unlike with [[ADC (Super FX)|ADC]], [[CY]] is not an addend.