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DEC (Super FX): Difference between revisions
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'''DEC''' is a [[Super FX]] instruction that decrements a register by one. The register selected can be from R<sub>0</sub> to R<sub>14</sub>. | '''DEC''' is a [[Super FX]] instruction that decrements a register by one. The register selected can be from R<sub>0</sub> to R<sub>14</sub>. | ||
The [[ALT0]] state is restored. | |||
==== Syntax ==== | ==== Syntax ==== | ||
Revision as of 00:04, 13 July 2024
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | ROM Speed | RAM Speed | Cache Speed | ||
| Implied (type 1) | En | 1 byte | 3 cycles | 3 cycles | 1 cycle | ||
| Flags Affected | ||||||||
|---|---|---|---|---|---|---|---|---|
| B | ALT1 | ALT2 | O/V | S | CY | Z | ||
| 0 | 0 | 0 | . | . | ||||
DEC is a Super FX instruction that decrements a register by one. The register selected can be from R0 to R14.
The ALT0 state is restored.
Syntax
DEC Rn
Example
Let:
R9 = a3f7h
After executing DEC R9:
R9 = a3f6h
See Also
External Links
- Official Nintendo documentation on DEC: 9.31 on page 2-9-43 of Book II