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LOOP (Super FX): Difference between revisions
From SnesLab
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| Line 19: | Line 19: | ||
|+ | |+ | ||
|B | |B | ||
|ALT1 | |[[ALT1]] | ||
|ALT2 | |[[ALT2]] | ||
|O/V | |[[O/V]] | ||
|S | |S | ||
|CY | |[[CY]] | ||
|Z | |Z | ||
|+ | |+ | ||
Revision as of 07:40, 25 November 2023
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Opcode | Length | ROM Speed | RAM Speed | Cache Speed | |||
| 3C | 1 byte | 3 cycles | 3 cycles | 1 cycle | |||
| Flags Affected | ||||||||
|---|---|---|---|---|---|---|---|---|
| B | ALT1 | ALT2 | O/V | S | CY | Z | ||
| 0 | 0 | 0 | . | . | ||||
LOOP is a Super FX instruction that decrements R12. If the zero flag is set afterwards, R15 is incremented. Otherwise, R13 is stored to R15.
The next instruction after LOOP is already loaded into the pipeline.
External Links
- Official Nintendo documentation on LOOP: Page 2-9-77 of Book II