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LOOP (Super FX): Difference between revisions
From SnesLab
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'''LOOP''' is a [[Super FX]] instruction that decrements | '''LOOP''' is a [[Super FX]] instruction that decrements R<sub>12</sub>. If the zero flag is set afterwards, R<sub>15</sub> is incremented. Otherwise, R<sub>13</sub> is stored to R<sub>15</sub>. | ||
The next instruction after LOOP is already loaded into the pipeline. | The next instruction after LOOP is already loaded into the pipeline. | ||
Revision as of 02:40, 16 December 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