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ROL (Super FX): Difference between revisions
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'''ROL''' (Rotate Left) is a [[Super FX]] instruction that rotates the [[source register]] and [[CY|carry flag]] one bit to the left into the [[destination register]]. | '''ROL''' (Rotate Left) is a [[Super FX]] instruction that rotates the [[source register]] and [[CY|carry flag]] one bit to the left into the [[destination register]]. A total of 17 bits participate in the rotation. | ||
The source and destination registers should be specified in advance using [[WITH]], [[FROM]], or [[TO]]. Otherwise, R<sub>0</sub> serves as the default. | The source and destination registers should be specified in advance using [[WITH]], [[FROM]], or [[TO]]. Otherwise, R<sub>0</sub> serves as the default. | ||
Revision as of 20:53, 12 July 2024
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | ROM Speed | RAM Speed | Cache Speed | ||
| Implied (type 1) | 04 | 1 byte | 3 cycles | 3 cycles | 1 cycle | ||
| Flags Affected | ||||||||
|---|---|---|---|---|---|---|---|---|
| B | ALT1 | ALT2 | O/V | S | CY | Z | ||
| 0 | 0 | 0 | . | |||||
ROL (Rotate Left) is a Super FX instruction that rotates the source register and carry flag one bit to the left into the destination register. A total of 17 bits participate in the rotation.
The source and destination registers should be specified in advance using WITH, FROM, or TO. Otherwise, R0 serves as the default.
Syntax
ROL
Example
Let:
Sreg : R8 Dreg : R4 R8 = 1d4bh (0001 1101 0100 1011b) CY = 1
After executing ROL:
R4 = 3a97h (0011 1010 1001 0111b) CY = 0
See Also
External Links
- Official Nintendo documentation on ROL: Page 2-9-102 of Book II
- example: page 2-9-103, lbid.