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CMP (Super FX): Difference between revisions
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!colspan="9"|Flags Affected | !colspan="9"|Flags Affected | ||
|+ | |+ | ||
|B | |[[B Flag|B]] | ||
|[[ALT1]] | |[[ALT1]] | ||
|[[ALT2]] | |[[ALT2]] | ||
|[[O/V]] | |[[O/V]] | ||
|S | |[[Sign Flag|S]] | ||
|[[CY]] | |[[CY]] | ||
|Z | |Z | ||
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'''CMP''' (Compare) is a [[Super FX]] instruction that compares the operand register with the [[source register]]. Internally, this is done via a subtraction, but the difference is not stored anywhere. | '''CMP''' (Compare) is a [[Super FX]] instruction that compares the operand register with the [[source register]]. Internally, this is done via a subtraction, but the difference is not stored anywhere. Thus, the purpose of CMP is to setup the flags. | ||
The operand serves as the subtrahend and can be any register from R<sub>0</sub> to R<sub>15</sup>. | |||
=== See Also === | === See Also === | ||
* [[CMP]] | * [[CMP]] | ||
* [[SUB]] | |||
* [[SBC]] | |||
=== External Links === | === External Links === | ||
* Official Nintendo documentation on CMP: [https://archive.org/details/SNESDevManual/book2/page/n197 | * Official Nintendo documentation on CMP: 9.29 on [https://archive.org/details/SNESDevManual/book2/page/n197 page 2-9-41 of Book II] | ||
[[Category:ASM]] | [[Category:ASM]] | ||
[[Category:Super FX]] | [[Category:Super FX]] | ||
[[Category:Two-byte Instructions]] | |||
Latest revision as of 03:11, 2 July 2024
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | ROM Speed | RAM Speed | Cache Speed | ||
| Implied | 3F6n | 2 bytes | 6 cycles | 6 cycles | 2 cycles | ||
| Flags Affected | ||||||||
|---|---|---|---|---|---|---|---|---|
| B | ALT1 | ALT2 | O/V | S | CY | Z | ||
| 0 | 0 | 0 | ||||||
CMP (Compare) is a Super FX instruction that compares the operand register with the source register. Internally, this is done via a subtraction, but the difference is not stored anywhere. Thus, the purpose of CMP is to setup the flags.
The operand serves as the subtrahend and can be any register from R0 to R15.
See Also
External Links
- Official Nintendo documentation on CMP: 9.29 on page 2-9-41 of Book II