We've just updated MediaWiki and its underlying software. If anything doesn't look or work quite right, please mention it to us. --RanAS
DIV2 (Super FX): Difference between revisions
From SnesLab
(added syntax) |
(added example) |
||
| Line 43: | Line 43: | ||
DIV2 | DIV2 | ||
</pre> | </pre> | ||
==== Example ==== | |||
Let: | |||
S<sub>reg</sub> : R<sub>7</sub> | |||
D<sub>reg</sub> : R<sub>2</sub> | |||
R<sub>7</sub> = 4635h (0100 0110 0011 0101b) | |||
CY = 0 | |||
After executing DIV2: | |||
R<sub>7</sub> = 231Ah (0010 0011 0001 1010b) | |||
CY = 1 | |||
=== See Also === | === See Also === | ||
Revision as of 22:00, 8 July 2024
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | ROM Speed | RAM Speed | Cache Speed | ||
| Implied (type 1) | 3D96 | 2 bytes | 6 cycles | 6 cycles | 2 cycles | ||
| Flags Affected | ||||||||
|---|---|---|---|---|---|---|---|---|
| B | ALT1 | ALT2 | O/V | S | CY | Z | ||
| 0 | 0 | 0 | . | |||||
DIV2 (DIVide by 2) is a Super FX instruction that shifts the value of the source register's bits one place to the right while also leaving the most significant bit unchanged, storing the quotient in the destination register. The source register itself is left unchanged. Unlike ASR, the output becomes zero if the input is 0xFFFF.
Syntax
DIV2
Example
Let:
Sreg : R7 Dreg : R2 R7 = 4635h (0100 0110 0011 0101b) CY = 0
After executing DIV2:
R7 = 231Ah (0010 0011 0001 1010b) CY = 1
See Also
External Links
- Official Nintendo documentation on DIV2: 9.32 on page 2-9-44 of Book II
- example: page 2-9-45, lbid.