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MULT (Super FX): Difference between revisions
From SnesLab
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=== External Links === | === External Links === | ||
Revision as of 00:27, 6 July 2024
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | ROM Speed | RAM Speed | Cache Speed | ||
| Implied (type 1) | 8n | 1 byte | 3 or 5 cycles | 3 or 5 cycles | 1 or 2 cycles | ||
| Immediate | 3E8n | 2 bytes | 6 or 8 cycles | 6 or 8 cycles | 2 or 3 cycles | ||
| Flags Affected | ||||||||
|---|---|---|---|---|---|---|---|---|
| B | ALT1 | ALT2 | O/V | S | CY | Z | ||
| 0 | 0 | 0 | . | . | ||||
MULT is a Super FX instruction that performs a signed multiplication. One of the factors is the low byte of the source register. The other factor may be any register from R0 to R15 or an immediate int from 0 to 15. The product is stored in the destination register.
MULT utilizes the 8-bit multiplier only once, so it is fast.[2]
The exact number of cycles depends on the state of the CFGR register.
Syntax
MULT Rn MULT #n
See Also
External Links
- Official Nintendo documentation on MULT: 9.66 on Page 2-9-93 of Book II
- 8.2 "Multiplication Instructions" on page 2-8-16 of Book II, lbid.