Difference between revisions of "FF7/Field/Script/Opcodes/77 PLUS2!"
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* '''const Bit[4]''' ''S'': Source bank | * '''const Bit[4]''' ''S'': Source bank | ||
* '''const UByte''' ''Dest'': The destination variable, to which the operand is added. | * '''const UByte''' ''Dest'': The destination variable, to which the operand is added. | ||
| − | * '''const | + | * '''const UShort''' ''Oper'': The operand, added to the destination. |
==== Description ==== | ==== Description ==== | ||
Revision as of 18:53, 12 June 2011
- Opcode: 0x77
- Short name: PLUS2!
- Long name: Saturated Addition (16-bit)
Memory layout
| 0x77 | D/S | Dest | Oper |
|---|
Arguments
- const Bit[4] D: Destination bank
- const Bit[4] S: Source bank
- const UByte Dest: The destination variable, to which the operand is added.
- const UShort Oper: The operand, added to the destination.
Description
Adds two numbers together and stores the result back into "Dest" The result of the addition is capped at 32767. The result is not capped at the negative end, however (-32768), so adding two large negative numbers together will still produce wrap-around. If the Source Bank is 0 then the “Oper†is added to the destination value. If the Source Bank is an 16 bit bank, then the “Oper†is the address in that bank where the operand is.
