853188b010
- Fixed a bug with VM assigning wrong opcode. After doing a little digging into the Iridium 1 source code (skipping to the next part of the tutorial), I discovered I had to have implement from() function in both directions. I.e. the Opcode outputs integer and integer outputs an Opcode. Derp moment in retrospective since I already had it done for the former but this is a learning experience. - Moved Opcode enum to assembler module.
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770 B
Markdown
28 lines
No EOL
770 B
Markdown
# Specifications
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## Iridium
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Corten [MIPS64 Release 6](https://en.wikipedia.org/wiki/MIPS_architecture#MIPS32/MIPS64_Release_6) virtual machine based on Fletcher Haynes's [So you want to build a language VM](https://blog.subnetzero.io/post/building-language-vm-part-01/) tutorial.
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## Instruction Set
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| Opcode | Function | Comment |
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| --- | --- | --- |
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| 0 | LOAD | Load program |
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| 1 | ADD |
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| 2 | SUB |
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| 3 | MUL |
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| 4 | DIV |
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| 5 | HLT | Halt |
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| 6 | JMP | Jump |
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| 7 | JMPF | Jump forward |
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| 8 | JMPB | Jump backward |
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| 9 | EQ | Equal |
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| 10 | NEQ | Not equal |
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| 11 | GTE | Greater then or equal to |
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| 12 | GT | Greater then |
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| 13 | LTE | Less then or equal to |
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| 14 | LT | Less then |
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| 15 | JMPE | Jump if equal |
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| 16 | NOP |
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| _ | IGL | Illegal action | |