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More documentation.

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Felix Queißner 2016-05-22 14:48:21 +02:00
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prototypes/supervm/supervm.md
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SuperVM is a stack machine with a simple, but flexible command SuperVM is a stack machine with a simple, but flexible command
set. set.
## Purpose of this document
This document is meant to give a complete overview over the concepts and abstract
workings of SuperVM.
It is targeted at uses who program SuperVM with the native assembly language,
system programmers who want to include the virtual machine in their system or
create their own SuperVM implementation.
## The Stack ## The Stack
The virtual machine utilizes a stack to provide operands to instructions. The virtual machine utilizes a stack to provide operands to instructions.
This stack stores temporary values the program is working with. This stack stores temporary values the program is working with.
@ -201,9 +210,12 @@ Each instruction can emit an output value. The output can be used in the followi
The instruction argument can provide static input which can be used The instruction argument can provide static input which can be used
as a value source for the first input value. as a value source for the first input value.
## Assembler Mnemonics ## Common Assembler Mnemonics
| Mnemonic | Arg? | i0 | i1 | Cmd | CmdInfo | Output | Flags? | Description | The following table lists a set of practial mnemonics for the use in an assembly language.
Each mnemonic declares a specific configuration of an instruction.
| Mnemonic | Arg? | i0 | i1 | Cmd | CmdInfo | Output | Flags? | Description 1 |
|----------|------|------|------|---------|----------|---------|--------|-------------------------------------------------------------------------------------------------| |----------|------|------|------|---------|----------|---------|--------|-------------------------------------------------------------------------------------------------|
| nop | no | zero | zero | copy | 0 | discard | no | Does noting | | nop | no | zero | zero | copy | 0 | discard | no | Does noting |
| push | yes | arg | zero | copy | 0 | push | no | Pushes its argument on the stack | | push | yes | arg | zero | copy | 0 | push | no | Pushes its argument on the stack |