VRScript 🔗

A simple compiler for vr-asm written in Python, being the highest in the abstraction order of computing. On the contrary this runs on x64 and not on vr16-isa.

VRScript is the name of language for which “software” to be developed on the CPU.

Features 🔗

1. Comments can be made using “ `` “ (double backtick).
2. Register assignments: <register> = <int> - only r0, r1, r2, r3 are valid left-hand sides.
3. Arithmetic calls: <instruction>(<store_at>, <operand_one>, <operand_two>) - supported instructions are add, sub, mul, div.
4. For loops: for <var> in <n> { <reg> <op> <value> } - runs the body n times.
   • <n> must be an integer in range 0..VR16_MAX_FOR_LOOP_ITERATIONS (default max: 10000) to prevent huge compile-time unroll output.
   • Supported loop body operators:
     • ++ → addi
     • -- → subi
     • ** → muli
     • // → divi
   • Example: for i in 4 { r3 ++ 2 } emits addi r3, 2; four times.

Working 🔗

1. compiler.py Runs in a similar fashion to the assembler.
   • Line by line is parsed.
   • `` are comments.
2. extractor.py
   • Based on opcode, an extractor function is chosen.
   • This function further rights the correct assembly code in to a .asm file.

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