Added src/codegen/holeybytes.rs.
This commit is contained in:
Goren Barak
parent
e3cdfec0d9
commit
137d9f5884
274
src/codegen/holeybytes.rs
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274
src/codegen/holeybytes.rs
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@ -0,0 +1,274 @@
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use crate::parse::ast::*;
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use skylang::temp;
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use std::rc::Rc;
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use std::collections::HashMap;
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#[derive(Debug)]
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pub struct HbCodegen {
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pc: u32,
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functions: HashMap<String, u32>,
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globals: HashMap<String, u64>,
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}
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impl HbCodegen {
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pub fn new() -> Self {
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HbCodegen {
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pc: 0,
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functions: HashMap::new(),
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globals: HashMap::new()
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}
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}
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pub fn hb_codegen(&mut self, exprs: &Vec<Expr>) -> &[u8] {
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let mut gen: Vec<u8> = Vec::new();
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macro_rules! unwrap {
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($item:expr) => {
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ins!({ self.hb_codegen(&vec![Rc::unwrap_or_clone($item)]) });
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};
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(norc $item:expr) => {
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ins!(*{ self.hb_codegen(&vec![$item]) });
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}
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}
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macro_rules! ins {
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($ins:expr) => {
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let ins = $ins;
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let new_pc = self.pc.wrapping_add(ins.len() as u32);
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gen.extend_from_slice(&ins);
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self.pc = new_pc;
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};
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($($ins:expr);+) => {
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$(
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let ins = { $ins };
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let new_pc = self.pc.wrapping_add(ins.len() as u32);
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gen.extend_from_slice(&ins);
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self.pc = new_pc;
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)+
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}
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}
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// Iterate over expressions.
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for expr in exprs.iter() {
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// Use patern matching on `expr`.
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match expr {
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// If the expression is a math expression.
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Expr::MathExpr(e) => {
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unwrap!(e.right);
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// st r1, r254, 0, 8; addi64 r254, r254, 8;
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ins!([0x4e, 1, 254, 0, 8, 0x30, 254, 254, 8]);
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unwrap!(e.left);
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// st r1, r254, 0, 8; addi64 r254, r254, 8;
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ins!([0x4e, 1, 254, 0, 8, 0x30, 254, 254, 8]);
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match e.operator {
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// If the operator is addition.
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MathOperator::OP_ADD => {
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// addi64 r254, r254, -8 (two's complement 0b11111000); ld r33, r254, 0, 8;
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ins!([0x40, 254, 254, 0b11111000, 0x4d, 33, 254, 0, 8]);
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// addi64 r254, r254, -8 (two's complement 0b11111000); ld r34, r254, 0, 8;
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ins!([0x40, 254, 254, 0b11111000, 0x4d, 34, 254, 0, 8]);
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// add64 r1, r32, r33
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ins!([0x06, 1, 32, 33]);
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},
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// If the operator is multiplication.
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MathOperator::OP_MULT => {
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// addi64 r254, r254, -8 (two's complement 0b11111000); ld r33, r254, 0, 8;
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ins!([0x40, 254, 254, 0b11111000, 0x4d, 33, 254, 0, 8]);
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// addi64 r254, r254, -8 (two's complement 0b11111000); ld r34, r254, 0, 8;
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ins!([0x40, 254, 254, 0b11111000, 0x4d, 34, 254, 0, 8]);
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// mul64 r1, r33, r34
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ins!([0x0e, 1, 33, 34]);
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},
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// If the operator is division.
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MathOperator::OP_DIV => {
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// addi64 r254, r254, -8 (two's complement 0b11111000); ld r33, r254, 0, 8;
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ins!([0x40, 254, 254, 0b11111000, 0x4d, 33, 254, 0, 8]);
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// addi64 r254, r254, -8 (two's complement 0b11111000); ld r34, r254, 0, 8;
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ins!([0x40, 254, 254, 0b11111000, 0x4d, 34, 254, 0, 8]);
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// fdiv64 r1, r33, r34
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ins!([0x65, 1, 33, 34]);
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},
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// If the operators is subtraction.
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MathOperator::OP_SUB => {
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// addi64 r254, r254, -8 (two's complement 0b11111000); ld r33, r254, 0, 8;
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ins!([0x40, 254, 254, 0b11111000, 0x4d, 33, 254, 0, 8]);
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// addi64 r254, r254, -8 (two's complement 0b11111000); ld r34, r254, 0, 8;
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ins!([0x40, 254, 254, 0b11111000, 0x4d, 34, 254, 0, 8]);
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// sub64 r1, r33, r34
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ins!([0x0a, 1, 33, 34]);
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},
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// If the operator is modulo.
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MathOperator::OP_MOD => {
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// addi64 r254, r254, -8 (two's complement 0b11111000); ld r33, r254, 0, 8;
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ins!([0x40, 254, 254, 0b11111000, 0x4d, 33, 254, 0, 8]);
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// addi64 r254, r254, -8 (two's complement 0b11111000); ld r34, r254, 0, 8;
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ins!([0x40, 254, 254, 0b11111000, 0x4d, 34, 254, 0, 8]);
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// dirs64 r2, r1, r33, r34
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}
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}
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},
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// If the expression is a function call.
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Expr::FunCall(e) => {
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for (i, p) in e.params.iter().enumerate() {
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match i {
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0 => {
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unwrap!(*p);
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// cp r2, r1
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ins!([0x46, 2, 1]);
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},
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1 => {
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unwrap!(*p);
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// cp r3, r1
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ins!([0x46, 3, 1]);
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},
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2 => {
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unwrap!(*p);
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// cp r4, r1
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ins!([0x46, 4, 1]);
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},
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3 => {
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unwrap!(*p);
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// cp r5, r1
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ins!([0x46, 5, 1]);
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},
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4 => {
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unwrap!(*p);
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// cp r6, r1
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ins!([0x46, 6, 1]);
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},
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5 => {
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unwrap!(*p);
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// cp r7, r1
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ins!([0x46, 7, 1]);
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},
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6 => {
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unwrap!(*p);
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// cp r8, r1
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ins!([0x46, 8, 1]);
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},
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7 => {
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unwrap!(*p);
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// cp r9, r1
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ins!([0x46, 9, 1]);
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},
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8 => {
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unwrap!(*p);
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// cp r10, r1
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ins!([0x46, 10, 1]);
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},
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9 => {
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unwrap!(*p);
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// cp r11, r1
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ins!([0x46, 11, 1]);
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},
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_ => {
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println!("More than ten parameters are currently not supported.");
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std::process::exit(1);
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}
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}
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}
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ins!([0x53]; unsafe { std::mem::transmute::<u32, [u8; 4]>(self.pc.wrapping_sub(self.functions[e.name])) });
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},
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// Define a global variable.
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Expr::GlobalDefinition(e) => {
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// Define a 64-bit global variable.
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println!("Global variables are currently unsupported.");
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std::process::exit(1);
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},
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// Breakpoint.
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Expr::Breakpoint => {
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// Write the interrupt for a debugger breakpoint.
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ins!([0]);
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},
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// Return something from a function.
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Expr::Return(e) => {
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// Do the operation that should later be returned.
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println!("Returns are currently not supported, (i was too lazy to implement)");
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std::process::exit(1);
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},
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// A function defenition.
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Expr::FunDefinition(e) => {
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self.functions.insert(e.name.to_owned(), self.pc);
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ins!(&self.hb_codegen(&e.contents).to_vec());
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},
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Expr::If(e) => {
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// Increment the temporary variable/function counter.
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// Compare the left and right value.
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unwrap!(e.left);
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// st r1, r254, 0, 8; addi64 r254, r254, 8;
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ins!([0x4e, 1, 254, 0, 8, 0x30, 254, 254, 8]);
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unwrap!(e.right);
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// st r1, r254, 0, 8; addi64 r254, r254, 8;
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ins!([0x4e, 1, 254, 0, 8, 0x30, 254, 254, 8]);
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let action = self.pc;
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ins!(&self.hb_codegen(&e.action).to_vec());
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// Check what the condition is.
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match e.cond {
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COND_OP::EQ => {
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// If the compared values are equal to each other jump to the temporary function.
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ins!([0x56]; unsafe { std::mem::transmute::<u32, [u8; 4]>(self.pc.wrapping_sub(action)) });
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},
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COND_OP::NE => {
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// If the compared values are not equal to eachother jump to the temporary function.
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ins!([0x57]; unsafe { std::mem::transmute::<u32, [u8; 4]>(self.pc.wrapping_sub(action)) });
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}
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}
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},
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Expr::Number(n) => {
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ins!([0x4b, 1]; unsafe { ::core::mem::transmute::<u64, [u8; 8]>(*n) });
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},
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no => unsafe {
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// Write some data I randomly typed to your memory because don't going around playing with something that I haven't implemented yet.
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println!("{:?} is not. implemented. prepare to be destroyed >:-(", no);
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let ptr = std::ptr::null_mut::<f64>();
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::std::ptr::write(ptr, 124010240120401240.12410240124120401240);
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},
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}
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}
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&gen
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}
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}
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