updated readme

This commit is contained in:
Goren Barak 2023-11-16 19:05:34 -05:00
parent 7c3d913140
commit 55c493f350
5 changed files with 105 additions and 1 deletions

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.gitignore vendored
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/target
tags
TAGS

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.images/slang_logo.png Normal file

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# SkyLang
# ![SkyLang](.images/slang-logo.png)

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src/codegen/#fasm.rs# Normal file
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use crate::parse::ast::*;
pub fn fasm_codegen(expr: Expr) -> String {
let mut asm_text = String::new();
let mut asm_data = String::new();
asm_text.push_str("format ELF64 executable 3\n");
asm_text.push_str("segment readable executable\n");
asm_text.push_str("entry _start\n");
asm_text.push_str("_start:\n");
asm_data.push_str("segment readable writeable\n");
match expr {
Expr::MathExpr(e) => {
asm_text.push_str(format!("\tmov r10, {:?}\n", e.left).as_str());
asm_text.push_str(format!("\tmov r11, {:?}\n", e.right).as_str());
match e.operator {
// If the operator is addition.
MathOperator::OP_ADD => {
asm_text.push_str("\tadd r10, r11\n");
asm_text.push_str("\tmov rax, r10\n");
},
// If the operator is multiplication.
MathOperator::OP_MULT => {
asm_text.push_str("\timul r10, r11\n");
asm_text.push_str("\tmov rax, r10\n");
},
// If the operator is division.
MathOperator::OP_DIV => {
asm_text.push_str("\tmov rax, r10\n");
asm_text.push_str("\tmov rdx, r11\n");
asm_text.push_str("\tidiv r10, r11\n");
asm_text.push_str("\tmov rax, r10\n");
},
// If the operators is subtraction.
MathOperator::OP_SUB => {
asm_text.push_str("\tsub r10, r11\n");
asm_text.push_str("\tmov rax, r10\n");
},
// If the operator is modulo.
MathOperator::OP_MOD => {
asm_text.push_str("\tmov rax, r10\n");
asm_text.push_str("\tmov rdx, r11\n");
asm_text.push_str("\tidiv r10, r11\n");
asm_text.push_str("\tmov rax, rdx\n");
}
}
},
Expr::FunCall(e) => {
for (i, p) in e.params.iter().enumerate() {
match i {
0 => {
// First parameter. Put in %rdi.
asm_text.push_str(format!("\tmov rdi, {:?}\n", p.value).as_str());
},
1 => {
// Second parameter. Put in %rsi.
asm_text.push_str(format!("\tmov rsi, {:?}\n", p.value).as_str());
},
2 => {
// Third parameter. Put in %rdx.
asm_text.push_str(format!("\tmov rdx, {:?}\n", p.value).as_str());
},
3 => {
// Fourth parameter. Put in %rcx.
asm_text.push_str(format!("\tmov rcx, {:?}\n", p.value).as_str());
},
4 => {
// Fifth parameter. Put in %r8.
asm_text.push_str(format!("\tmov r8, {:?}\n", p.value).as_str());
},
5 => {
// Sixth parameter. Put in %r9.
asm_text.push_str(format!("\tmov r9, {:?}\n", p.value).as_str());
},
_ => {
// Parameters after the sixth parameter are pushed to the stack.
asm_text.push_str(format!("\tpush {:?}\n", p.value).as_str());
}
}
}
asm_text.push_str(format!("call {:?}", e.name).as_str());
},
Expr::VarDefenition(e) => {
asm_data.push_str(format!("{} dq {:?}", e.name, e.value).as_str());
},
_ => unimplemented!("sorry unimplemented"),
}
let asm = format!("{}{}", asm_text, asm_data);
println!("{}", asm);
asm
}

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src/codegen/.#fasm.rs Symbolic link
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goren@goren.13806:1700158488