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comparison operators

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This commit is contained in:
Antoni Piasecki
2025-05-30 18:07:26 +02:00
parent 3a876a97d3
commit 2bc24c394d
3 changed files with 31 additions and 9 deletions
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36
src/codegen.rs
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@@ -68,10 +68,12 @@ impl Codegen {
&mut self.output,
"section .data
format db \"%d\", 10, 0
section .text
extern printf
global main
main:
extern printf
push rbp
mov rbp, rsp
sub rsp, 256" // TODO
@@ -100,7 +102,7 @@ section .note.GNU-stack
pub fn label(&mut self) -> String {
self.label_counter += 1;
format!(".{}", self.label_counter)
format!(".L{}", self.label_counter)
}
pub fn compile_stmt(&mut self, env: &mut Env, stmt: Stmt) -> Result<(), Box<dyn Error>> {
@@ -188,15 +190,31 @@ section .note.GNU-stack
writeln!(&mut self.output, " sete al")?;
writeln!(&mut self.output, " movzx rax, al")?;
}
TokenType::NotEqual => todo!(),
TokenType::Greater => todo!(),
TokenType::GreaterEqual => todo!(),
TokenType::NotEqual => {
writeln!(&mut self.output, " cmp rax, rbx")?;
writeln!(&mut self.output, " setne al")?;
writeln!(&mut self.output, " movzx rax, al")?;
}
TokenType::Greater => {
writeln!(&mut self.output, " cmp rax, rbx")?;
writeln!(&mut self.output, " setg al")?;
writeln!(&mut self.output, " movzx rax, al")?;
}
TokenType::GreaterEqual => {
writeln!(&mut self.output, " cmp rax, rbx")?;
writeln!(&mut self.output, " setge al")?;
writeln!(&mut self.output, " movzx rax, al")?;
}
TokenType::Less => {
writeln!(&mut self.output, " cmp rax, rbx")?;
writeln!(&mut self.output, " setl al")?;
writeln!(&mut self.output, " movzx rax, al")?;
}
TokenType::LessEqual => todo!(),
TokenType::LessEqual => {
writeln!(&mut self.output, " cmp rax, rbx")?;
writeln!(&mut self.output, " setle al")?;
writeln!(&mut self.output, " movzx rax, al")?;
}
_ => unreachable!(),
}
}
@@ -210,7 +228,11 @@ section .note.GNU-stack
self.compile_expr(env, *right)?;
match op.token_type {
TokenType::Minus => writeln!(&mut self.output, " neg rax")?,
TokenType::Bang => todo!(),
TokenType::Bang => {
writeln!(&mut self.output, " test rax, rax")?;
writeln!(&mut self.output, " sete al")?;
writeln!(&mut self.output, " movzx rax, al")?;
}
_ => unreachable!(),
}
}