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allow more than 6 parameters, fix index bug, str.is_*

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This commit is contained in:
Antoni Piasecki
2025-12-25 20:29:31 +01:00
parent 781c35d484
commit 07b46a987b
2 changed files with 38 additions and 9 deletions
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29
src/codegen_x86_64.rs
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@@ -239,11 +239,17 @@ _builtin_environ:
for (i, param) in params.iter().enumerate() {
let offset = env
.define_var(param.var_name.lexeme.clone(), param.var_type.lexeme.clone());
let reg = match REGISTERS.get(i) {
Some(x) => x,
None => return error!(&name.loc, "only up to 6 params allowed"),
};
emit!(&mut self.output, " mov QWORD [rbp-{}], {}", offset, reg);
if let Some(reg) = REGISTERS.get(i) {
emit!(&mut self.output, " mov QWORD [rbp-{}], {}", offset, reg);
} else {
let stack_offset = 16 + 8 * (i - REGISTERS.len());
emit!(
&mut self.output,
" mov rax, QWORD [rbp+{}]",
stack_offset
);
emit!(&mut self.output, " mov QWORD [rbp-{}], rax", offset);
}
}
self.compile_stmt(env, *body)?;
@@ -517,7 +523,11 @@ _builtin_environ:
for i in 0..num_stack {
let arg_idx = arg_count - 1 - i;
let offset = 8 * (arg_count - 1 - arg_idx);
emit!(&mut self.output, " mov rax, QWORD [rsp + {}]", offset);
emit!(
&mut self.output,
" mov rax, QWORD [rsp + {}]",
offset + 8 * i
);
emit!(&mut self.output, " push rax");
}
}
@@ -560,10 +570,11 @@ _builtin_environ:
}
Expr::Index { expr, index } => {
self.compile_expr(env, *expr)?;
emit!(&mut self.output, " mov rdi, rax");
emit!(&mut self.output, " push rax");
self.compile_expr(env, *index)?;
emit!(&mut self.output, " add rdi, rax");
emit!(&mut self.output, " call _builtin_read8");
emit!(&mut self.output, " pop rbx");
emit!(&mut self.output, " add rax, rbx");
emit!(&mut self.output, " movzx rax, BYTE [rax]");
}
Expr::AddrOf { op, expr } => match *expr {
Expr::Variable(name) => {