use crate::abi::call::{ArgAbi, FnAbi, Reg};
use crate::abi::{HasDataLayout, TyAbiInterface};
fn classify_ret<Ty>(ret: &mut ArgAbi<'_, Ty>) {
if !ret.layout.is_aggregate() && ret.layout.size.bits() <= 64 {
ret.extend_integer_width_to(64);
} else {
ret.make_indirect();
}
}
fn classify_arg<'a, Ty, C>(cx: &C, arg: &mut ArgAbi<'a, Ty>)
where
Ty: TyAbiInterface<'a, C> + Copy,
C: HasDataLayout,
{
if !arg.layout.is_aggregate() && arg.layout.size.bits() <= 64 {
arg.extend_integer_width_to(64);
return;
}
if arg.layout.is_single_fp_element(cx) {
match arg.layout.size.bytes() {
4 => arg.cast_to(Reg::f32()),
8 => arg.cast_to(Reg::f64()),
_ => arg.make_indirect(),
}
} else {
match arg.layout.size.bytes() {
1 => arg.cast_to(Reg::i8()),
2 => arg.cast_to(Reg::i16()),
4 => arg.cast_to(Reg::i32()),
8 => arg.cast_to(Reg::i64()),
_ => arg.make_indirect(),
}
}
}
pub fn compute_abi_info<'a, Ty, C>(cx: &C, fn_abi: &mut FnAbi<'a, Ty>)
where
Ty: TyAbiInterface<'a, C> + Copy,
C: HasDataLayout,
{
if !fn_abi.ret.is_ignore() {
classify_ret(&mut fn_abi.ret);
}
for arg in fn_abi.args.iter_mut() {
if arg.is_ignore() {
continue;
}
classify_arg(cx, arg);
}
}