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use crate::abi::call::{ArgAbi, FnAbi, PassMode, Reg, Size, Uniform};
use crate::abi::{HasDataLayout, TyAbiInterface};
fn classify_ret<Ty>(ret: &mut ArgAbi<'_, Ty>) {
if ret.layout.is_aggregate() && ret.layout.size.bits() > 64 {
ret.make_indirect();
}
}
fn classify_arg<Ty>(arg: &mut ArgAbi<'_, Ty>) {
if arg.layout.is_aggregate() && arg.layout.size.bits() > 64 {
arg.make_indirect();
}
}
fn classify_arg_kernel<'a, Ty, C>(_cx: &C, arg: &mut ArgAbi<'a, Ty>)
where
Ty: TyAbiInterface<'a, C> + Copy,
C: HasDataLayout,
{
if matches!(arg.mode, PassMode::Pair(..)) && (arg.layout.is_adt() || arg.layout.is_tuple()) {
let align_bytes = arg.layout.align.abi.bytes();
let unit = match align_bytes {
1 => Reg::i8(),
2 => Reg::i16(),
4 => Reg::i32(),
8 => Reg::i64(),
16 => Reg::i128(),
_ => unreachable!("Align is given as power of 2 no larger than 16 bytes"),
};
arg.cast_to(Uniform { unit, total: Size::from_bytes(2 * align_bytes) });
}
}
pub fn compute_abi_info<Ty>(fn_abi: &mut FnAbi<'_, Ty>) {
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(arg);
}
}
pub fn compute_ptx_kernel_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.layout.is_unit() && !fn_abi.ret.layout.is_never() {
panic!("Kernels should not return anything other than () or !");
}
for arg in fn_abi.args.iter_mut() {
if arg.is_ignore() {
continue;
}
classify_arg_kernel(cx, arg);
}
}
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