rustc_target/callconv/
mips.rs

1use rustc_abi::{HasDataLayout, Size, TyAbiInterface};
2
3use crate::callconv::{ArgAbi, FnAbi, Reg, Uniform};
4
5fn classify_ret<Ty, C>(cx: &C, ret: &mut ArgAbi<'_, Ty>, offset: &mut Size)
6where
7    C: HasDataLayout,
8{
9    if !ret.layout.is_aggregate() {
10        ret.extend_integer_width_to(32);
11    } else {
12        ret.make_indirect();
13        *offset += cx.data_layout().pointer_size();
14    }
15}
16
17fn classify_arg<'a, Ty, C>(cx: &C, arg: &mut ArgAbi<'a, Ty>, offset: &mut Size)
18where
19    Ty: TyAbiInterface<'a, C> + Copy,
20    C: HasDataLayout,
21{
22    if !arg.layout.is_sized() {
23        // FIXME: Update offset?
24        // Not touching this...
25        return;
26    }
27    let dl = cx.data_layout();
28    let align = arg.layout.align.abi.max(dl.i32_align).min(dl.i64_align);
29
30    if arg.layout.pass_indirectly_in_non_rustic_abis(cx) {
31        arg.make_indirect();
32        *offset = offset.align_to(align) + dl.pointer_size().align_to(align);
33        return;
34    }
35
36    let size = arg.layout.size;
37    if arg.layout.is_aggregate() {
38        let pad_i32 = !offset.is_aligned(align);
39        arg.cast_to_and_pad_i32(Uniform::new(Reg::i32(), size), pad_i32);
40    } else {
41        arg.extend_integer_width_to(32);
42    }
43
44    *offset = offset.align_to(align) + size.align_to(align);
45}
46
47pub(crate) fn compute_abi_info<'a, Ty, C>(cx: &C, fn_abi: &mut FnAbi<'a, Ty>)
48where
49    Ty: TyAbiInterface<'a, C> + Copy,
50    C: HasDataLayout,
51{
52    let mut offset = Size::ZERO;
53    if !fn_abi.ret.is_ignore() {
54        classify_ret(cx, &mut fn_abi.ret, &mut offset);
55    }
56
57    for arg in fn_abi.args.iter_mut() {
58        if arg.is_ignore() {
59            continue;
60        }
61        classify_arg(cx, arg, &mut offset);
62    }
63}
rustc_target/callconv/mips.rs

rustc_target/callconv/
mips.rs
