rustc_target/callconv/
msp430.rs

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1// Reference: MSP430 Embedded Application Binary Interface
2// https://www.ti.com/lit/an/slaa534a/slaa534a.pdf
3
4use crate::callconv::{ArgAbi, FnAbi};
5
6// 3.5 Structures or Unions Passed and Returned by Reference
7//
8// "Structures (including classes) and unions larger than 32 bits are passed and
9// returned by reference. To pass a structure or union by reference, the caller
10// places its address in the appropriate location: either in a register or on
11// the stack, according to its position in the argument list. (..)"
12fn classify_ret<Ty>(ret: &mut ArgAbi<'_, Ty>) {
13    if ret.layout.is_aggregate() && ret.layout.size.bits() > 32 {
14        ret.make_indirect();
15    } else {
16        ret.extend_integer_width_to(16);
17    }
18}
19
20fn classify_arg<Ty>(arg: &mut ArgAbi<'_, Ty>) {
21    if arg.layout.is_aggregate() && arg.layout.size.bits() > 32 {
22        arg.make_indirect();
23    } else {
24        arg.extend_integer_width_to(16);
25    }
26}
27
28pub(crate) fn compute_abi_info<Ty>(fn_abi: &mut FnAbi<'_, Ty>) {
29    if !fn_abi.ret.is_ignore() {
30        classify_ret(&mut fn_abi.ret);
31    }
32
33    for arg in fn_abi.args.iter_mut() {
34        if arg.is_ignore() {
35            continue;
36        }
37        classify_arg(arg);
38    }
39}
rustc_target/callconv/msp430.rs

rustc_target/callconv/
msp430.rs
