1 files changed, 53 insertions, 0 deletions
diff --git a/compiler/rustc_target/src/callconv/mips.rs b/compiler/rustc_target/src/callconv/mips.rs
new file mode 100644
index 00000000000..37980a91c76
--- /dev/null
+++ b/compiler/rustc_target/src/callconv/mips.rs
@@ -0,0 +1,53 @@
+use crate::abi::call::{ArgAbi, FnAbi, Reg, Uniform};
+use crate::abi::{HasDataLayout, Size};
+
+fn classify_ret<Ty, C>(cx: &C, ret: &mut ArgAbi<'_, Ty>, offset: &mut Size)
+where
+    C: HasDataLayout,
+{
+    if !ret.layout.is_aggregate() {
+        ret.extend_integer_width_to(32);
+    } else {
+        ret.make_indirect();
+        *offset += cx.data_layout().pointer_size;
+    }
+}
+
+fn classify_arg<Ty, C>(cx: &C, arg: &mut ArgAbi<'_, Ty>, offset: &mut Size)
+where
+    C: HasDataLayout,
+{
+    if !arg.layout.is_sized() {
+        // Not touching this...
+        return;
+    }
+    let dl = cx.data_layout();
+    let size = arg.layout.size;
+    let align = arg.layout.align.max(dl.i32_align).min(dl.i64_align).abi;
+
+    if arg.layout.is_aggregate() {
+        let pad_i32 = !offset.is_aligned(align);
+        arg.cast_to_and_pad_i32(Uniform::new(Reg::i32(), size), pad_i32);
+    } else {
+        arg.extend_integer_width_to(32);
+    }
+
+    *offset = offset.align_to(align) + size.align_to(align);
+}
+
+pub(crate) fn compute_abi_info<Ty, C>(cx: &C, fn_abi: &mut FnAbi<'_, Ty>)
+where
+    C: HasDataLayout,
+{
+    let mut offset = Size::ZERO;
+    if !fn_abi.ret.is_ignore() {
+        classify_ret(cx, &mut fn_abi.ret, &mut offset);
+    }
+
+    for arg in fn_abi.args.iter_mut() {
+        if arg.is_ignore() {
+            continue;
+        }
+        classify_arg(cx, arg, &mut offset);
+    }
+}