1 files changed, 64 insertions, 0 deletions
diff --git a/compiler/rustc_target/src/abi/call/nvptx64.rs b/compiler/rustc_target/src/abi/call/nvptx64.rs
new file mode 100644
index 000000000..fc16f1c97
--- /dev/null
+++ b/compiler/rustc_target/src/abi/call/nvptx64.rs
@@ -0,0 +1,64 @@
+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 &mut fn_abi.args {
+        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 &mut fn_abi.args {
+        if arg.is_ignore() {
+            continue;
+        }
+        classify_arg_kernel(cx, arg);
+    }
+}