From 698f8c2f01ea549d77d7dc3338a12e04c11057b9 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 17 Apr 2024 14:02:58 +0200
Subject: Adding upstream version 1.64.0+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 compiler/rustc_target/src/abi/call/nvptx.rs | 33 +++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 compiler/rustc_target/src/abi/call/nvptx.rs

(limited to 'compiler/rustc_target/src/abi/call/nvptx.rs')

diff --git a/compiler/rustc_target/src/abi/call/nvptx.rs b/compiler/rustc_target/src/abi/call/nvptx.rs
new file mode 100644
index 000000000..428dd95bb
--- /dev/null
+++ b/compiler/rustc_target/src/abi/call/nvptx.rs
@@ -0,0 +1,33 @@
+// Reference: PTX Writer's Guide to Interoperability
+// https://docs.nvidia.com/cuda/ptx-writers-guide-to-interoperability
+
+use crate::abi::call::{ArgAbi, FnAbi};
+
+fn classify_ret<Ty>(ret: &mut ArgAbi<'_, Ty>) {
+    if ret.layout.is_aggregate() && ret.layout.size.bits() > 32 {
+        ret.make_indirect();
+    } else {
+        ret.extend_integer_width_to(32);
+    }
+}
+
+fn classify_arg<Ty>(arg: &mut ArgAbi<'_, Ty>) {
+    if arg.layout.is_aggregate() && arg.layout.size.bits() > 32 {
+        arg.make_indirect();
+    } else {
+        arg.extend_integer_width_to(32);
+    }
+}
+
+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);
+    }
+}
-- 
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