1 files changed, 29 insertions, 0 deletions
diff --git a/contrib/llvm-project/compiler-rt/lib/builtins/subvsi3.c b/contrib/llvm-project/compiler-rt/lib/builtins/subvsi3.c
new file mode 100644
index 000000000000..c3cb6e8a217c
--- /dev/null
+++ b/contrib/llvm-project/compiler-rt/lib/builtins/subvsi3.c
@@ -0,0 +1,29 @@
+//===-- subvsi3.c - Implement __subvsi3 -----------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements __subvsi3 for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
+
+#include "int_lib.h"
+
+// Returns: a - b
+
+// Effects: aborts if a - b overflows
+
+COMPILER_RT_ABI si_int __subvsi3(si_int a, si_int b) {
+  si_int s = (su_int)a - (su_int)b;
+  if (b >= 0) {
+    if (s > a)
+      compilerrt_abort();
+  } else {
+    if (s <= a)
+      compilerrt_abort();
+  }
+  return s;
+}