Initial import of compiler-rt.

 -


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@74292 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 36 insertions, 0 deletions

diff --git a/lib/subvdi3.c b/lib/subvdi3.c
new file mode 100644
index 000000000..2548b081e
--- /dev/null
+++ b/lib/subvdi3.c
@@ -0,0 +1,36 @@
+//===-- subvdi3.c - Implement __subvdi3 -----------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements __subvdi3 for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
+
+#include "int_lib.h"
+#include <stdlib.h>
+
+// Returns: a - b
+
+// Effects: aborts if a - b overflows
+
+di_int
+__subvdi3(di_int a, di_int b)
+{
+    di_int s = a - b;
+    if (b >= 0)
+    {
+        if (s > a)
+            abort();
+    }
+    else
+    {
+        if (s <= a)
+            abort();
+    }
+    return s;
+}