From fd089990f76ec6392dbd0138ab874d90c632d2a4 Mon Sep 17 00:00:00 2001
From: Daniel Dunbar <daniel@zuster.org>
Date: Fri, 26 Jun 2009 16:47:03 +0000
Subject: Initial import of compiler-rt.  -

llvm-svn: 74292
---
 compiler-rt/lib/absvti2.c | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 compiler-rt/lib/absvti2.c

(limited to 'compiler-rt/lib/absvti2.c')

diff --git a/compiler-rt/lib/absvti2.c b/compiler-rt/lib/absvti2.c
new file mode 100644
index 00000000000..c0869719d3f
--- /dev/null
+++ b/compiler-rt/lib/absvti2.c
@@ -0,0 +1,33 @@
+//===-- absvti2.c - Implement __absvdi2 -----------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements __absvti2 for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
+
+#if __x86_64
+
+#include "int_lib.h"
+#include <stdlib.h>
+
+// Returns: absolute value
+
+// Effects: aborts if abs(x) < 0
+
+ti_int
+__absvti2(ti_int a)
+{
+    const int N = (int)(sizeof(ti_int) * CHAR_BIT);
+    if (a == ((ti_int)1 << (N-1)))
+        abort();
+    const ti_int s = a >> (N - 1);
+    return (a ^ s) - s;
+}
+
+#endif
-- 
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