Import libcompiler_rt into HEAD and add Makefiles.

Obtained from:	user/ed/compiler-rt

1 files changed, 19 insertions, 0 deletions

diff --git a/contrib/compiler-rt/lib/negdf2.c b/contrib/compiler-rt/lib/negdf2.c
new file mode 100644
index 0000000..527b068
--- /dev/null
+++ b/contrib/compiler-rt/lib/negdf2.c
@@ -0,0 +1,19 @@
+//===-- lib/negdf2.c - double-precision negation ------------------*- C -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements double-precision soft-float negation.
+//
+//===----------------------------------------------------------------------===//
+
+#define DOUBLE_PRECISION
+#include "fp_lib.h"
+
+fp_t __negdf2(fp_t a) {
+    return fromRep(toRep(a) ^ signBit);
+}