Provide add and sub for IEEE quad. From GuanHong Liu.

Differential Revision: http://reviews.llvm.org/D2798

llvm-svn: 211312

1 files changed, 25 insertions, 0 deletions

diff --git a/compiler-rt/lib/builtins/addtf3.c b/compiler-rt/lib/builtins/addtf3.c
new file mode 100644
index 00000000000..e4bbe0227ae
--- /dev/null
+++ b/compiler-rt/lib/builtins/addtf3.c
@@ -0,0 +1,25 @@
+//===-- lib/addtf3.c - Quad-precision addition --------------------*- C -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements quad-precision soft-float addition with the IEEE-754
+// default rounding (to nearest, ties to even).
+//
+//===----------------------------------------------------------------------===//
+
+#define QUAD_PRECISION
+#include "fp_lib.h"
+
+#if defined(CRT_HAS_128BIT) && defined(CRT_LDBL_128BIT)
+#include "fp_add_impl.inc"
+
+COMPILER_RT_ABI long double __addtf3(long double a, long double b){
+    return __addXf3__(a, b);
+}
+
+#endif