Initial import

third_party/compiler_rt/subtf3.c

@@ -0,0 +1,30 @@
+/* clang-format off */
+//===-- lib/subtf3.c - Quad-precision subtraction -----------------*- 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 subtraction with the
+// IEEE-754 default rounding (to nearest, ties to even).
+//
+//===----------------------------------------------------------------------===//
+
+STATIC_YOINK("huge_compiler_rt_license");
+
+#define QUAD_PRECISION
+#include "third_party/compiler_rt/fp_lib.inc"
+
+#if defined(CRT_HAS_128BIT) && defined(CRT_LDBL_128BIT)
+COMPILER_RT_ABI fp_t __addtf3(fp_t a, fp_t b);
+
+// Subtraction; flip the sign bit of b and add.
+COMPILER_RT_ABI fp_t
+__subtf3(fp_t a, fp_t b) {
+    return __addtf3(a, fromRep(toRep(b) ^ signBit));
+}
+
+#endif