1 files changed, 27 insertions, 0 deletions
diff --git a/contrib/llvm-project/compiler-rt/lib/builtins/subdf3.c b/contrib/llvm-project/compiler-rt/lib/builtins/subdf3.c
new file mode 100644
index 000000000000..2100fd39c4ef
--- /dev/null
+++ b/contrib/llvm-project/compiler-rt/lib/builtins/subdf3.c
@@ -0,0 +1,27 @@
+//===-- lib/adddf3.c - Double-precision subtraction ---------------*- C -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements double-precision soft-float subtraction.
+//
+//===----------------------------------------------------------------------===//
+
+#define DOUBLE_PRECISION
+#include "fp_lib.h"
+
+// Subtraction; flip the sign bit of b and add.
+COMPILER_RT_ABI fp_t __subdf3(fp_t a, fp_t b) {
+  return __adddf3(a, fromRep(toRep(b) ^ signBit));
+}
+
+#if defined(__ARM_EABI__)
+#if defined(COMPILER_RT_ARMHF_TARGET)
+AEABI_RTABI fp_t __aeabi_dsub(fp_t a, fp_t b) { return __subdf3(a, b); }
+#else
+COMPILER_RT_ALIAS(__subdf3, __aeabi_dsub)
+#endif
+#endif