1 files changed, 54 insertions, 0 deletions
diff --git a/contrib/llvm-project/compiler-rt/lib/builtins/fixxfdi.c b/contrib/llvm-project/compiler-rt/lib/builtins/fixxfdi.c
new file mode 100644
index 000000000000..35d7083f56b0
--- /dev/null
+++ b/contrib/llvm-project/compiler-rt/lib/builtins/fixxfdi.c
@@ -0,0 +1,54 @@
+//===-- fixxfdi.c - Implement __fixxfdi -----------------------------------===//
+//
+// 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 __fixxfdi for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
+
+#if !_ARCH_PPC
+
+#include "int_lib.h"
+
+// Returns: convert a to a signed long long, rounding toward zero.
+
+// Assumption: long double is an intel 80 bit floating point type padded with 6
+// bytes di_int is a 64 bit integral type value in long double is representable
+// in di_int (no range checking performed)
+
+// gggg gggg gggg gggg gggg gggg gggg gggg | gggg gggg gggg gggg seee eeee eeee
+// eeee | 1mmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm
+// mmmm mmmm mmmm
+
+#if defined(_MSC_VER) && !defined(__clang__)
+// MSVC throws a warning about 'uninitialized variable use' here,
+// disable it for builds that warn-as-error
+#pragma warning(push)
+#pragma warning(disable : 4700)
+#endif
+
+COMPILER_RT_ABI di_int __fixxfdi(xf_float a) {
+  const di_int di_max = (di_int)((~(du_int)0) / 2);
+  const di_int di_min = -di_max - 1;
+  xf_bits fb;
+  fb.f = a;
+  int e = (fb.u.high.s.low & 0x00007FFF) - 16383;
+  if (e < 0)
+    return 0;
+  if ((unsigned)e >= sizeof(di_int) * CHAR_BIT)
+    return a > 0 ? di_max : di_min;
+  di_int s = -(si_int)((fb.u.high.s.low & 0x00008000) >> 15);
+  di_int r = fb.u.low.all;
+  r = (du_int)r >> (63 - e);
+  return (r ^ s) - s;
+}
+
+#if defined(_MSC_VER) && !defined(__clang__)
+#pragma warning(pop)
+#endif
+
+#endif // !_ARCH_PPC