1 files changed, 55 insertions, 0 deletions
diff --git a/contrib/llvm-project/compiler-rt/lib/builtins/divxc3.c b/contrib/llvm-project/compiler-rt/lib/builtins/divxc3.c
new file mode 100644
index 000000000000..97ffd2eac211
--- /dev/null
+++ b/contrib/llvm-project/compiler-rt/lib/builtins/divxc3.c
@@ -0,0 +1,55 @@
+//===-- divxc3.c - Implement __divxc3 -------------------------------------===//
+//
+// 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 __divxc3 for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
+
+#if !_ARCH_PPC
+
+#include "int_lib.h"
+#include "int_math.h"
+
+// Returns: the quotient of (a + ib) / (c + id)
+
+COMPILER_RT_ABI Lcomplex __divxc3(long double __a, long double __b,
+                                  long double __c, long double __d) {
+  int __ilogbw = 0;
+  long double __logbw = crt_logbl(crt_fmaxl(crt_fabsl(__c), crt_fabsl(__d)));
+  if (crt_isfinite(__logbw)) {
+    __ilogbw = (int)__logbw;
+    __c = crt_scalbnl(__c, -__ilogbw);
+    __d = crt_scalbnl(__d, -__ilogbw);
+  }
+  long double __denom = __c * __c + __d * __d;
+  Lcomplex z;
+  COMPLEX_REAL(z) = crt_scalbnl((__a * __c + __b * __d) / __denom, -__ilogbw);
+  COMPLEX_IMAGINARY(z) =
+      crt_scalbnl((__b * __c - __a * __d) / __denom, -__ilogbw);
+  if (crt_isnan(COMPLEX_REAL(z)) && crt_isnan(COMPLEX_IMAGINARY(z))) {
+    if ((__denom == 0) && (!crt_isnan(__a) || !crt_isnan(__b))) {
+      COMPLEX_REAL(z) = crt_copysignl(CRT_INFINITY, __c) * __a;
+      COMPLEX_IMAGINARY(z) = crt_copysignl(CRT_INFINITY, __c) * __b;
+    } else if ((crt_isinf(__a) || crt_isinf(__b)) && crt_isfinite(__c) &&
+               crt_isfinite(__d)) {
+      __a = crt_copysignl(crt_isinf(__a) ? 1 : 0, __a);
+      __b = crt_copysignl(crt_isinf(__b) ? 1 : 0, __b);
+      COMPLEX_REAL(z) = CRT_INFINITY * (__a * __c + __b * __d);
+      COMPLEX_IMAGINARY(z) = CRT_INFINITY * (__b * __c - __a * __d);
+    } else if (crt_isinf(__logbw) && __logbw > 0 && crt_isfinite(__a) &&
+               crt_isfinite(__b)) {
+      __c = crt_copysignl(crt_isinf(__c) ? 1 : 0, __c);
+      __d = crt_copysignl(crt_isinf(__d) ? 1 : 0, __d);
+      COMPLEX_REAL(z) = 0 * (__a * __c + __b * __d);
+      COMPLEX_IMAGINARY(z) = 0 * (__b * __c - __a * __d);
+    }
+  }
+  return z;
+}
+
+#endif