1 files changed, 58 insertions, 0 deletions
diff --git a/lib/divsc3.c b/lib/divsc3.c
new file mode 100644
index 000000000..bea15cdc4
--- /dev/null
+++ b/lib/divsc3.c
@@ -0,0 +1,58 @@
+//===-- divsc3.c - Implement __divsc3 -------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements __divsc3 for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
+
+#include "int_lib.h"
+#include <math.h>
+#include <complex.h>
+
+// Returns: the quotient of (a + ib) / (c + id)
+
+float _Complex
+__divsc3(float __a, float __b, float __c, float __d)
+{
+    int __ilogbw = 0;
+    float __logbw = logbf(fmaxf(fabsf(__c), fabsf(__d)));
+    if (isfinite(__logbw))
+    {
+        __ilogbw = (int)__logbw;
+        __c = scalbnf(__c, -__ilogbw);
+        __d = scalbnf(__d, -__ilogbw);
+    }
+    float __denom = __c * __c + __d * __d;
+    float _Complex z;
+    __real__ z = scalbnf((__a * __c + __b * __d) / __denom, -__ilogbw);
+    __imag__ z = scalbnf((__b * __c - __a * __d) / __denom, -__ilogbw);
+    if (isnan(__real__ z) && isnan(__imag__ z))
+    {
+        if ((__denom == 0) && (!isnan(__a) || !isnan(__b)))
+        {
+            __real__ z = copysignf(INFINITY, __c) * __a;
+            __imag__ z = copysignf(INFINITY, __c) * __b;
+        }
+        else if ((isinf(__a) || isinf(__b)) && isfinite(__c) && isfinite(__d))
+        {
+            __a = copysignf(isinf(__a) ? 1 : 0, __a);
+            __b = copysignf(isinf(__b) ? 1 : 0, __b);
+            __real__ z = INFINITY * (__a * __c + __b * __d);
+            __imag__ z = INFINITY * (__b * __c - __a * __d);
+        }
+        else if (isinf(__logbw) && __logbw > 0 && isfinite(__a) && isfinite(__b))
+        {
+            __c = copysignf(isinf(__c) ? 1 : 0, __c);
+            __d = copysignf(isinf(__d) ? 1 : 0, __d);
+            __real__ z = 0 * (__a * __c + __b * __d);
+            __imag__ z = 0 * (__b * __c - __a * __d);
+        }
+    }
+    return z;
+}