Git conversion: Make reactos the root directory, move rosapps, rostests, wallpapers into modules, and delete rossubsys.

sdk/lib/crt/math/i386/atan2.c

@@ -0,0 +1,27 @@
+
+#include <math.h>
+
+double atan2 (double __y, double __x);
+
+/*
+ * @implemented
+ */
+double atan2 (double __y, double __x)
+{
+  register double __val;
+#ifdef __GNUC__
+  __asm __volatile__
+    ("fpatan\n\t"
+     "fld %%st(0)"
+     : "=t" (__val) : "0" (__x), "u" (__y));
+#else
+  __asm
+  {
+    fld __y
+    fld __x
+    fpatan
+    fstp __val
+  }
+#endif /*__GNUC__*/
+  return __val;
+}