Move alphaI to x22 to leave x18 unused (reserved on OSX)
@@ -49,7 +49,7 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#define pCRow3 x15
#define pA x16
#define alphaR x17
-#define alphaI x18
+#define alphaI x22
#define temp x19
#define tempOffset x20
#define tempK x21
