Sync with upstream FreeBSD libm.

Change-Id: I97e9b23903f1d993d84825806065e85626007d31
diff --git a/libm/upstream-freebsd/lib/msun/src/k_expf.c b/libm/upstream-freebsd/lib/msun/src/k_expf.c
index 548a008..8fe8c46 100644
--- a/libm/upstream-freebsd/lib/msun/src/k_expf.c
+++ b/libm/upstream-freebsd/lib/msun/src/k_expf.c
@@ -25,7 +25,7 @@
  */
 
 #include <sys/cdefs.h>
-__FBSDID("$FreeBSD$");
+__FBSDID("$FreeBSD: head/lib/msun/src/k_expf.c 275819 2014-12-16 09:21:56Z ed $");
 
 #include <complex.h>
 
@@ -82,6 +82,6 @@
 	half_expt = expt - half_expt;
 	SET_FLOAT_WORD(scale2, (0x7f + half_expt) << 23);
 
-	return (cpackf(cosf(y) * exp_x * scale1 * scale2,
+	return (CMPLXF(cosf(y) * exp_x * scale1 * scale2,
 	    sinf(y) * exp_x * scale1 * scale2));
 }