Index: lib/libc/aarch64/Symbol.map
===================================================================
--- lib/libc/aarch64/Symbol.map
+++ lib/libc/aarch64/Symbol.map
@@ -13,6 +13,7 @@
 
 	_setjmp;
 	_longjmp;
+	fabs;
 	setjmp;
 	longjmp;
 	sigsetjmp;
Index: lib/libc/aarch64/gen/Makefile.inc
===================================================================
--- lib/libc/aarch64/gen/Makefile.inc
+++ lib/libc/aarch64/gen/Makefile.inc
@@ -1,6 +1,7 @@
 # $FreeBSD$
 
-SRCS+=	flt_rounds.c \
+SRCS+=	fabs.S \
+	flt_rounds.c \
 	ldexp.c \
 	_setjmp.S \
 	_set_tp.c \
Index: lib/libc/aarch64/gen/fabs.S
===================================================================
--- /dev/null
+++ lib/libc/aarch64/gen/fabs.S
@@ -0,0 +1,32 @@
+/*-
+ * Copyright (c) 2015 The FreeBSD Foundation
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <machine/asm.h>
+__FBSDID("$FreeBSD$");
+
+ENTRY(fabs)
+	fabs d0, d0
+END(fabs)