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Index: lib/libc/arm/gen/Makefile.inc
===================================================================
--- lib/libc/arm/gen/Makefile.inc
+++ lib/libc/arm/gen/Makefile.inc
@@ -1,7 +1,7 @@
# @(#)Makefile.inc 8.1 (Berkeley) 6/4/93
# $FreeBSD$
-SRCS+= _ctx_start.S _setjmp.S _set_tp.c alloca.S fabs.c \
+SRCS+= _ctx_start.S _setjmp.S _set_tp.c alloca.S fabs.S \
infinity.c ldexp.c makecontext.c \
__aeabi_read_tp.S setjmp.S signalcontext.c sigsetjmp.S flt_rounds.c \
arm_initfini.c \
Index: lib/libc/arm/gen/fabs.S
===================================================================
--- lib/libc/arm/gen/fabs.S
+++ lib/libc/arm/gen/fabs.S
@@ -1,7 +1,10 @@
-/* $NetBSD: fabs.c,v 1.2 2002/05/26 11:48:01 wiz Exp $ */
-
-/*
- * Copyright (c) 1996 Mark Brinicombe
+/*-
+ * Copyright (c) 2017 Andrew Turner
+ * All rights reserved.
+ *
+ * This software was developed by SRI International and the University of
+ * Cambridge Computer Laboratory under DARPA/AFRL contract FA8750-10-C-0237
+ * ("CTSRD"), as part of the DARPA CRASH research programme.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
@@ -11,12 +14,6 @@
* 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.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by Mark Brinicombe
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
@@ -31,16 +28,16 @@
* SUCH DAMAGE.
*/
-/*
- * fabs(x) returns the absolute value of x.
- */
-#include <sys/cdefs.h>
+#include <machine/asm.h>
__FBSDID("$FreeBSD$");
-double
-fabs(double x)
-{
- if (x < 0)
- x = -x;
- return(x);
-}
+ENTRY(fabs)
+#if __ARM_ARCH >= 6
+ vabs.f64 d0, d0
+#elif __ARM_BIG_ENDIAN
+ bic r0, r0, #(1 << 31)
+#else
+ bic r1, r1, #(1 << 31)
+#endif
+ RET
+END(fabs)

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