1 files changed, 45 insertions, 0 deletions
diff --git a/sysdeps/arm/e_sqrt.c b/sysdeps/arm/e_sqrt.c
new file mode 100644
index 0000000000..44e0414306
--- /dev/null
+++ b/sysdeps/arm/e_sqrt.c
@@ -0,0 +1,45 @@
+/* Compute square root for double.  ARM version.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifdef __SOFTFP__
+
+/* Use architecture-indendent sqrt implementation.  */
+# include <sysdeps/ieee754/dbl-64/e_sqrt.c>
+
+#else
+
+/* Use VFP square root instruction.  */
+# include <math.h>
+# include <sysdep.h>
+
+double
+__ieee754_sqrt (double x)
+{
+  double ret;
+# if __ARM_ARCH >= 6
+  asm ("vsqrt.f64 %P0, %P1" : "=w" (ret) : "w" (x));
+# else
+  /* As in GCC, for VFP9 Erratum 760019 avoid overwriting the
+     input.  */
+  asm ("vsqrt.f64 %P0, %P1" : "=&w" (ret) : "w" (x));
+# endif
+  return ret;
+}
+strong_alias (__ieee754_sqrt, __sqrt_finite)
+
+#endif