[PATCH][AArch64] Inline __ieee754_sqrt(f)

["Wilco Dijkstra" <wdijkstr at arm dot com>]

Inline __ieee754_sqrt and __ieee754_sqrtf. Also add external definitions.

OK for commit?

2015-04-15  Wilco Dijkstra  <wdijkstr@arm.com>

	* sysdeps/aarch64/fpu/math_private.h (__ieee754_sqrt):
	New function.  (__ieee754_sqrtf): New function.
	* sysdeps/aarch64/fpu/e_sqrt.c (__ieee754_sqrt):
	New function.
	* sysdeps/aarch64/fpu/e_sqrtf.c (__ieee754_sqrtf):
	New function.

---
 sysdeps/aarch64/fpu/e_sqrt.c       | 28 ++++++++++++++++++++++++++++
 sysdeps/aarch64/fpu/e_sqrtf.c      | 28 ++++++++++++++++++++++++++++
 sysdeps/aarch64/fpu/math_private.h | 16 ++++++++++++++++
 3 files changed, 72 insertions(+)
 create mode 100644 sysdeps/aarch64/fpu/e_sqrt.c
 create mode 100644 sysdeps/aarch64/fpu/e_sqrtf.c

diff --git a/sysdeps/aarch64/fpu/e_sqrt.c b/sysdeps/aarch64/fpu/e_sqrt.c
new file mode 100644
index 0000000..4f11ca2
--- /dev/null
+++ b/sysdeps/aarch64/fpu/e_sqrt.c
@@ -0,0 +1,28 @@
+/* Square root of floating point number.
+   Copyright (C) 2015 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/>.  */
+
+#include <math_private.h>
+
+double
+__ieee754_sqrt (double d)
+{
+  double res;
+  asm ("fsqrt   %d0, %d1" : "=w" (res) : "w" (d));
+  return res;
+}
+strong_alias (__ieee754_sqrt, __sqrt_finite)
diff --git a/sysdeps/aarch64/fpu/e_sqrtf.c b/sysdeps/aarch64/fpu/e_sqrtf.c
new file mode 100644
index 0000000..a2e99e1
--- /dev/null
+++ b/sysdeps/aarch64/fpu/e_sqrtf.c
@@ -0,0 +1,28 @@
+/* Single-precision floating point square root.
+   Copyright (C) 2015 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/>.  */
+
+#include <math_private.h>
+
+float
+__ieee754_sqrtf (float s)
+{
+  float res;
+  asm ("fsqrt   %s0, %s1" : "=w" (res) : "w" (s));
+  return res;
+}
+strong_alias (__ieee754_sqrtf, __sqrtf_finite)
diff --git a/sysdeps/aarch64/fpu/math_private.h b/sysdeps/aarch64/fpu/math_private.h
index 52a6ad9..b3c2509 100644
--- a/sysdeps/aarch64/fpu/math_private.h
+++ b/sysdeps/aarch64/fpu/math_private.h
@@ -22,6 +22,22 @@
 #include <fenv.h>
 #include <fpu_control.h>
 
+extern __always_inline double
+__ieee754_sqrt (double d)
+{
+  double res;
+  asm __volatile__ ("fsqrt   %d0, %d1" : "=w" (res) : "w" (d));
+  return res;
+}
+
+extern __always_inline float
+__ieee754_sqrtf (float s)
+{
+  float res;
+  asm __volatile__ ("fsqrt   %s0, %s1" : "=w" (res) : "w" (s));
+  return res;
+}
+
 static __always_inline void
 libc_feholdexcept_aarch64 (fenv_t *envp)
 {
-- 
1.9.1