[PATCH] PPC64 Use hardware sqrt.

[Steve Munroe <sjmunroe at us dot ibm dot com>]

w_sqrt and w_sqrtf coded in assembler to take advantage of the "optional 
instruction" fsqrt, which is implememented for all PPC64 processors.
2004-04-29  Steven Munroe  <sjmunroe@us.ibm.com>

	* sysdeps/powerpc/powerpc64/fpu/w_sqrt.S: New file.
	* sysdeps/powerpc/powerpc64/fpu/w_sqrtf.S: New file.


diff -urN libc23-cvstip-20040412/sysdeps/powerpc/powerpc64/fpu/w_sqrt.S libc23/sysdeps/powerpc/powerpc64/fpu/w_sqrt.S
--- libc23-cvstip-20040412/sysdeps/powerpc/powerpc64/fpu/w_sqrt.S	Wed Dec 31 17:00:00 1969
+++ libc23/sysdeps/powerpc/powerpc64/fpu/w_sqrt.S	Fri Apr 23 15:01:21 2004
@@ -0,0 +1,39 @@
+/* Double square root.  PowerPC64 version.
+   Copyright (C) 2004 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, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+/* This has been coded in assembler to take advantage of the "optional
+   instruction" fsqrt, which is implememented for all PPC64 processors.  */
+
+#include <sysdep.h>
+
+ENTRY(__sqrt)
+	fsqrt   fp1,fp1
+	blr
+	END (__sqrt)
+
+weak_alias(__sqrt,sqrt)
+
+/* Strictly, this is wrong, but the only places where _ieee754_sqrt is
+   used will not pass in a negative result.  */
+strong_alias(__sqrt,__ieee754_sqrt)
+
+#ifdef NO_LONG_DOUBLE
+weak_alias(__sqrt,sqrtl)
+strong_alias(__sqrt,__sqrtl)
+#endif
diff -urN libc23-cvstip-20040412/sysdeps/powerpc/powerpc64/fpu/w_sqrtf.S libc23/sysdeps/powerpc/powerpc64/fpu/w_sqrtf.S
--- libc23-cvstip-20040412/sysdeps/powerpc/powerpc64/fpu/w_sqrtf.S	Wed Dec 31 17:00:00 1969
+++ libc23/sysdeps/powerpc/powerpc64/fpu/w_sqrtf.S	Fri Apr 23 15:02:29 2004
@@ -0,0 +1,35 @@
+/* Float square root.  PowerPC64 version.
+   Copyright (C) 2004 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, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+/* This has been coded in assembler to take advantage of the "optional
+   instruction" fsqrts, which is implememented for all PPC64 processors.  */
+
+#include <sysdep.h>
+
+ENTRY(__sqrtf)
+	fsqrts  fp1,fp1
+	blr
+	END (__sqrtf)
+
+weak_alias(__sqrtf,sqrtf)
+
+/* Strictly, this is wrong, but the only places where _ieee754_sqrt is
+   used will not pass in a negative result.  */
+strong_alias(__sqrtf,__ieee754_sqrtf)
+