Implement sqrtf(), needed for libstdc++ on arm

 -Erik

1 files changed, 46 insertions, 0 deletions

diff --git a/libm/w_sqrtf.c b/libm/w_sqrtf.c
new file mode 100644
index 000000000..771d5b198
--- /dev/null
+++ b/libm/w_sqrtf.c
@@ -0,0 +1,46 @@
+/* vi: set sw=4 ts=4: */
+/* sqrtf for uClibc
+ *
+ * Copyright (C) 2002 by Erik Andersen <andersen@uclibc.org>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Library General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program 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 Library General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Library General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+/* 
+ * wrapper for sqrt(x)
+ */
+
+#include "math.h"
+#include "math_private.h"
+
+#ifdef __STDC__
+	float sqrtf(float x)		/* wrapper sqrt */
+#else
+	float sqrtf(x)			/* wrapper sqrt */
+	float x;
+#endif
+{
+#ifdef _IEEE_LIBM
+	return __ieee754_sqrt(x);
+#else
+	float z;
+	z = __ieee754_sqrt(x);
+	if(_LIB_VERSION == _IEEE_ || isnan(x)) return z;
+	if(x<0.0) {
+	    return __kernel_standard(x,x,26); /* sqrt(negative) */
+	} else
+	    return z;
+#endif
+}