import newlib-2000-02-17 snapshot

1 files changed, 72 insertions, 0 deletions

diff --git a/newlib/libm/math/wf_sqrt.c b/newlib/libm/math/wf_sqrt.c
new file mode 100644
index 000000000..6e792c923
--- /dev/null
+++ b/newlib/libm/math/wf_sqrt.c
@@ -0,0 +1,72 @@
+/* wf_sqrt.c -- float version of w_sqrt.c.
+ * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
+ */
+
+/*
+ * ====================================================
+ * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
+ *
+ * Developed at SunPro, a Sun Microsystems, Inc. business.
+ * Permission to use, copy, modify, and distribute this
+ * software is freely granted, provided that this notice 
+ * is preserved.
+ * ====================================================
+ */
+
+/* 
+ * wrapper sqrtf(x)
+ */
+
+#include "fdlibm.h"
+#include <errno.h>
+
+#ifdef __STDC__
+	float sqrtf(float x)		/* wrapper sqrtf */
+#else
+	float sqrtf(x)			/* wrapper sqrtf */
+	float x;
+#endif
+{
+#ifdef _IEEE_LIBM
+	return __ieee754_sqrtf(x);
+#else
+	float z;
+	struct exception exc;
+	z = __ieee754_sqrtf(x);
+	if(_LIB_VERSION == _IEEE_ || isnanf(x)) return z;
+	if(x<(float)0.0) {
+            /* sqrtf(negative) */
+            exc.type = DOMAIN;
+            exc.name = "sqrtf";
+	    exc.err = 0;
+	    exc.arg1 = exc.arg2 = (double)x;
+            if (_LIB_VERSION == _SVID_)
+              exc.retval = 0.0;
+            else
+              exc.retval = 0.0/0.0;
+            if (_LIB_VERSION == _POSIX_) 
+              errno = EDOM;
+            else if (!matherr(&exc)) {
+              errno = EDOM;
+            }
+            if (exc.err != 0)
+	      errno = exc.err;
+	    return (float)exc.retval; 
+	} else
+	    return z;
+#endif
+}
+
+#ifdef _DOUBLE_IS_32BITS
+
+#ifdef __STDC__
+	double sqrt(double x)
+#else
+	double sqrt(x)
+	double x;
+#endif
+{
+	return (double) sqrtf((float) x);
+}
+
+#endif /* defined(_DOUBLE_IS_32BITS) */