import newlib-2000-02-17 snapshot

1 files changed, 69 insertions, 0 deletions

diff --git a/newlib/libm/math/wf_acos.c b/newlib/libm/math/wf_acos.c
new file mode 100644
index 000000000..8a1037441
--- /dev/null
+++ b/newlib/libm/math/wf_acos.c
@@ -0,0 +1,69 @@
+/* wf_acos.c -- float version of w_acos.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.
+ * ====================================================
+ */
+
+/*
+ * wrap_acosf(x)
+ */
+
+#include "fdlibm.h"
+#include <errno.h>
+
+#ifdef _HAVE_STDC
+	float acosf(float x)		/* wrapper acosf */
+#else
+	float acosf(x)			/* wrapper acosf */
+	float x;
+#endif
+{
+#ifdef _IEEE_LIBM
+	return __ieee754_acosf(x);
+#else
+	float z;
+	struct exception exc;
+	z = __ieee754_acosf(x);
+	if(_LIB_VERSION == _IEEE_ || isnanf(x)) return z;
+	if(fabsf(x)>(float)1.0) {
+	    /* acosf(|x|>1) */
+	    exc.type = DOMAIN;
+	    exc.name = "acosf";
+	    exc.err = 0;
+	    exc.arg1 = exc.arg2 = (double)x;
+	    exc.retval = 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 acos(double x)
+#else
+	double acos(x)
+	double x;
+#endif
+{
+	return (double) acosf((float) x);
+}
+
+#endif /* defined(_DOUBLE_IS_32BITS) */