import newlib-2000-02-17 snapshot

newlib/libm/math/wf_cosh.c

@@ -0,0 +1,78 @@
+/* wf_cosh.c -- float version of w_cosh.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 coshf(x)
+ */
+
+#include "fdlibm.h"
+#include <errno.h>
+
+#ifdef __STDC__
+	float coshf(float x)		/* wrapper coshf */
+#else
+	float coshf(x)			/* wrapper coshf */
+	float x;
+#endif
+{
+#ifdef _IEEE_LIBM
+	return __ieee754_coshf(x);
+#else
+	float z;
+	struct exception exc;
+	z = __ieee754_coshf(x);
+	if(_LIB_VERSION == _IEEE_ || isnanf(x)) return z;
+	if(fabsf(x)>(float)8.9415985107e+01) {	
+	    /* coshf(finite) overflow */
+#ifndef HUGE_VAL
+#define HUGE_VAL inf
+	    double inf = 0.0;
+
+	    SET_HIGH_WORD(inf,0x7ff00000);	/* set inf to infinite */
+#endif
+	    exc.type = OVERFLOW;
+	    exc.name = "coshf";
+	    exc.err = 0;
+	    exc.arg1 = exc.arg2 = (double)x;
+	    if (_LIB_VERSION == _SVID_)
+	       exc.retval = HUGE;
+	    else
+	       exc.retval = HUGE_VAL;
+	    if (_LIB_VERSION == _POSIX_)
+	       errno = ERANGE;
+	    else if (!matherr(&exc)) {
+	       errno = ERANGE;
+	    }
+	    if (exc.err != 0)
+	       errno = exc.err;
+	    return (float)exc.retval;
+	} else
+	    return z;
+#endif
+}
+
+#ifdef _DOUBLE_IS_32BITS
+
+#ifdef __STDC__
+	double cosh(double x)
+#else
+	double cosh(x)
+	double x;
+#endif
+{
+	return (double) coshf((float) x);
+}
+
+#endif /* defined(_DOUBLE_IS_32BITS) */