-/* @(#)e_cosh.c 5.1 93/09/24 */
/*
* ====================================================
* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
* ====================================================
*/
-#if defined(LIBM_SCCS) && !defined(lint)
-static char rcsid[] = "$NetBSD: e_cosh.c,v 1.7 1995/05/10 20:44:58 jtc Exp $";
-#endif
-
/* __ieee754_cosh(x)
* Method :
* mathematically cosh(x) if defined to be (exp(x)+exp(-x))/2
#include "math.h"
#include "math_private.h"
-#ifdef __STDC__
static const double one = 1.0, half=0.5, huge = 1.0e300;
-#else
-static double one = 1.0, half=0.5, huge = 1.0e300;
-#endif
-#ifdef __STDC__
- double __ieee754_cosh(double x)
-#else
- double __ieee754_cosh(x)
- double x;
-#endif
+double __ieee754_cosh(double x)
{
double t,w;
int32_t ix;
/* |x| > overflowthresold, cosh(x) overflow */
return huge*huge;
}
+
+/*
+ * wrapper cosh(x)
+ */
+#ifndef _IEEE_LIBM
+double cosh(double x)
+{
+ double z = __ieee754_cosh(x);
+ if (_LIB_VERSION == _IEEE_ || isnan(x))
+ return z;
+ if (fabs(x) > 7.10475860073943863426e+02)
+ return __kernel_standard(x, x, 5); /* cosh overflow */
+ return z;
+}
+#else
+strong_alias(__ieee754_cosh, cosh)
+#endif
+libm_hidden_def(cosh)