xref: /illumos-gate/usr/src/lib/libm/common/R/coshf.c (revision ddc0e0b5)
125c28e83SPiotr Jasiukajtis /*
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2125c28e83SPiotr Jasiukajtis /*
2225c28e83SPiotr Jasiukajtis  * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
2325c28e83SPiotr Jasiukajtis  */
2425c28e83SPiotr Jasiukajtis /*
2525c28e83SPiotr Jasiukajtis  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
2625c28e83SPiotr Jasiukajtis  * Use is subject to license terms.
2725c28e83SPiotr Jasiukajtis  */
2825c28e83SPiotr Jasiukajtis 
29*ddc0e0b5SRichard Lowe #pragma weak __coshf = coshf
3025c28e83SPiotr Jasiukajtis 
3125c28e83SPiotr Jasiukajtis #include "libm.h"
3225c28e83SPiotr Jasiukajtis 
3325c28e83SPiotr Jasiukajtis float
coshf(float x)3425c28e83SPiotr Jasiukajtis coshf(float x) {
3525c28e83SPiotr Jasiukajtis 	double	c;
3625c28e83SPiotr Jasiukajtis 	float	w;
3725c28e83SPiotr Jasiukajtis 	int	ix;
3825c28e83SPiotr Jasiukajtis 
3925c28e83SPiotr Jasiukajtis 	ix = *(int *)&x & ~0x80000000;
4025c28e83SPiotr Jasiukajtis 	if (ix >= 0x7f800000) {
4125c28e83SPiotr Jasiukajtis 		/* coshf(x) is |x| if x is +-Inf or NaN */
4225c28e83SPiotr Jasiukajtis 		return (x * x);
4325c28e83SPiotr Jasiukajtis 	}
4425c28e83SPiotr Jasiukajtis 	if (ix >= 0x43000000)	/* coshf(x) trivially overflows */
4525c28e83SPiotr Jasiukajtis 		c = 1.0e100;
4625c28e83SPiotr Jasiukajtis 	else
4725c28e83SPiotr Jasiukajtis 		c = cosh((double)x);
4825c28e83SPiotr Jasiukajtis 	w = (float)c;
4925c28e83SPiotr Jasiukajtis 	return (w);
5025c28e83SPiotr Jasiukajtis }
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