import newlib-2000-02-17 snapshot

1 files changed, 120 insertions, 0 deletions

diff --git a/newlib/libm/math/w_sinh.c b/newlib/libm/math/w_sinh.c
new file mode 100644
index 000000000..02a388862
--- /dev/null
+++ b/newlib/libm/math/w_sinh.c
@@ -0,0 +1,120 @@
+
+/* @(#)w_sinh.c 5.1 93/09/24 */
+/*
+ * ====================================================
+ * 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.
+ * ====================================================
+ */
+
+
+/*
+FUNCTION
+        <<sinh>>, <<sinhf>>---hyperbolic sine
+
+INDEX
+	sinh
+INDEX
+	sinhf
+
+ANSI_SYNOPSIS
+        #include <math.h>
+        double sinh(double <[x]>);
+        float  sinhf(float <[x]>);
+
+TRAD_SYNOPSIS
+        #include <math.h>
+        double sinh(<[x]>)
+        double <[x]>;
+
+        float  sinhf(<[x]>)
+        float <[x]>;
+
+DESCRIPTION
+	<<sinh>> computes the hyperbolic sine of the argument <[x]>.
+	Angles are specified in radians.   <<sinh>>(<[x]>) is defined as 
+	@ifinfo
+	. (exp(<[x]>) - exp(-<[x]>))/2
+	@end ifinfo
+	@tex
+	$${e^x - e^{-x}}\over 2$$
+	@end tex
+
+	<<sinhf>> is identical, save that it takes and returns <<float>> values.
+
+RETURNS
+	The hyperbolic sine of <[x]> is returned.  
+
+	When the correct result is too large to be representable (an
+	overflow),  <<sinh>> returns <<HUGE_VAL>> with the
+	appropriate sign, and sets the global value <<errno>> to
+	<<ERANGE>>. 
+
+	You can modify error handling for these functions with <<matherr>>.
+
+PORTABILITY
+	<<sinh>> is ANSI C.  
+	<<sinhf>> is an extension.
+
+QUICKREF
+	sinh ansi pure
+	sinhf - pure
+*/
+
+/* 
+ * wrapper sinh(x)
+ */
+
+#include "fdlibm.h"
+#include <errno.h>
+
+#ifndef _DOUBLE_IS_32BITS
+
+#ifdef __STDC__
+	double sinh(double x)		/* wrapper sinh */
+#else
+	double sinh(x)			/* wrapper sinh */
+	double x;
+#endif
+{
+#ifdef _IEEE_LIBM
+	return __ieee754_sinh(x);
+#else
+	double z; 
+	struct exception exc;
+	z = __ieee754_sinh(x);
+	if(_LIB_VERSION == _IEEE_) return z;
+	if(!finite(z)&&finite(x)) {
+	    /* sinh(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 = "sinh";
+	    exc.err = 0;
+	    exc.arg1 = exc.arg2 = x;
+	    if (_LIB_VERSION == _SVID_)
+	       exc.retval = ( (x>0.0) ? HUGE : -HUGE);
+	    else
+	       exc.retval = ( (x>0.0) ? HUGE_VAL : -HUGE_VAL);
+	    if (_LIB_VERSION == _POSIX_)
+	       errno = ERANGE;
+	    else if (!matherr(&exc)) {
+	       errno = ERANGE;
+	    }
+	    if (exc.err != 0)
+	       errno = exc.err;
+            return exc.retval;
+	} else
+	    return z;
+#endif
+}
+
+#endif /* defined(_DOUBLE_IS_32BITS) */