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-rw-r--r--sysdeps/libm-ieee754/s_asinhf.c58
1 files changed, 58 insertions, 0 deletions
diff --git a/sysdeps/libm-ieee754/s_asinhf.c b/sysdeps/libm-ieee754/s_asinhf.c
new file mode 100644
index 0000000000..d57508de9f
--- /dev/null
+++ b/sysdeps/libm-ieee754/s_asinhf.c
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+/* s_asinhf.c -- float version of s_asinh.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.
+ * ====================================================
+ */
+
+#if defined(LIBM_SCCS) && !defined(lint)
+static char rcsid[] = "$NetBSD: s_asinhf.c,v 1.5 1995/05/12 04:57:39 jtc Exp $";
+#endif
+
+#include "math.h"
+#include "math_private.h"
+
+#ifdef __STDC__
+static const float 
+#else
+static float 
+#endif
+one =  1.0000000000e+00, /* 0x3F800000 */
+ln2 =  6.9314718246e-01, /* 0x3f317218 */
+huge=  1.0000000000e+30; 
+
+#ifdef __STDC__
+	float __asinhf(float x)
+#else
+	float __asinhf(x)
+	float x;
+#endif
+{	
+	float t,w;
+	int32_t hx,ix;
+	GET_FLOAT_WORD(hx,x);
+	ix = hx&0x7fffffff;
+	if(ix>=0x7f800000) return x+x;	/* x is inf or NaN */
+	if(ix< 0x31800000) {	/* |x|<2**-28 */
+	    if(huge+x>one) return x;	/* return x inexact except 0 */
+	} 
+	if(ix>0x4d800000) {	/* |x| > 2**28 */
+	    w = __ieee754_logf(fabsf(x))+ln2;
+	} else if (ix>0x40000000) {	/* 2**28 > |x| > 2.0 */
+	    t = fabsf(x);
+	    w = __ieee754_logf((float)2.0*t+one/(__ieee754_sqrtf(x*x+one)+t));
+	} else {		/* 2.0 > |x| > 2**-28 */
+	    t = x*x;
+	    w =__log1pf(fabsf(x)+t/(one+__ieee754_sqrtf(one+t)));
+	}
+	if(hx>0) return w; else return -w;
+}
+weak_alias (__asinhf, asinhf)