1 files changed, 63 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/ieee754/flt-32/e_coshf.c b/REORG.TODO/sysdeps/ieee754/flt-32/e_coshf.c
new file mode 100644
index 0000000000..7b223758e1
--- /dev/null
+++ b/REORG.TODO/sysdeps/ieee754/flt-32/e_coshf.c
@@ -0,0 +1,63 @@
+/* e_coshf.c -- float version of e_cosh.c.
+ * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
+ * Optimizations by Ulrich Drepper <drepper@gmail.com>, 2011
+ */
+
+/*
+ * ====================================================
+ * 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.
+ * ====================================================
+ */
+
+#include <math.h>
+#include <math_private.h>
+
+static const float huge = 1.0e30;
+static const float one = 1.0, half=0.5;
+
+float
+__ieee754_coshf (float x)
+{
+	float t,w;
+	int32_t ix;
+
+	GET_FLOAT_WORD(ix,x);
+	ix &= 0x7fffffff;
+
+    /* |x| in [0,22] */
+	if (ix < 0x41b00000) {
+	    /* |x| in [0,0.5*ln2], return 1+expm1(|x|)^2/(2*exp(|x|)) */
+		if(ix<0x3eb17218) {
+		    if (ix<0x24000000) return one;	/* cosh(tiny) = 1 */
+		    t = __expm1f(fabsf(x));
+		    w = one+t;
+		    return one+(t*t)/(w+w);
+		}
+
+	    /* |x| in [0.5*ln2,22], return (exp(|x|)+1/exp(|x|)/2; */
+		t = __ieee754_expf(fabsf(x));
+		return half*t+half/t;
+	}
+
+    /* |x| in [22, log(maxdouble)] return half*exp(|x|) */
+	if (ix < 0x42b17180)  return half*__ieee754_expf(fabsf(x));
+
+    /* |x| in [log(maxdouble), overflowthresold] */
+	if (ix<=0x42b2d4fc) {
+	    w = __ieee754_expf(half*fabsf(x));
+	    t = half*w;
+	    return t*w;
+	}
+
+    /* x is INF or NaN */
+	if(ix>=0x7f800000) return x*x;
+
+    /* |x| > overflowthresold, cosh(x) overflow */
+	return math_narrow_eval (huge*huge);
+}
+strong_alias (__ieee754_coshf, __coshf_finite)