first commit of the new libm!

[musl] / src / math / e_coshf.c

diff --git a/src/math/e_coshf.c b/src/math/e_coshf.c
deleted file mode 100644 (file)
index 6db1088..0000000
--- a/src/math/e_coshf.c
+++ /dev/null
@@ -1,59 +0,0 @@
-/* e_coshf.c -- float version of e_cosh.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.
- * ====================================================
- */
-
-#include <math.h>
-#include "math_private.h"
-
-static const float one = 1.0, half=0.5, huge = 1.0e30;
-
-float
-coshf(float x)
-{
-        float t,w;
-        int32_t ix;
-
-        GET_FLOAT_WORD(ix,x);
-        ix &= 0x7fffffff;
-
-    /* x is INF or NaN */
-        if(ix>=0x7f800000) return x*x;
-
-    /* |x| in [0,0.5*ln2], return 1+expm1(|x|)^2/(2*exp(|x|)) */
-        if(ix<0x3eb17218) {
-            t = expm1f(fabsf(x));
-            w = one+t;
-            if (ix<0x24000000) return w;        /* cosh(tiny) = 1 */
-            return one+(t*t)/(w+w);
-        }
-
-    /* |x| in [0.5*ln2,22], return (exp(|x|)+1/exp(|x|)/2; */
-        if (ix < 0x41b00000) {
-                t = expf(fabsf(x));
-                return half*t+half/t;
-        }
-
-    /* |x| in [22, log(maxdouble)] return half*exp(|x|) */
-        if (ix < 0x42b17180)  return half*expf(fabsf(x));
-
-    /* |x| in [log(maxdouble), overflowthresold] */
-        if (ix<=0x42b2d4fc) {
-            w = expf(half*fabsf(x));
-            t = half*w;
-            return t*w;
-        }
-
-    /* |x| > overflowthresold, cosh(x) overflow */
-        return huge*huge;
-}