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11210 libm should be cstyle(1ONBLD) clean
@@ -20,18 +20,19 @@
*/
/*
* Copyright 2011 Nexenta Systems, Inc. All rights reserved.
*/
+
/*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma weak __asinh = asinh
-/* INDENT OFF */
+
/*
* asinh(x)
* Method :
* Based on
* asinh(x) = sign(x) * log [ |x| + sqrt(x*x+1) ]
@@ -39,42 +40,48 @@
* asinh(x) := x if 1+x*x == 1,
* := sign(x)*(log(x)+ln2)) for large |x|, else
* := sign(x)*log(2|x|+1/(|x|+sqrt(x*x+1))) if|x| > 2, else
* := sign(x)*log1p(|x|+x^2/(1+sqrt(1+x^2)))
*/
-/* INDENT ON */
#include "libm_macros.h"
#include <math.h>
static const double xxx[] = {
-/* one */ 1.00000000000000000000e+00, /* 3FF00000, 00000000 */
+/* one */
+ 1.00000000000000000000e+00, /* 3FF00000, 00000000 */
/* ln2 */ 6.93147180559945286227e-01, /* 3FE62E42, FEFA39EF */
/* huge */ 1.00000000000000000000e+300
};
+
#define one xxx[0]
#define ln2 xxx[1]
#define huge xxx[2]
double
-asinh(double x) {
+asinh(double x)
+{
double t, w;
int hx, ix;
- hx = ((int *) &x)[HIWORD];
+ hx = ((int *)&x)[HIWORD];
ix = hx & 0x7fffffff;
+
if (ix >= 0x7ff00000)
#if defined(FPADD_TRAPS_INCOMPLETE_ON_NAN)
return (ix >= 0x7ff80000 ? x : x + x);
+
/* assumes sparc-like QNaN */
#else
return (x + x); /* x is inf or NaN */
#endif
+
if (ix < 0x3e300000) { /* |x|<2**-28 */
if (huge + x > one)
return (x); /* return x inexact except 0 */
}
+
if (ix > 0x41b00000) { /* |x| > 2**28 */
w = log(fabs(x)) + ln2;
} else if (ix > 0x40000000) {
/* 2**28 > |x| > 2.0 */
t = fabs(x);
@@ -82,7 +89,8 @@
} else {
/* 2.0 > |x| > 2**-28 */
t = x * x;
w = log1p(fabs(x) + t / (one + sqrt(one + t)));
}
+
return (hx > 0 ? w : -w);
}