2 * ====================================================
3 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
5 * Developed at SunPro, a Sun Microsystems, Inc. business.
6 * Permission to use, copy, modify, and distribute this
7 * software is freely granted, provided that this notice
9 * ====================================================
13 * __ieee754_scalb(x, fn) is provide for
14 * passing various standard test suite. One
15 * should use scalbn() instead.
19 #include "math_private.h"
22 double attribute_hidden
__ieee754_scalb(double x
, double fn
)
25 if (isnan(x
)||isnan(fn
)) return x
*fn
;
27 if(fn
>0.0) return x
*fn
;
30 if (rint(fn
)!=fn
) return (fn
-fn
)/(fn
-fn
);
31 if ( fn
> 65000.0) return scalbn(x
, 65000);
32 if (-fn
> 65000.0) return scalbn(x
,-65000);
33 return scalbn(x
,(int)fn
);
36 #if defined __UCLIBC_SUSV3_LEGACY__
38 * wrapper scalb(double x, double fn) is provide for
39 * passing various standard test suite. One
40 * should use scalbn() instead.
43 double scalb(double x
, double fn
)
45 double z
= __ieee754_scalb(x
, fn
);
46 if (_LIB_VERSION
== _IEEE_
)
48 if (!(isfinite(z
) || isnan(z
)) && isfinite(x
))
49 return __kernel_standard(x
, (double)fn
, 32); /* scalb overflow */
50 if (z
== 0.0 && z
!= x
)
51 return __kernel_standard(x
, (double)fn
, 33); /* scalb underflow */
57 strong_alias(__ieee754_scalb
, scalb
)
60 #endif /* UCLIBC_SUSV3_LEGACY */