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- /*
- * ====================================================
- * 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.
- * ====================================================
- */
- /*
- * wrapper scalb(double x, double fn) is provide for
- * passing various standard test suite. One
- * should use scalbn() instead.
- */
- #include <math.h>
- #include "math_private.h"
- #include <errno.h>
- #ifdef _SCALB_INT
- double scalb(double x, int fn) /* wrapper scalb */
- #else
- double scalb(double x, double fn) /* wrapper scalb */
- #endif
- {
- #ifdef _IEEE_LIBM
- return __ieee754_scalb(x,fn);
- #else
- double z;
- z = __ieee754_scalb(x,fn);
- if(_LIB_VERSION == _IEEE_) return z;
- if(!(isfinite(z)||isnan(z))&&isfinite(x)) {
- return __kernel_standard(x,(double)fn,32); /* scalb overflow */
- }
- if(z==0.0&&z!=x) {
- return __kernel_standard(x,(double)fn,33); /* scalb underflow */
- }
- #ifndef _SCALB_INT
- if(!isfinite(fn)) errno = ERANGE;
- #endif
- return z;
- #endif
- }
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