w_scalbf.c - vx32 - Local 9vx git repository for patches.
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       ---
       w_scalbf.c (1443B)
       ---
            1 /* w_scalbf.c -- float version of w_scalb.c.
            2  * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
            3  */
            4 
            5 /*
            6  * ====================================================
            7  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
            8  *
            9  * Developed at SunPro, a Sun Microsystems, Inc. business.
           10  * Permission to use, copy, modify, and distribute this
           11  * software is freely granted, provided that this notice
           12  * is preserved.
           13  * ====================================================
           14  */
           15 
           16 #ifndef lint
           17 static char rcsid[] = "$FreeBSD: src/lib/msun/src/w_scalbf.c,v 1.7 2002/05/28 18:15:04 alfred Exp $";
           18 #endif
           19 
           20 /*
           21  * wrapper scalbf(float x, float fn) is provide for
           22  * passing various standard test suite. One
           23  * should use scalbn() instead.
           24  */
           25 
           26 #include "math.h"
           27 #include "math_private.h"
           28 
           29 #include <errno.h>
           30 
           31 #ifdef _SCALB_INT
           32 float
           33 scalbf(float x, int fn)                /* wrapper scalbf */
           34 #else
           35 float
           36 scalbf(float x, float fn)                /* wrapper scalbf */
           37 #endif
           38 {
           39 #ifdef _IEEE_LIBM
           40         return __ieee754_scalbf(x,fn);
           41 #else
           42         float z;
           43         z = __ieee754_scalbf(x,fn);
           44         if(_LIB_VERSION == _IEEE_) return z;
           45         if(!(finitef(z)||isnanf(z))&&finitef(x)) {
           46             /* scalbf overflow */
           47             return (float)__kernel_standard((double)x,(double)fn,132);
           48         }
           49         if(z==(float)0.0&&z!=x) {
           50             /* scalbf underflow */
           51             return (float)__kernel_standard((double)x,(double)fn,133);
           52         }
           53 #ifndef _SCALB_INT
           54         if(!finitef(fn)) errno = ERANGE;
           55 #endif
           56         return z;
           57 #endif
           58 }