mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-23 05:20:06 +00:00
f7eac6eb50
* Makeconfig ($(common-objpfx)config.make): Depend on config.h.in. Mon Mar 4 17:35:09 1996 Roland McGrath <roland@charlie-brown.gnu.ai.mit.edu> * hurd/catch-signal.c (hurd_safe_memmove): New function. (hurd_safe_copyin, hurd_safe_copyout): New functions. * hurd/hurd/sigpreempt.h: Declare them. Sun Mar 3 08:43:44 1996 Roland McGrath <roland@charlie-brown.gnu.ai.mit.edu> Replace math code with fdlibm from Sun as modified for netbsd by JT Conklin and Ian Taylor, including x86 FPU support. * sysdeps/libm-ieee754, sysdeps/libm-i387: New directories. * math/math_private.h: New file. * sysdeps/i386/fpu/Implies: New file. * sysdeps/ieee754/Implies: New file. * math/machine/asm.h, math/machine/endian.h: New files. * math/Makefile, math/math.h: Rewritten. * mathcalls.h, math/mathcalls.h: New file, broken out of math.h. * math/finite.c: File removed. * sysdeps/generic/Makefile [$(subdir)=math]: Frobnication removed. * math/test-math.c: Include errno.h and string.h. * sysdeps/unix/bsd/dirstream.h: File removed. * sysdeps/unix/bsd/readdir.c: File removed.
56 lines
1.3 KiB
C
56 lines
1.3 KiB
C
/* @(#)e_scalb.c 5.1 93/09/24 */
|
|
/*
|
|
* ====================================================
|
|
* 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.
|
|
* ====================================================
|
|
*/
|
|
|
|
#if defined(LIBM_SCCS) && !defined(lint)
|
|
static char rcsid[] = "$NetBSD: e_scalb.c,v 1.6 1995/05/10 20:46:09 jtc Exp $";
|
|
#endif
|
|
|
|
/*
|
|
* __ieee754_scalb(x, fn) is provide for
|
|
* passing various standard test suite. One
|
|
* should use scalbn() instead.
|
|
*/
|
|
|
|
#include "math.h"
|
|
#include "math_private.h"
|
|
|
|
#ifdef _SCALB_INT
|
|
#ifdef __STDC__
|
|
double __ieee754_scalb(double x, int fn)
|
|
#else
|
|
double __ieee754_scalb(x,fn)
|
|
double x; int fn;
|
|
#endif
|
|
#else
|
|
#ifdef __STDC__
|
|
double __ieee754_scalb(double x, double fn)
|
|
#else
|
|
double __ieee754_scalb(x,fn)
|
|
double x, fn;
|
|
#endif
|
|
#endif
|
|
{
|
|
#ifdef _SCALB_INT
|
|
return scalbn(x,fn);
|
|
#else
|
|
if (isnan(x)||isnan(fn)) return x*fn;
|
|
if (!finite(fn)) {
|
|
if(fn>0.0) return x*fn;
|
|
else return x/(-fn);
|
|
}
|
|
if (rint(fn)!=fn) return (fn-fn)/(fn-fn);
|
|
if ( fn > 65000.0) return scalbn(x, 65000);
|
|
if (-fn > 65000.0) return scalbn(x,-65000);
|
|
return scalbn(x,(int)fn);
|
|
#endif
|
|
}
|