s_significand.c
来自「基于组件方式开发操作系统的OSKIT源代码」· C语言 代码 · 共 35 行
C
35 行
/* @(#)s_signif.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. * ==================================================== */#ifndef lintstatic char rcsid[] = "$Id: s_significand.c,v 1.5 1997/02/22 15:11:42 peter Exp $";#endif/* * significand(x) computes just * scalb(x, (double) -ilogb(x)), * for exercising the fraction-part(F) IEEE 754-1985 test vector. */#include "math.h"#include "math_private.h"#ifdef __STDC__ double __generic_significand(double x)#else double __generic_significand(x) double x;#endif{ return __ieee754_scalb(x,(double) -ilogb(x));}
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