sf_fabs.c

来自「标准c库代码,可以应用于各个系统提供了大量的基本函数」· C语言 代码 · 共 34 行

/* sf_fabs.c -- float version of s_fabs.c.
 * Conversion to float by Ian Lance Taylor, Cygnus Support, [e-mail].
 */

/*
 * ====================================================
 * 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.
 * ====================================================
 */

/*
 * fabsf(x) returns the absolute value of x.
 */

#include "fdlibm.h"

#ifdef __STDC__
	float fabsf(float x)
#else
	float fabsf(x)
	float x;
#endif
{
	__uint32_t ix;
	GET_FLOAT_WORD(ix,x);
	SET_FLOAT_WORD(x,ix&0x7fffffff);
        return x;
}