s_ceilf.c revision 2116
12116Sjkh/* s_ceilf.c -- float version of s_ceil.c. 22116Sjkh * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com. 32116Sjkh */ 42116Sjkh 52116Sjkh/* 62116Sjkh * ==================================================== 72116Sjkh * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. 82116Sjkh * 92116Sjkh * Developed at SunPro, a Sun Microsystems, Inc. business. 102116Sjkh * Permission to use, copy, modify, and distribute this 112116Sjkh * software is freely granted, provided that this notice 122116Sjkh * is preserved. 132116Sjkh * ==================================================== 142116Sjkh */ 152116Sjkh 162116Sjkh#ifndef lint 172116Sjkhstatic char rcsid[] = "$Id: s_ceilf.c,v 1.2 1994/08/18 23:06:30 jtc Exp $"; 182116Sjkh#endif 192116Sjkh 202116Sjkh#include "math.h" 212116Sjkh#include "math_private.h" 222116Sjkh 232116Sjkh#ifdef __STDC__ 242116Sjkhstatic const float huge = 1.0e30; 252116Sjkh#else 262116Sjkhstatic float huge = 1.0e30; 272116Sjkh#endif 282116Sjkh 292116Sjkh#ifdef __STDC__ 302116Sjkh float ceilf(float x) 312116Sjkh#else 322116Sjkh float ceilf(x) 332116Sjkh float x; 342116Sjkh#endif 352116Sjkh{ 362116Sjkh int32_t i0,j0; 372116Sjkh u_int32_t i; 382116Sjkh 392116Sjkh GET_FLOAT_WORD(i0,x); 402116Sjkh j0 = ((i0>>23)&0xff)-0x7f; 412116Sjkh if(j0<23) { 422116Sjkh if(j0<0) { /* raise inexact if x != 0 */ 432116Sjkh if(huge+x>(float)0.0) {/* return 0*sign(x) if |x|<1 */ 442116Sjkh if(i0<0) {i0=0x80000000;} 452116Sjkh else if(i0!=0) { i0=0x3f800000;} 462116Sjkh } 472116Sjkh } else { 482116Sjkh i = (0x007fffff)>>j0; 492116Sjkh if((i0&i)==0) return x; /* x is integral */ 502116Sjkh if(huge+x>(float)0.0) { /* raise inexact flag */ 512116Sjkh if(i0>0) i0 += (0x00800000)>>j0; 522116Sjkh i0 &= (~i); 532116Sjkh } 542116Sjkh } 552116Sjkh } else { 562116Sjkh if(j0==0x80) return x+x; /* inf or NaN */ 572116Sjkh else return x; /* x is integral */ 582116Sjkh } 592116Sjkh SET_FLOAT_WORD(x,i0); 602116Sjkh return x; 612116Sjkh} 62