/* s_rintf.c -- float version of s_rint.c. * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com. */ /* * ==================================================== * 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. * ==================================================== */ #include #if defined(LIBM_SCCS) && !defined(lint) __RCSID("$NetBSD: s_rintf.c,v 1.9 2008/04/25 22:21:53 christos Exp $"); #endif #include "math.h" #include "math_private.h" static const float TWO23[2]={ 8.3886080000e+06, /* 0x4b000000 */ -8.3886080000e+06, /* 0xcb000000 */ }; float rintf(float x) { int32_t i0,jj0,sx; u_int32_t i,i1; #ifdef __i386__ /* XXX gcc4 will omit the rounding otherwise */ volatile #endif float w; float t; GET_FLOAT_WORD(i0,x); sx = (i0>>31)&1; jj0 = ((i0>>23)&0xff)-0x7f; if(jj0<23) { if(jj0<0) { if((i0&0x7fffffff)==0) return x; i1 = (i0&0x07fffff); i0 &= 0xfff00000; i0 |= ((i1|-i1)>>9)&0x400000; SET_FLOAT_WORD(x,i0); w = TWO23[sx]+x; t = w-TWO23[sx]; GET_FLOAT_WORD(i0,t); SET_FLOAT_WORD(t,(i0&0x7fffffff)|(sx<<31)); return t; } else { i = (0x007fffff)>>jj0; if((i0&i)==0) return x; /* x is integral */ i>>=1; if((i0&i)!=0) i0 = (i0&(~i))|((0x100000)>>jj0); } } else { if(jj0==0x80) return x+x; /* inf or NaN */ else return x; /* x is integral */ } SET_FLOAT_WORD(x,i0); w = TWO23[sx]+x; return w-TWO23[sx]; } e='author'>author
path: root/sys/arch/i386/include/byte_swap.h
AgeCommit message (Expand)Author
2020-08-10Clean up _LKM --> _MODULE leftovers.rin
2020-07-23Trailing whitespaceskrll
2008-04-28Remove clause 3 and 4 from TNF licensesmartin
2007-11-14- Remove I486_CPU, I586_CPU, I686_CPU options. They buy us nothing andad
2007-10-17Merge the ppcoea-renovation branch to HEAD.garbled
2007-09-26x86 changes for pcc and LKMs.ad
2007-01-24Remove duplicate #includes, patch contributed in private mailhubertf
2006-01-30Move all the stuff that detects bswapxx(constant) into the MI sys/bswap.hdsl
2005-12-28inline -> __inlineperry
2005-12-26u_intN_t -> uintN_tperry
2005-12-24Remove leading __ from __(const|inline|signed|volatile) -- it is obsolete.perry
2001-11-29minor knflukem
2001-11-03explicitly pull in sys/types.hlukem
2001-11-02replace __byte_swap_long_variable and __byte_swap_word_variablelukem
2001-05-30use _KERNEL_OPTmrg
2000-03-16This code has nothing to do with UCB.mycroft