From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- libquadmath/math/rintq.c | 66 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 66 insertions(+) create mode 100644 libquadmath/math/rintq.c (limited to 'libquadmath/math/rintq.c') diff --git a/libquadmath/math/rintq.c b/libquadmath/math/rintq.c new file mode 100644 index 000000000..fe7a59188 --- /dev/null +++ b/libquadmath/math/rintq.c @@ -0,0 +1,66 @@ +/* s_rintl.c -- long double version of s_rint.c. + * Conversion to IEEE quad long double by Jakub Jelinek, jj@ultra.linux.cz. + */ + +/* + * ==================================================== + * 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 "quadmath-imp.h" + +static const __float128 +TWO112[2]={ + 5.19229685853482762853049632922009600E+33L, /* 0x406F000000000000, 0 */ + -5.19229685853482762853049632922009600E+33L /* 0xC06F000000000000, 0 */ +}; + +__float128 +rintq (__float128 x) +{ + int64_t i0,j0,sx; + uint64_t i,i1; + __float128 w,t; + GET_FLT128_WORDS64(i0,i1,x); + sx = (((uint64_t)i0)>>63); + j0 = ((i0>>48)&0x7fff)-0x3fff; + if(j0<48) { + if(j0<0) { + if(((i0&0x7fffffffffffffffLL)|i1)==0) return x; + i1 |= (i0&0x0000ffffffffffffLL); + i0 &= 0xffffe00000000000ULL; + i0 |= ((i1|-i1)>>16)&0x0000800000000000LL; + SET_FLT128_MSW64(x,i0); + w = TWO112[sx]+x; + t = w-TWO112[sx]; + GET_FLT128_MSW64(i0,t); + SET_FLT128_MSW64(t,(i0&0x7fffffffffffffffLL)|(sx<<63)); + return t; + } else { + i = (0x0000ffffffffffffLL)>>j0; + if(((i0&i)|i1)==0) return x; /* x is integral */ + i>>=1; + if(((i0&i)|i1)!=0) { + if(j0==47) i1 = 0x4000000000000000ULL; else + i0 = (i0&(~i))|((0x0000200000000000LL)>>j0); + } + } + } else if (j0>111) { + if(j0==0x4000) return x+x; /* inf or NaN */ + else return x; /* x is integral */ + } else { + i = -1ULL>>(j0-48); + if((i1&i)==0) return x; /* x is integral */ + i>>=1; + if((i1&i)!=0) i1 = (i1&(~i))|((0x4000000000000000LL)>>(j0-48)); + } + SET_FLT128_WORDS64(x,i0,i1); + w = TWO112[sx]+x; + return w-TWO112[sx]; +} -- cgit v1.2.3