From 1bc5aee63eb72b341f506ad058502cd0361f0d10 Mon Sep 17 00:00:00 2001 From: Ben Cheng Date: Tue, 25 Mar 2014 22:37:19 -0700 Subject: Initial checkin of GCC 4.9.0 from trunk (r208799). Change-Id: I48a3c08bb98542aa215912a75f03c0890e497dba --- gcc-4.9/libquadmath/math/llrintq.c | 71 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 71 insertions(+) create mode 100644 gcc-4.9/libquadmath/math/llrintq.c (limited to 'gcc-4.9/libquadmath/math/llrintq.c') diff --git a/gcc-4.9/libquadmath/math/llrintq.c b/gcc-4.9/libquadmath/math/llrintq.c new file mode 100644 index 000000000..eef31d823 --- /dev/null +++ b/gcc-4.9/libquadmath/math/llrintq.c @@ -0,0 +1,71 @@ +/* Round argument to nearest integral value according to current rounding + direction. + Copyright (C) 1997, 1999, 2006 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper , 1997 and + Jakub Jelinek , 1999. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include "quadmath-imp.h" + +static const __float128 two112[2] = +{ + 5.19229685853482762853049632922009600E+33Q, /* 0x406F000000000000, 0 */ + -5.19229685853482762853049632922009600E+33Q /* 0xC06F000000000000, 0 */ +}; + +long long int +llrintq (__float128 x) +{ + int32_t j0; + uint64_t i0,i1; + volatile __float128 w; + __float128 t; + long long int result; + int sx; + + GET_FLT128_WORDS64 (i0, i1, x); + j0 = ((i0 >> 48) & 0x7fff) - 0x3fff; + sx = i0 >> 63; + i0 &= 0x0000ffffffffffffLL; + i0 |= 0x0001000000000000LL; + + if (j0 < (int32_t) (8 * sizeof (long long int)) - 1) + { + w = two112[sx] + x; + t = w - two112[sx]; + GET_FLT128_WORDS64 (i0, i1, t); + j0 = ((i0 >> 48) & 0x7fff) - 0x3fff; + i0 &= 0x0000ffffffffffffLL; + i0 |= 0x0001000000000000LL; + + if (j0 < 0) + result = 0; + else if (j0 <= 48) + result = i0 >> (48 - j0); + else + result = ((long long int) i0 << (j0 - 48)) | (i1 >> (112 - j0)); + } + else + { + /* The number is too large. It is left implementation defined + what happens. */ + return (long long int) x; + } + + return sx ? -result : result; +} -- cgit v1.2.3