1eba086706
PR libquadmath/65757 * quadmath-imp.h (math_opt_barrier, math_force_eval, math_narrow_eval, math_check_force_underflow, math_check_force_underflow_nonneg): Define. * math/ceilq.c: Backport changes from upstream glibc between 2012-11-01 and 2017-07-13. * math/remquoq.c: Likewise. * math/expq.c: Likewise. * math/llroundq.c: Likewise. * math/logq.c: Likewise. * math/atanq.c: Likewise. * math/nearbyintq.c: Likewise. * math/scalblnq.c: Likewise. * math/finiteq.c: Likewise. * math/atanhq.c: Likewise. * math/expm1q.c: Likewise. * math/sinhq.c: Likewise. * math/log10q.c: Likewise. * math/rintq.c: Likewise. * math/roundq.c: Likewise. * math/fmaq.c: Likewise. * math/erfq.c: Likewise. * math/log2q.c: Likewise. * math/lroundq.c: Likewise. * math/j1q.c: Likewise. * math/scalbnq.c: Likewise. * math/truncq.c: Likewise. * math/frexpq.c: Likewise. * math/sincosq.c: Likewise. * math/tanhq.c: Likewise. * math/asinq.c: Likewise. * math/coshq.c: Likewise. * math/j0q.c: Likewise. * math/asinhq.c: Likewise. * math/floorq.c: Likewise. * math/sinq_kernel.c: Likewise. * math/powq.c: Likewise. * math/hypotq.c: Likewise. * math/sincos_table.c: Likewise. * math/rem_pio2q.c: Likewise. * math/nextafterq.c: Likewise. * math/log1pq.c: Likewise. * math/sincosq_kernel.c: Likewise. * math/tanq.c: Likewise. * math/acosq.c: Likewise. * math/lrintq.c: Likewise. * math/llrintq.c: Likewise. From-SVN: r250343
77 lines
1.9 KiB
C
77 lines
1.9 KiB
C
/* Round __float128 to integer away from zero.
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Copyright (C) 1997-2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997 and
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Jakub Jelinek <jj@ultra.linux.cz>, 1999.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include "quadmath-imp.h"
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__float128
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roundq (__float128 x)
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{
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int32_t j0;
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uint64_t i1, i0;
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GET_FLT128_WORDS64 (i0, i1, x);
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j0 = ((i0 >> 48) & 0x7fff) - 0x3fff;
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if (j0 < 48)
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{
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if (j0 < 0)
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{
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i0 &= 0x8000000000000000ULL;
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if (j0 == -1)
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i0 |= 0x3fff000000000000LL;
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i1 = 0;
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}
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else
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{
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uint64_t i = 0x0000ffffffffffffLL >> j0;
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if (((i0 & i) | i1) == 0)
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/* X is integral. */
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return x;
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i0 += 0x0000800000000000LL >> j0;
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i0 &= ~i;
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i1 = 0;
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}
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}
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else if (j0 > 111)
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{
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if (j0 == 0x4000)
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/* Inf or NaN. */
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return x + x;
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else
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return x;
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}
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else
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{
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uint64_t i = -1ULL >> (j0 - 48);
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if ((i1 & i) == 0)
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/* X is integral. */
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return x;
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uint64_t j = i1 + (1LL << (111 - j0));
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if (j < i1)
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i0 += 1;
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i1 = j;
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i1 &= ~i;
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}
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SET_FLT128_WORDS64 (x, i0, i1);
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return x;
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}
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