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
105 lines
3.0 KiB
C
105 lines
3.0 KiB
C
/* Round argument to nearest integral value according to current rounding
|
|
direction.
|
|
Copyright (C) 1997-2017 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997 and
|
|
Jakub Jelinek <jj@ultra.linux.cz>, 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;
|
|
__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)
|
|
{
|
|
#if defined FE_INVALID || defined FE_INEXACT
|
|
/* X < LLONG_MAX + 1 implied by J0 < 63. */
|
|
if (x > (__float128) LLONG_MAX)
|
|
{
|
|
/* In the event of overflow we must raise the "invalid"
|
|
exception, but not "inexact". */
|
|
t = nearbyintq (x);
|
|
#ifdef USE_FENV_H
|
|
feraiseexcept (t == LLONG_MAX ? FE_INEXACT : FE_INVALID);
|
|
#endif
|
|
}
|
|
else
|
|
#endif
|
|
{
|
|
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. Unless it rounds to LLONG_MIN,
|
|
FE_INVALID must be raised and the return value is
|
|
unspecified. */
|
|
#if defined FE_INVALID || defined FE_INEXACT
|
|
if (x < (__float128) LLONG_MIN
|
|
&& x > (__float128) LLONG_MIN - 1.0Q)
|
|
{
|
|
/* If truncation produces LLONG_MIN, the cast will not raise
|
|
the exception, but may raise "inexact". */
|
|
t = nearbyintq (x);
|
|
#ifdef USE_FENV_H
|
|
feraiseexcept (t == LLONG_MIN ? FE_INEXACT : FE_INVALID);
|
|
#endif
|
|
return LLONG_MIN;
|
|
}
|
|
|
|
#endif
|
|
|
|
/* The number is too large. It is left implementation defined
|
|
what happens. */
|
|
return (long long int) x;
|
|
}
|
|
|
|
return sx ? -result : result;
|
|
}
|