mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-02 01:40:07 +00:00
52 lines
1.6 KiB
C
52 lines
1.6 KiB
C
/* Software floating-point emulation: convert to fortran nearest.
|
|
Copyright (C) 1997,1999,2004,2006 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Richard Henderson (rth@cygnus.com) and
|
|
Jakub Jelinek (jj@ultra.linux.cz).
|
|
|
|
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, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include "local-soft-fp.h"
|
|
|
|
long
|
|
_OtsNintXQ (long al, long ah, long _round)
|
|
{
|
|
FP_DECL_EX;
|
|
FP_DECL_Q(A); FP_DECL_Q(B); FP_DECL_Q(C);
|
|
unsigned long r;
|
|
long s;
|
|
|
|
/* If bit 3 is set, then integer overflow detection is requested. */
|
|
s = _round & 8 ? 1 : -1;
|
|
_round = _round & 3;
|
|
|
|
FP_INIT_ROUNDMODE;
|
|
FP_UNPACK_SEMIRAW_Q(A, a);
|
|
|
|
/* Build 0.5 * sign(A) */
|
|
B_e = _FP_EXPBIAS_Q;
|
|
__FP_FRAC_SET_2 (B, 0, 0);
|
|
B_s = A_s;
|
|
|
|
FP_ADD_Q(C, A, B);
|
|
_FP_FRAC_SRL_2(C, _FP_WORKBITS);
|
|
_FP_FRAC_HIGH_RAW_Q(C) &= ~(_FP_W_TYPE)_FP_IMPLBIT_Q;
|
|
FP_TO_INT_Q(r, C, 64, s);
|
|
if (s > 0 && (_fex &= FP_EX_INVALID))
|
|
FP_HANDLE_EXCEPTIONS;
|
|
|
|
return r;
|
|
}
|