mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-25 04:01:10 +00:00
52 lines
1.5 KiB
C
52 lines
1.5 KiB
C
/* Software floating-point emulation.
|
|
frexpl(x, exp)
|
|
Copyright (C) 1999-2014 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by 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/>. */
|
|
|
|
/*
|
|
* for non-zero x
|
|
* x = frexpl(arg,&exp);
|
|
* return a long double fp quantity x such that 0.5 <= |x| <1.0
|
|
* and the corresponding binary exponent "exp". That is
|
|
* arg = x*2^exp.
|
|
* If arg is inf, 0.0, or NaN, then frexpl(arg,&exp) returns arg
|
|
* with *exp=0.
|
|
*/
|
|
|
|
#include "soft-fp.h"
|
|
#include "quad.h"
|
|
|
|
long double __frexpl(long double arg, int *exp)
|
|
{
|
|
FP_DECL_EX;
|
|
FP_DECL_Q(A);
|
|
long double r;
|
|
|
|
*exp = 0;
|
|
FP_UNPACK_Q(A, arg);
|
|
if (A_c != FP_CLS_NORMAL)
|
|
return arg;
|
|
*exp = A_e + 1;
|
|
A_e = -1;
|
|
FP_PACK_Q(r, A);
|
|
|
|
return r;
|
|
}
|
|
|
|
weak_alias (__frexpl, frexpl)
|