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1999-12-29 Ulrich Drepper <drepper@cygnus.com> * soft-fp/*: Tons of new files to implement floating-point arithmetic in software. Contributed by Richard Henderson, Jakub Jelinek and others.
53 lines
1.6 KiB
C
53 lines
1.6 KiB
C
/* Software floating-point emulation.
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frexpl(x, exp)
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Copyright (C) 1999 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Jakub Jelinek (jj@ultra.linux.cz).
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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 Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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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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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc.,
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59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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/*
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* for non-zero x
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* x = frexpl(arg,&exp);
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* return a long double fp quantity x such that 0.5 <= |x| <1.0
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* and the corresponding binary exponent "exp". That is
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* arg = x*2^exp.
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* If arg is inf, 0.0, or NaN, then frexpl(arg,&exp) returns arg
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* with *exp=0.
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*/
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#include "soft-fp.h"
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#include "quad.h"
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long double __frexpl(long double arg, int *exp)
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{
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FP_DECL_EX;
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FP_DECL_Q(A);
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long double r;
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*exp = 0;
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FP_UNPACK_Q(A, arg);
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if (A_c != FP_CLS_NORMAL)
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return arg;
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*exp = A_e + 1;
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A_e = -1;
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FP_PACK_Q(r, A);
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return r;
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}
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weak_alias (__frexpl, frexpl)
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