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1999-07-29 Andreas Schwab <schwab@suse.de> * misc/efgcvt.c (NDIGIT_MAX): Provide precomputed constants for all floating point formats supported by gcc. Error out for unhandled precisions. * misc/efgcvt_r.c (NDIGIT_MAX): Likewise. * misc/qefgcvt.c (NDIGIT_MAX): Likewise. * misc/qefgcvt_r.c (NDIGIT_MAX): Likewise.
43 lines
1.5 KiB
C
43 lines
1.5 KiB
C
/* Compatibility functions for floating point formatting, reentrant,
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long double versions.
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Copyright (C) 1996, 1997, 1999 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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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 not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <float.h>
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#define FLOAT_TYPE long double
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#define FUNC_PREFIX q
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#define FLOAT_FMT_FLAG "L"
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#define FLOAT_NAME_EXT l
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#if LDBL_MANT_DIG == 64
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# define NDIGIT_MAX 21
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#elif LDBL_MANT_DIG == 53
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# define NDIGIT_MAX 17
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#elif LDBL_MANT_DIG == 113
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# define NDIGIT_MAX 36
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#elif LDBL_MANT_DIG == 56
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# define NDIGIT_MAX 18
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#else
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/* See IEEE 854 5.6, table 2 for this formula. Unfortunately we need a
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compile time constant here, so we cannot use it. */
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# error "NDIGIT_MAX must be precomputed"
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# define NDIGIT_MAX (lrint (ceil (M_LN2 / M_LN10 * LDBL_MANT_DIG + 1.0)))
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#endif
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#include "efgcvt_r.c"
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