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Diffstat (limited to 'libquadmath/printf/fpioconst.h')
-rw-r--r-- | libquadmath/printf/fpioconst.h | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/libquadmath/printf/fpioconst.h b/libquadmath/printf/fpioconst.h new file mode 100644 index 000000000..418755547 --- /dev/null +++ b/libquadmath/printf/fpioconst.h @@ -0,0 +1,64 @@ +/* Header file for constants used in floating point <-> decimal conversions. + Copyright (C) 1995, 1996, 1997, 1998, 1999, 2002, 2003 + Free Software Foundation, Inc. + This file is part of the GNU C Library. + + 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. */ + +#ifndef _FPIOCONST_H +#define _FPIOCONST_H + +#include <float.h> +#include <math.h> + + +/* These values are used by __printf_fp, where they are noncritical (if the + value is not large enough, it will just be slower); and by + strtof/strtod/strtold, where it is critical (it's used for overflow + detection). + + XXX These should be defined in <float.h>. For the time being, we have the + IEEE754 values here. */ + +#define FLT128_MAX_10_EXP_LOG 12 /* = floor(log_2(FLT128_MAX_10_EXP)) */ + + +/* The array with the number representation. */ +#define __tens __quadmath_tens +extern const mp_limb_t __tens[] attribute_hidden; + +/* Table of powers of ten. This is used by __printf_fp and by + strtof/strtod/strtold. */ +struct mp_power + { + size_t arrayoff; /* Offset in `__tens'. */ + mp_size_t arraysize; /* Size of the array. */ + int p_expo; /* Exponent of the number 10^(2^i). */ + int m_expo; /* Exponent of the number 10^-(2^i-1). */ + }; +#define _fpioconst_pow10 __quadmath_fpioconst_pow10 +extern const struct mp_power _fpioconst_pow10[FLT128_MAX_10_EXP_LOG + 1] + attribute_hidden; + +/* The constants in the array `_fpioconst_pow10' have an offset. */ +#if BITS_PER_MP_LIMB == 32 +# define _FPIO_CONST_OFFSET 2 +#else +# define _FPIO_CONST_OFFSET 1 +#endif + + +#endif /* fpioconst.h */ |