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authorupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
committerupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
commit554fd8c5195424bdbcabf5de30fdc183aba391bd (patch)
tree976dc5ab7fddf506dadce60ae936f43f58787092 /libquadmath/printf/fpioconst.h
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Diffstat (limited to 'libquadmath/printf/fpioconst.h')
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diff --git a/libquadmath/printf/fpioconst.h b/libquadmath/printf/fpioconst.h
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+/* 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 */