Prepare for radical source tree reorganization.zack/build-layout-experiment

All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).

1 files changed, 88 insertions, 0 deletions

diff --git a/REORG.TODO/stdlib/fpioconst.h b/REORG.TODO/stdlib/fpioconst.h
new file mode 100644
index 0000000000..c05f8e7bac
--- /dev/null
+++ b/REORG.TODO/stdlib/fpioconst.h
@@ -0,0 +1,88 @@
+/* Header file for constants used in floating point <-> decimal conversions.
+   Copyright (C) 1995-2017 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, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef _FPIOCONST_H
+#define	_FPIOCONST_H
+
+#include <float.h>
+#include <math.h>
+#include <gmp.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.  */
+
+#if !defined __NO_LONG_DOUBLE_MATH && __LDBL_MAX_EXP__ > 1024
+# define LDBL_MAX_10_EXP_LOG	12 /* = floor(log_2(LDBL_MAX_10_EXP)) */
+#else
+# define LDBL_MAX_10_EXP_LOG	8 /* = floor(log_2(LDBL_MAX_10_EXP)) */
+#endif
+#define DBL_MAX_10_EXP_LOG	8 /* = floor(log_2(DBL_MAX_10_EXP)) */
+#define FLT_MAX_10_EXP_LOG	5 /* = floor(log_2(FLT_MAX_10_EXP)) */
+
+/* On some machines, _Float128 may be ABI-distinct from long double (e.g
+   IBM extended precision).  */
+#include <bits/floatn.h>
+
+#if __HAVE_DISTINCT_FLOAT128
+# define FLT128_MAX_10_EXP_LOG	12 /* = floor(log_2(FLT128_MAX_10_EXP)) */
+#endif
+
+/* For strtold, we need powers of 10 up to floor (log_2 (LDBL_MANT_DIG
+   - LDBL_MIN_EXP + 2)).  When _Float128 is enabled in libm and it is
+   ABI-distinct from long double (e.g. on powerpc64le), we also need powers
+   of 10 up to floor (log_2 (FLT128_MANT_DIG - FLT128_MIN_EXP + 2)).  */
+#define FPIOCONST_HAVE_EXTENDED_RANGE \
+  ((!defined __NO_LONG_DOUBLE_MATH && __LDBL_MAX_EXP__ > 1024) \
+   || __HAVE_DISTINCT_FLOAT128)
+
+#if FPIOCONST_HAVE_EXTENDED_RANGE
+# define FPIOCONST_POW10_ARRAY_SIZE	15
+#else
+# define FPIOCONST_POW10_ARRAY_SIZE	11
+#endif
+
+/* The array with the number representation. */
+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).  */
+  };
+extern const struct mp_power _fpioconst_pow10[FPIOCONST_POW10_ARRAY_SIZE]
+     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 */