93f6e21759
* lib/Makefile.am, lib/alloca.c, lib/alloca.in.h, lib/argp-ba.c, lib/argp-eexst.c, lib/argp-fmtstream.c, lib/argp-fmtstream.h, lib/argp-fs-xinl.c, lib/argp-help.c, lib/argp-namefrob.h, lib/argp-parse.c, lib/argp-pin.c, lib/argp-pv.c, lib/argp-pvh.c, lib/argp-xinl.c, lib/argp.h, lib/asnprintf.c, lib/basename-lgpl.c, lib/dirname-lgpl.c, lib/dirname.h, lib/dosname.h, lib/errno.in.h, lib/float+.h, lib/float.c, lib/float.in.h, lib/getopt.c, lib/getopt.in.h, lib/getopt1.c, lib/getopt_int.h, lib/gettext.h, lib/intprops.h, lib/itold.c, lib/malloc.c, lib/memchr.c, lib/memchr.valgrind, lib/mempcpy.c, lib/printf-args.c, lib/printf-args.h, lib/printf-parse.c, lib/printf-parse.h, lib/rawmemchr.c, lib/rawmemchr.valgrind, lib/size_max.h, lib/sleep.c, lib/stdalign.in.h, lib/stdbool.in.h, lib/stddef.in.h, lib/stdint.in.h, lib/stdio.in.h, lib/stdlib.in.h, lib/strcasecmp.c, lib/strchrnul.c, lib/strchrnul.valgrind, lib/strerror-override.c, lib/strerror-override.h, lib/strerror.c, lib/string.in.h, lib/strings.in.h, lib/stripslash.c, lib/strncasecmp.c, lib/strndup.c, lib/strnlen.c, lib/sys_types.in.h, lib/sysexits.in.h, lib/unistd.in.h, lib/vasnprintf.c, lib/vasnprintf.h, lib/verify.h, lib/vsnprintf.c, lib/wchar.in.h, lib/xsize.h, m4/00gnulib.m4, m4/alloca.m4, m4/argp.m4, m4/dirname.m4, m4/double-slash-root.m4, m4/errno_h.m4, m4/exponentd.m4, m4/extensions.m4, m4/float_h.m4, m4/getopt.m4, m4/gnulib-cache.m4, m4/gnulib-common.m4, m4/gnulib-comp.m4, m4/gnulib-tool.m4, m4/include_next.m4, m4/intmax_t.m4, m4/inttypes_h.m4, m4/longlong.m4, m4/malloc.m4, m4/math_h.m4, m4/memchr.m4, m4/mempcpy.m4, m4/mmap-anon.m4, m4/multiarch.m4, m4/nocrash.m4, m4/off_t.m4, m4/printf.m4, m4/rawmemchr.m4, m4/size_max.m4, m4/sleep.m4, m4/ssize_t.m4, m4/stdalign.m4, m4/stdbool.m4, m4/stddef_h.m4, m4/stdint.m4, m4/stdint_h.m4, m4/stdio_h.m4, m4/stdlib_h.m4, m4/strcase.m4, m4/strchrnul.m4, m4/strerror.m4, m4/string_h.m4, m4/strings_h.m4, m4/strndup.m4, m4/strnlen.m4, m4/sys_socket_h.m4, m4/sys_types_h.m4, m4/sysexits.m4, m4/unistd_h.m4, m4/vasnprintf.m4, m4/vsnprintf.m4, m4/warn-on-use.m4, m4/wchar_h.m4, m4/wchar_t.m4, m4/wint_t.m4, m4/xsize.m4, tools/snippet/_Noreturn.h, tools/snippet/arg-nonnull.h, tools/snippet/c++defs.h, tools/snippet/warn-on-use.h: New files from gnulib 1af55d85d9762a679b4302d5995f05ccd883e956. * configure.ac, Makefile.am: Adjust to compile gnulib. * src/bin/Makefile.am: Adjust to use gnulib. * README: Mention lib/.
147 lines
5.5 KiB
C
147 lines
5.5 KiB
C
/* Supplemental information about the floating-point formats.
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Copyright (C) 2007, 2009-2012 Free Software Foundation, Inc.
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Written by Bruno Haible <bruno@clisp.org>, 2007.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, see <http://www.gnu.org/licenses/>. */
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#ifndef _FLOATPLUS_H
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#define _FLOATPLUS_H
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#include <float.h>
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#include <limits.h>
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/* Number of bits in the mantissa of a floating-point number, including the
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"hidden bit". */
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#if FLT_RADIX == 2
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# define FLT_MANT_BIT FLT_MANT_DIG
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# define DBL_MANT_BIT DBL_MANT_DIG
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# define LDBL_MANT_BIT LDBL_MANT_DIG
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#elif FLT_RADIX == 4
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# define FLT_MANT_BIT (FLT_MANT_DIG * 2)
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# define DBL_MANT_BIT (DBL_MANT_DIG * 2)
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# define LDBL_MANT_BIT (LDBL_MANT_DIG * 2)
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#elif FLT_RADIX == 16
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# define FLT_MANT_BIT (FLT_MANT_DIG * 4)
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# define DBL_MANT_BIT (DBL_MANT_DIG * 4)
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# define LDBL_MANT_BIT (LDBL_MANT_DIG * 4)
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#endif
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/* Bit mask that can be used to mask the exponent, as an unsigned number. */
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#define FLT_EXP_MASK ((FLT_MAX_EXP - FLT_MIN_EXP) | 7)
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#define DBL_EXP_MASK ((DBL_MAX_EXP - DBL_MIN_EXP) | 7)
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#define LDBL_EXP_MASK ((LDBL_MAX_EXP - LDBL_MIN_EXP) | 7)
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/* Number of bits used for the exponent of a floating-point number, including
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the exponent's sign. */
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#define FLT_EXP_BIT \
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(FLT_EXP_MASK < 0x100 ? 8 : \
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FLT_EXP_MASK < 0x200 ? 9 : \
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FLT_EXP_MASK < 0x400 ? 10 : \
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FLT_EXP_MASK < 0x800 ? 11 : \
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FLT_EXP_MASK < 0x1000 ? 12 : \
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FLT_EXP_MASK < 0x2000 ? 13 : \
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FLT_EXP_MASK < 0x4000 ? 14 : \
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FLT_EXP_MASK < 0x8000 ? 15 : \
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FLT_EXP_MASK < 0x10000 ? 16 : \
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FLT_EXP_MASK < 0x20000 ? 17 : \
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FLT_EXP_MASK < 0x40000 ? 18 : \
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FLT_EXP_MASK < 0x80000 ? 19 : \
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FLT_EXP_MASK < 0x100000 ? 20 : \
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FLT_EXP_MASK < 0x200000 ? 21 : \
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FLT_EXP_MASK < 0x400000 ? 22 : \
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FLT_EXP_MASK < 0x800000 ? 23 : \
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FLT_EXP_MASK < 0x1000000 ? 24 : \
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FLT_EXP_MASK < 0x2000000 ? 25 : \
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FLT_EXP_MASK < 0x4000000 ? 26 : \
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FLT_EXP_MASK < 0x8000000 ? 27 : \
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FLT_EXP_MASK < 0x10000000 ? 28 : \
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FLT_EXP_MASK < 0x20000000 ? 29 : \
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FLT_EXP_MASK < 0x40000000 ? 30 : \
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FLT_EXP_MASK <= 0x7fffffff ? 31 : \
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32)
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#define DBL_EXP_BIT \
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(DBL_EXP_MASK < 0x100 ? 8 : \
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DBL_EXP_MASK < 0x200 ? 9 : \
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DBL_EXP_MASK < 0x400 ? 10 : \
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DBL_EXP_MASK < 0x800 ? 11 : \
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DBL_EXP_MASK < 0x1000 ? 12 : \
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DBL_EXP_MASK < 0x2000 ? 13 : \
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DBL_EXP_MASK < 0x4000 ? 14 : \
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DBL_EXP_MASK < 0x8000 ? 15 : \
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DBL_EXP_MASK < 0x10000 ? 16 : \
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DBL_EXP_MASK < 0x20000 ? 17 : \
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DBL_EXP_MASK < 0x40000 ? 18 : \
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DBL_EXP_MASK < 0x80000 ? 19 : \
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DBL_EXP_MASK < 0x100000 ? 20 : \
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DBL_EXP_MASK < 0x200000 ? 21 : \
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DBL_EXP_MASK < 0x400000 ? 22 : \
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DBL_EXP_MASK < 0x800000 ? 23 : \
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DBL_EXP_MASK < 0x1000000 ? 24 : \
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DBL_EXP_MASK < 0x2000000 ? 25 : \
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DBL_EXP_MASK < 0x4000000 ? 26 : \
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DBL_EXP_MASK < 0x8000000 ? 27 : \
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DBL_EXP_MASK < 0x10000000 ? 28 : \
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DBL_EXP_MASK < 0x20000000 ? 29 : \
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DBL_EXP_MASK < 0x40000000 ? 30 : \
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DBL_EXP_MASK <= 0x7fffffff ? 31 : \
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32)
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#define LDBL_EXP_BIT \
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(LDBL_EXP_MASK < 0x100 ? 8 : \
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LDBL_EXP_MASK < 0x200 ? 9 : \
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LDBL_EXP_MASK < 0x400 ? 10 : \
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LDBL_EXP_MASK < 0x800 ? 11 : \
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LDBL_EXP_MASK < 0x1000 ? 12 : \
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LDBL_EXP_MASK < 0x2000 ? 13 : \
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LDBL_EXP_MASK < 0x4000 ? 14 : \
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LDBL_EXP_MASK < 0x8000 ? 15 : \
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LDBL_EXP_MASK < 0x10000 ? 16 : \
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LDBL_EXP_MASK < 0x20000 ? 17 : \
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LDBL_EXP_MASK < 0x40000 ? 18 : \
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LDBL_EXP_MASK < 0x80000 ? 19 : \
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LDBL_EXP_MASK < 0x100000 ? 20 : \
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LDBL_EXP_MASK < 0x200000 ? 21 : \
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LDBL_EXP_MASK < 0x400000 ? 22 : \
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LDBL_EXP_MASK < 0x800000 ? 23 : \
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LDBL_EXP_MASK < 0x1000000 ? 24 : \
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LDBL_EXP_MASK < 0x2000000 ? 25 : \
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LDBL_EXP_MASK < 0x4000000 ? 26 : \
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LDBL_EXP_MASK < 0x8000000 ? 27 : \
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LDBL_EXP_MASK < 0x10000000 ? 28 : \
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LDBL_EXP_MASK < 0x20000000 ? 29 : \
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LDBL_EXP_MASK < 0x40000000 ? 30 : \
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LDBL_EXP_MASK <= 0x7fffffff ? 31 : \
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32)
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/* Number of bits used for a floating-point number: the mantissa (not
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counting the "hidden bit", since it may or may not be explicit), the
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exponent, and the sign. */
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#define FLT_TOTAL_BIT ((FLT_MANT_BIT - 1) + FLT_EXP_BIT + 1)
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#define DBL_TOTAL_BIT ((DBL_MANT_BIT - 1) + DBL_EXP_BIT + 1)
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#define LDBL_TOTAL_BIT ((LDBL_MANT_BIT - 1) + LDBL_EXP_BIT + 1)
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/* Number of bytes used for a floating-point number.
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This can be smaller than the 'sizeof'. For example, on i386 systems,
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'long double' most often have LDBL_MANT_BIT = 64, LDBL_EXP_BIT = 16, hence
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LDBL_TOTAL_BIT = 80 bits, i.e. 10 bytes of consecutive memory, but
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sizeof (long double) = 12 or = 16. */
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#define SIZEOF_FLT ((FLT_TOTAL_BIT + CHAR_BIT - 1) / CHAR_BIT)
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#define SIZEOF_DBL ((DBL_TOTAL_BIT + CHAR_BIT - 1) / CHAR_BIT)
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#define SIZEOF_LDBL ((LDBL_TOTAL_BIT + CHAR_BIT - 1) / CHAR_BIT)
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/* Verify that SIZEOF_FLT <= sizeof (float) etc. */
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typedef int verify_sizeof_flt[SIZEOF_FLT <= sizeof (float) ? 1 : -1];
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typedef int verify_sizeof_dbl[SIZEOF_DBL <= sizeof (double) ? 1 : - 1];
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typedef int verify_sizeof_ldbl[SIZEOF_LDBL <= sizeof (long double) ? 1 : - 1];
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#endif /* _FLOATPLUS_H */
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