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/* Auxiliary definitions for <float.h>.
Copyright (C) 2011-2024 Free Software Foundation, Inc.
Written by Bruno Haible <bruno@clisp.org>, 2011.
This file 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.
This file 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 this program. If not, see <https://www.gnu.org/licenses/>. */
#include <config.h>
/* Specification. */
#include <float.h>
#if GNULIB_defined_long_double_union
# if (defined _ARCH_PPC || defined _POWER) && (defined _AIX || defined __linux__) && (LDBL_MANT_DIG == 106) && defined __GNUC__
const union gl_long_double_union gl_LDBL_MAX =
{ { DBL_MAX, DBL_MAX / (double)134217728UL / (double)134217728UL } };
# elif defined __i386__
const union gl_long_double_union gl_LDBL_MAX =
{ { 0xFFFFFFFF, 0xFFFFFFFF, 32766 } };
# endif
# if defined __i386__ && (defined __FreeBSD__ || defined __DragonFly__)
/* We can't even simply evaluate the formula (LDBL_MIN / 9223372036854775808.0L)
at run time, because it would require BEGIN_LONG_DOUBLE_ROUNDING /
END_LONG_DOUBLE_ROUNDING invocations. It simpler to just write down the
representation of LDBL_TRUE_MIN, based on
<https://en.wikipedia.org/wiki/Extended_precision#x86_extended_precision_format>. */
const union gl_long_double_union gl_LDBL_TRUE_MIN =
{ { 0x00000001, 0x00000000, 0 } };
# endif
#endif
#if GNULIB_defined_FLT_SNAN
/* Define like memory_positive_SNaNf(), see signed-snan.h and snan.h,
or like setpayloadsigf() with an arbitrary payload. */
gl_FLT_SNAN_t gl_FLT_SNAN =
# if FLT_MANT_DIG == 24
# if defined __hppa || (defined __mips__ && !MIPS_NAN2008_FLOAT) || defined __sh__
/* sign bit: 0, 8 exponent bits: all 1, next bit: 1, payload: 0b10...0 */
{ { 0x7FE00000U } }
# else
/* sign bit: 0, 8 exponent bits: all 1, next bit: 0, payload: 0b10...0 */
{ { 0x7FA00000U } }
# endif
# endif
;
#endif
#if GNULIB_defined_DBL_SNAN
/* Define like memory_positive_SNaNd(), see signed-snan.h and snan.h,
or like setpayloadsig() with an arbitrary payload. */
gl_DBL_SNAN_t gl_DBL_SNAN =
# if DBL_MANT_DIG == 53
# if defined __hppa || (defined __mips__ && !MIPS_NAN2008_FLOAT) || defined __sh__
/* sign bit: 0, 11 exponent bits: all 1, next bit: 1, payload: 0b10...0 */
{ { 0x7FFC000000000000ULL } }
# else
/* sign bit: 0, 11 exponent bits: all 1, next bit: 0, payload: 0b10...0 */
{ { 0x7FF4000000000000ULL } }
# endif
# endif
;
#endif
#if GNULIB_defined_LDBL_SNAN
# ifdef WORDS_BIGENDIAN
# define TWO(hi,lo) { hi, lo }
# else
# define TWO(hi,lo) { lo, hi }
# endif
/* Define like memory_positive_SNaNl(), see signed-snan.h and snan.h,
or like setpayloadsigl() with an arbitrary payload. */
gl_LDBL_SNAN_t gl_LDBL_SNAN =
# if LDBL_MANT_DIG == 53 /* on arm, hppa, mips, sh, but also MSVC */
# if defined __hppa || (defined __mips__ && !MIPS_NAN2008_FLOAT) || defined __sh__
/* sign bit: 0, 11 exponent bits: all 1, next bit: 1, payload: 0b10...0 */
{ { 0x7FFC000000000000ULL } }
# else
/* sign bit: 0, 11 exponent bits: all 1, next bit: 0, payload: 0b10...0 */
{ { 0x7FF4000000000000ULL } }
# endif
# elif LDBL_MANT_DIG == 64 /* on i386, x86_64, ia64, m68k */
# if defined __m68k__
/* sign bit: 0, 15 exponent bits: all 1, 16 gap bits: all 0,
always=1 bit: 1, next bit: 0, payload: 0b10...0 */
{ { 0x7FFF0000ULL, 0xA0000000ULL, 0x00000000ULL } }
# else
/* sign bit: 0, 15 exponent bits: all 1, always=1 bit: 1, next bit: 0, payload: 0b10...0
(see <https://en.wikipedia.org/wiki/Extended_precision#x86_extended_precision_format>) */
{ TWO (0x00007FFFULL, 0xA000000000000000ULL) }
# endif
# elif LDBL_MANT_DIG == 106 /* on powerpc, powerpc64, powerpc64le */
/* most-significant double:
sign bit: 0, 11 exponent bits: all 1, next bit: 0, payload: 0b10...0,
least-significant double: 0.0 */
{ { 0x7FF4000000000000ULL, 0ULL } }
# elif LDBL_MANT_DIG == 113 /* on alpha, arm64, loongarch64, mips64, riscv64, s390x, sparc64 */
# if (defined __mips__ && !MIPS_NAN2008_FLOAT)
/* sign bit: 0, 15 exponent bits: all 1, next bit: 1, payload: 0b10...0 */
{ TWO (0x7FFFC00000000000ULL, 0ULL) }
# else
/* sign bit: 0, 15 exponent bits: all 1, next bit: 0, payload: 0b10...0 */
{ TWO (0x7FFF400000000000ULL, 0ULL) }
# endif
# endif
;
#endif
/* This declaration is solely to ensure that after preprocessing
this file is never empty. */
typedef int dummy;
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