diff options
Diffstat (limited to 'lib/float.in.h')
| -rw-r--r-- | lib/float.in.h | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/lib/float.in.h b/lib/float.in.h index 73e8d406..5e78b4f2 100644 --- a/lib/float.in.h +++ b/lib/float.in.h @@ -28,6 +28,8 @@ #ifndef _@GUARD_PREFIX@_FLOAT_H #define _@GUARD_PREFIX@_FLOAT_H +/* ============================ ISO C99 support ============================ */ + /* 'long double' properties. */ #if defined __i386__ && (defined __BEOS__ || defined __OpenBSD__) @@ -179,6 +181,156 @@ extern const union gl_long_double_union gl_LDBL_MAX; # endif #endif +/* ============================ ISO C11 support ============================ */ + +/* 'float' properties */ + +#ifndef FLT_HAS_SUBNORM +# define FLT_HAS_SUBNORM 1 +#endif +#ifndef FLT_DECIMAL_DIG +/* FLT_MANT_DIG = 24 => FLT_DECIMAL_DIG = 9 */ +# define FLT_DECIMAL_DIG ((int)(FLT_MANT_DIG * 0.3010299956639812 + 2)) +#endif +#if defined _AIX && !defined __GNUC__ +/* On AIX, the value of FLT_TRUE_MIN in /usr/include/float.h is a 'double', + not a 'float'. */ +# undef FLT_TRUE_MIN +#endif +#ifndef FLT_TRUE_MIN +/* FLT_MIN / 2^(FLT_MANT_DIG-1) */ +# define FLT_TRUE_MIN (FLT_MIN / 8388608.0f) +#endif + +/* 'double' properties */ + +#ifndef DBL_HAS_SUBNORM +# define DBL_HAS_SUBNORM 1 +#endif +#ifndef DBL_DECIMAL_DIG +/* DBL_MANT_DIG = 53 => DBL_DECIMAL_DIG = 17 */ +# define DBL_DECIMAL_DIG ((int)(DBL_MANT_DIG * 0.3010299956639812 + 2)) +#endif +#ifndef DBL_TRUE_MIN +/* DBL_MIN / 2^(DBL_MANT_DIG-1) */ +# define DBL_TRUE_MIN (DBL_MIN / 4503599627370496.0) +#endif + +/* 'long double' properties */ + +#ifndef LDBL_HAS_SUBNORM +# define LDBL_HAS_SUBNORM 1 +#endif +#ifndef LDBL_DECIMAL_DIG +/* LDBL_MANT_DIG = 53 => LDBL_DECIMAL_DIG = 17 */ +/* LDBL_MANT_DIG = 64 => LDBL_DECIMAL_DIG = 21 */ +/* LDBL_MANT_DIG = 106 => LDBL_DECIMAL_DIG = 33 */ +/* LDBL_MANT_DIG = 113 => LDBL_DECIMAL_DIG = 36 */ +# define LDBL_DECIMAL_DIG ((int)(LDBL_MANT_DIG * 0.3010299956639812 + 2)) +#endif +#ifndef LDBL_TRUE_MIN +/* LDBL_MIN / 2^(LDBL_MANT_DIG-1) */ +# if LDBL_MANT_DIG == 53 +# define LDBL_TRUE_MIN (LDBL_MIN / 4503599627370496.0L) +# elif LDBL_MANT_DIG == 64 +# if defined __i386__ && (defined __FreeBSD__ || defined __DragonFly__) +/* Work around FreeBSD/x86 problem mentioned above. */ +extern const union gl_long_double_union gl_LDBL_TRUE_MIN; +# define LDBL_TRUE_MIN (gl_LDBL_TRUE_MIN.ld) +# else +# define LDBL_TRUE_MIN (LDBL_MIN / 9223372036854775808.0L) +# endif +# elif LDBL_MANT_DIG == 106 +# define LDBL_TRUE_MIN (LDBL_MIN / 40564819207303340847894502572032.0L) +# elif LDBL_MANT_DIG == 113 +# define LDBL_TRUE_MIN (LDBL_MIN / 5192296858534827628530496329220096.0L) +# endif +#endif + +/* ============================ ISO C23 support ============================ */ + +/* 'float' properties */ + +#ifndef FLT_IS_IEC_60559 +# if defined __m68k__ +# define FLT_IS_IEC_60559 0 +# else +# define FLT_IS_IEC_60559 1 +# endif +#endif +#ifndef FLT_NORM_MAX +# define FLT_NORM_MAX FLT_MAX +#endif +#ifndef FLT_SNAN +/* For sh, beware of <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111814>. */ +# if ((__GNUC__ + (__GNUC_MINOR__ >= 3) > 3) || defined __clang__) && !defined __sh__ +# define FLT_SNAN __builtin_nansf ("") +# else +typedef union { unsigned int word[1]; float value; } gl_FLT_SNAN_t; +extern gl_FLT_SNAN_t gl_FLT_SNAN; +# define FLT_SNAN (gl_FLT_SNAN.value) +# define GNULIB_defined_FLT_SNAN 1 +# endif +#endif + +/* 'double' properties */ + +#ifndef DBL_IS_IEC_60559 +# if defined __m68k__ +# define DBL_IS_IEC_60559 0 +# else +# define DBL_IS_IEC_60559 1 +# endif +#endif +#ifndef DBL_NORM_MAX +# define DBL_NORM_MAX DBL_MAX +#endif +#ifndef DBL_SNAN +/* For sh, beware of <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111814>. */ +# if ((__GNUC__ + (__GNUC_MINOR__ >= 3) > 3) || defined __clang__) && !defined __sh__ +# define DBL_SNAN __builtin_nans ("") +# else +typedef union { unsigned long long word[1]; double value; } gl_DBL_SNAN_t; +extern gl_DBL_SNAN_t gl_DBL_SNAN; +# define DBL_SNAN (gl_DBL_SNAN.value) +# define GNULIB_defined_DBL_SNAN 1 +# endif +#endif + +/* 'long double' properties */ + +#ifndef LDBL_IS_IEC_60559 +# if defined __m68k__ +# define LDBL_IS_IEC_60559 0 +# elif LDBL_MANT_DIG == 53 || LDBL_MANT_DIG == 113 +# define LDBL_IS_IEC_60559 1 +# else +# define LDBL_IS_IEC_60559 0 +# endif +#endif +#ifndef LDBL_NORM_MAX +# define LDBL_NORM_MAX LDBL_MAX +#endif +#ifndef LDBL_SNAN +/* For sh, beware of <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111814>. */ +# if ((__GNUC__ + (__GNUC_MINOR__ >= 3) > 3) || defined __clang__) && !defined __sh__ +# define LDBL_SNAN __builtin_nansl ("") +# else +# if LDBL_MANT_DIG == 53 +typedef union { unsigned long long word[1]; long double value; } gl_LDBL_SNAN_t; +# elif defined __m68k__ +typedef union { unsigned int word[3]; long double value; } gl_LDBL_SNAN_t; +# else +typedef union { unsigned long long word[2]; long double value; } gl_LDBL_SNAN_t; +# endif +extern gl_LDBL_SNAN_t gl_LDBL_SNAN; +# define LDBL_SNAN (gl_LDBL_SNAN.value) +# define GNULIB_defined_LDBL_SNAN 1 +# endif +#endif + +/* ================================= Other ================================= */ + #if @REPLACE_ITOLD@ /* Pull in a function that fixes the 'int' to 'long double' conversion of glibc 2.7. */ |