525 lines
11 KiB
C
525 lines
11 KiB
C
#ifndef __IEEE_BIG_ENDIAN
|
|
#ifndef __IEEE_LITTLE_ENDIAN
|
|
|
|
/* This file can define macros to choose variations of the IEEE float
|
|
format:
|
|
|
|
_FLT_LARGEST_EXPONENT_IS_NORMAL
|
|
|
|
Defined if the float format uses the largest exponent for finite
|
|
numbers rather than NaN and infinity representations. Such a
|
|
format cannot represent NaNs or infinities at all, but it's FLT_MAX
|
|
is twice the IEEE value.
|
|
|
|
_FLT_NO_DENORMALS
|
|
|
|
Defined if the float format does not support IEEE denormals. Every
|
|
float with a zero exponent is taken to be a zero representation.
|
|
|
|
??? At the moment, there are no equivalent macros above for doubles and
|
|
the macros are not fully supported by --enable-newlib-hw-fp.
|
|
|
|
__IEEE_BIG_ENDIAN
|
|
|
|
Defined if the float format is big endian. This is mutually exclusive
|
|
with __IEEE_LITTLE_ENDIAN.
|
|
|
|
__IEEE_LITTLE_ENDIAN
|
|
|
|
Defined if the float format is little endian. This is mutually exclusive
|
|
with __IEEE_BIG_ENDIAN.
|
|
|
|
Note that one of __IEEE_BIG_ENDIAN or __IEEE_LITTLE_ENDIAN must be specified for a
|
|
platform or error will occur.
|
|
|
|
__IEEE_BYTES_LITTLE_ENDIAN
|
|
|
|
This flag is used in conjunction with __IEEE_BIG_ENDIAN to describe a situation
|
|
whereby multiple words of an IEEE floating point are in big endian order, but the
|
|
words themselves are little endian with respect to the bytes.
|
|
|
|
_DOUBLE_IS_32BITS
|
|
|
|
This is used on platforms that support double by using the 32-bit IEEE
|
|
float type.
|
|
|
|
_FLOAT_ARG
|
|
|
|
This represents what type a float arg is passed as. It is used when the type is
|
|
not promoted to double.
|
|
|
|
|
|
__OBSOLETE_MATH_DEFAULT
|
|
|
|
Default value for __OBSOLETE_MATH if that's not set by the user.
|
|
It should be set here based on predefined feature macros.
|
|
|
|
__OBSOLETE_MATH
|
|
|
|
If set to 1 then some new math code will be disabled and older libm
|
|
code will be used instead. This is necessary because the new math
|
|
code does not support all targets, it assumes that the toolchain has
|
|
ISO C99 support (hexfloat literals, standard fenv semantics), the
|
|
target has IEEE-754 conforming binary32 float and binary64 double
|
|
(not mixed endian) representation, standard SNaN representation,
|
|
double and single precision arithmetics has similar latency and it
|
|
has no legacy SVID matherr support, only POSIX errno and fenv
|
|
exception based error handling.
|
|
*/
|
|
|
|
#if (defined(__arm__) || defined(__thumb__)) && !defined(__MAVERICK__)
|
|
/* ARM traditionally used big-endian words; and within those words the
|
|
byte ordering was big or little endian depending upon the target.
|
|
Modern floating-point formats are naturally ordered; in this case
|
|
__VFP_FP__ will be defined, even if soft-float. */
|
|
#ifdef __VFP_FP__
|
|
# ifdef __ARMEL__
|
|
# define __IEEE_LITTLE_ENDIAN
|
|
# else
|
|
# define __IEEE_BIG_ENDIAN
|
|
# endif
|
|
# if __ARM_FP & 0x8
|
|
# define __OBSOLETE_MATH_DEFAULT 0
|
|
# endif
|
|
#else
|
|
# define __IEEE_BIG_ENDIAN
|
|
# ifdef __ARMEL__
|
|
# define __IEEE_BYTES_LITTLE_ENDIAN
|
|
# endif
|
|
#endif
|
|
#ifndef __SOFTFP__
|
|
# define _SUPPORTS_ERREXCEPT
|
|
#endif
|
|
/* As per ISO/IEC TS 18661 '__FLT_EVAL_METHOD__' will be defined to 16
|
|
(if compiling with +fp16 support) so it can't be used by math.h to
|
|
define float_t and double_t. For values of '__FLT_EVAL_METHOD__'
|
|
other than 0, 1, 2 the definition of float_t and double_t is
|
|
implementation-defined. */
|
|
#define __DOUBLE_TYPE double
|
|
#define __FLOAT_TYPE float
|
|
#endif
|
|
|
|
#if defined (__aarch64__)
|
|
#if defined (__AARCH64EL__)
|
|
#define __IEEE_LITTLE_ENDIAN
|
|
#else
|
|
#define __IEEE_BIG_ENDIAN
|
|
#endif
|
|
#define __OBSOLETE_MATH_DEFAULT 0
|
|
#ifdef __ARM_FP
|
|
# define _SUPPORTS_ERREXCEPT
|
|
#endif
|
|
/* As per ISO/IEC TS 18661 '__FLT_EVAL_METHOD__' will be defined to 16
|
|
(if compiling with +fp16 support) so it can't be used by math.h to
|
|
define float_t and double_t. For values of '__FLT_EVAL_METHOD__'
|
|
other than 0, 1, 2 the definition of float_t and double_t is
|
|
implementation-defined. */
|
|
#define __DOUBLE_TYPE double
|
|
#define __FLOAT_TYPE float
|
|
#endif
|
|
|
|
#ifdef __epiphany__
|
|
#define __IEEE_LITTLE_ENDIAN
|
|
#define Sudden_Underflow 1
|
|
#endif
|
|
|
|
#ifdef __hppa__
|
|
#define __IEEE_BIG_ENDIAN
|
|
#endif
|
|
|
|
#ifdef __nds32__
|
|
#ifdef __big_endian__
|
|
#define __IEEE_BIG_ENDIAN
|
|
#else
|
|
#define __IEEE_LITTLE_ENDIAN
|
|
#endif
|
|
#endif
|
|
|
|
#ifdef __SPU__
|
|
#define __IEEE_BIG_ENDIAN
|
|
|
|
#define isfinite(__y) \
|
|
(__extension__ ({int __cy; \
|
|
(sizeof (__y) == sizeof (float)) ? (1) : \
|
|
(__cy = fpclassify(__y)) != FP_INFINITE && __cy != FP_NAN;}))
|
|
|
|
#define isinf(__x) ((sizeof (__x) == sizeof (float)) ? (0) : __isinfd(__x))
|
|
#define isnan(__x) ((sizeof (__x) == sizeof (float)) ? (0) : __isnand(__x))
|
|
|
|
/*
|
|
* Macros for use in ieeefp.h. We can't just define the real ones here
|
|
* (like those above) as we have name space issues when this is *not*
|
|
* included via generic the ieeefp.h.
|
|
*/
|
|
#define __ieeefp_isnanf(x) 0
|
|
#define __ieeefp_isinff(x) 0
|
|
#define __ieeefp_finitef(x) 1
|
|
#endif
|
|
|
|
#ifdef __sparc__
|
|
#ifdef __LITTLE_ENDIAN_DATA__
|
|
#define __IEEE_LITTLE_ENDIAN
|
|
#else
|
|
#define __IEEE_BIG_ENDIAN
|
|
#endif
|
|
#endif
|
|
|
|
#if defined(__m68k__) || defined(__mc68000__)
|
|
#define __IEEE_BIG_ENDIAN
|
|
#endif
|
|
|
|
#if defined(__mc68hc11__) || defined(__mc68hc12__) || defined(__mc68hc1x__)
|
|
#define __IEEE_BIG_ENDIAN
|
|
#ifdef __HAVE_SHORT_DOUBLE__
|
|
# define _DOUBLE_IS_32BITS
|
|
#endif
|
|
#endif
|
|
|
|
#if defined (__H8300__) || defined (__H8300H__) || defined (__H8300S__) || defined (__H8500__) || defined (__H8300SX__)
|
|
#define __IEEE_BIG_ENDIAN
|
|
#define _FLOAT_ARG float
|
|
#define _DOUBLE_IS_32BITS
|
|
#endif
|
|
|
|
#if defined (__xc16x__) || defined (__xc16xL__) || defined (__xc16xS__)
|
|
#define __IEEE_LITTLE_ENDIAN
|
|
#define _FLOAT_ARG float
|
|
#define _DOUBLE_IS_32BITS
|
|
#endif
|
|
|
|
|
|
#ifdef __sh__
|
|
#ifdef __LITTLE_ENDIAN__
|
|
#define __IEEE_LITTLE_ENDIAN
|
|
#else
|
|
#define __IEEE_BIG_ENDIAN
|
|
#endif
|
|
#if defined(__SH2E__) || defined(__SH3E__) || defined(__SH4_SINGLE_ONLY__) || defined(__SH2A_SINGLE_ONLY__)
|
|
#define _DOUBLE_IS_32BITS
|
|
#endif
|
|
#endif
|
|
|
|
#ifdef _AM29K
|
|
#define __IEEE_BIG_ENDIAN
|
|
#endif
|
|
|
|
#ifdef _WIN32
|
|
#define __IEEE_LITTLE_ENDIAN
|
|
#endif
|
|
|
|
#ifdef __i386__
|
|
#define __IEEE_LITTLE_ENDIAN
|
|
# define _SUPPORTS_ERREXCEPT
|
|
#endif
|
|
|
|
#ifdef __riscv
|
|
#if defined(__BYTE_ORDER__) && (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)
|
|
#define __IEEE_BIG_ENDIAN
|
|
#else
|
|
#define __IEEE_LITTLE_ENDIAN
|
|
#endif
|
|
#ifdef __riscv_flen
|
|
# define _SUPPORTS_ERREXCEPT
|
|
#endif
|
|
#endif
|
|
|
|
#ifdef __i960__
|
|
#define __IEEE_LITTLE_ENDIAN
|
|
#endif
|
|
|
|
#ifdef __lm32__
|
|
#define __IEEE_BIG_ENDIAN
|
|
#endif
|
|
|
|
#ifdef __M32R__
|
|
#define __IEEE_BIG_ENDIAN
|
|
#endif
|
|
|
|
#ifdef __nvptx__
|
|
#define __IEEE_LITTLE_ENDIAN
|
|
#endif
|
|
|
|
#if defined(_C4x) || defined(_C3x)
|
|
#define __IEEE_BIG_ENDIAN
|
|
#define _DOUBLE_IS_32BITS
|
|
#endif
|
|
|
|
#ifdef __TMS320C6X__
|
|
#ifdef _BIG_ENDIAN
|
|
#define __IEEE_BIG_ENDIAN
|
|
#else
|
|
#define __IEEE_LITTLE_ENDIAN
|
|
#endif
|
|
#endif
|
|
|
|
#ifdef __TIC80__
|
|
#define __IEEE_LITTLE_ENDIAN
|
|
#endif
|
|
|
|
#ifdef __MIPSEL__
|
|
#define __IEEE_LITTLE_ENDIAN
|
|
#endif
|
|
#ifdef __MIPSEB__
|
|
#define __IEEE_BIG_ENDIAN
|
|
#endif
|
|
|
|
#ifdef __MMIX__
|
|
#define __IEEE_BIG_ENDIAN
|
|
#endif
|
|
|
|
#ifdef __D30V__
|
|
#define __IEEE_BIG_ENDIAN
|
|
#endif
|
|
|
|
/* necv70 was __IEEE_LITTLE_ENDIAN. */
|
|
|
|
#ifdef __W65__
|
|
#define __IEEE_LITTLE_ENDIAN
|
|
#define _DOUBLE_IS_32BITS
|
|
#endif
|
|
|
|
#if defined(__Z8001__) || defined(__Z8002__)
|
|
#define __IEEE_BIG_ENDIAN
|
|
#endif
|
|
|
|
#ifdef __m88k__
|
|
#define __IEEE_BIG_ENDIAN
|
|
#endif
|
|
|
|
#ifdef __mn10300__
|
|
#define __IEEE_LITTLE_ENDIAN
|
|
#endif
|
|
|
|
#ifdef __mn10200__
|
|
#define __IEEE_LITTLE_ENDIAN
|
|
#define _DOUBLE_IS_32BITS
|
|
#endif
|
|
|
|
#ifdef __v800
|
|
#define __IEEE_LITTLE_ENDIAN
|
|
#endif
|
|
|
|
#ifdef __v850
|
|
#define __IEEE_LITTLE_ENDIAN
|
|
#endif
|
|
|
|
#ifdef __D10V__
|
|
#define __IEEE_BIG_ENDIAN
|
|
#if __DOUBLE__ == 32
|
|
#define _DOUBLE_IS_32BITS
|
|
#endif
|
|
#endif
|
|
|
|
#ifdef __PPC__
|
|
#if (defined(_BIG_ENDIAN) && _BIG_ENDIAN) || (defined(_AIX) && _AIX)
|
|
#define __IEEE_BIG_ENDIAN
|
|
#else
|
|
#if (defined(_LITTLE_ENDIAN) && _LITTLE_ENDIAN) || (defined(__sun__) && __sun__) || (defined(_WIN32) && _WIN32)
|
|
#define __IEEE_LITTLE_ENDIAN
|
|
#endif
|
|
#endif
|
|
#endif
|
|
|
|
#ifdef __xstormy16__
|
|
#define __IEEE_LITTLE_ENDIAN
|
|
#endif
|
|
|
|
#ifdef __arc__
|
|
#ifdef __big_endian__
|
|
#define __IEEE_BIG_ENDIAN
|
|
#else
|
|
#define __IEEE_LITTLE_ENDIAN
|
|
#endif
|
|
#endif
|
|
|
|
#ifdef __CRX__
|
|
#define __IEEE_LITTLE_ENDIAN
|
|
#endif
|
|
|
|
#ifdef __CSKY__
|
|
#ifdef __CSKYBE__
|
|
#define __IEEE_BIG_ENDIAN
|
|
#else
|
|
#define __IEEE_LITTLE_ENDIAN
|
|
#endif
|
|
#endif
|
|
|
|
#ifdef __fr30__
|
|
#define __IEEE_BIG_ENDIAN
|
|
#endif
|
|
|
|
#ifdef __FT32__
|
|
#define __IEEE_LITTLE_ENDIAN
|
|
#endif
|
|
|
|
#ifdef __mcore__
|
|
#define __IEEE_BIG_ENDIAN
|
|
#endif
|
|
|
|
#ifdef __mt__
|
|
#define __IEEE_BIG_ENDIAN
|
|
#endif
|
|
|
|
#ifdef __frv__
|
|
#define __IEEE_BIG_ENDIAN
|
|
#endif
|
|
|
|
#ifdef __moxie__
|
|
#ifdef __MOXIE_BIG_ENDIAN__
|
|
#define __IEEE_BIG_ENDIAN
|
|
#else
|
|
#define __IEEE_LITTLE_ENDIAN
|
|
#endif
|
|
#endif
|
|
|
|
#ifdef __ia64__
|
|
#ifdef __BIG_ENDIAN__
|
|
#define __IEEE_BIG_ENDIAN
|
|
#else
|
|
#define __IEEE_LITTLE_ENDIAN
|
|
#endif
|
|
#endif
|
|
|
|
#ifdef __AVR__
|
|
#define __IEEE_LITTLE_ENDIAN
|
|
#define _DOUBLE_IS_32BITS
|
|
#endif
|
|
|
|
#if defined(__or1k__) || defined(__OR1K__) || defined(__OR1KND__)
|
|
#define __IEEE_BIG_ENDIAN
|
|
#endif
|
|
|
|
#ifdef __IP2K__
|
|
#define __IEEE_BIG_ENDIAN
|
|
#define __SMALL_BITFIELDS
|
|
#define _DOUBLE_IS_32BITS
|
|
#endif
|
|
|
|
#ifdef __iq2000__
|
|
#define __IEEE_BIG_ENDIAN
|
|
#endif
|
|
|
|
#ifdef __MAVERICK__
|
|
#ifdef __ARMEL__
|
|
# define __IEEE_LITTLE_ENDIAN
|
|
#else /* must be __ARMEB__ */
|
|
# define __IEEE_BIG_ENDIAN
|
|
#endif /* __ARMEL__ */
|
|
#endif /* __MAVERICK__ */
|
|
|
|
#ifdef __m32c__
|
|
#define __IEEE_LITTLE_ENDIAN
|
|
#define __SMALL_BITFIELDS
|
|
#endif
|
|
|
|
#ifdef __CRIS__
|
|
#define __IEEE_LITTLE_ENDIAN
|
|
#endif
|
|
|
|
#ifdef __BFIN__
|
|
#define __IEEE_LITTLE_ENDIAN
|
|
#endif
|
|
|
|
#ifdef __x86_64__
|
|
#define __IEEE_LITTLE_ENDIAN
|
|
# define _SUPPORTS_ERREXCEPT
|
|
#endif
|
|
|
|
#ifdef __mep__
|
|
#ifdef __LITTLE_ENDIAN__
|
|
#define __IEEE_LITTLE_ENDIAN
|
|
#else
|
|
#define __IEEE_BIG_ENDIAN
|
|
#endif
|
|
#endif
|
|
|
|
#ifdef __MICROBLAZE__
|
|
#ifndef __MICROBLAZEEL__
|
|
#define __IEEE_BIG_ENDIAN
|
|
#else
|
|
#define __IEEE_LITTLE_ENDIAN
|
|
#endif
|
|
#endif
|
|
|
|
#ifdef __MSP430__
|
|
#define __IEEE_LITTLE_ENDIAN
|
|
#define __SMALL_BITFIELDS /* 16 Bit INT */
|
|
#endif
|
|
|
|
#ifdef __PRU__
|
|
#define __IEEE_LITTLE_ENDIAN
|
|
#endif
|
|
|
|
#ifdef __RL78__
|
|
#define __IEEE_LITTLE_ENDIAN
|
|
#define __SMALL_BITFIELDS /* 16 Bit INT */
|
|
#ifndef __RL78_64BIT_DOUBLES__
|
|
#define _DOUBLE_IS_32BITS
|
|
#endif
|
|
#endif
|
|
|
|
#ifdef __RX__
|
|
|
|
#ifdef __RX_BIG_ENDIAN__
|
|
#define __IEEE_BIG_ENDIAN
|
|
#else
|
|
#define __IEEE_LITTLE_ENDIAN
|
|
#endif
|
|
|
|
#ifndef __RX_64BIT_DOUBLES__
|
|
#define _DOUBLE_IS_32BITS
|
|
#endif
|
|
|
|
#ifdef __RX_16BIT_INTS__
|
|
#define __SMALL_BITFIELDS
|
|
#endif
|
|
|
|
#endif
|
|
|
|
#if (defined(__CR16__) || defined(__CR16C__) ||defined(__CR16CP__))
|
|
#define __IEEE_LITTLE_ENDIAN
|
|
#define __SMALL_BITFIELDS /* 16 Bit INT */
|
|
#endif
|
|
|
|
#ifdef __NIOS2__
|
|
# ifdef __nios2_big_endian__
|
|
# define __IEEE_BIG_ENDIAN
|
|
# else
|
|
# define __IEEE_LITTLE_ENDIAN
|
|
# endif
|
|
#endif
|
|
|
|
#ifdef __VISIUM__
|
|
#define __IEEE_BIG_ENDIAN
|
|
#endif
|
|
|
|
#ifdef __AMDGCN__
|
|
#define __IEEE_LITTLE_ENDIAN
|
|
#endif
|
|
|
|
#ifdef __XTENSA_EL__
|
|
#define __IEEE_LITTLE_ENDIAN
|
|
#endif
|
|
|
|
#ifdef __CYGWIN__
|
|
#define __OBSOLETE_MATH_DEFAULT 0
|
|
#endif
|
|
|
|
#ifndef __OBSOLETE_MATH_DEFAULT
|
|
/* Use old math code by default. */
|
|
#define __OBSOLETE_MATH_DEFAULT 1
|
|
#endif
|
|
#ifndef __OBSOLETE_MATH
|
|
#define __OBSOLETE_MATH __OBSOLETE_MATH_DEFAULT
|
|
#endif
|
|
|
|
#ifndef __IEEE_BIG_ENDIAN
|
|
#ifndef __IEEE_LITTLE_ENDIAN
|
|
#error Endianess not declared!!
|
|
#endif /* not __IEEE_LITTLE_ENDIAN */
|
|
#endif /* not __IEEE_BIG_ENDIAN */
|
|
|
|
#endif /* not __IEEE_LITTLE_ENDIAN */
|
|
#endif /* not __IEEE_BIG_ENDIAN */
|
|
|