246 lines
4.9 KiB
C
246 lines
4.9 KiB
C
#ifndef __IEEE_BIG_ENDIAN
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#ifndef __IEEE_LITTLE_ENDIAN
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/* This file can define macros to choose variations of the IEEE float
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format:
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_FLT_LARGEST_EXPONENT_IS_NORMAL
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Defined if the float format uses the largest exponent for finite
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numbers rather than NaN and infinity representations. Such a
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format cannot represent NaNs or infinities at all, but it's FLT_MAX
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is twice the IEEE value.
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_FLT_NO_DENORMALS
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Defined if the float format does not support IEEE denormals. Every
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float with a zero exponent is taken to be a zero representation.
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??? At the moment, there are no equivalent macros above for doubles and
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the macros are not fully supported by --enable-newlib-hw-fp.
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__IEEE_BIG_ENDIAN
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Defined if the float format is big endian. This is mutually exclusive
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with __IEEE_LITTLE_ENDIAN.
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__IEEE_LITTLE_ENDIAN
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Defined if the float format is little endian. This is mutually exclusive
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with __IEEE_BIG_ENDIAN.
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Note that one of __IEEE_BIG_ENDIAN or __IEEE_LITTLE_ENDIAN must be specified for a
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platform or error will occur.
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__IEEE_BYTES_LITTLE_ENDIAN
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This flag is used in conjunction with __IEEE_BIG_ENDIAN to describe a situation
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whereby multiple words of an IEEE floating point are in big endian order, but the
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words themselves are little endian with respect to the bytes.
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_DOUBLE_IS_32_BITS
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This is used on platforms that support double by using the 32-bit IEEE
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float type.
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_FLOAT_ARG
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This represents what type a float arg is passed as. It is used when the type is
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not promoted to double.
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*/
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#if (defined(__arm__) || defined(__thumb__))
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/* ARM always has big-endian words. Within those words the byte ordering
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will be big or little endian depending upon the target. */
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#define __IEEE_BIG_ENDIAN
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#ifdef __ARMEL__
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#define __IEEE_BYTES_LITTLE_ENDIAN
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#endif
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#endif
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#ifdef __hppa__
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#define __IEEE_BIG_ENDIAN
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#endif
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#ifdef __sparc__
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#ifdef __LITTLE_ENDIAN_DATA__
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#define __IEEE_LITTLE_ENDIAN
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#else
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#define __IEEE_BIG_ENDIAN
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#endif
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#endif
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#if defined(__m68k__) || defined(__mc68000__)
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#define __IEEE_BIG_ENDIAN
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#endif
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#if defined(__mc68hc11__) || defined(__mc68hc12__) || defined(__mc68hc1x__)
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#define __IEEE_BIG_ENDIAN
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#ifdef __HAVE_SHORT_DOUBLE__
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# define _DOUBLE_IS_32BITS
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#endif
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#endif
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#if defined (__H8300__) || defined (__H8300H__) || defined (__H8300S__) || defined (__H8500__)
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#define __IEEE_BIG_ENDIAN
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#define _FLOAT_ARG float
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#define _DOUBLE_IS_32BITS
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#endif
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#ifdef __sh__
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#ifdef __LITTLE_ENDIAN__
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#define __IEEE_LITTLE_ENDIAN
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#else
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#define __IEEE_BIG_ENDIAN
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#endif
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#if defined(__SH2E__) || defined(__SH3E__) || defined(__SH4_SINGLE_ONLY__)
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#define _DOUBLE_IS_32BITS
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#endif
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#endif
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#ifdef _AM29K
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#define __IEEE_BIG_ENDIAN
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#endif
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#ifdef _WIN32
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#define __IEEE_LITTLE_ENDIAN
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#endif
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#ifdef __i386__
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#define __IEEE_LITTLE_ENDIAN
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#endif
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#ifdef __i960__
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#define __IEEE_LITTLE_ENDIAN
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#endif
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#ifdef __M32R__
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#define __IEEE_BIG_ENDIAN
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#endif
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#ifdef __TIC80__
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#define __IEEE_LITTLE_ENDIAN
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#endif
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#ifdef __MIPSEL__
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#define __IEEE_LITTLE_ENDIAN
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#endif
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#ifdef __MIPSEB__
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#define __IEEE_BIG_ENDIAN
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#endif
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#ifdef __MMIX__
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#define __IEEE_BIG_ENDIAN
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#endif
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#ifdef __D30V__
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#define __IEEE_BIG_ENDIAN
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#endif
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/* necv70 was __IEEE_LITTLE_ENDIAN. */
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#ifdef __W65__
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#define __IEEE_LITTLE_ENDIAN
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#define _DOUBLE_IS_32BITS
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#endif
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#if defined(__Z8001__) || defined(__Z8002__)
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#define __IEEE_BIG_ENDIAN
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#endif
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#ifdef __m88k__
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#define __IEEE_BIG_ENDIAN
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#endif
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#ifdef __mn10300__
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#define __IEEE_LITTLE_ENDIAN
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#endif
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#ifdef __mn10200__
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#define __IEEE_LITTLE_ENDIAN
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#define _DOUBLE_IS_32BITS
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#endif
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#ifdef __v800
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#define __IEEE_LITTLE_ENDIAN
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#endif
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#ifdef __v850
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#define __IEEE_LITTLE_ENDIAN
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#endif
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#ifdef __D10V__
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#define __IEEE_BIG_ENDIAN
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#if __DOUBLE__ == 32
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#define _DOUBLE_IS_32BITS
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#endif
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#endif
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#ifdef __PPC__
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#if (defined(_BIG_ENDIAN) && _BIG_ENDIAN) || (defined(_AIX) && _AIX)
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#define __IEEE_BIG_ENDIAN
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#else
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#if (defined(_LITTLE_ENDIAN) && _LITTLE_ENDIAN) || (defined(__sun__) && __sun__) || (defined(_WIN32) && _WIN32)
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#define __IEEE_LITTLE_ENDIAN
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#endif
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#endif
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#endif
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#ifdef __xstormy16__
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#define __IEEE_LITTLE_ENDIAN
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#endif
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#ifdef __arc__
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#ifdef __big_endian__
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#define __IEEE_BIG_ENDIAN
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#else
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#define __IEEE_LITTLE_ENDIAN
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#endif
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#endif
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#ifdef __fr30__
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#define __IEEE_BIG_ENDIAN
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#endif
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#ifdef __mcore__
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#define __IEEE_BIG_ENDIAN
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#endif
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#ifdef __frv__
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#define __IEEE_BIG_ENDIAN
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#endif
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#ifdef __ia64__
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#ifdef __BIG_ENDIAN__
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#define __IEEE_BIG_ENDIAN
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#else
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#define __IEEE_LITTLE_ENDIAN
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#endif
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#endif
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#ifdef __AVR__
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#define __IEEE_LITTLE_ENDIAN
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#define _DOUBLE_IS_32BITS
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#endif
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#if defined(__or32__) || defined(__or1k__) || defined(__or16__)
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#define __IEEE_BIG_ENDIAN
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#endif
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#ifdef __IP2K__
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#define __IEEE_BIG_ENDIAN
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#define __SMALL_BITFIELDS
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#define _DOUBLE_IS_32BITS
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#endif
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#ifndef __IEEE_BIG_ENDIAN
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#ifndef __IEEE_LITTLE_ENDIAN
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#error Endianess not declared!!
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#endif /* not __IEEE_LITTLE_ENDIAN */
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#endif /* not __IEEE_BIG_ENDIAN */
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#endif /* not __IEEE_LITTLE_ENDIAN */
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#endif /* not __IEEE_BIG_ENDIAN */
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