534 lines
11 KiB
C
534 lines
11 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_32BITS
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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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__OBSOLETE_MATH_DEFAULT
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Default value for __OBSOLETE_MATH if that's not set by the user.
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It should be set here based on predefined feature macros.
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__OBSOLETE_MATH
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If set to 1 then some new math code will be disabled and older libm
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code will be used instead. This is necessary because the new math
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code does not support all targets, it assumes that the toolchain has
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ISO C99 support (hexfloat literals, standard fenv semantics), the
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target has IEEE-754 conforming binary32 float and binary64 double
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(not mixed endian) representation, standard SNaN representation,
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double and single precision arithmetics has similar latency and it
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has no legacy SVID matherr support, only POSIX errno and fenv
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exception based error handling.
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*/
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#if (defined(__arm__) || defined(__thumb__)) && !defined(__MAVERICK__)
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/* ARM traditionally used big-endian words; and within those words the
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byte ordering was big or little endian depending upon the target.
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Modern floating-point formats are naturally ordered; in this case
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__VFP_FP__ will be defined, even if soft-float. */
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#ifdef __VFP_FP__
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# ifdef __ARMEL__
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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 __ARM_FP & 0x8
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# define __OBSOLETE_MATH_DEFAULT 0
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# endif
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#else
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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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#ifndef __SOFTFP__
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# define _SUPPORTS_ERREXCEPT
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#endif
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/* As per ISO/IEC TS 18661 '__FLT_EVAL_METHOD__' will be defined to 16
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(if compiling with +fp16 support) so it can't be used by math.h to
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define float_t and double_t. For values of '__FLT_EVAL_METHOD__'
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other than 0, 1, 2 the definition of float_t and double_t is
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implementation-defined. */
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#define __DOUBLE_TYPE double
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#define __FLOAT_TYPE float
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#endif
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#if defined (__aarch64__)
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#if defined (__AARCH64EL__)
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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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#define __OBSOLETE_MATH_DEFAULT 0
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#ifdef __ARM_FP
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# define _SUPPORTS_ERREXCEPT
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#endif
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/* As per ISO/IEC TS 18661 '__FLT_EVAL_METHOD__' will be defined to 16
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(if compiling with +fp16 support) so it can't be used by math.h to
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define float_t and double_t. For values of '__FLT_EVAL_METHOD__'
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other than 0, 1, 2 the definition of float_t and double_t is
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implementation-defined. */
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#define __DOUBLE_TYPE double
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#define __FLOAT_TYPE float
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#endif
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#ifdef __epiphany__
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#define __IEEE_LITTLE_ENDIAN
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#define Sudden_Underflow 1
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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 __nds32__
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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 __SPU__
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#define __IEEE_BIG_ENDIAN
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#define isfinite(__y) \
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(__extension__ ({int __cy; \
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(sizeof (__y) == sizeof (float)) ? (1) : \
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(__cy = fpclassify(__y)) != FP_INFINITE && __cy != FP_NAN;}))
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#define isinf(__x) ((sizeof (__x) == sizeof (float)) ? (0) : __isinfd(__x))
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#define isnan(__x) ((sizeof (__x) == sizeof (float)) ? (0) : __isnand(__x))
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/*
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* Macros for use in ieeefp.h. We can't just define the real ones here
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* (like those above) as we have name space issues when this is *not*
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* included via generic the ieeefp.h.
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*/
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#define __ieeefp_isnanf(x) 0
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#define __ieeefp_isinff(x) 0
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#define __ieeefp_finitef(x) 1
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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__) || defined (__H8300SX__)
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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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#if defined (__xc16x__) || defined (__xc16xL__) || defined (__xc16xS__)
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#define __IEEE_LITTLE_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__) || defined(__SH2A_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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# define _SUPPORTS_ERREXCEPT
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#endif
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#ifdef __riscv
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#if defined(__BYTE_ORDER__) && (__BYTE_ORDER__ == __ORDER_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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#if defined(__riscv_flen) || defined (__riscv_zfinx)
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# define _SUPPORTS_ERREXCEPT
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#endif
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#if (__riscv_flen == 64) || defined (__riscv_zdinx)
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# define __OBSOLETE_MATH_DEFAULT 0
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#else
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# define __OBSOLETE_MATH_DEFAULT 1
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#endif
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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 __lm32__
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#define __IEEE_BIG_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 __nvptx__
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#define __IEEE_LITTLE_ENDIAN
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#endif
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#if defined(_C4x) || defined(_C3x)
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#define __IEEE_BIG_ENDIAN
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#define _DOUBLE_IS_32BITS
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#endif
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#ifdef __TMS320C6X__
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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 __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 __CRX__
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#define __IEEE_LITTLE_ENDIAN
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#endif
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#ifdef __CSKY__
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#ifdef __CSKYBE__
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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 __FT32__
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#define __IEEE_LITTLE_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 __mt__
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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 __moxie__
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#ifdef __MOXIE_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 __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(__or1k__) || defined(__OR1K__) || defined(__OR1KND__)
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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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#ifdef __iq2000__
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#define __IEEE_BIG_ENDIAN
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#endif
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#ifdef __MAVERICK__
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#ifdef __ARMEL__
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# define __IEEE_LITTLE_ENDIAN
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#else /* must be __ARMEB__ */
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# define __IEEE_BIG_ENDIAN
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#endif /* __ARMEL__ */
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#endif /* __MAVERICK__ */
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#ifdef __m32c__
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#define __IEEE_LITTLE_ENDIAN
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#define __SMALL_BITFIELDS
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#endif
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#ifdef __CRIS__
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#define __IEEE_LITTLE_ENDIAN
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#endif
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#ifdef __BFIN__
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#define __IEEE_LITTLE_ENDIAN
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#endif
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#ifdef __x86_64__
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#define __IEEE_LITTLE_ENDIAN
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# define _SUPPORTS_ERREXCEPT
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#endif
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#ifdef __mep__
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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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#endif
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#ifdef __MICROBLAZE__
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#ifndef __MICROBLAZEEL__
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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 __MSP430__
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#define __IEEE_LITTLE_ENDIAN
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#define __SMALL_BITFIELDS /* 16 Bit INT */
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#endif
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#ifdef __PRU__
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#define __IEEE_LITTLE_ENDIAN
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#endif
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#ifdef __RL78__
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#define __IEEE_LITTLE_ENDIAN
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#define __SMALL_BITFIELDS /* 16 Bit INT */
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#ifndef __RL78_64BIT_DOUBLES__
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#define _DOUBLE_IS_32BITS
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#endif
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#endif
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#ifdef __RX__
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#ifdef __RX_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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#ifndef __RX_64BIT_DOUBLES__
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#define _DOUBLE_IS_32BITS
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#endif
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#ifdef __RX_16BIT_INTS__
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#define __SMALL_BITFIELDS
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#endif
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#endif
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#if (defined(__CR16__) || defined(__CR16C__) ||defined(__CR16CP__))
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#define __IEEE_LITTLE_ENDIAN
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#define __SMALL_BITFIELDS /* 16 Bit INT */
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#endif
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#ifdef __NIOS2__
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# ifdef __nios2_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 __VISIUM__
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#define __IEEE_BIG_ENDIAN
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#endif
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#ifdef __AMDGCN__
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#define __IEEE_LITTLE_ENDIAN
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#endif
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#ifdef __XTENSA_EL__
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#define __IEEE_LITTLE_ENDIAN
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#endif
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#ifdef __XTENSA_EB__
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#define __IEEE_BIG_ENDIAN
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#endif
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#ifdef __CYGWIN__
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#define __OBSOLETE_MATH_DEFAULT 0
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#endif
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#ifndef __OBSOLETE_MATH_DEFAULT
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/* Use old math code by default. */
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#define __OBSOLETE_MATH_DEFAULT 1
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#endif
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#ifndef __OBSOLETE_MATH
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#define __OBSOLETE_MATH __OBSOLETE_MATH_DEFAULT
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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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