gcc/libgcc/config/i386/sfp-machine.h

#ifdef __MINGW32__
  /* Make sure we are using gnu-style bitfield handling.  */
#define _FP_STRUCT_LAYOUT  __attribute__ ((gcc_struct))
#endif

/* The type of the result of a floating point comparison.  This must
   match `__libgcc_cmp_return__' in GCC for the target.  */
typedef int __gcc_CMPtype __attribute__ ((mode (__libgcc_cmp_return__)));
#define CMPtype __gcc_CMPtype

#ifdef __x86_64__
#include "config/i386/64/sfp-machine.h"
#else
#include "config/i386/32/sfp-machine.h"
#endif

#define _FP_KEEPNANFRACP	1
#define _FP_QNANNEGATEDP 0

#define _FP_NANSIGN_H		1
#define _FP_NANSIGN_B		1
#define _FP_NANSIGN_S		1
#define _FP_NANSIGN_D		1
#define _FP_NANSIGN_E		1
#define _FP_NANSIGN_Q		1

/* Here is something Intel misdesigned: the specs don't define
   the case where we have two NaNs with same mantissas, but
   different sign. Different operations pick up different NaNs.  */
#define _FP_CHOOSENAN(fs, wc, R, X, Y, OP)			\
  do {								\
    if (_FP_FRAC_GT_##wc(X, Y)					\
	|| (_FP_FRAC_EQ_##wc(X,Y) && (OP == '+' || OP == '*')))	\
      {								\
	R##_s = X##_s;						\
	_FP_FRAC_COPY_##wc(R,X);				\
      }								\
    else							\
      {								\
	R##_s = Y##_s;						\
	_FP_FRAC_COPY_##wc(R,Y);				\
      }								\
    R##_c = FP_CLS_NAN;						\
  } while (0)

#ifndef _SOFT_FLOAT
#define FP_EX_INVALID		0x01
#define FP_EX_DENORM		0x02
#define FP_EX_DIVZERO		0x04
#define FP_EX_OVERFLOW		0x08
#define FP_EX_UNDERFLOW		0x10
#define FP_EX_INEXACT		0x20
#define FP_EX_ALL \
	(FP_EX_INVALID | FP_EX_DENORM | FP_EX_DIVZERO | FP_EX_OVERFLOW \
	 | FP_EX_UNDERFLOW | FP_EX_INEXACT)

void __sfp_handle_exceptions (int);

#define FP_HANDLE_EXCEPTIONS			\
  do {						\
    if (__builtin_expect (_fex, 0))		\
      __sfp_handle_exceptions (_fex);		\
  } while (0)

#define FP_TRAPPING_EXCEPTIONS ((~_fcw >> FP_EX_SHIFT) & FP_EX_ALL)

#define FP_ROUNDMODE		(_fcw & FP_RND_MASK)
#endif

#define _FP_TININESS_AFTER_ROUNDING 1

#define	__LITTLE_ENDIAN	1234
#define	__BIG_ENDIAN	4321

#define __BYTE_ORDER __LITTLE_ENDIAN

/* Define ALIASNAME as a strong alias for NAME.  */
#if defined __APPLE__
/* Mach-O doesn't support aliasing, so we build a secondary function for
   the alias - we need to do a bit of a dance to find out what the type of
   the arguments is and then apply that to the secondary function.
   If these functions ever return anything but CMPtype we need to revisit
   this... */
typedef float alias_HFtype __attribute__ ((mode (HF)));
typedef float alias_SFtype __attribute__ ((mode (SF)));
typedef float alias_DFtype __attribute__ ((mode (DF)));
typedef float alias_TFtype __attribute__ ((mode (TF)));
#define ALIAS_SELECTOR \
  CMPtype (*) (alias_HFtype, alias_HFtype): (alias_HFtype) 0, \
  CMPtype (*) (alias_SFtype, alias_SFtype): (alias_SFtype) 0, \
  CMPtype (*) (alias_DFtype, alias_DFtype): (alias_DFtype) 0, \
  CMPtype (*) (alias_TFtype, alias_TFtype): (alias_TFtype) 0
#define strong_alias(name, aliasname) \
  CMPtype aliasname (__typeof (_Generic (name, ALIAS_SELECTOR)) a, \
		     __typeof (_Generic (name, ALIAS_SELECTOR)) b) \
		    { return name (a, b); }
#else
# define strong_alias(name, aliasname) _strong_alias(name, aliasname)
# define _strong_alias(name, aliasname) \
  extern __typeof (name) aliasname __attribute__ ((alias (#name)));
#endif