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sfp-machine.h revision 1.1.1.1 
      1 #ifdef __MINGW32__
      2   /* Make sure we are using gnu-style bitfield handling.  */
      3 #define _FP_STRUCT_LAYOUT  __attribute__ ((gcc_struct))
      4 #endif
      5 
      6 /* The type of the result of a floating point comparison.  This must
      7    match `__libgcc_cmp_return__' in GCC for the target.  */
      8 typedef int __gcc_CMPtype __attribute__ ((mode (__libgcc_cmp_return__)));
      9 #define CMPtype __gcc_CMPtype
     10 
     11 #ifdef __x86_64__
     12 #include "config/i386/64/sfp-machine.h"
     13 #else
     14 #include "config/i386/32/sfp-machine.h"
     15 #endif
     16 
     17 #define _FP_KEEPNANFRACP	1
     18 
     19 #define _FP_NANSIGN_S		1
     20 #define _FP_NANSIGN_D		1
     21 #define _FP_NANSIGN_E		1
     22 #define _FP_NANSIGN_Q		1
     23 
     24 /* Here is something Intel misdesigned: the specs don't define
     25    the case where we have two NaNs with same mantissas, but
     26    different sign. Different operations pick up different NaNs.  */
     27 #define _FP_CHOOSENAN(fs, wc, R, X, Y, OP)			\
     28   do {								\
     29     if (_FP_FRAC_GT_##wc(X, Y)					\
     30 	|| (_FP_FRAC_EQ_##wc(X,Y) && (OP == '+' || OP == '*')))	\
     31       {								\
     32 	R##_s = X##_s;						\
     33 	_FP_FRAC_COPY_##wc(R,X);				\
     34       }								\
     35     else							\
     36       {								\
     37 	R##_s = Y##_s;						\
     38 	_FP_FRAC_COPY_##wc(R,Y);				\
     39       }								\
     40     R##_c = FP_CLS_NAN;						\
     41   } while (0)
     42 
     43 #ifndef _SOFT_FLOAT
     44 #define FP_EX_INVALID		0x01
     45 #define FP_EX_DENORM		0x02
     46 #define FP_EX_DIVZERO		0x04
     47 #define FP_EX_OVERFLOW		0x08
     48 #define FP_EX_UNDERFLOW		0x10
     49 #define FP_EX_INEXACT		0x20
     50 #define FP_EX_ALL \
     51 	(FP_EX_INVALID | FP_EX_DENORM | FP_EX_DIVZERO | FP_EX_OVERFLOW \
     52 	 | FP_EX_UNDERFLOW | FP_EX_INEXACT)
     53 
     54 void __sfp_handle_exceptions (int);
     55 
     56 #define FP_HANDLE_EXCEPTIONS			\
     57   do {						\
     58     if (__builtin_expect (_fex, 0))		\
     59       __sfp_handle_exceptions (_fex);		\
     60   } while (0);
     61 
     62 #define FP_TRAPPING_EXCEPTIONS ((~_fcw >> FP_EX_SHIFT) & FP_EX_ALL)
     63 
     64 #define FP_ROUNDMODE		(_fcw & FP_RND_MASK)
     65 #endif
     66 
     67 #define	__LITTLE_ENDIAN	1234
     68 #define	__BIG_ENDIAN	4321
     69 
     70 #define __BYTE_ORDER __LITTLE_ENDIAN
     71 
     72 /* Define ALIASNAME as a strong alias for NAME.  */
     73 #if defined __MACH__
     74 /* Mach-O doesn't support aliasing.  If these functions ever return
     75    anything but CMPtype we need to revisit this... */
     76 #define strong_alias(name, aliasname) \
     77   CMPtype aliasname (TFtype a, TFtype b) { return name(a, b); }
     78 #else
     79 # define strong_alias(name, aliasname) _strong_alias(name, aliasname)
     80 # define _strong_alias(name, aliasname) \
     81   extern __typeof (name) aliasname __attribute__ ((alias (#name)));
     82 #endif
     83