diff options
Diffstat (limited to 'gcc/hwint.h')
| -rw-r--r-- | gcc/hwint.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/gcc/hwint.h b/gcc/hwint.h index 4fed004..ccf624f 100644 --- a/gcc/hwint.h +++ b/gcc/hwint.h @@ -116,4 +116,27 @@ extern char sizeof_long_long_must_be_8[sizeof(long long) == 8 ? 1 : -1]; # define HOST_WIDEST_INT_PRINT_DOUBLE_HEX "0x%llx%016llx" #endif +/* Define HOST_WIDEST_FAST_INT to the widest integer type supported + efficiently in hardware. (That is, the widest integer type that fits + in a hardware register.) Normally this is "long" but on some hosts it + should be "long long" or "__int64". This is no convenient way to + autodect this, so such systems must set a flag in config.host; see there + for details. */ + +#ifdef USE_LONG_LONG_FOR_WIDEST_FAST_INT +# ifdef HAVE_LONG_LONG +# define HOST_WIDEST_FAST_INT long long +# define HOST_BITS_PER_WIDEST_FAST_INT HOST_BITS_PER_LONGLONG +# elif defined (HAVE___INT64) +# define HOST_WIDEST_FAST_INT __int64 +# define HOST_BITS_PER_WIDEST_FAST_INT HOST_BITS_PER___INT64 +# else +# error "Your host said it wantted to use long long or __int64 but neither" +# error "exist" +# endif +#else +# define HOST_WIDEST_FAST_INT long +# define HOST_BITS_PER_WIDEST_FAST_INT HOST_BITS_PER_LONG +#endif + #endif /* ! GCC_HWINT_H */ |