As an extension the integer scalar type __int128
is supported for targets which have an integer mode wide enough to hold 128 bits. Simply write __int128
for a signed 128-bit integer, or unsigned __int128
for an unsigned 128-bit integer. There is no support in GCC for expressing an integer constant of type __int128
for targets with long long
integer less than 128 bits wide.
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https://gcc.gnu.org/onlinedocs/gcc-7.2.0/gcc/_005f_005fint128.html