Inconsistent results on different machine

[dipterix]

I tested bit64::as.integer64(2^63) on x86 ubuntu vs ARM M1 OSX,

# Ubuntu
> bit64::as.integer64(2^63)
integer64
[1] <NA>

# M1, OSX
> bit64::as.integer64(2^63)
integer64
[1] 9223372036854775807

I was wondering if this is expected behavior?

I tested the following script:

print_bit <- Rcpp::cppFunction(r"(
SEXP print_bit(SEXP obj){

  int64_t tmp1 = *REAL0(obj);
  printf("%lld ", tmp1);

  return(R_NilValue);
}
)")
print_bit(2^63)

On x64 ubuntu server, print_bit(2^63) prints -9223372036854775808, but on M1 mac, it prints 9223372036854775807

[dipterix]

https://stat.ethz.ch/pipermail/r-devel/2021-August/080986.html