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Inconsistent results on different machine #19

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dipterix opened this issue Aug 11, 2021 · 1 comment
Open

Inconsistent results on different machine #19

dipterix opened this issue Aug 11, 2021 · 1 comment

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@dipterix
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dipterix commented Aug 11, 2021 •
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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
This was referenced Aug 11, 2021
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@dipterix
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https://stat.ethz.ch/pipermail/r-devel/2021-August/080986.html

hhoeflin pushed a commit to hhoeflin/hdf5r that referenced this issue Aug 14, 2021
@dipterix
Fixed a test on NA (#179)
7e2d84d 
* added github actions to check the repo

* added build ignore for gh action checks; set system path to include h5cc

* minor fix for non-osx

* updated to HDF5 1.12.1

* See #178 and r-lib/bit64#19
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@dipterix