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jets: fix bex overallocation #248

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jets: fix bex overallocation #248

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2 changes: 1 addition & 1 deletion rust/ares/src/jets/bits.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -310,7 +310,7 @@ pub mod util {
if arg < 63 {
DirectAtom::new_unchecked(1 << arg).as_atom()
} else {
let (mut atom, dest) = IndirectAtom::new_raw_mut_bitslice(stack, (arg + 7) >> 3);
let (mut atom, dest) = IndirectAtom::new_raw_mut_bitslice(stack, (arg + 7) >> 5);
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The old code was correct for bytes. This new code wouldn't be quite right for 32 bit words, but Ares is using 64 bit words.

32-bit: (arg + 31) >> 5
64-bit: (arg + 63) >> 6

dest.set(arg, true);
atom.normalize_as_atom()
}
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