ZMZ91 commented on code in PR #14073:
URL: https://github.com/apache/arrow/pull/14073#discussion_r990574834
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cpp/src/gandiva/random_generator_holder.h:
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@@ -40,10 +40,9 @@ class GANDIVA_EXPORT RandomGeneratorHolder : public
FunctionHolder {
double operator()() { return distribution_(generator_); }
private:
- explicit RandomGeneratorHolder(int seed) : distribution_(0, 1) {
- int64_t seed64 = static_cast<int64_t>(seed);
- seed64 = (seed64 ^ 0x00000005DEECE66D) & 0x0000ffffffffffff;
- generator_.seed(static_cast<uint64_t>(seed64));
+ explicit RandomGeneratorHolder(int64_t seed) : distribution_(0, 1) {
+ seed = (seed ^ 0x00000005DEECE66D) & 0x0000ffffffffffff;
Review Comment:
Actually I'm not clear why it's this formula and just keep it as since the
beginning.
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