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Improve rand.shuffle further by splitting into 64-bit and 32-bit parts

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gingerBill
2024-07-16 18:36:31 +01:00
parent ba49950454
commit 0d881e1561
1 changed files with 7 additions and 1 deletions
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core/math/rand/rand.odin
+7 -1
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@@ -618,10 +618,16 @@ shuffle :: proc(array: $T/[]$E, gen := context.random_generator) {
return return
} }
for i := i64(n - 2); i >= 0; i -= 1 { i := n - 1
for ; i > (1<<31 - 2); i -= 1 {
j := int63_max(i + 1, gen) j := int63_max(i + 1, gen)
array[i], array[j] = array[j], array[i] array[i], array[j] = array[j], array[i]
} }
for ; i > 0; i -= 1 {
j := int31_max(i32(i + 1), gen)
array[i], array[j] = array[j], array[i]
}
} }
/* /*