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std.HashMap.autoHash: use xor instead of wrapping mult

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This commit is contained in:
Andrew Kelley 2018-08-06 19:09:22 -04:00
parent 2680f9ab48
commit 97be8debab
1 changed files with 2 additions and 2 deletions
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4
std/hash_map.zig
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@ -441,9 +441,9 @@ pub fn autoHash(key: var, comptime rng: *std.rand.Random, comptime HashInt: type
builtin.TypeId.Int => |info| {
const unsigned_x = @bitCast(@IntType(false, info.bits), key);
if (info.bits <= HashInt.bit_count) {
return HashInt(unsigned_x) *% comptime rng.scalar(HashInt);
return HashInt(unsigned_x) ^ comptime rng.scalar(HashInt);
} else {
return @truncate(HashInt, unsigned_x *% comptime rng.scalar(@typeOf(unsigned_x)));
return @truncate(HashInt, unsigned_x ^ comptime rng.scalar(@typeOf(unsigned_x)));
}
},