tiny.simd.MaskedMoremur

1pub fn MaskedMoremur(comptime bits: usize) type {2    validateBits(u64, bits);3    return struct {4        key_value: u64 = 0,56        const Self = @This();7        pub const Lane: type = u64;8        pub const mask: u64 = maskValue(u64, bits);910        pub fn init() Self {11            return .{};12        }1314        pub fn initKey(key_value: u64) Self {15            assertMasked(u64, bits, key_value);16            return .{ .key_value = key_value };17        }1819        pub fn initSeed(engine: *const random.AesCtrEngine, seed: u64) Self {20            return .{ .key_value = maybeMask(u64, bits, engine.generate(seed, 0)) };21        }2223        pub fn key(self: Self) u64 {24            return self.key_value;25        }2627        pub fn hash(self: Self, input: u64) u64 {28            assertMasked(u64, bits, input);29            var result = input ^ self.key_value;30            result ^= result >> 27;31            result *%= 0x3c79_ac49_2ba7_b653;32            result = maybeMask(u64, bits, result);33            result ^= result >> 33;34            result *%= 0x1c69_b3f7_4ac4_ae35;35            result = maybeMask(u64, bits, result);36            result ^= result >> 27;37            assertMasked(u64, bits, result);38            return result;39        }4041        pub fn oneVec(self: Self, comptime D: type, input: D.Vector) D.Vector {42            requireTag(D, u64);43            assertMaskedVector(D, bits, input);44            var result = input ^ @as(D.Vector, @splat(self.key_value));45            result ^= shift.shiftRight(D, 27, result);46            result = arithmetic.mul(D, result, @splat(0x3c79_ac49_2ba7_b653));47            result = maybeMaskVector(D, bits, result);48            result ^= shift.shiftRight(D, 33, result);49            result = arithmetic.mul(D, result, @splat(0x1c69_b3f7_4ac4_ae35));50            result = maybeMaskVector(D, bits, result);51            result ^= shift.shiftRight(D, 27, result);52            assertMaskedVector(D, bits, result);53            return result;54        }5556        pub fn twoVec(self: Self, comptime D: type, first: *D.Vector, second: *D.Vector) void {57            first.* = self.oneVec(D, first.*);58            second.* = self.oneVec(D, second.*);59        }60    };61}

1pub const MaskedMoremur = hash.MaskedMoremur;