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f26dda2117
Most of this migration was performed automatically with `zig fmt`. There were a few exceptions which I had to manually fix: * `@alignCast` and `@addrSpaceCast` cannot be automatically rewritten * `@truncate`'s fixup is incorrect for vectors * Test cases are not formatted, and their error locations change
36 lines
1 KiB
Zig
36 lines
1 KiB
Zig
const std = @import("std");
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const parity = @import("parity.zig");
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const testing = std.testing;
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fn paritydi2Naive(a: i64) i32 {
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var x = @as(u64, @bitCast(a));
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var has_parity: bool = false;
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while (x > 0) {
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has_parity = !has_parity;
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x = x & (x - 1);
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}
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return @as(i32, @intCast(@intFromBool(has_parity)));
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}
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fn test__paritydi2(a: i64) !void {
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var x = parity.__paritydi2(a);
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var expected: i64 = paritydi2Naive(a);
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try testing.expectEqual(expected, x);
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}
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test "paritydi2" {
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try test__paritydi2(0);
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try test__paritydi2(1);
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try test__paritydi2(2);
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try test__paritydi2(@as(i64, @bitCast(@as(u64, 0xffffffff_fffffffd))));
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try test__paritydi2(@as(i64, @bitCast(@as(u64, 0xffffffff_fffffffe))));
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try test__paritydi2(@as(i64, @bitCast(@as(u64, 0xffffffff_ffffffff))));
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const RndGen = std.rand.DefaultPrng;
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var rnd = RndGen.init(42);
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var i: u32 = 0;
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while (i < 10_000) : (i += 1) {
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var rand_num = rnd.random().int(i64);
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try test__paritydi2(rand_num);
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}
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}
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