2019-02-09 07:18:47 +08:00
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const expect = @import("std").testing.expect;
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2019-01-30 10:47:26 +08:00
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test "@popCount" {
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2021-05-05 02:23:22 +08:00
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comptime try testPopCount();
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try testPopCount();
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2019-01-30 10:47:26 +08:00
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}
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2021-05-05 02:23:22 +08:00
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fn testPopCount() !void {
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2019-04-03 22:00:39 +08:00
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{
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var x: u32 = 0xffffffff;
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2021-05-05 02:23:22 +08:00
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try expect(@popCount(u32, x) == 32);
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2019-04-03 22:00:39 +08:00
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}
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{
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var x: u5 = 0x1f;
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2021-05-05 02:23:22 +08:00
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try expect(@popCount(u5, x) == 5);
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2019-04-03 22:00:39 +08:00
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}
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2019-01-30 10:47:26 +08:00
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{
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var x: u32 = 0xaa;
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2021-05-05 02:23:22 +08:00
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try expect(@popCount(u32, x) == 4);
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2019-01-30 10:47:26 +08:00
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}
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{
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var x: u32 = 0xaaaaaaaa;
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2021-05-05 02:23:22 +08:00
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try expect(@popCount(u32, x) == 16);
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2019-04-03 22:00:39 +08:00
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}
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{
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var x: u32 = 0xaaaaaaaa;
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2021-05-05 02:23:22 +08:00
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try expect(@popCount(u32, x) == 16);
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2019-01-30 10:47:26 +08:00
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}
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{
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var x: i16 = -1;
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2021-05-05 02:23:22 +08:00
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try expect(@popCount(i16, x) == 16);
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2019-04-03 22:00:39 +08:00
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}
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{
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var x: i8 = -120;
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2021-05-05 02:23:22 +08:00
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try expect(@popCount(i8, x) == 2);
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2019-04-03 22:00:39 +08:00
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}
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comptime {
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2021-05-05 02:23:22 +08:00
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try expect(@popCount(u8, @bitCast(u8, @as(i8, -120))) == 2);
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2019-01-30 10:47:26 +08:00
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}
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comptime {
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2021-05-05 02:23:22 +08:00
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try expect(@popCount(i128, 0b11111111000110001100010000100001000011000011100101010001) == 24);
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2019-01-30 10:47:26 +08:00
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}
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}
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