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29 lines
1.2 KiB
Zig
29 lines
1.2 KiB
Zig
const builtin = @import("builtin");
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const std = @import("std");
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const expect = std.testing.expect;
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const math = std.math;
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fn ctz(x: anytype) usize {
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return @ctz(x);
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}
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test "fixed" {
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if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
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if (builtin.zig_backend == .stage2_x86_64 and
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!comptime std.Target.x86.featureSetHas(builtin.cpu.features, .bmi)) return error.SkipZigTest; // TODO
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if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
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if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
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if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
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if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;
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try testCtz();
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try comptime testCtz();
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}
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fn testCtz() !void {
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try expect(ctz(@as(u128, 0x40000000000000000000000000000000)) == 126);
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try expect(math.rotl(u128, @as(u128, 0x40000000000000000000000000000000), @as(u8, 1)) == @as(u128, 0x80000000000000000000000000000000));
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try expect(ctz(@as(u128, 0x80000000000000000000000000000000)) == 127);
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try expect(ctz(math.rotl(u128, @as(u128, 0x40000000000000000000000000000000), @as(u8, 1))) == 127);
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}
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