const std = @import("std");
const builtin = @import("builtin");
const mem = std.mem;
const math = std.math;
const assert = std.debug.assert;
const expect = std.testing.expect;
const expectEqual = std.testing.expectEqual;

test "implicit cast vector to array - bool" {
    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;

    const S = struct {
        fn doTheTest() !void {
            const a: @Vector(4, bool) = [_]bool{ true, false, true, false };
            const result_array: [4]bool = a;
            try expect(mem.eql(bool, &result_array, &[4]bool{ true, false, true, false }));
        }
    };
    try S.doTheTest();
    try comptime S.doTheTest();
}

test "vector wrap operators" {
    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_x86_64 and
        !comptime std.Target.x86.featureSetHas(builtin.cpu.features, .sse4_1)) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;

    const S = struct {
        fn doTheTest() !void {
            var v: @Vector(4, i32) = [4]i32{ 2147483647, -2, 30, 40 };
            var x: @Vector(4, i32) = [4]i32{ 1, 2147483647, 3, 4 };
            try expect(mem.eql(i32, &@as([4]i32, v +% x), &[4]i32{ -2147483648, 2147483645, 33, 44 }));
            try expect(mem.eql(i32, &@as([4]i32, v -% x), &[4]i32{ 2147483646, 2147483647, 27, 36 }));
            try expect(mem.eql(i32, &@as([4]i32, v *% x), &[4]i32{ 2147483647, 2, 90, 160 }));
            var z: @Vector(4, i32) = [4]i32{ 1, 2, 3, -2147483648 };
            try expect(mem.eql(i32, &@as([4]i32, -%z), &[4]i32{ -1, -2, -3, -2147483648 }));
        }
    };
    try S.doTheTest();
    try comptime S.doTheTest();
}

test "vector bin compares with mem.eql" {
    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;

    const S = struct {
        fn doTheTest() !void {
            var v: @Vector(4, i32) = [4]i32{ 2147483647, -2, 30, 40 };
            var x: @Vector(4, i32) = [4]i32{ 1, 2147483647, 30, 4 };
            try expect(mem.eql(bool, &@as([4]bool, v == x), &[4]bool{ false, false, true, false }));
            try expect(mem.eql(bool, &@as([4]bool, v != x), &[4]bool{ true, true, false, true }));
            try expect(mem.eql(bool, &@as([4]bool, v < x), &[4]bool{ false, true, false, false }));
            try expect(mem.eql(bool, &@as([4]bool, v > x), &[4]bool{ true, false, false, true }));
            try expect(mem.eql(bool, &@as([4]bool, v <= x), &[4]bool{ false, true, true, false }));
            try expect(mem.eql(bool, &@as([4]bool, v >= x), &[4]bool{ true, false, true, true }));
        }
    };
    try S.doTheTest();
    try comptime S.doTheTest();
}

test "vector int operators" {
    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;

    const S = struct {
        fn doTheTest() !void {
            var v: @Vector(4, i32) = [4]i32{ 10, 20, 30, 40 };
            var x: @Vector(4, i32) = [4]i32{ 1, 2, 3, 4 };
            try expect(mem.eql(i32, &@as([4]i32, v + x), &[4]i32{ 11, 22, 33, 44 }));
            try expect(mem.eql(i32, &@as([4]i32, v - x), &[4]i32{ 9, 18, 27, 36 }));
            try expect(mem.eql(i32, &@as([4]i32, v * x), &[4]i32{ 10, 40, 90, 160 }));
            try expect(mem.eql(i32, &@as([4]i32, -v), &[4]i32{ -10, -20, -30, -40 }));
        }
    };
    try S.doTheTest();
    try comptime S.doTheTest();
}

test "vector float operators" {
    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;
    if (builtin.zig_backend == .stage2_c and comptime builtin.cpu.arch.isArmOrThumb()) return error.SkipZigTest;

    inline for ([_]type{ f16, f32, f64, f80, f128 }) |T| {
        const S = struct {
            fn doTheTest() !void {
                var v: @Vector(4, T) = [4]T{ 10, 20, 30, 40 };
                var x: @Vector(4, T) = [4]T{ 1, 2, 3, 4 };
                try expect(mem.eql(T, &@as([4]T, v + x), &[4]T{ 11, 22, 33, 44 }));
                try expect(mem.eql(T, &@as([4]T, v - x), &[4]T{ 9, 18, 27, 36 }));
                try expect(mem.eql(T, &@as([4]T, v * x), &[4]T{ 10, 40, 90, 160 }));
                try expect(mem.eql(T, &@as([4]T, -x), &[4]T{ -1, -2, -3, -4 }));
            }
        };
        try S.doTheTest();
        try comptime S.doTheTest();
    }
}

test "vector bit operators" {
    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;

    const S = struct {
        fn doTheTest() !void {
            var v: @Vector(4, u8) = [4]u8{ 0b10101010, 0b10101010, 0b10101010, 0b10101010 };
            var x: @Vector(4, u8) = [4]u8{ 0b11110000, 0b00001111, 0b10101010, 0b01010101 };
            try expect(mem.eql(u8, &@as([4]u8, v ^ x), &[4]u8{ 0b01011010, 0b10100101, 0b00000000, 0b11111111 }));
            try expect(mem.eql(u8, &@as([4]u8, v | x), &[4]u8{ 0b11111010, 0b10101111, 0b10101010, 0b11111111 }));
            try expect(mem.eql(u8, &@as([4]u8, v & x), &[4]u8{ 0b10100000, 0b00001010, 0b10101010, 0b00000000 }));
        }
    };
    try S.doTheTest();
    try comptime S.doTheTest();
}

test "implicit cast vector to array" {
    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;

    const S = struct {
        fn doTheTest() !void {
            var a: @Vector(4, i32) = [_]i32{ 1, 2, 3, 4 };
            var result_array: [4]i32 = a;
            result_array = a;
            try expect(mem.eql(i32, &result_array, &[4]i32{ 1, 2, 3, 4 }));
        }
    };
    try S.doTheTest();
    try comptime S.doTheTest();
}

test "array to vector" {
    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;

    const S = struct {
        fn doTheTest() !void {
            var foo: f32 = 3.14;
            var arr = [4]f32{ foo, 1.5, 0.0, 0.0 };
            var vec: @Vector(4, f32) = arr;
            try expect(mem.eql(f32, &@as([4]f32, vec), &arr));
        }
    };
    try S.doTheTest();
    try comptime S.doTheTest();
}

test "array vector coercion - odd sizes" {
    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;
    if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest;
    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest;

    const S = struct {
        fn doTheTest() !void {
            var foo1: i48 = 124578;
            var vec1: @Vector(2, i48) = [2]i48{ foo1, 1 };
            var arr1: [2]i48 = vec1;
            try expect(vec1[0] == foo1 and vec1[1] == 1);
            try expect(arr1[0] == foo1 and arr1[1] == 1);

            var foo2: u4 = 5;
            var vec2: @Vector(2, u4) = [2]u4{ foo2, 1 };
            var arr2: [2]u4 = vec2;
            try expect(vec2[0] == foo2 and vec2[1] == 1);
            try expect(arr2[0] == foo2 and arr2[1] == 1);

            var foo3: u13 = 13;
            var vec3: @Vector(3, u13) = [3]u13{ foo3, 0, 1 };
            var arr3: [3]u13 = vec3;
            try expect(vec3[0] == foo3 and vec3[1] == 0 and vec3[2] == 1);
            try expect(arr3[0] == foo3 and arr3[1] == 0 and arr3[2] == 1);

            var arr4 = [4:0]u24{ foo3, foo2, 0, 1 };
            var vec4: @Vector(4, u24) = arr4;
            try expect(vec4[0] == foo3 and vec4[1] == foo2 and vec4[2] == 0 and vec4[3] == 1);
        }
    };
    try S.doTheTest();
    try comptime S.doTheTest();
}

test "array to vector with element type coercion" {
    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_x86_64 and
        !comptime std.Target.x86.featureSetHas(builtin.cpu.features, .f16c)) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;

    const S = struct {
        fn doTheTest() !void {
            var foo: f16 = 3.14;
            var arr32 = [4]f32{ foo, 1.5, 0.0, 0.0 };
            var vec: @Vector(4, f32) = [4]f16{ foo, 1.5, 0.0, 0.0 };
            try std.testing.expect(std.mem.eql(f32, &@as([4]f32, vec), &arr32));
        }
    };
    try S.doTheTest();
    try comptime S.doTheTest();
}

test "peer type resolution with coercible element types" {
    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;

    const S = struct {
        fn doTheTest() !void {
            var b: @Vector(2, u8) = .{ 1, 2 };
            var a: @Vector(2, u16) = .{ 2, 1 };
            var t: bool = true;
            var c = if (t) a else b;
            try std.testing.expect(@TypeOf(c) == @Vector(2, u16));
        }
    };
    try comptime S.doTheTest();
}

test "tuple to vector" {
    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;

    if (builtin.zig_backend == .stage2_llvm and builtin.cpu.arch == .aarch64) {
        // Regressed with LLVM 14:
        // https://github.com/ziglang/zig/issues/12012
        return error.SkipZigTest;
    }

    const S = struct {
        fn doTheTest() !void {
            const Vec3 = @Vector(3, i32);
            var v: Vec3 = .{ 1, 0, 0 };
            for ([_]Vec3{ .{ 0, 1, 0 }, .{ 0, 0, 1 } }) |it| {
                v += it;
            }

            try std.testing.expectEqual(v, Vec3{ 1, 1, 1 });
            try std.testing.expectEqual(v, .{ 1, 1, 1 });
        }
    };
    try S.doTheTest();
    try comptime S.doTheTest();
}

test "vector casts of sizes not divisible by 8" {
    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;

    const S = struct {
        fn doTheTest() !void {
            {
                var v: @Vector(4, u3) = [4]u3{ 5, 2, 3, 0 };
                var x: [4]u3 = v;
                try expect(mem.eql(u3, &x, &@as([4]u3, v)));
            }
            {
                var v: @Vector(4, u2) = [4]u2{ 1, 2, 3, 0 };
                var x: [4]u2 = v;
                try expect(mem.eql(u2, &x, &@as([4]u2, v)));
            }
            {
                var v: @Vector(4, u1) = [4]u1{ 1, 0, 1, 0 };
                var x: [4]u1 = v;
                try expect(mem.eql(u1, &x, &@as([4]u1, v)));
            }
            {
                var v: @Vector(4, bool) = [4]bool{ false, false, true, false };
                var x: [4]bool = v;
                try expect(mem.eql(bool, &x, &@as([4]bool, v)));
            }
        }
    };
    try S.doTheTest();
    try comptime S.doTheTest();
}

test "vector @splat" {
    if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;

    if (builtin.zig_backend == .stage2_llvm and
        builtin.os.tag == .macos)
    {
        // LLVM 15 regression: https://github.com/ziglang/zig/issues/12827
        return error.SkipZigTest;
    }

    const S = struct {
        fn testForT(comptime N: comptime_int, v: anytype) !void {
            const T = @TypeOf(v);
            var vec: @Vector(N, T) = @splat(v);
            var as_array = @as([N]T, vec);
            for (as_array) |elem| try expect(v == elem);
        }
        fn doTheTest() !void {
            // Splats with multiple-of-8 bit types that fill a 128bit vector.
            try testForT(16, @as(u8, 0xEE));
            try testForT(8, @as(u16, 0xBEEF));
            try testForT(4, @as(u32, 0xDEADBEEF));
            try testForT(2, @as(u64, 0xCAFEF00DDEADBEEF));

            try testForT(8, @as(f16, 3.1415));
            try testForT(4, @as(f32, 3.1415));
            try testForT(2, @as(f64, 3.1415));

            // Same but fill more than 128 bits.
            try testForT(16 * 2, @as(u8, 0xEE));
            try testForT(8 * 2, @as(u16, 0xBEEF));
            try testForT(4 * 2, @as(u32, 0xDEADBEEF));
            try testForT(2 * 2, @as(u64, 0xCAFEF00DDEADBEEF));

            try testForT(8 * 2, @as(f16, 3.1415));
            try testForT(4 * 2, @as(f32, 3.1415));
            try testForT(2 * 2, @as(f64, 3.1415));
        }
    };
    try S.doTheTest();
    try comptime S.doTheTest();
}

test "load vector elements via comptime index" {
    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;

    const S = struct {
        fn doTheTest() !void {
            var v: @Vector(4, i32) = [_]i32{ 1, 2, 3, undefined };
            try expect(v[0] == 1);
            try expect(v[1] == 2);
            try expect(loadv(&v[2]) == 3);
        }
        fn loadv(ptr: anytype) i32 {
            return ptr.*;
        }
    };

    try S.doTheTest();
    try comptime S.doTheTest();
}

test "store vector elements via comptime index" {
    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;

    const S = struct {
        fn doTheTest() !void {
            var v: @Vector(4, i32) = [_]i32{ 1, 5, 3, undefined };

            v[2] = 42;
            try expect(v[1] == 5);
            v[3] = -364;
            try expect(v[2] == 42);
            try expect(-364 == v[3]);

            storev(&v[0], 100);
            try expect(v[0] == 100);
        }
        fn storev(ptr: anytype, x: i32) void {
            ptr.* = x;
        }
    };

    try S.doTheTest();
    try comptime S.doTheTest();
}

test "load vector elements via runtime index" {
    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;

    const S = struct {
        fn doTheTest() !void {
            var v: @Vector(4, i32) = [_]i32{ 1, 2, 3, undefined };
            var i: u32 = 0;
            try expect(v[i] == 1);
            i += 1;
            try expect(v[i] == 2);
            i += 1;
            try expect(v[i] == 3);
        }
    };

    try S.doTheTest();
    try comptime S.doTheTest();
}

test "store vector elements via runtime index" {
    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;

    const S = struct {
        fn doTheTest() !void {
            var v: @Vector(4, i32) = [_]i32{ 1, 5, 3, undefined };
            var i: u32 = 2;
            v[i] = 1;
            try expect(v[1] == 5);
            try expect(v[2] == 1);
            i += 1;
            v[i] = -364;
            try expect(-364 == v[3]);
        }
    };

    try S.doTheTest();
    try comptime S.doTheTest();
}

test "initialize vector which is a struct field" {
    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;

    const Vec4Obj = struct {
        data: @Vector(4, f32),
    };

    const S = struct {
        fn doTheTest() !void {
            var foo = Vec4Obj{
                .data = [_]f32{ 1, 2, 3, 4 },
            };
            _ = foo;
        }
    };
    try S.doTheTest();
    try comptime S.doTheTest();
}

test "vector comparison operators" {
    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;

    const S = struct {
        fn doTheTest() !void {
            {
                const V = @Vector(4, bool);
                var v1: V = [_]bool{ true, false, true, false };
                var v2: V = [_]bool{ false, true, false, true };
                try expect(mem.eql(bool, &@as([4]bool, @as(V, @splat(true))), &@as([4]bool, v1 == v1)));
                try expect(mem.eql(bool, &@as([4]bool, @as(V, @splat(false))), &@as([4]bool, v1 == v2)));
                try expect(mem.eql(bool, &@as([4]bool, @as(V, @splat(true))), &@as([4]bool, v1 != v2)));
                try expect(mem.eql(bool, &@as([4]bool, @as(V, @splat(false))), &@as([4]bool, v2 != v2)));
            }
            {
                const V = @Vector(4, bool);
                var v1: @Vector(4, u32) = @splat(0xc0ffeeee);
                var v2: @Vector(4, c_uint) = v1;
                var v3: @Vector(4, u32) = @splat(0xdeadbeef);
                try expect(mem.eql(bool, &@as([4]bool, @as(V, @splat(true))), &@as([4]bool, v1 == v2)));
                try expect(mem.eql(bool, &@as([4]bool, @as(V, @splat(false))), &@as([4]bool, v1 == v3)));
                try expect(mem.eql(bool, &@as([4]bool, @as(V, @splat(true))), &@as([4]bool, v1 != v3)));
                try expect(mem.eql(bool, &@as([4]bool, @as(V, @splat(false))), &@as([4]bool, v1 != v2)));
            }
            {
                // Comptime-known LHS/RHS
                var v1: @Vector(4, u32) = [_]u32{ 2, 1, 2, 1 };
                const v2: @Vector(4, u32) = @splat(2);
                const v3: @Vector(4, bool) = [_]bool{ true, false, true, false };
                try expect(mem.eql(bool, &@as([4]bool, v3), &@as([4]bool, v1 == v2)));
                try expect(mem.eql(bool, &@as([4]bool, v3), &@as([4]bool, v2 == v1)));
            }
        }
    };
    try S.doTheTest();
    try comptime S.doTheTest();
}

test "vector division operators" {
    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_llvm and comptime builtin.cpu.arch.isArmOrThumb()) return error.SkipZigTest;
    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;

    const S = struct {
        fn doTheTestDiv(comptime T: type, x: @Vector(4, T), y: @Vector(4, T)) !void {
            if (!comptime std.meta.trait.isSignedInt(T)) {
                const d0 = x / y;
                for (@as([4]T, d0), 0..) |v, i| {
                    try expect(x[i] / y[i] == v);
                }
            }
            const d1 = @divExact(x, y);
            for (@as([4]T, d1), 0..) |v, i| {
                try expect(@divExact(x[i], y[i]) == v);
            }
            const d2 = @divFloor(x, y);
            for (@as([4]T, d2), 0..) |v, i| {
                try expect(@divFloor(x[i], y[i]) == v);
            }
            const d3 = @divTrunc(x, y);
            for (@as([4]T, d3), 0..) |v, i| {
                try expect(@divTrunc(x[i], y[i]) == v);
            }
        }

        fn doTheTestMod(comptime T: type, x: @Vector(4, T), y: @Vector(4, T)) !void {
            if ((!comptime std.meta.trait.isSignedInt(T)) and @typeInfo(T) != .Float) {
                const r0 = x % y;
                for (@as([4]T, r0), 0..) |v, i| {
                    try expect(x[i] % y[i] == v);
                }
            }
            const r1 = @mod(x, y);
            for (@as([4]T, r1), 0..) |v, i| {
                try expect(@mod(x[i], y[i]) == v);
            }
            const r2 = @rem(x, y);
            for (@as([4]T, r2), 0..) |v, i| {
                try expect(@rem(x[i], y[i]) == v);
            }
        }

        fn doTheTest() !void {
            try doTheTestDiv(f16, [4]f16{ 4.0, -4.0, 4.0, -4.0 }, [4]f16{ 1.0, 2.0, -1.0, -2.0 });

            try doTheTestDiv(f32, [4]f32{ 4.0, -4.0, 4.0, -4.0 }, [4]f32{ 1.0, 2.0, -1.0, -2.0 });
            try doTheTestDiv(f64, [4]f64{ 4.0, -4.0, 4.0, -4.0 }, [4]f64{ 1.0, 2.0, -1.0, -2.0 });

            try doTheTestMod(f16, [4]f16{ 4.0, -4.0, 4.0, -4.0 }, [4]f16{ 1.0, 2.0, 0.5, 3.0 });
            try doTheTestMod(f32, [4]f32{ 4.0, -4.0, 4.0, -4.0 }, [4]f32{ 1.0, 2.0, 0.5, 3.0 });
            try doTheTestMod(f64, [4]f64{ 4.0, -4.0, 4.0, -4.0 }, [4]f64{ 1.0, 2.0, 0.5, 3.0 });

            try doTheTestDiv(i8, [4]i8{ 4, -4, 4, -4 }, [4]i8{ 1, 2, -1, -2 });
            try doTheTestDiv(i16, [4]i16{ 4, -4, 4, -4 }, [4]i16{ 1, 2, -1, -2 });
            try doTheTestDiv(i32, [4]i32{ 4, -4, 4, -4 }, [4]i32{ 1, 2, -1, -2 });
            try doTheTestDiv(i64, [4]i64{ 4, -4, 4, -4 }, [4]i64{ 1, 2, -1, -2 });

            try doTheTestMod(i8, [4]i8{ 4, -4, 4, -4 }, [4]i8{ 1, 2, 4, 8 });
            try doTheTestMod(i16, [4]i16{ 4, -4, 4, -4 }, [4]i16{ 1, 2, 4, 8 });
            try doTheTestMod(i32, [4]i32{ 4, -4, 4, -4 }, [4]i32{ 1, 2, 4, 8 });
            try doTheTestMod(i64, [4]i64{ 4, -4, 4, -4 }, [4]i64{ 1, 2, 4, 8 });

            try doTheTestDiv(u8, [4]u8{ 1, 2, 4, 8 }, [4]u8{ 1, 1, 2, 4 });
            try doTheTestDiv(u16, [4]u16{ 1, 2, 4, 8 }, [4]u16{ 1, 1, 2, 4 });
            try doTheTestDiv(u32, [4]u32{ 1, 2, 4, 8 }, [4]u32{ 1, 1, 2, 4 });
            try doTheTestDiv(u64, [4]u64{ 1, 2, 4, 8 }, [4]u64{ 1, 1, 2, 4 });

            try doTheTestMod(u8, [4]u8{ 1, 2, 4, 8 }, [4]u8{ 1, 1, 2, 4 });
            try doTheTestMod(u16, [4]u16{ 1, 2, 4, 8 }, [4]u16{ 1, 1, 2, 4 });
            try doTheTestMod(u32, [4]u32{ 1, 2, 4, 8 }, [4]u32{ 1, 1, 2, 4 });
            try doTheTestMod(u64, [4]u64{ 1, 2, 4, 8 }, [4]u64{ 1, 1, 2, 4 });
        }
    };

    try S.doTheTest();
    try comptime S.doTheTest();
}

test "vector bitwise not operator" {
    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;

    const S = struct {
        fn doTheTestNot(comptime T: type, x: @Vector(4, T)) !void {
            var y = ~x;
            for (@as([4]T, y), 0..) |v, i| {
                try expect(~x[i] == v);
            }
        }
        fn doTheTest() !void {
            try doTheTestNot(u8, [_]u8{ 0, 2, 4, 255 });
            try doTheTestNot(u16, [_]u16{ 0, 2, 4, 255 });
            try doTheTestNot(u32, [_]u32{ 0, 2, 4, 255 });
            try doTheTestNot(u64, [_]u64{ 0, 2, 4, 255 });

            try doTheTestNot(u8, [_]u8{ 0, 2, 4, 255 });
            try doTheTestNot(u16, [_]u16{ 0, 2, 4, 255 });
            try doTheTestNot(u32, [_]u32{ 0, 2, 4, 255 });
            try doTheTestNot(u64, [_]u64{ 0, 2, 4, 255 });
        }
    };

    try S.doTheTest();
    try comptime S.doTheTest();
}

test "vector shift operators" {
    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;

    const S = struct {
        fn doTheTestShift(x: anytype, y: anytype) !void {
            const N = @typeInfo(@TypeOf(x)).Array.len;
            const TX = @typeInfo(@TypeOf(x)).Array.child;
            const TY = @typeInfo(@TypeOf(y)).Array.child;

            var xv = @as(@Vector(N, TX), x);
            var yv = @as(@Vector(N, TY), y);

            var z0 = xv >> yv;
            for (@as([N]TX, z0), 0..) |v, i| {
                try expect(x[i] >> y[i] == v);
            }
            var z1 = xv << yv;
            for (@as([N]TX, z1), 0..) |v, i| {
                try expect(x[i] << y[i] == v);
            }
        }
        fn doTheTestShiftExact(x: anytype, y: anytype, dir: enum { Left, Right }) !void {
            const N = @typeInfo(@TypeOf(x)).Array.len;
            const TX = @typeInfo(@TypeOf(x)).Array.child;
            const TY = @typeInfo(@TypeOf(y)).Array.child;

            var xv = @as(@Vector(N, TX), x);
            var yv = @as(@Vector(N, TY), y);

            var z = if (dir == .Left) @shlExact(xv, yv) else @shrExact(xv, yv);
            for (@as([N]TX, z), 0..) |v, i| {
                const check = if (dir == .Left) x[i] << y[i] else x[i] >> y[i];
                try expect(check == v);
            }
        }
        fn doTheTest() !void {
            try doTheTestShift([_]u8{ 0, 2, 4, math.maxInt(u8) }, [_]u3{ 2, 0, 2, 7 });
            try doTheTestShift([_]u16{ 0, 2, 4, math.maxInt(u16) }, [_]u4{ 2, 0, 2, 15 });
            try doTheTestShift([_]u24{ 0, 2, 4, math.maxInt(u24) }, [_]u5{ 2, 0, 2, 23 });
            try doTheTestShift([_]u32{ 0, 2, 4, math.maxInt(u32) }, [_]u5{ 2, 0, 2, 31 });
            try doTheTestShift([_]u64{ 0xfe, math.maxInt(u64) }, [_]u6{ 0, 63 });

            try doTheTestShift([_]i8{ 0, 2, 4, math.maxInt(i8) }, [_]u3{ 2, 0, 2, 7 });
            try doTheTestShift([_]i16{ 0, 2, 4, math.maxInt(i16) }, [_]u4{ 2, 0, 2, 7 });
            try doTheTestShift([_]i24{ 0, 2, 4, math.maxInt(i24) }, [_]u5{ 2, 0, 2, 7 });
            try doTheTestShift([_]i32{ 0, 2, 4, math.maxInt(i32) }, [_]u5{ 2, 0, 2, 7 });
            try doTheTestShift([_]i64{ 0xfe, math.maxInt(i64) }, [_]u6{ 0, 63 });

            try doTheTestShiftExact([_]u8{ 0, 1, 1 << 7, math.maxInt(u8) ^ 1 }, [_]u3{ 4, 0, 7, 1 }, .Right);
            try doTheTestShiftExact([_]u16{ 0, 1, 1 << 15, math.maxInt(u16) ^ 1 }, [_]u4{ 4, 0, 15, 1 }, .Right);
            try doTheTestShiftExact([_]u24{ 0, 1, 1 << 23, math.maxInt(u24) ^ 1 }, [_]u5{ 4, 0, 23, 1 }, .Right);
            try doTheTestShiftExact([_]u32{ 0, 1, 1 << 31, math.maxInt(u32) ^ 1 }, [_]u5{ 4, 0, 31, 1 }, .Right);
            try doTheTestShiftExact([_]u64{ 1 << 63, 1 }, [_]u6{ 63, 0 }, .Right);

            try doTheTestShiftExact([_]u8{ 0, 1, 1, math.maxInt(u8) ^ (1 << 7) }, [_]u3{ 4, 0, 7, 1 }, .Left);
            try doTheTestShiftExact([_]u16{ 0, 1, 1, math.maxInt(u16) ^ (1 << 15) }, [_]u4{ 4, 0, 15, 1 }, .Left);
            try doTheTestShiftExact([_]u24{ 0, 1, 1, math.maxInt(u24) ^ (1 << 23) }, [_]u5{ 4, 0, 23, 1 }, .Left);
            try doTheTestShiftExact([_]u32{ 0, 1, 1, math.maxInt(u32) ^ (1 << 31) }, [_]u5{ 4, 0, 31, 1 }, .Left);
            try doTheTestShiftExact([_]u64{ 1 << 63, 1 }, [_]u6{ 0, 63 }, .Left);
        }
    };

    switch (builtin.target.cpu.arch) {
        .x86,
        .aarch64,
        .aarch64_be,
        .aarch64_32,
        .arm,
        .armeb,
        .thumb,
        .thumbeb,
        .mips,
        .mipsel,
        .mips64,
        .mips64el,
        .riscv64,
        .sparc64,
        => {
            // LLVM miscompiles on this architecture
            // https://github.com/ziglang/zig/issues/4951
            return error.SkipZigTest;
        },
        else => {},
    }

    try S.doTheTest();
    try comptime S.doTheTest();
}

test "vector reduce operation" {
    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;
    if (builtin.zig_backend == .stage2_c and comptime builtin.cpu.arch.isArmOrThumb()) return error.SkipZigTest;

    const S = struct {
        fn testReduce(comptime op: std.builtin.ReduceOp, x: anytype, expected: anytype) !void {
            const N = @typeInfo(@TypeOf(x)).Array.len;
            const TX = @typeInfo(@TypeOf(x)).Array.child;

            var r = @reduce(op, @as(@Vector(N, TX), x));
            switch (@typeInfo(TX)) {
                .Int, .Bool => try expect(expected == r),
                .Float => {
                    const expected_nan = math.isNan(expected);
                    const got_nan = math.isNan(r);

                    if (expected_nan and got_nan) {
                        // Do this check explicitly as two NaN values are never
                        // equal.
                    } else {
                        const F = @TypeOf(expected);
                        const tolerance = @sqrt(math.floatEps(TX));
                        try expect(std.math.approxEqRel(F, expected, r, tolerance));
                    }
                },
                else => unreachable,
            }
        }
        fn doTheTest() !void {
            try testReduce(.Add, [4]i16{ -9, -99, -999, -9999 }, @as(i32, -11106));
            try testReduce(.Add, [4]u16{ 9, 99, 999, 9999 }, @as(u32, 11106));
            try testReduce(.Add, [4]i32{ -9, -99, -999, -9999 }, @as(i32, -11106));
            try testReduce(.Add, [4]u32{ 9, 99, 999, 9999 }, @as(u32, 11106));
            try testReduce(.Add, [4]i64{ -9, -99, -999, -9999 }, @as(i64, -11106));
            try testReduce(.Add, [4]u64{ 9, 99, 999, 9999 }, @as(u64, 11106));
            try testReduce(.Add, [4]i128{ -9, -99, -999, -9999 }, @as(i128, -11106));
            try testReduce(.Add, [4]u128{ 9, 99, 999, 9999 }, @as(u128, 11106));
            try testReduce(.Add, [4]f16{ -1.9, 5.1, -60.3, 100.0 }, @as(f16, 42.9));
            try testReduce(.Add, [4]f32{ -1.9, 5.1, -60.3, 100.0 }, @as(f32, 42.9));
            try testReduce(.Add, [4]f64{ -1.9, 5.1, -60.3, 100.0 }, @as(f64, 42.9));

            try testReduce(.And, [4]bool{ true, false, true, true }, @as(bool, false));
            try testReduce(.And, [4]u1{ 1, 0, 1, 1 }, @as(u1, 0));
            try testReduce(.And, [4]u16{ 0xffff, 0xff55, 0xaaff, 0x1010 }, @as(u16, 0x10));
            try testReduce(.And, [4]u32{ 0xffffffff, 0xffff5555, 0xaaaaffff, 0x10101010 }, @as(u32, 0x1010));
            try testReduce(.And, [4]u64{ 0xffffffff, 0xffff5555, 0xaaaaffff, 0x10101010 }, @as(u64, 0x1010));

            try testReduce(.Min, [4]i16{ -1, 2, 3, 4 }, @as(i16, -1));
            try testReduce(.Min, [4]u16{ 1, 2, 3, 4 }, @as(u16, 1));
            try testReduce(.Min, [4]i32{ 1234567, -386, 0, 3 }, @as(i32, -386));
            try testReduce(.Min, [4]u32{ 99, 9999, 9, 99999 }, @as(u32, 9));

            // LLVM 11 ERROR: Cannot select type
            // https://github.com/ziglang/zig/issues/7138
            if (builtin.zig_backend != .stage2_llvm or builtin.target.cpu.arch != .aarch64) {
                try testReduce(.Min, [4]i64{ 1234567, -386, 0, 3 }, @as(i64, -386));
                try testReduce(.Min, [4]u64{ 99, 9999, 9, 99999 }, @as(u64, 9));
            }

            try testReduce(.Min, [4]i128{ 1234567, -386, 0, 3 }, @as(i128, -386));
            try testReduce(.Min, [4]u128{ 99, 9999, 9, 99999 }, @as(u128, 9));
            try testReduce(.Min, [4]f16{ -10.3, 10.0e9, 13.0, -100.0 }, @as(f16, -100.0));
            try testReduce(.Min, [4]f32{ -10.3, 10.0e9, 13.0, -100.0 }, @as(f32, -100.0));
            try testReduce(.Min, [4]f64{ -10.3, 10.0e9, 13.0, -100.0 }, @as(f64, -100.0));

            try testReduce(.Max, [4]i16{ -1, 2, 3, 4 }, @as(i16, 4));
            try testReduce(.Max, [4]u16{ 1, 2, 3, 4 }, @as(u16, 4));
            try testReduce(.Max, [4]i32{ 1234567, -386, 0, 3 }, @as(i32, 1234567));
            try testReduce(.Max, [4]u32{ 99, 9999, 9, 99999 }, @as(u32, 99999));

            // LLVM 11 ERROR: Cannot select type
            // https://github.com/ziglang/zig/issues/7138
            if (builtin.zig_backend != .stage2_llvm or builtin.target.cpu.arch != .aarch64) {
                try testReduce(.Max, [4]i64{ 1234567, -386, 0, 3 }, @as(i64, 1234567));
                try testReduce(.Max, [4]u64{ 99, 9999, 9, 99999 }, @as(u64, 99999));
            }

            try testReduce(.Max, [4]i128{ 1234567, -386, 0, 3 }, @as(i128, 1234567));
            try testReduce(.Max, [4]u128{ 99, 9999, 9, 99999 }, @as(u128, 99999));
            try testReduce(.Max, [4]f16{ -10.3, 10.0e9, 13.0, -100.0 }, @as(f16, 10.0e9));
            try testReduce(.Max, [4]f32{ -10.3, 10.0e9, 13.0, -100.0 }, @as(f32, 10.0e9));
            try testReduce(.Max, [4]f64{ -10.3, 10.0e9, 13.0, -100.0 }, @as(f64, 10.0e9));

            try testReduce(.Mul, [4]i16{ -1, 2, 3, 4 }, @as(i16, -24));
            try testReduce(.Mul, [4]u16{ 1, 2, 3, 4 }, @as(u16, 24));
            try testReduce(.Mul, [4]i32{ -9, -99, -999, 999 }, @as(i32, -889218891));
            try testReduce(.Mul, [4]u32{ 1, 2, 3, 4 }, @as(u32, 24));
            try testReduce(.Mul, [4]i64{ 9, 99, 999, 9999 }, @as(i64, 8900199891));
            try testReduce(.Mul, [4]u64{ 9, 99, 999, 9999 }, @as(u64, 8900199891));
            try testReduce(.Mul, [4]i128{ -9, -99, -999, 9999 }, @as(i128, -8900199891));
            try testReduce(.Mul, [4]u128{ 9, 99, 999, 9999 }, @as(u128, 8900199891));
            try testReduce(.Mul, [4]f16{ -1.9, 5.1, -60.3, 100.0 }, @as(f16, 58430.7));
            try testReduce(.Mul, [4]f32{ -1.9, 5.1, -60.3, 100.0 }, @as(f32, 58430.7));
            try testReduce(.Mul, [4]f64{ -1.9, 5.1, -60.3, 100.0 }, @as(f64, 58430.7));

            try testReduce(.Or, [4]bool{ false, true, false, false }, @as(bool, true));
            try testReduce(.Or, [4]u1{ 0, 1, 0, 0 }, @as(u1, 1));
            try testReduce(.Or, [4]u16{ 0xff00, 0xff00, 0xf0, 0xf }, ~@as(u16, 0));
            try testReduce(.Or, [4]u32{ 0xffff0000, 0xff00, 0xf0, 0xf }, ~@as(u32, 0));
            try testReduce(.Or, [4]u64{ 0xffff0000, 0xff00, 0xf0, 0xf }, @as(u64, 0xffffffff));
            try testReduce(.Or, [4]u128{ 0xffff0000, 0xff00, 0xf0, 0xf }, @as(u128, 0xffffffff));

            try testReduce(.Xor, [4]bool{ true, true, true, false }, @as(bool, true));
            try testReduce(.Xor, [4]u1{ 1, 1, 1, 0 }, @as(u1, 1));
            try testReduce(.Xor, [4]u16{ 0x0000, 0x3333, 0x8888, 0x4444 }, ~@as(u16, 0));
            try testReduce(.Xor, [4]u32{ 0x00000000, 0x33333333, 0x88888888, 0x44444444 }, ~@as(u32, 0));
            try testReduce(.Xor, [4]u64{ 0x00000000, 0x33333333, 0x88888888, 0x44444444 }, @as(u64, 0xffffffff));
            try testReduce(.Xor, [4]u128{ 0x00000000, 0x33333333, 0x88888888, 0x44444444 }, @as(u128, 0xffffffff));

            // Test the reduction on vectors containing NaNs.
            const f16_nan = math.nan(f16);
            const f32_nan = math.nan(f32);
            const f64_nan = math.nan(f64);

            try testReduce(.Add, [4]f16{ -1.9, 5.1, f16_nan, 100.0 }, f16_nan);
            try testReduce(.Add, [4]f32{ -1.9, 5.1, f32_nan, 100.0 }, f32_nan);
            try testReduce(.Add, [4]f64{ -1.9, 5.1, f64_nan, 100.0 }, f64_nan);

            // LLVM 11 ERROR: Cannot select type
            // https://github.com/ziglang/zig/issues/7138
            if (builtin.zig_backend != .stage2_llvm) {
                try testReduce(.Min, [4]f16{ -1.9, 5.1, f16_nan, 100.0 }, @as(f16, -1.9));
                try testReduce(.Min, [4]f32{ -1.9, 5.1, f32_nan, 100.0 }, @as(f32, -1.9));
                try testReduce(.Min, [4]f64{ -1.9, 5.1, f64_nan, 100.0 }, @as(f64, -1.9));

                try testReduce(.Max, [4]f16{ -1.9, 5.1, f16_nan, 100.0 }, @as(f16, 100.0));
                try testReduce(.Max, [4]f32{ -1.9, 5.1, f32_nan, 100.0 }, @as(f32, 100.0));
                try testReduce(.Max, [4]f64{ -1.9, 5.1, f64_nan, 100.0 }, @as(f64, 100.0));
            }

            try testReduce(.Mul, [4]f16{ -1.9, 5.1, f16_nan, 100.0 }, f16_nan);
            try testReduce(.Mul, [4]f32{ -1.9, 5.1, f32_nan, 100.0 }, f32_nan);
            try testReduce(.Mul, [4]f64{ -1.9, 5.1, f64_nan, 100.0 }, f64_nan);
        }
    };

    try S.doTheTest();
    try comptime S.doTheTest();
}

test "vector @reduce comptime" {
    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO

    const V = @Vector(4, i32);

    const value = V{ 1, -1, 1, -1 };
    const result = value > @as(V, @splat(0));
    // result is { true, false, true, false };
    try comptime expect(@TypeOf(result) == @Vector(4, bool));
    const is_all_true = @reduce(.And, result);
    try comptime expect(@TypeOf(is_all_true) == bool);
    try expect(is_all_true == false);
}

test "mask parameter of @shuffle is comptime scope" {
    if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;

    const __v4hi = @Vector(4, i16);
    var v4_a = __v4hi{ 0, 0, 0, 0 };
    var v4_b = __v4hi{ 0, 0, 0, 0 };
    var shuffled: __v4hi = @shuffle(i16, v4_a, v4_b, @Vector(4, i32){
        std.zig.c_translation.shuffleVectorIndex(0, @typeInfo(@TypeOf(v4_a)).Vector.len),
        std.zig.c_translation.shuffleVectorIndex(0, @typeInfo(@TypeOf(v4_a)).Vector.len),
        std.zig.c_translation.shuffleVectorIndex(0, @typeInfo(@TypeOf(v4_a)).Vector.len),
        std.zig.c_translation.shuffleVectorIndex(0, @typeInfo(@TypeOf(v4_a)).Vector.len),
    });
    _ = shuffled;
}

test "saturating add" {
    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;

    const S = struct {
        fn doTheTest() !void {
            { // Broken out to avoid https://github.com/ziglang/zig/issues/11251
                const u8x3 = @Vector(3, u8);
                var lhs = u8x3{ 255, 254, 1 };
                var rhs = u8x3{ 1, 2, 255 };
                var result = lhs +| rhs;
                const expected = u8x3{ 255, 255, 255 };
                try expect(mem.eql(u8, &@as([3]u8, expected), &@as([3]u8, result)));
            }
            { // Broken out to avoid https://github.com/ziglang/zig/issues/11251
                const i8x3 = @Vector(3, i8);
                var lhs = i8x3{ 127, 126, 1 };
                var rhs = i8x3{ 1, 2, 127 };
                var result = lhs +| rhs;
                const expected = i8x3{ 127, 127, 127 };
                try expect(mem.eql(i8, &@as([3]i8, expected), &@as([3]i8, result)));
            }
        }
    };
    try S.doTheTest();
    try comptime S.doTheTest();
}

test "saturating subtraction" {
    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;

    const S = struct {
        fn doTheTest() !void {
            // Broken out to avoid https://github.com/ziglang/zig/issues/11251
            const u8x3 = @Vector(3, u8);
            var lhs = u8x3{ 0, 0, 0 };
            var rhs = u8x3{ 255, 255, 255 };
            var result = lhs -| rhs;
            const expected = u8x3{ 0, 0, 0 };
            try expect(mem.eql(u8, &@as([3]u8, expected), &@as([3]u8, result)));
        }
    };
    try S.doTheTest();
    try comptime S.doTheTest();
}

test "saturating multiplication" {
    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;

    // TODO: once #9660 has been solved, remove this line
    if (builtin.target.cpu.arch == .wasm32) return error.SkipZigTest;

    const S = struct {
        fn doTheTest() !void {
            // Broken out to avoid https://github.com/ziglang/zig/issues/11251
            const u8x3 = @Vector(3, u8);
            var lhs = u8x3{ 2, 2, 2 };
            var rhs = u8x3{ 255, 255, 255 };
            var result = lhs *| rhs;
            const expected = u8x3{ 255, 255, 255 };
            try expect(mem.eql(u8, &@as([3]u8, expected), &@as([3]u8, result)));
        }
    };

    try S.doTheTest();
    try comptime S.doTheTest();
}

test "saturating shift-left" {
    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;

    const S = struct {
        fn doTheTest() !void {
            // Broken out to avoid https://github.com/ziglang/zig/issues/11251
            const u8x3 = @Vector(3, u8);
            var lhs = u8x3{ 1, 1, 1 };
            var rhs = u8x3{ 255, 255, 255 };
            var result = lhs <<| rhs;
            const expected = u8x3{ 255, 255, 255 };
            try expect(mem.eql(u8, &@as([3]u8, expected), &@as([3]u8, result)));
        }
    };
    try S.doTheTest();
    try comptime S.doTheTest();
}

test "multiplication-assignment operator with an array operand" {
    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;

    const S = struct {
        fn doTheTest() !void {
            var x: @Vector(3, i32) = .{ 1, 2, 3 };
            x *= [_]i32{ 4, 5, 6 };
            try expect(x[0] == 4);
            try expect(x[1] == 10);
            try expect(x[2] == 18);
        }
    };
    try S.doTheTest();
    try comptime S.doTheTest();
}

test "@addWithOverflow" {
    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;

    const S = struct {
        fn doTheTest() !void {
            {
                var lhs = @Vector(4, u8){ 250, 250, 250, 250 };
                var rhs = @Vector(4, u8){ 0, 5, 6, 10 };
                var overflow = @addWithOverflow(lhs, rhs)[1];
                var expected: @Vector(4, u1) = .{ 0, 0, 1, 1 };
                try expectEqual(expected, overflow);
            }
            {
                var lhs = @Vector(4, i8){ -125, -125, 125, 125 };
                var rhs = @Vector(4, i8){ -3, -4, 2, 3 };
                var overflow = @addWithOverflow(lhs, rhs)[1];
                var expected: @Vector(4, u1) = .{ 0, 1, 0, 1 };
                try expectEqual(expected, overflow);
            }
            {
                var lhs = @Vector(4, u1){ 0, 0, 1, 1 };
                var rhs = @Vector(4, u1){ 0, 1, 0, 1 };
                var overflow = @addWithOverflow(lhs, rhs)[1];
                var expected: @Vector(4, u1) = .{ 0, 0, 0, 1 };
                try expectEqual(expected, overflow);
            }
            {
                var lhs = @Vector(4, u0){ 0, 0, 0, 0 };
                var rhs = @Vector(4, u0){ 0, 0, 0, 0 };
                var overflow = @addWithOverflow(lhs, rhs)[1];
                var expected: @Vector(4, u1) = .{ 0, 0, 0, 0 };
                try expectEqual(expected, overflow);
            }
        }
    };
    try S.doTheTest();
    try comptime S.doTheTest();
}

test "@subWithOverflow" {
    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;

    const S = struct {
        fn doTheTest() !void {
            {
                var lhs = @Vector(2, u8){ 5, 5 };
                var rhs = @Vector(2, u8){ 5, 6 };
                var overflow = @subWithOverflow(lhs, rhs)[1];
                var expected: @Vector(2, u1) = .{ 0, 1 };
                try expectEqual(expected, overflow);
            }
            {
                var lhs = @Vector(4, i8){ -120, -120, 120, 120 };
                var rhs = @Vector(4, i8){ 8, 9, -7, -8 };
                var overflow = @subWithOverflow(lhs, rhs)[1];
                var expected: @Vector(4, u1) = .{ 0, 1, 0, 1 };
                try expectEqual(expected, overflow);
            }
        }
    };
    try S.doTheTest();
    try comptime S.doTheTest();
}

test "@mulWithOverflow" {
    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;

    const S = struct {
        fn doTheTest() !void {
            var lhs = @Vector(4, u8){ 10, 10, 10, 10 };
            var rhs = @Vector(4, u8){ 25, 26, 0, 30 };
            var overflow = @mulWithOverflow(lhs, rhs)[1];
            var expected: @Vector(4, u1) = .{ 0, 1, 0, 1 };
            try expectEqual(expected, overflow);
        }
    };
    try S.doTheTest();
    try comptime S.doTheTest();
}

test "@shlWithOverflow" {
    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;

    const S = struct {
        fn doTheTest() !void {
            var lhs = @Vector(4, u8){ 0, 1, 8, 255 };
            var rhs = @Vector(4, u3){ 7, 7, 7, 7 };
            var overflow = @shlWithOverflow(lhs, rhs)[1];
            var expected: @Vector(4, u1) = .{ 0, 0, 1, 1 };
            try expectEqual(expected, overflow);
        }
    };
    try S.doTheTest();
    try comptime S.doTheTest();
}

test "alignment of vectors" {
    try expect(@alignOf(@Vector(2, u8)) == 2);
    try expect(@alignOf(@Vector(2, u1)) == 1);
    try expect(@alignOf(@Vector(1, u1)) == 1);
    try expect(@alignOf(@Vector(2, u16)) == 4);
}

test "loading the second vector from a slice of vectors" {
    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;

    @setRuntimeSafety(false);
    var small_bases = [2]@Vector(2, u8){
        @Vector(2, u8){ 0, 1 },
        @Vector(2, u8){ 2, 3 },
    };
    var a: []const @Vector(2, u8) = &small_bases;
    var a4 = a[1][1];
    try expect(a4 == 3);
}

test "array of vectors is copied" {
    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;

    const Vec3 = @Vector(3, i32);
    var points = [_]Vec3{
        Vec3{ 404, -588, -901 },
        Vec3{ 528, -643, 409 },
        Vec3{ -838, 591, 734 },
        Vec3{ 390, -675, -793 },
        Vec3{ -537, -823, -458 },
        Vec3{ -485, -357, 347 },
        Vec3{ -345, -311, 381 },
        Vec3{ -661, -816, -575 },
    };
    var points2: [20]Vec3 = undefined;
    points2[0..points.len].* = points;
    try std.testing.expectEqual(points2[6], Vec3{ -345, -311, 381 });
}

test "byte vector initialized in inline function" {
    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;

    if (comptime builtin.zig_backend == .stage2_llvm and builtin.cpu.arch == .x86_64 and
        builtin.cpu.features.isEnabled(@intFromEnum(std.Target.x86.Feature.avx512f)))
    {
        // TODO https://github.com/ziglang/zig/issues/13279
        return error.SkipZigTest;
    }

    const S = struct {
        fn boolx4(e0: bool, e1: bool, e2: bool, e3: bool) @Vector(4, bool) {
            return .{ e0, e1, e2, e3 };
        }

        fn all(vb: @Vector(4, bool)) bool {
            return @reduce(.And, vb);
        }
    };

    try expect(S.all(S.boolx4(true, true, true, true)));
}

test "zero divisor" {
    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO

    const zeros = @Vector(2, f32){ 0.0, 0.0 };
    const ones = @Vector(2, f32){ 1.0, 1.0 };

    const v1 = zeros / ones;
    const v2 = @divExact(zeros, ones);
    const v3 = @divTrunc(zeros, ones);
    const v4 = @divFloor(zeros, ones);

    _ = v1[0];
    _ = v2[0];
    _ = v3[0];
    _ = v4[0];
}

test "zero multiplicand" {
    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;

    const zeros = @Vector(2, u32){ 0.0, 0.0 };
    var ones = @Vector(2, u32){ 1.0, 1.0 };

    _ = (ones * zeros)[0];
    _ = (zeros * zeros)[0];
    _ = (zeros * ones)[0];

    _ = (ones *| zeros)[0];
    _ = (zeros *| zeros)[0];
    _ = (zeros *| ones)[0];

    _ = (ones *% zeros)[0];
    _ = (zeros *% zeros)[0];
    _ = (zeros *% ones)[0];
}

test "@intCast to u0" {
    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;

    var zeros = @Vector(2, u32){ 0, 0 };
    const casted = @as(@Vector(2, u0), @intCast(zeros));

    _ = casted[0];
}

test "modRem with zero divisor" {
    comptime {
        var zeros = @Vector(2, u32){ 0, 0 };
        const ones = @Vector(2, u32){ 1, 1 };

        zeros %= ones;
        _ = zeros[0];
    }
}

test "array operands to shuffle are coerced to vectors" {
    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;

    const mask = [5]i32{ -1, 0, 1, 2, 3 };

    var a = [5]u32{ 3, 5, 7, 9, 0 };
    var b = @shuffle(u32, a, @as(@Vector(5, u24), @splat(0)), mask);
    try expectEqual([_]u32{ 0, 3, 5, 7, 9 }, b);
}

test "load packed vector element" {
    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;
    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO

    var x: @Vector(2, u15) = .{ 1, 4 };
    try expect((&x[0]).* == 1);
    try expect((&x[1]).* == 4);
}

test "store packed vector element" {
    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;
    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_c) return error.SkipZigTest; // TODO

    var v = @Vector(4, u1){ 1, 1, 1, 1 };
    try expectEqual(@Vector(4, u1){ 1, 1, 1, 1 }, v);
    var index: usize = 0;
    v[index] = 0;
    try expectEqual(@Vector(4, u1){ 0, 1, 1, 1 }, v);
}

test "store to vector in slice" {
    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;

    var v = [_]@Vector(3, f32){
        .{ 1, 1, 1 },
        .{ 0, 0, 0 },
    };
    var s: []@Vector(3, f32) = &v;
    var i: usize = 1;
    s[i] = s[0];
    try expectEqual(v[1], v[0]);
}

test "store vector with memset" {
    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_c) return error.SkipZigTest; // TODO

    if (builtin.zig_backend == .stage2_llvm) {
        switch (builtin.target.cpu.arch) {
            .wasm32,
            .mips,
            .mipsel,
            .mips64,
            .mips64el,
            .riscv64,
            .powerpc,
            => {
                // LLVM 16 ERROR: "Converting bits to bytes lost precision"
                // https://github.com/ziglang/zig/issues/16177
                return error.SkipZigTest;
            },
            else => {},
        }
    }

    var a: [5]@Vector(2, i1) = undefined;
    var b: [5]@Vector(2, u2) = undefined;
    var c: [5]@Vector(2, i4) = undefined;
    var d: [5]@Vector(2, u8) = undefined;
    var e: [5]@Vector(2, i9) = undefined;
    var ka = @Vector(2, i1){ -1, 0 };
    var kb = @Vector(2, u2){ 0, 1 };
    var kc = @Vector(2, i4){ 2, 3 };
    var kd = @Vector(2, u8){ 4, 5 };
    var ke = @Vector(2, i9){ 6, 7 };
    @memset(&a, ka);
    @memset(&b, kb);
    @memset(&c, kc);
    @memset(&d, kd);
    @memset(&e, ke);
    try std.testing.expectEqual(ka, a[0]);
    try std.testing.expectEqual(kb, b[1]);
    try std.testing.expectEqual(kc, c[2]);
    try std.testing.expectEqual(kd, d[3]);
    try std.testing.expectEqual(ke, e[4]);
}

test "addition of vectors represented as strings" {
    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;

    const V = @Vector(3, u8);
    const foo: V = "foo".*;
    const bar: V = @typeName(u32).*;
    try expectEqual(V{ 219, 162, 161 }, foo + bar);
}

test "compare vectors with different element types" {
    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest; // TODO

    var a: @Vector(2, u8) = .{ 1, 2 };
    var b: @Vector(2, u9) = .{ 3, 0 };
    try expectEqual(@Vector(2, bool){ true, false }, a < b);
}

test "vector pointer is indexable" {
    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest; // TODO

    const V = @Vector(2, u32);

    const x: V = .{ 123, 456 };
    comptime assert(@TypeOf(&(&x)[0]) == *const u32); // validate constness
    try expectEqual(@as(u32, 123), (&x)[0]);
    try expectEqual(@as(u32, 456), (&x)[1]);

    var y: V = .{ 123, 456 };
    comptime assert(@TypeOf(&(&y)[0]) == *u32); // validate constness
    try expectEqual(@as(u32, 123), (&y)[0]);
    try expectEqual(@as(u32, 456), (&y)[1]);

    (&y)[0] = 100;
    (&y)[1] = 200;
    try expectEqual(@as(u32, 100), (&y)[0]);
    try expectEqual(@as(u32, 200), (&y)[1]);
}

test "boolean vector with 2 or more booleans" {
    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest; // TODO

    // TODO: try removing this after <https://github.com/ziglang/zig/issues/13782>:
    if (!(builtin.os.tag == .linux and builtin.cpu.arch == .x86_64)) return;

    const vec1 = @Vector(2, bool){ true, true };
    _ = vec1;

    const vec2 = @Vector(3, bool){ true, true, true };
    _ = vec2;
}

test "bitcast to vector with different child type" {
    if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest; // TODO

    const S = struct {
        fn doTheTest() !void {
            const VecA = @Vector(8, u16);
            const VecB = @Vector(4, u32);

            var vec_a = VecA{ 1, 1, 1, 1, 1, 1, 1, 1 };
            var vec_b: VecB = @bitCast(vec_a);
            var vec_c: VecA = @bitCast(vec_b);
            try expectEqual(vec_a, vec_c);
        }
    };

    // Originally reported at https://github.com/ziglang/zig/issues/8184
    try S.doTheTest();
    try comptime S.doTheTest();
}