Function extract [src]

Prototype

 pub fn extract( vec: anytype, comptime first: VectorIndex(@TypeOf(vec)), comptime count: VectorCount(@TypeOf(vec)), ) @Vector(count, std.meta.Child(@TypeOf(vec)))

Parameters

first: VectorIndex(@TypeOf(vec))count: VectorCount(@TypeOf(vec))

Source

  pub fn extract(
    vec: anytype,
    comptime first: VectorIndex(@TypeOf(vec)),
    comptime count: VectorCount(@TypeOf(vec)),
) @Vector(count, std.meta.Child(@TypeOf(vec))) {
    const Child = std.meta.Child(@TypeOf(vec));
    const len = vectorLength(@TypeOf(vec));

    std.debug.assert(@as(comptime_int, @intCast(first)) + @as(comptime_int, @intCast(count)) <= len);

    return @shuffle(Child, vec, undefined, iota(i32, count) + @as(@Vector(count, i32), @splat(@intCast(first))));
}  