Function countTrues [src]

Prototype

pub fn countTrues(vec: anytype) VectorCount(@TypeOf(vec))

Source

  pub fn countTrues(vec: anytype) VectorCount(@TypeOf(vec)) {
    const len = vectorLength(@TypeOf(vec));
    const CountIntType = VectorCount(@TypeOf(vec));

    const all_ones: @Vector(len, CountIntType) = @splat(1);
    const all_zeroes: @Vector(len, CountIntType) = @splat(0);

    const one_if_true = @select(CountIntType, vec, all_ones, all_zeroes);
    return @reduce(.Add, one_if_true);
}  