Zig 0.17.0-dev (Split by item)

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countTrues

simd.countTrues

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

File

lib/std/simd.zig:329

Code

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);
}