Zig 0.17.0-dev (Split by item)

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lastTrue

simd.lastTrue

pub fn lastTrue(vec: anytype) ?VectorIndex(@TypeOf(vec))

File

lib/std/simd.zig:316

Code

pub fn lastTrue(vec: anytype) ?VectorIndex(@TypeOf(vec)) {
    const len = vectorLength(@TypeOf(vec));
    const IndexInt = VectorIndex(@TypeOf(vec));

    if (!@reduce(.Or, vec)) {
        return null;
    }

    const all_zeroes: @Vector(len, IndexInt) = @splat(0);
    const indices = @select(IndexInt, vec, iota(IndexInt, len), all_zeroes);
    return @reduce(.Max, indices);
}