Wrong answers/crashes

[chriselrod]

function readraw!(img, raw)
    npack = length(raw) ÷ 3
    @inbounds @simd for i in 0:npack-1
        img[1+4i] = raw[2+3i] << 4
        img[2+4i] = raw[1+3i]
        img[3+4i] = raw[2+3i]
        img[4+4i] = raw[3+3i]
    end
    imgv = reinterpret(UInt16,img)
    @inbounds @simd for i in 1:2npack
        imgv[i] >>>= 4
    end
    img
end
function readraw_turbo!(img, raw)
    npack = length(raw) ÷ 3
    @turbo for i in 0:npack-1
        img[1+4i] = raw[2+3i] << 4
        img[2+4i] = raw[1+3i]
        img[3+4i] = raw[2+3i]
        img[4+4i] = raw[3+3i]
    end
    img16 = reinterpret(UInt16,img)
    @turbo for i in 1:2npack
        img16[i] >>>= 4
    end
    img
end

w = 2048
raw = rand(UInt8, (3w*w) ÷ 4);
img1 = Matrix{UInt8}(undef, w, w); img2 = similar(img1);

readraw!(img1, raw)
readraw_turbo!(img2, raw)

This crashes on systems with AVX512:

julia: /home/chriselrod/Documents/languages/juliarelease/src/ccall.cpp:879: jl_cgval_t emit_llvmcall(jl_codectx_t&, jl_value_t**, size_t): Assertion `*it == f->getFunctionType()->getParamType(i)' failed.

On other systems, it apparently gets the wrong answer instead.