Fastest way to unpack bigendian Int24?

General Usage
11

Sorry, I didn’t get that right (serves me right for not testing). This should be better:

for i = 1:1
    y  = UInt32(read(fid, UInt8)) << 24
    y |= UInt32(read(fid, UInt8)) << 16
    y |= UInt32(read(fid, UInt8)) << 8
    x[i] = (y % Int32) >> 8
end
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