On Tue, 16 Feb 2021 06:24:05 GMT, Vladimir Kempik <vkem...@openjdk.org> wrote:
>> This is when passing a float, yes? In the case where we have more float >> arguments than n_float_register_parameters_c. >> I don't understand why you think it's acceptable to bail in this case. Can >> you explain, please? > > it's for everything that uses less than 8 bytes on a stack( ints ( 4), > shorts(2), bytes(1), floats(4)). > currently native wrapper generation does not support such cases at all, it > needs refactoring before this can be implemented. > So when a method has more argument than can be placed in registers, we may > have issues. > > So we just bailing out to interpreter in case when a smaller (<=4 b) type is > going to be passed thru the stack. > > There was attempt to implement handling such cases but currently it requires > some hacks (like using some vectors for non-specific task) - > https://github.com/openjdk/aarch64-port/pull/3 OK. I checked and the Panama preview doesn't support direct native calls for stack arguments, so we're good for now. ------------- PR: https://git.openjdk.java.net/jdk/pull/2200
