* Add optional `use_unbounded_threadpool` argument to `map`, to specify that the `map` should use an unbounded threadpool instead of the default pool that is based on the number of cores on the machine. This can improve throughput for map functions which perform IO or otherwise release the CPU.

VADDUWM V30, V31, V30; \ VXOR V30, V29, V22; \ VADDUWM V30, V31, V30 // Load the keys to be used for // encryption based on key_len. // Keys are in VS0 - VS14 // depending on key_len. // Valid keys sizes are verified // here. CR2 is set and used // throughout to check key_len. #define LOAD_KEYS(blk_key, key_len) \ MOVD $16, R16; \ MOVD $32, R17; \ MOVD $48, R18; \ MOVD $64, R19; \ LXVD2X (blk_key)(R0), VS0; \ LXVD2X (blk_key)(R16), VS1; \ LXVD2X (blk_key)(R17), VS2; \ LXVD2X (blk_key)(R18), VS3; \ LXVD2X...