Finding the prefix used for caravel subcells in the user GDS.
User prefix is yO_
Replacing cell caravel in the user GDS file.
Reading GDS file for alternate cell caravel
Cell caravel found at position 235669746
Cell caravel ends at position 247680056
Reading GDS file for original source ./gds/caravel_00010011.gds
Cell caravel found at position 2731432474
Cell caravel ends at position 2743442326
Cell caravel checksum is 12009824
Info:  Structure caravel matches checksum 12009824
Info:  Structure caravel at 2731432474 to 2743442326 will be replaced by alternate data.
Prefixing caravel subcells in the user GDS
Running:  /usr/share/pdk/bin/change_gds_string.py user_id_textblock yO_user_id_textblock copyright_block yO_copyright_block open_source yO_open_source storage yO_storage sky130_fd_sc_hvl__lsbufhv2lv_1_wrapped yO_sky130_fd_sc_hvl__lsbufhv2lv_1_wrapped user_id_programming yO_user_id_programming simple_por yO_simple_por gpio_control_block yO_gpio_control_block mgmt_core yO_mgmt_core mgmt_protect yO_mgmt_protect chip_io yO_chip_io user_project_wrapper yO_user_project_wrapper ./gds/caravel_00010011_b.gds -debug -verbatim
Original data length = 2743443048
Replaced b'open_source\x00' with b'yO_open_source'
Replaced b'user_id_textblock\x00' with b'yO_user_id_textblock'
Replaced b'copyright_block\x00' with b'yO_copyright_block'
Replaced b'storage\x00' with b'yO_storage'
Replaced b'sky130_fd_sc_hvl__lsbufhv2lv_1_wrapped' with b'yO_sky130_fd_sc_hvl__lsbufhv2lv_1_wrapped\x00'
Replaced b'user_id_programming\x00' with b'yO_user_id_programming'
Replaced b'simple_por' with b'yO_simple_por\x00'
Replaced b'gpio_control_block' with b'yO_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'yO_gpio_control_block\x00'
Replaced b'mgmt_core\x00' with b'yO_mgmt_core'
Replaced b'gpio_control_block' with b'yO_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'yO_gpio_control_block\x00'
Replaced b'mgmt_protect' with b'yO_mgmt_protect\x00'
Replaced b'gpio_control_block' with b'yO_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'yO_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'yO_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'yO_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'yO_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'yO_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'yO_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'yO_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'yO_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'yO_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'yO_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'yO_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'yO_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'yO_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'yO_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'yO_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'yO_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'yO_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'yO_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'yO_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'yO_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'yO_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'yO_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'yO_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'yO_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'yO_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'yO_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'yO_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'yO_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'yO_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'yO_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'yO_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'yO_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'yO_gpio_control_block\x00'
Replaced b'chip_io\x00' with b'yO_chip_io'
Replaced b'user_project_wrapper' with b'yO_user_project_wrapper\x00'
Finished.