Finding the prefix used for caravel subcells in the user GDS.
User prefix is fe_
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_0001001d.gds
Cell caravel found at position 2637206114
Cell caravel ends at position 2649215966
Cell caravel checksum is 12009824
Info:  Structure caravel matches checksum 12009824
Info:  Structure caravel at 2637206114 to 2649215966 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 fe_user_id_textblock copyright_block fe_copyright_block open_source fe_open_source storage fe_storage sky130_fd_sc_hvl__lsbufhv2lv_1_wrapped fe_sky130_fd_sc_hvl__lsbufhv2lv_1_wrapped user_id_programming fe_user_id_programming simple_por fe_simple_por gpio_control_block fe_gpio_control_block mgmt_core fe_mgmt_core mgmt_protect fe_mgmt_protect chip_io fe_chip_io user_project_wrapper fe_user_project_wrapper ./gds/caravel_0001001d_b.gds -debug -verbatim
Original data length = 2649216688
Replaced b'open_source\x00' with b'fe_open_source'
Replaced b'user_id_textblock\x00' with b'fe_user_id_textblock'
Replaced b'copyright_block\x00' with b'fe_copyright_block'
Replaced b'storage\x00' with b'fe_storage'
Replaced b'sky130_fd_sc_hvl__lsbufhv2lv_1_wrapped' with b'fe_sky130_fd_sc_hvl__lsbufhv2lv_1_wrapped\x00'
Replaced b'user_id_programming\x00' with b'fe_user_id_programming'
Replaced b'simple_por' with b'fe_simple_por\x00'
Replaced b'gpio_control_block' with b'fe_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'fe_gpio_control_block\x00'
Replaced b'mgmt_core\x00' with b'fe_mgmt_core'
Replaced b'gpio_control_block' with b'fe_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'fe_gpio_control_block\x00'
Replaced b'mgmt_protect' with b'fe_mgmt_protect\x00'
Replaced b'gpio_control_block' with b'fe_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'fe_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'fe_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'fe_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'fe_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'fe_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'fe_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'fe_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'fe_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'fe_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'fe_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'fe_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'fe_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'fe_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'fe_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'fe_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'fe_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'fe_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'fe_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'fe_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'fe_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'fe_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'fe_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'fe_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'fe_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'fe_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'fe_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'fe_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'fe_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'fe_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'fe_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'fe_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'fe_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'fe_gpio_control_block\x00'
Replaced b'chip_io\x00' with b'fe_chip_io'
Replaced b'user_project_wrapper' with b'fe_user_project_wrapper\x00'
Finished.