Finding the prefix used for caravel subcells in the user GDS.
User prefix is M2_
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_0001000f.gds
Cell caravel found at position 2840912296
Cell caravel ends at position 2852922148
Cell caravel checksum is 12009824
Info:  Structure caravel matches checksum 12009824
Info:  Structure caravel at 2840912296 to 2852922148 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 M2_user_id_textblock copyright_block M2_copyright_block open_source M2_open_source storage M2_storage sky130_fd_sc_hvl__lsbufhv2lv_1_wrapped M2_sky130_fd_sc_hvl__lsbufhv2lv_1_wrapped user_id_programming M2_user_id_programming simple_por M2_simple_por gpio_control_block M2_gpio_control_block mgmt_core M2_mgmt_core mgmt_protect M2_mgmt_protect chip_io M2_chip_io user_project_wrapper M2_user_project_wrapper ./gds/caravel_0001000f_b.gds -debug -verbatim
Original data length = 2852922870
Replaced b'open_source\x00' with b'M2_open_source'
Replaced b'user_id_textblock\x00' with b'M2_user_id_textblock'
Replaced b'copyright_block\x00' with b'M2_copyright_block'
Replaced b'storage\x00' with b'M2_storage'
Replaced b'sky130_fd_sc_hvl__lsbufhv2lv_1_wrapped' with b'M2_sky130_fd_sc_hvl__lsbufhv2lv_1_wrapped\x00'
Replaced b'user_id_programming\x00' with b'M2_user_id_programming'
Replaced b'simple_por' with b'M2_simple_por\x00'
Replaced b'gpio_control_block' with b'M2_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'M2_gpio_control_block\x00'
Replaced b'mgmt_core\x00' with b'M2_mgmt_core'
Replaced b'gpio_control_block' with b'M2_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'M2_gpio_control_block\x00'
Replaced b'mgmt_protect' with b'M2_mgmt_protect\x00'
Replaced b'gpio_control_block' with b'M2_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'M2_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'M2_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'M2_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'M2_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'M2_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'M2_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'M2_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'M2_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'M2_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'M2_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'M2_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'M2_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'M2_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'M2_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'M2_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'M2_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'M2_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'M2_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'M2_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'M2_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'M2_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'M2_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'M2_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'M2_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'M2_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'M2_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'M2_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'M2_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'M2_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'M2_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'M2_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'M2_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'M2_gpio_control_block\x00'
Replaced b'chip_io\x00' with b'M2_chip_io'
Replaced b'user_project_wrapper' with b'M2_user_project_wrapper\x00'
Finished.