Finding the prefix used for caravel subcells in the user GDS.
User prefix is i4_
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_0001000a.gds
Cell caravel found at position 2094878850
Cell caravel ends at position 2106888702
Cell caravel checksum is 12009824
Info:  Structure caravel matches checksum 12009824
Info:  Structure caravel at 2094878850 to 2106888702 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 i4_user_id_textblock copyright_block i4_copyright_block open_source i4_open_source storage i4_storage sky130_fd_sc_hvl__lsbufhv2lv_1_wrapped i4_sky130_fd_sc_hvl__lsbufhv2lv_1_wrapped user_id_programming i4_user_id_programming simple_por i4_simple_por gpio_control_block i4_gpio_control_block mgmt_core i4_mgmt_core mgmt_protect i4_mgmt_protect chip_io i4_chip_io user_project_wrapper i4_user_project_wrapper ./gds/caravel_0001000a_b.gds -debug -verbatim
Original data length = 2106889424
Replaced b'open_source\x00' with b'i4_open_source'
Replaced b'user_id_textblock\x00' with b'i4_user_id_textblock'
Replaced b'copyright_block\x00' with b'i4_copyright_block'
Replaced b'storage\x00' with b'i4_storage'
Replaced b'sky130_fd_sc_hvl__lsbufhv2lv_1_wrapped' with b'i4_sky130_fd_sc_hvl__lsbufhv2lv_1_wrapped\x00'
Replaced b'user_id_programming\x00' with b'i4_user_id_programming'
Replaced b'simple_por' with b'i4_simple_por\x00'
Replaced b'gpio_control_block' with b'i4_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'i4_gpio_control_block\x00'
Replaced b'mgmt_core\x00' with b'i4_mgmt_core'
Replaced b'gpio_control_block' with b'i4_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'i4_gpio_control_block\x00'
Replaced b'mgmt_protect' with b'i4_mgmt_protect\x00'
Replaced b'gpio_control_block' with b'i4_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'i4_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'i4_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'i4_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'i4_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'i4_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'i4_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'i4_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'i4_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'i4_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'i4_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'i4_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'i4_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'i4_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'i4_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'i4_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'i4_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'i4_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'i4_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'i4_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'i4_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'i4_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'i4_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'i4_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'i4_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'i4_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'i4_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'i4_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'i4_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'i4_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'i4_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'i4_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'i4_gpio_control_block\x00'
Replaced b'gpio_control_block' with b'i4_gpio_control_block\x00'
Replaced b'chip_io\x00' with b'i4_chip_io'
Replaced b'user_project_wrapper' with b'i4_user_project_wrapper\x00'
Finished.