/* MACLISP Compiled SUBR Block */ dcl 1 subr_block_head based aligned, /* this is the first part of the subr block */ 2 next_compiled_block ptr, /* for xctblt */ 2 instructions(4) bit(36), /* the common entry code */ 2 subr_code_link_offset bin(17) unal, /* points to subr code link */ 2 rest_of_tsplp bit(18) unal, /* tsplp ,ic* */ 2 gcmark bit(18) unal, /* for garbage collector to remember seeing this block */ 2 gc_length fixed bin(17) unal, /* number garbage collectable objects */ 2 constants(1000) fixed bin(71); /* the compiled constants */ /* alternate declaration of above */ dcl 1 subr_block_head_overlay based aligned, 2 first_word bit(36), 2 second_word aligned, 3 padding bit(28) unaligned, 3 no_links_are_snapped bit(1) unaligned, /* "1"b if no itp links in this block have been snapped */ 3 more_padding bit(7) unaligned; dcl 1 lisp_subr_links(1000) based aligned, /* the subr links follow the constants, and are the last gc'ed items */ 2 itp_base bit(3) unal, 2 itp_info bit(27) unal, /* produced by compiler */ 2 itp_mod bit(6) unal, 2 link_opr_tv_offset bit(18) unal, 2 mbz bit(12) unal, 2 further_mod bit(6) unal; /* when itp; this is indirect */ dcl 1 subr_entries(1000) based aligned, /* these are next in block, not gc'able */ 2 nargs bit(18) unal, 2 code_offset bit(18) unal, /* offset of entrypoint in object segment */ 2 head_offset bin(17) unal, /* offset to common entry sequence in subr_block_head */ 2 rest_of_tsx0 bit(18) unal; /* tsx0 ,ic */ dcl 1 link_to_subr_code based aligned, /* used by lisp_linker_ to find object segment */ 2 itp_to_linker ptr, /* points to linker, reset by linker to point to base of object seg */ 2 compilation_time fixed bin(71), /* used to verify linking to correct segment */ 2 name_length fixed bin(24), /* length of subroutines name...both segname and ename */ 2 name char(0 refer(link_to_subr_code.name_length)) unal; dcl instructions_for_subr (4) bit(36) static init("000000000000000100110010111000001111"b, "001111111111111100110101000001001111"b, "001111111111111110010101010001001111"b, "111111111111111110111010000000001000"b), tsplp_ic_ind bit(18) static init("110111000000010100"b), tsx0_ic bit(18) static init("111000000000000100"b); dcl 1 array_links (1000) aligned based, /* come after entries, before link_to_subr_code */ 2 instruction bit(36) aligned, /* tspbp to array_link_snap operator or eppbb *+2,* when snapped */ 2 control_word unaligned, /* controls what to snap to */ 3 type fixed bin(8), /* 0=S-expr, 2=fixnum, 3=flonum */ 3 ndims fixed bin(8), 3 atomic_symbol fixed bin(17), /* offset in constants to symbol which names array */ 2 pointer pointer; /* -> array_info block when snapped */ dcl 1 array_link_count aligned based, /* comes after array_links, before link_to_subr_code */ 2 unused bit(36), 2 number_of_array_links fixed bin(17) unaligned, 2 must_be_zero bit(18) unaligned; /* 0 to distinguish from tsx0 in subr block with no array links */ /* End of description of Compiled SUBR Block */ */ ----------------------------------------------------------- Historical Background This edition of the Multics software materials and documentation is provided and donated to Massachusetts Institute of Technology by Group Bull including Bull HN Information Systems Inc. as a contribution to computer science knowledge. This donation is made also to give evidence of the common contributions of Massachusetts Institute of Technology, Bell Laboratories, General Electric, Honeywell Information Systems Inc., Honeywell Bull Inc., Groupe Bull and Bull HN Information Systems Inc. to the development of this operating system. Multics development was initiated by Massachusetts Institute of Technology Project MAC (1963-1970), renamed the MIT Laboratory for Computer Science and Artificial Intelligence in the mid 1970s, under the leadership of Professor Fernando Jose Corbato. Users consider that Multics provided the best software architecture for managing computer hardware properly and for executing programs. Many subsequent operating systems incorporated Multics principles. Multics was distributed in 1975 to 2000 by Group Bull in Europe , and in the U.S. by Bull HN Information Systems Inc., as successor in interest by change in name only to Honeywell Bull Inc. and Honeywell Information Systems Inc. . ----------------------------------------------------------- Permission to use, copy, modify, and distribute these programs and their documentation for any purpose and without fee is hereby granted,provided that the below copyright notice and historical background appear in all copies and that both the copyright notice and historical background and this permission notice appear in supporting documentation, and that the names of MIT, HIS, Bull or Bull HN not be used in advertising or publicity pertaining to distribution of the programs without specific prior written permission. Copyright 1972 by Massachusetts Institute of Technology and Honeywell Information Systems Inc. Copyright 2006 by Bull HN Information Systems Inc. Copyright 2006 by Bull SAS All Rights Reserved */