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# This file shows the history of incompatible changes to
# Parrot that invalidated existing PBC (Parrot Byte Code) files.
#
# The latest version number of the bytecode format in this file
# is used by Parrot to version the bytecode files it writes and
# is able to read. In the future, Parrot should be able to read
# and/or write older bytecode versions too.
#
# Currently known actions that should be entered here
# (and invalidate PBC are):
#
# - deleting/changing/inserting existing ops in ops.num
# - changing operands of existing ops
# - adding/deleting/renaming a PMC to classes
# - changes in the packfile format itself
# - changes to any PMCs that are frozen into the .pbc like
# ParrotInterpreter (HLL_info), Subs and more
# - other core changes that invalidate byte code :)
#
# After changing PBC_COMPAT either disable t/native_pbc tests or
# better, if you have an i386 box at hand, regenerate the PBCs
# with tools/dev/mk_native_pbc and commit the changes

# or TODO much better: all .pbc files should make-depend on PBC_COMPAT

# Also, if you're removing an opcode, be sure to run
# make -f tools/dev/ops_renum.mak

# please insert tab separated entries at the top of the list

3.17 2008.06.26 jonathan sub PMC freeze format changed
3.16 2008.04.23 pmichaud remove other user stack opcodes
3.15 2008.04.22 pmichaud remove saveall/restoreall opcodes
3.14 2008.04.04 chromatic enabled div_i_ic_ic and div_n_nc_nc opcodes
3.13 2008.03.29 chromatic added does_i_p_pc opcode
3.12 2008.03.26 coke deleted classoffset
3.11 2008.03.26 coke deleted getattribute_p_p_i,setattribute_p_p_i
3.10 2007.12.18 coke deleted print_newline opcode
3.09 2007.12.13 chromatic added copy_p_p opcode
3.08 2007.12.12 allison added addhandler_p opcode
3.07 2007.12.12 tewk added die_s die_sc die_p die_pc opcodes
3.06 2007.11.28 coke remove classname opcode
3.05 2007.10.29 allison add get_eh, get_all_eh, and count_eh opcodes
3.04 2007.10.28 paultcochrane remove clear_eh opcode
3.03 2007.10.17 coke released 0.4.17
3.02 2007.09.20 bernhard remove opcode hash
3.02 2007.09.07 bernhard deprecate opcode substr_r
3.01 2007.08.17 chromatic store HLL names as strings in frozen Sub PMCs
3.0 2007.07.23 jonathan implementing new PBC header format
2.26 2007.07.17 particle released 0.4.14
2.25 2007.06.19 allison released 0.4.13
2.24 2007.05.16 bernhard remove opcodes adddoes, removedoes, singleton
2.23 2007.05.15 chromatic released 0.4.12
2.22 2007.04.17 mdiep released 0.4.11
2.21 2007.04.15 jonathan added get_class opcodes and clone_p_p_p opcode
2.20 2007.04.07 jonathan added addrole opcode
2.19 2007.03.20 coke released 0.4.10
2.18 2007.02.22 pmichaud released 0.4.9
2.17 2007.01.16 particle released 0.4.8
2.16 2006.12.16 paultcochrane deleted fetchmethod opcode
2.15 2006.11.14 chip released 0.4.7
2.14 2006.11.07 tewk added comp_flags to parrot_sub_t
2.13 2006.09.23 bernhard remove ops from dotgnu.ops
2.12 2006.08.18 leo removed None PMC from parrot core
2.11 2006.08.16 creiss added STM opcodes
2.10 2006.08.08 chip released 0.4.6
2.9 2006.06.19 leo released 0.4.5
2.8 2006.06.18 leo reorder opcodes
2.7 2006.05.14 leo released 0.4.4
2.6 2006.04.02 leo released 0.4.3
2.5 2006.03.21 leo remove deleted opcodes
2.4 2006.02.22 leo released 0.4.2
2.3 2006.01.08 leo released 0.4.1
2.2 2005.12.04 leo released 0.4.0, deleted opcodes
2.1 2005.12.01 leo inserted another pic ops
2.0 2005.11.22 leo changed PBC format (HLL_info)
1.4 2005.11.13 leo freeze outer_sub with Subs in PBC
1.3 2005.11.12 leo freeze lex_info with Subs in PBC
1.2 2005.11.06 leo deleted newsub, foldup, pack; 0.3.1 release
1.1 2005.10.17 leo deleted register stack opcodes
1.0 2005.10.15 jonathan changed debug segment format
0.27 2005.10.11 leo added reg usage to Subs in PBC
0.26 2005.10.07 leo deleted lot of opcodes
0.25 2005.10.05 leo deleted rx_ opcodes
0.24 2005.10.01 leo 0.3.0 release
0.23 2005.08.05 leo 0.2.3 release
0.22 2005.07.03 leo 0.2.2 release; add fixedintegerarray.freeze
0.21 2005.06.04 leo 0.2.1 release
0.20 2005.05.31 leo added HLL_id to frozen sub structure
0.19 2005.05.11 leo MMD function number change (rm MMD_I_LOGICAL...)
0.18 2005.05.08 leo 0.2.0 release
0.17 2005.04.22 leo removed add_p_* and friends, insert infix ops
0.16 2005.03.06 leo 0.1.2 release
0.15 2004.11.27 leo tossed 36 ops: gt,ge,isgt,isge w. I,N,S args
0.14 2004.11.27 leo tossed 13 ops: forgot some op_n_i
0.13 2004.11.27 leo tossed 177 ops: constants only, mixed args
0.12 2004.11.11 leo updates ops.num with some renumbering
0.11 2004.10.09 leo 0.1.1 release
0.10 2004.09.26 leo insert non-branching compare ops
0.9 2004.09.24 leo insert interpinfo_p opcodes
0.8 2004.02.29 leo 0.1.0 release
0.7 2003.11.21 leo remove unused size fields in front of PF constants
0.6 2003.10.31 leo 0.0.13 release
0.5 2003.10.24 dan add bogus opcode
0.4 2003.10.24 leo start using this file for fingerprinting
0.3 2003.10.22 dan add delegates.pmc
0.2 2003.10.21 dan delete instantiate op
0.1 2003.10.21 leo start this file
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