2 The goal of this assembler is to eventually not be simply an M68K
3 assembler, but to be relatively easily retargetable. Also, this
4 assembler should be callable from other CL applications, as well as
5 executable as a stand-alone program.
8 Things to add in the grammar/parser/lexer:
10 Support for ' (single ASCII character?) -- only because the
11 book I have says it's part of Motorola's standard. Should it
12 behave like double-quotes or what?
13 Support for floats (once FPU instructions are supported).
14 Line continuations with "\".
18 Things to add in the assembler:
20 Verify that BSS contains only zeros.
21 Checking ranges of types, signed indices, etc.
22 Also, type checking information stored in the symbol table.
23 Output listings (with cycle counts, et cetera).
24 Add better PC-relative stuff (.+6 or *+42 notation f.ex).
25 Support for later chips in the m68k line, and enabling/disabling
26 allowance of their added instructions.
27 Change lookup tables so that on load, they get converted to hash
28 tables or whatever's appropriate.
29 Nifty local labels a-la GNU as or similar. (0f, 1b, etc)
30 CL-style macros? (that would be cool!)
32 Output in object formats other than A.OUT.
33 Optimizations/data flow analysis.
36 THINGS TO DO BEFORE RELEASE
38 - remove debugging output.
39 - add a decent warning/error display and logging system.
40 - compile list of known issues, try to resolve.
41 - start converting improvised list structure into real structures or
43 - put together a basic automated test suite.
44 (once object format has settled down, start a set of regression files,
45 with sane output verified by hand.)
47 - once a better warning system is in place, allow routines like
48 MODIFIER-BITS to guess the size of underspecified operations, and warn
49 about them at suitable warning levels.
50 - test with sourcer68 output of various files.
51 - Things to test about relocation:
52 are 8-bit indirect displacements being relocated correctly?
53 verify all possible relocation combinations.
54 - Update dependencies in ASDF file so that it compiles without warnings.
60 - macro parameters are broken. At least, <foo> style ones are still
62 - no checking of vconstraints yet. [codegen]
63 - DC.B should handle strings properly (right now it will probably only
64 write out the last byte). [assembler]
65 - Unfinished pseudo-ops:
70 - branch-displacement-bits will behave badly in some unusual situations.
71 - data segment relocations are unsupported.
74 KNOWN MAJOR INCOMPATIBILITIES WITH DEVPAC
76 These are things which aren't likely to change soon.
80 - we don't support < or > embedded in macro parameters which are
81 already wrapped in < and >. (eg: "<foo>>>>2>" => "foo>>2") [lexer]
84 ENHANCEMENTS FROM DEVPAC
86 - We support EXTERN/GLOBAL as synonyms for XREF/XDEF,
87 respectively. Also ALIGN as a simple version of CNOP.