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332 Commits

Author SHA1 Message Date
Virgil Dupras
7ca54d179d lib/expr: make EXPR_PARSE "tail" HL 
Things are now much simpler.
 2019-12-30 19:24:53 -05:00
Virgil Dupras
73a5275b1e lib/parse: make parseBinaryLiteral "tail" HL 2019-12-30 13:05:21 -05:00
Virgil Dupras
289037a3dd lib/parse: make parseDecimal "tail" HL 
HL, instead of being preserved, is set to the character following
the last read character.
 2019-12-30 10:13:55 -05:00
Virgil Dupras
dcb96aefe9 lib/parse: remove parseHexPair 
Also, make parseHexadecimal "tail" (HL). Soon, all routines in lib/parse
will do that, making the life of lib/expr easier.
 2019-12-29 21:56:56 -05:00
Virgil Dupras
2503bdfced lib/args: remove 2019-12-29 21:05:09 -05:00
Virgil Dupras
5f2615a134 at28w: don't use lib/args 2019-12-29 21:02:04 -05:00
Virgil Dupras
346bcc3d3d zasm: don't use lib/args 
This unit is being removed.
 2019-12-29 20:56:13 -05:00
Virgil Dupras
d0f031939f lib/parse: make parseLiteral a little tighter 
Sub-parsers are seldom used by themselves, except for parseDecimal.
I'm tightening the code of this unit for two reasons:

1. Optimization
2. Upcoming API change where HL won't be preserved anymore, but will
   point to char following the last parse char. This will allow us
   to simplify lib/expr.
 2019-12-29 19:47:19 -05:00
Virgil Dupras
15628da7de lib/expr: make EXPR_PARSE put result in DE instead of IX 
Finally getting rid of this bad mistake of using IX for this.
 2019-12-29 17:37:04 -05:00
Virgil Dupras
981c93bfd4 lib/expr: fix stack imbalance on failure 2019-12-29 16:15:48 -05:00
Virgil Dupras
213614af33 lib/expr: make recursion process a bit more orderly 
Instead of going left and right, finding operators chars and replacing them
with nulls, we parse expressions in a more orderly manner, one chunk at a
time. I think it qualifies as "recursive descent", but I'm not sure.

This allows us to preserve the string we parse and should also make the
implementation of parens much easier.
 2019-12-29 11:42:18 -05:00
Virgil Dupras
7410891ad1 lib/expr: fix unary minus 
For some reason, I've mistakenly disabled tests in test_expr without noticing
and I also broke "-123" parsing. Fixed.
 2019-12-23 20:53:31 -05:00
Virgil Dupras
6d88c3a754 parseExprDE --> parseExpr 2019-12-23 19:13:44 -05:00
Virgil Dupras
5301200d6f basic: parseExpr --> parseExprDE 2019-12-23 19:01:03 -05:00
Virgil Dupras
476178ee7c zasm: parseExpr --> parseExprDE 2019-12-23 18:44:55 -05:00
Virgil Dupras
cc754e12aa parseExpr --> parseExprDE: easy ones 
Those replacements were trivially equivalent. For the other ones, an
examination of the context is necessary.
 2019-12-23 15:59:55 -05:00
Virgil Dupras
a034f63e23 test: begin adding common test harnessing code 
This should make tests a bit more convenient to write and debug.

Moreover, begin de de-IX-ization of parseExpr. I have, in a local WIP, a
parseExpr implemented using a recursive descent algo, it passes all tests, but
it unfortunately assembles a faulty zasm. I have to find the expressions that
it doesn't parse properly.

But before I do that, I prefer to commit these significant improvements I've
been making to tests harness in parallel of this development.
 2019-12-23 15:41:25 -05:00
Virgil Dupras
98ca338aba avra: add LD/ST 2019-12-22 21:50:20 -05:00
Virgil Dupras
51e500e8da avra: avoid pgm addr truncation error on first pass 2019-12-22 19:44:46 -05:00
Virgil Dupras
b955a67daa avra: add TST 2019-12-22 19:24:36 -05:00
Virgil Dupras
6e1e8e0e59 avra: add LSL 2019-12-22 18:36:15 -05:00
Virgil Dupras
8ded02bc78 avra: fix misordered MOV, MUL, NEG and NOP 2019-12-22 18:35:08 -05:00
Virgil Dupras
f54e10f9fd avra: add CALL and JMP 2019-12-22 15:54:46 -05:00
Virgil Dupras
10b925e0e0 avra: add BCLR and BSET 2019-12-22 15:11:15 -05:00
Virgil Dupras
1771ee8da7 avra: add SER 2019-12-22 15:01:08 -05:00
Virgil Dupras
0a9ac27cf6 avra: add SBIC and SBIS 2019-12-22 14:55:38 -05:00
Virgil Dupras
a9dcba5793 avra: add CBR instruction 2019-12-22 14:45:10 -05:00
Virgil Dupras
c968995ec0 avra: add CBI and SBI 
This completes instruction support for the Blink tn45 example.
 2019-12-15 20:51:31 -05:00
Virgil Dupras
5c43988649 avra: code consolidation 2019-12-15 20:15:44 -05:00
Virgil Dupras
b130cac635 avra: code consolidation 2019-12-15 19:17:03 -05:00
Virgil Dupras
52359a4e42 avra: a little code deduplication 2019-12-15 18:52:00 -05:00
Virgil Dupras
e9c692ed50 avra: a litte bit of code deduplication 2019-12-15 18:34:14 -05:00
Virgil Dupras
2652c81519 avra: make CLR work properly 2019-12-15 16:43:32 -05:00
Virgil Dupras
20861767e6 avra: generalize arg swapping behavior 2019-12-15 16:36:43 -05:00
Virgil Dupras
14fbfa2967 avra: small _parseArgs refactoring 
Take argspec pairs directly as an argument instead of taking a
pointer to an argspec pair.
 2019-12-15 16:25:16 -05:00
Virgil Dupras
62eb5589c3 avra: refactor instruction tbl 
The instruction table is now beefier and has redundant data, but
this simplifies processing. This should simplify upcoming work.
 2019-12-15 15:53:28 -05:00
Virgil Dupras
aa8df95f7d Add "avr/" includes folder 
Also, add a "real world" example in AVRA tests, a blink program on
a ATtiny45. Some instructions are commented out because they aren't
implemented yet, but not many.

The output of the program has been verified against AVRA's own
output.
 2019-12-15 09:38:01 -05:00
Virgil Dupras
64935d8b40 avra: add IN and OUT instructions 2019-12-15 08:43:59 -05:00
Virgil Dupras
ab578159b7 avra: refactor args parsing 
This costs us a bit of space for now but should make things a lot
simpler down the road, especially with "alias ops" which are simple
syntactic sugar for another op.
 2019-12-14 15:17:55 -05:00
Virgil Dupras
fa75f30ffb avra: add RJMP and RCALL instructions 2019-12-14 12:28:27 -05:00
Virgil Dupras
33c480a5dd avra: remove useless instrBRBits table 
I had written this when trying different approaches to adding BR and
I forgot to remove it.
 2019-12-14 09:41:36 -05:00
Virgil Dupras
a5efc695e9 avra: add "Rd + bit" instructions 2019-12-14 09:33:46 -05:00
Virgil Dupras
c696fcbce4 avra: add "with immediate" instructions 2019-12-14 09:05:38 -05:00
Virgil Dupras
4b9712a224 avra: add branching instructions 2019-12-13 22:49:15 -05:00
Virgil Dupras
57c1a10434 avra: first steps 2019-12-13 17:38:40 -05:00
Virgil Dupras
e691dab070 zasm: little drive-by optimization 
Use IX directly for argspec rows instead of going through DE. It saves a bit
of processing. The code was this way because I initially didn't use IX at all,
so as code evolved, that DE translation stayed as an artifact.
 2019-12-13 10:54:01 -05:00
Virgil Dupras
0d7693a163 core: remove writeHLinDE 
It wasn't used much so I inlined it.
 2019-12-13 09:56:23 -05:00
Virgil Dupras
4f7a05e3b7 core: remove cpHLDE 
It wasn't used much, so I replaced its use in the kernel with direct code
and moved the routine in apps/ed, the only other place where it was used.
 2019-12-12 15:53:14 -05:00
Virgil Dupras
43f4c5200e basic: don't choke on ':' in '"' literals 2019-12-12 12:22:38 -05:00
Virgil Dupras
3db38b0d89 basic: add while command 2019-12-12 11:17:10 -05:00