David Given
bd28bddb92
Massive rewrite of how emitters and the instruction selector works, after I
...
realised that the existing approach wasn't working. Now, hopefully, tracks the
instruction trees generated during selection properly.
2016-10-04 00:16:06 +02:00
David Given
3aa30e50d1
Come up with a syntax for register constraints.
2016-10-02 21:51:25 +02:00
David Given
91e277e046
Predicates work; we now have prefers and requires clauses. Predicates must be
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functions. Not convinced that semantic types are actually working --- there are
still problems with earlier statements leaving things in the wrong registers.
2016-10-01 13:56:52 +02:00
David Given
4a3a9a98dc
It doesn't really make a lot of sense to have BURG nonterminal names different
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to register classes, so combine them. Refactor the map code.
2016-10-01 12:17:14 +02:00
David Given
b32883b013
More properly keep track of register classes.
2016-09-29 22:32:43 +02:00
David Given
39aa672422
Sort of keep track of registers and register classes. Start walking the
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generated instruction tree --- holy cow, they look like instructions!
2016-09-25 22:17:14 +02:00
David Given
bcc74ba18d
Stupid stringlist is stupid. Use a proper data structure, properly abstracted
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out (so other things can use it).
2016-09-25 12:18:39 +02:00
David Given
7c028bdd45
We now record the code fragments to be emitted by each rule.
2016-09-25 00:21:46 +02:00
David Given
c8fcbe282a
More grammar changes.
2016-09-24 19:03:55 +02:00
David Given
d96ceea08a
Lots of exploratory new grammar for instruction definitions and string and
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fragment emission (none of which is hooked up to anything yet).
2016-09-24 13:08:17 +02:00
David Given
960259f0b0
Add support for labelled tree nodes.
2016-09-24 12:11:30 +02:00
David Given
4546dd5f22
Massive grammar overhaul and refactor. Hacked in support for predicates, where
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instructions can be turned on and off based on their parameters. New lexer
using a lexer. Now quite a lot of the way towards being a real instruction
selector.
2016-09-21 00:43:10 +02:00
David Given
13c117d15d
Import iburg.
2016-09-20 20:37:16 +02:00
