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Author SHA1 Message Date
David Given efab08178b Fix a bunch of issues with pushing and popping mismatched sizes, which the B 
compiler does a lot; dup 8 for pairs of words is now optimised.
 2017-01-07 18:47:00 +01:00
David Given 7710c76d56 Introduce sequence points before store instructions to prevent loads from the 
same address being delayed until after the store (at which point they'll return
the wrong value).
 2017-01-07 13:17:39 +01:00
David Given 953c08839f inn works now; add a helper for it. 2016-11-20 12:53:44 +01:00
David Given 196fa914b3 lxa now works, I hope; traps are better (and stubbed out on qemuppc). 2016-11-20 11:57:21 +01:00
David Given d5328492d7 Better handling of float conversions; more tests; converting to unsigned ints 
works now.
 2016-11-20 11:27:40 +01:00
David Given d31bc6a3f9 Made csa and csb work with mcg; adjust the libem functions and the 
corresponding invocation in the ncg table so the same helpers can be used for
both mcg and ncg. Add a new IR opcode, FARJUMP, which jumps to a helper
function but saves volatile registers.
 2016-11-19 10:55:41 +01:00
David Given 43439c6d0c Remember to push the result of lor onto the stack. 2016-11-17 22:04:32 +01:00
David Given 0289b1004e Allow values left on the stack at the end of the procedure (it's legal!). 2016-11-14 21:47:49 +01:00
David Given e3ebf986e9 More opcodes. 2016-10-29 13:32:09 +02:00
David Given 61349389fb More opcodes. sti can now cope with non-standard sizes (really need a better 
fix for this). Hack in crude support for mismatched stack pushes and pops (ints
vs longs).
 2016-10-29 12:48:05 +02:00
David Given 2cc2c0ae98 Lots more opcodes. Rearrange the stack layout so that fp->ab is a fixed value 
(needed for CHAINFP and FPTOAB). Wire up lfrs to calls via a phi when
necessary, to allow call-bra-lfr chains.
 2016-10-29 11:57:56 +02:00
David Given 111c13e253 More opcodes. 2016-10-24 20:15:22 +02:00
David Given a4644dee4d More opcodes. 2016-10-24 12:08:40 +02:00
David Given b22780c075 More opcodes, including the difficult and fairly stupid los/sts. 2016-10-23 22:24:08 +02:00
David Given abd0cedd61 Massive change to how IR types are handled; we use the type code for matching 
rather than the size. Much cleaner and simpler.
 2016-10-23 21:54:14 +02:00
David Given 11b0bc1055 More opcodes. 2016-10-22 20:32:51 +02:00
David Given 2d52b1fdaa Remove GETRET; values are now returned directly by CALL. Fix a bug in 
convertstackops which was resulting in duplicate IR groups.
 2016-10-22 12:13:57 +02:00
David Given ceb938fb3c More opcodes. 2016-10-22 11:26:28 +02:00
David Given 7ae888b754 Hacky workaround the way the Modula-2 compiler generates non-standard sized 
loads and saves. More opcodes; simplified table using macros.
 2016-10-22 10:48:22 +02:00
David Given 90d0661639 Typo fix. 2016-10-22 00:48:55 +02:00
David Given f851ab83af Better (and more correct) floating point conversions; fif; various new opcodes. 2016-10-22 00:48:26 +02:00
David Given d535be87b1 fef4 and fef8 is now cleaner, albeit slower; add some more register alias 
stuff.
 2016-10-22 00:02:15 +02:00
David Given 4db402f229 Add (pretty crummy) support for register aliases and static pairs of registers. 
We should have enough functionality now for rather buggy 8-bit ints and
doubles. Rework the table and the platform.c to match.
 2016-10-21 23:31:00 +02:00
David Given e4fec71f9c Lots more opcodes; better eviction behaviour; better register moves. Lots more 
PowerPC stuff (some working).
 2016-10-19 23:29:05 +02:00
David Given 938fb8c2fc Lots more opcodes. 2016-10-18 00:31:26 +02:00
David Given 5f0164db62 Bolt mcg into the PowerPC backend. It doesn't build yet, but it is generating 
*some* code.
 2016-10-17 00:06:06 +02:00
David Given a8ee82d197 Stop passing proc around, and use a global instead --- much cleaner. 2016-10-15 23:19:44 +02:00
David Given 7aa60a6451 Register spilling to the stack frame works, more or less. 2016-10-15 22:53:56 +02:00
David Given 9504aec2bd Function termination gets routed through an exit block; we now have prologues 
and epilogues. mcgg now exports some useful data as headers. Start factoring
out some of the architecture-specific bits into an architecture-specific file.
 2016-10-15 18:38:46 +02:00
David Given 5ad3aa8595 Add a pile of new instructions used by Pascal; I'm going to need to think about 
how locals and the local base are handled.
 2016-10-15 13:07:59 +02:00
David Given b2ddf12473 Some more opcodes. 2016-10-15 11:22:40 +02:00
David Given df239b3f90 Don't allow the same IR to be added to the sequence list more than once 
(sometimes happens because op_dup, but makes no sense).
 2016-10-12 00:45:36 +02:00
David Given 668cccdff1 A few more opcodes. 2016-10-11 00:29:18 +02:00
David Given 36cddd6afb Add some more opcodes; rearrange the registers to be more PowerPC-friendly. 2016-10-09 14:45:13 +02:00
David Given 8fedf5a0a8 Added support for the op_bXX conditional branch instructions. 2016-10-04 23:28:16 +02:00
David Given 79d4ab1d96 Add zrl opcode. Keep track of local sizes as well as offsets. 2016-10-02 16:08:46 +02:00
David Given bf73fcdb64 Add inl and del opcodes. 2016-10-02 14:44:21 +02:00
David Given b298c27c63 Refactor mcg.h as it's getting a bit big; keep track of register variables. 2016-10-02 00:30:33 +02:00
David Given a3cfe6047f More rigorous dealing of IR groups; no need for is_generated and is_root any 
more (but now passes are required to set IR roots properly when changing
instructions).
 2016-10-01 22:58:29 +02:00
David Given 0d246c0d73 Much better handling of fragments (no run-time code needed to distinguish them 
from registers) and better handling of individual hops within a paragraph ---
no more ghastly hacks to try and distinguish the input from the output.
 2016-09-29 22:06:04 +02:00
David Given c4b8e00ae2 Revamp the array module not to use nasty macros any more. Slightly more verbose 
to use, but definitely cleaner.
 2016-09-26 22:48:58 +02:00
David Given 67eb21d428 Rename struct insn to struct em (throughout). 2016-09-25 12:29:03 +02:00
David Given 629e0ddfc6 Some instruction selection is now happening. 2016-09-24 22:46:08 +02:00
David Given bb9aa030a5 Procedure compilation now happens after the entire EM file has been read in (so 
that we can look inside data blocks which might be defined in the future...
sigh, csa and csb). csa and csb no longer generate invalid IR.
 2016-09-24 01:04:00 +02:00
David Given ed67d427c9 Replaced the block splicer with a trivial block eliminator (which rewrites 
jumps to blocks which contain only a jump). Don't bother storing the bb graph
in the ir nodes; we can find it on demand by walking the tree instead ---
slower, but much easier to understand and more robust. Added a terrible map
library.
 2016-09-23 23:59:15 +02:00
David Given 9077baa850 Add a bodged in algorithm for converting basic block communication from stacked 
variables to SSA. Also add dead block removal and block splicing. IR code is
much better now.
 2016-09-22 23:19:29 +02:00
David Given 6a74cb2e11 Tracing cleanup. Simplified the IR code. Some more opcodes. 2016-09-22 00:15:48 +02:00
David Given 36d7d1ee4e Create hacky fake basic blocks for data fragments, used to track which 
instruction labels descriptor blocks refer to; this allows csa and csb to know
where they're going.
 2016-09-20 00:19:39 +02:00
David Given dcba03646b Treebuilder now gets to the bottom of my test file, merrily generating 
(probably horribly broken) IR.
 2016-09-19 23:30:41 +02:00
David Given 6ce2495aeb Store the EM code up front and build the basic block graph *before* 
generating the IR code. Lots more IR code.
 2016-09-19 23:06:59 +02:00