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Author SHA1 Message Date
David Given d63a359a49 Fix nearly all the comparisons, a lot of which were broken. Using a rst for 
unsigned comparisons is surprisingly not that useful due to marshalling
overhead; it's only four bytes to do inline (plus jc), or six for a constant.
Also add some useful top optimisations.  Star Trek goes from 39890 to 39450
bytes.
 2019-02-15 21:30:27 +01:00
David Given 91c75f81b5 Call cmps rather than cmpu for bge... make cmps and cmpu rsts. Apply various 
other tiny optimisations.
 2019-02-15 00:38:39 +01:00
David Given 2924ce8ffa Use nicely optimised helper tools to do signed comparisons of words. Star Trek 
goes from 40452 to 39890 bytes.
 2019-02-14 23:57:55 +01:00
David Given 3c3d2a4520 Fix bad helper tool invocation for inl with faddrn. 2019-02-14 23:21:47 +01:00
David Given 8eaa11ac72 Turns out that every time the compiler tried to do a stack retraction with asp, 
it would flush registers onto the stack. This stops it doing this. Star Trek
goes from 40779 to 40452 bytes.
 2019-02-14 00:05:08 +01:00
David Given 6e3ba8e9a0 Merge from default. 2019-02-13 22:46:00 +01:00
David Given 79a38ecc08 Instead of using parameterised rsts for stack access, add a huge swathe of 
automatically built helper tools. Star Trek goes up from 40243 to 40779 bytes,
but should be a lot faster.
 2019-02-13 22:45:22 +01:00
David Given 8200f041c2 Fix issue with logical operations and small signed constants which turned out 
to affect multiple platforms.
 2019-02-13 20:56:10 +01:00
David Given f4b45f1ed7 Fix bad code generation due to not correctly flushing the stack before 
comparisons.
 2019-02-12 22:19:07 +01:00
David Given 360e1525ae Replace the non-working Z80 style signed comparison sign adjustment with 
something which actually works on the 8080. Sadly, Star Trek is up to
40243 bytes again.
 2019-02-12 11:57:37 +01:00
David Given e8994afdf0 Apply Alan Cox's patch to add the 8085 extended instructions to the i80 
assembler.
 2019-02-11 21:14:35 +01:00
David Given f1b128baeb Signed comparisons now work correctly; sadly, Star Trek increases from 39656 to 
39726 bytes. Note that the emulator doesn't set P/V correctly and all the tests
fail. Testing in z80ex works fine.
 2019-02-11 20:46:06 +01:00
David Given fca54ccc1b Improve subtractions, using dad and inline constants where possible. Shrinks 
Star Trek from 39740 to 39656 bytes.
 2019-02-10 19:40:48 +01:00
David Given 7d34cd7407 Simplify simple comparisons and use inlie constants where possible. Reduces 
Star Trek from 39771 to 39740 bytes.
 2019-02-10 19:22:43 +01:00
David Given 35d1f36ca4 Use pop rather than inx;inx to retract the stack; consumes a register but 
halves the number of calls. Reduces Star Trek from 39976 to 39771 bytes.
 2019-02-10 18:57:20 +01:00
David Given b34ff2bdec Teach the i80 code generator how to do left shifts by using dad hl; prevents it 
from calling out to .sli2 for simple shifts. Shrinks Star Trek from 40055 bytes
to 39976.
 2019-02-10 18:44:47 +01:00
David Given c95d5db372 Replace mkstemp() with the more modern and safer and simpler tmpfile(). 2019-02-10 14:36:15 +01:00
David Given 63fa647bc9 freopen() appears to be problematic on OSX; as it's only ever used to rewind 
files, replace with rewind().
 2019-02-10 14:32:17 +01:00
David Given 1dfafe070c Better error reporting. 2019-02-10 14:19:18 +01:00
David Given 58698bed19 Removed a whole bunch of old strcpy() prototypes in favour of <string.h>. 2019-02-10 13:20:04 +01:00
David Given 10b509d6b6 Add rst 3 to get the address of a frame variable; lots of rule overhaulage. 
Reduces Star Trek from 41821 to 41055 bytes.
 2019-02-09 13:29:41 +01:00
David Given 0de5001f82 Make sign extension much less horrible. 2019-02-08 23:16:57 +01:00
David Given 0ac145a0d1 Add tests for simple and, or, and xor; drastically improve the i80 code 
generation for these.
 2019-02-08 22:38:07 +01:00
David Given a91ab5c599 Somehow the implementation of rst 2 got lost, with hilarious results. Also fix 
some register corruption issues (I hope).
 2019-02-08 21:35:14 +01:00
David Given d319c7d679 Fix swapped bytes in probyte which was causing junk stack frames. 2019-02-08 08:09:55 +01:00
David Given a5bf2932c8 Add rst 1 to store frame variables. Reduces Star Trek from 42339 to 41821 
bytes.
 2019-02-07 09:31:38 +01:00
David Given 67a9be26d1 Fix warnings. 2019-02-07 09:09:31 +01:00
David Given 9d8ea79c7f rst 1 now takes an eight-bit parameter, not a 16 bit one. Reduces Star Trek 
again from 43205 to 42339 bytes.
 2019-02-07 08:45:20 +01:00
David Given 5ac280026e Experimentally use rst 1 to optimise frame variable loads. Reduces Star Trek 
from 43892 to 43205 bytes.
 2019-02-07 00:06:32 +01:00
David Given 08b92153a0 Use a helper function for cai --- only saves two bytes per invocation, but is 
much less embarassing.
 2019-02-06 20:36:23 +01:00
David Given 2b0629f87f Common out boilerplate function prologue code; shrinks Star Trek from 44256 to 
43892 bytes.
 2019-02-06 16:06:07 +01:00
David Given b77f616598 Run through clang-format before editing. 2019-02-06 11:50:05 +01:00
David Given 02779325ab Move the standard ret boilerplate into a helper procedure, to save a little 
space.
 2019-02-06 08:08:11 +01:00
David Given ed91ea4371 When parsing constants which don't fit into an arith, handle overflow properly 
(and don't turn them all into INT_MAX...).
 2018-09-22 12:45:59 +02:00
David Given 79e7636537 Teach the code generator about the zero register and how to efficiently access 
the stack.
 2018-09-22 11:49:13 +02:00
David Given 99fcde69dc Take hreg aliases into account when finding evicted registers and performing 
the register shuffle dance.
 2018-09-22 11:19:50 +02:00
David Given bbb708717a Add the OPTIONS clause to the mcgg grammar; add an optional pass which converts 
sequences of PUSHes to a single STACKADJUST followed by STOREs. This should
dramatically improve code on stack-unfriendly architectures like MIPS.
 2018-09-22 11:19:00 +02:00
David Given 985d3dc7d1 Remove some old, hopefully unused PowerPC code. Teach the code generator about 
non-volatile long registers.
 2018-09-20 23:30:38 +02:00
David Given 65a20ce2d6 Fix subtle register corruption bug where aliases weren't taken into account 
when assigning input registers to phis, which could cause the same hreg to be
assigned to two vregs of different types. Also improve tracing.
 2018-09-20 23:24:46 +02:00
David Given cb20856aea A few more minor optimisations. 2018-09-20 00:39:13 +02:00
David Given ac856f3b09 The approach I was taking to csa and csb turns out not to work --- critical 
edge splitting can cause new basic blocks to be added to the graph, but while
the graph itself gets properly rewritten the descriptor tables can't be updated
to take these into account, so they end up pointing at the wrong blocks. This
causes really hard-to-debug problems.

The new approach is to parse the descriptor blocks and then generate a
comparison chain. Brute force, but much easier for the compiler to reason
about.
 2018-09-20 00:12:03 +02:00
David Given ac921080b7 Fix incorrect ori encoding. 2018-09-20 00:06:26 +02:00
David Given 8fda024ec8 Remember to save longs and doubles. Yikes. 2018-09-19 00:09:50 +02:00
David Given d23d2dd1b3 Loads and stores (except longs, which are difficult) are now loaded with two 
instructions rather than three.
 2018-09-18 23:38:37 +02:00
David Given 52ee317878 Fixed some bad mcg ir code generation: only nodes which have been appendir'd 
may be used multiple times.
 2018-09-18 23:32:53 +02:00
David Given 692caa2b0a Add unsigned comparison rules. 2018-09-18 00:19:40 +02:00
David Given f362d12dee Add extern declaration which I forget to check in. 2018-09-17 23:59:49 +02:00
David Given fe177bd688 Add specialist rules for signed integer comparisons; much better code. 2018-09-17 23:53:18 +02:00
David Given ec0891469f Array descriptor ranges are inclusive; adjust aar and the tests to check for 
this. All the tests except rotate build now!
 2018-09-17 19:34:38 +01:00
David Given f61500c51b Fix lar and sar, which were horribly, horribly broken. Add tests. 2018-09-17 18:44:17 +01:00
David Given abb7e3e105 Fix aar; add test. 2018-09-17 16:59:45 +01:00
David Given b665efca04 ACK loi 1 and sti 1 load and store unsigned bytes. I think. 2018-09-17 15:03:44 +01:00
David Given c2dc1e184e rotate() now generates valid code. 2018-09-17 13:13:39 +01:00
David Given 0202ac8700 Fix bls4. 2018-09-17 12:53:27 +01:00
David Given 1e073e944a Added cms, and a test for it. 2018-09-17 12:42:10 +01:00
David Given 0b65591972 Add hacky 64-bit comparisons (used by M2). 2018-09-17 12:16:17 +01:00
David Given 15ae171aef Added a test for set. Fix mips set implementation. 2018-09-17 11:56:15 +01:00
David Given 7efb749003 Set fixes; also add discrete tests for and, ior, xor. 2018-09-14 14:13:35 +01:00
David Given 08b1e8d71b Make inn work; fix broken 64-bit loads and stores. 2018-09-14 13:48:43 +02:00
David Given 5d0876a30b Implement a working .trp. 2018-09-14 12:26:27 +02:00
David Given ba0849c87c Remove la; turns out that the assembler gets upset if you ask it to 
generate more than one fixup per instruction (I think).
 2018-09-14 11:30:15 +02:00
David Given c4e3d0903e Bugfix rck. 2018-09-14 00:38:31 +02:00
David Given 8c0b2f8aee Fix csa and csb. 2018-09-14 00:15:43 +02:00
David Given 9b0a1c1c10 Make work with clang. 2018-09-14 00:04:25 +02:00
David Given 57338b1991 Fix an incorrect instruction, and incredibly broken li handling. 2018-09-12 23:59:09 +02:00
David Given ecb3395aba Converting floats and doubles to integers now works, as much as these ever do 
on MIPS; turns out that it can't (or at least can't in qemu) reliably turn
INT_MIN from a double to an int.
 2018-09-12 23:58:48 +02:00
David Given 642956fa2f mcg now uses dataf4 and dataf8 to emit floating point constants, and so doesn't 
need flt_arith any more. (And also generates them correctly on little-endian
systems.) as now parses numbers properly, doesn't trash memory all over the
place, and can handle negative numbers.
 2018-09-12 23:19:32 +02:00
David Given 8105281534 Make sure li works properly when loading fixed up values which end up as 0. Use 
lui rather than li to load high values.
 2018-09-12 22:28:40 +02:00
David Given a8df9721d3 Adding new tokens to the assembler isn't quite as easy as I thought: ensure 
that NUMBERF is stored properly in the temporary file.
 2018-09-12 22:27:39 +02:00
David Given 8379969b6f Fix an unsubtle bug where subtractions were done backwards... 2018-09-11 23:16:50 +02:00
David Given 8230ec42ac Fix a subtle thinko which was causing bits 2-3 of jump targets to be reset. 2018-09-11 23:16:30 +02:00
David Given 0ce368324e Add the bitset helpers. We now have enough helpers for the tests to run (and 
massively fail).
 2018-09-10 23:37:28 +02:00
David Given 2f8fe3ce6e Do some cleanup; ha16[] and friends can now be used with li. 2018-09-10 23:37:04 +02:00
David Given 3122946a6f Replaced some incorrect hi16s with ha16s. 2018-09-10 23:21:54 +02:00
David Given 008737ed19 Added some more very untested helper functions. 2018-09-10 23:20:52 +02:00
David Given a1747ac916 Add the .dataf4 and .dataf8 directives to the assembler --- manually converting 
floats and doubles to bytes is not fun. It might even work!
 2018-09-10 22:56:18 +02:00
David Given 53f7de794a Ansify. 2018-09-10 22:55:05 +02:00
David Given 976fa0efca Clang-format before editing. 2018-09-10 22:37:04 +02:00
David Given 6275896a11 Clang-format before editing. 2018-09-10 22:25:14 +02:00
David Given 185e910246 Lots more untested helper functions. 2018-09-10 01:08:25 +02:00
David Given f8f6fa9fc1 Added some more incredibly untested helper functions. 2018-09-10 00:21:16 +02:00
David Given bb15c03339 Remember to preserve input registers if we're going to be reading from them 
after writing to the output register.
 2018-09-09 18:53:49 +02:00
David Given e88670dad4 Yikes! Turns out that FPU registers are only 32 bits wide, and doubles are 
stored in pairs, just like on the PowerPC!
 2018-09-09 18:25:00 +02:00
David Given 5dfef6f180 Rework relocations again: add RELO2HI and RELO2HISAD for the high two bytes of 
a word.
 2018-09-09 14:11:11 +02:00
David Given 95dd6f0141 Fix some niggling issues --- we have our first binary now! 2018-09-09 12:24:22 +02:00
David Given b3b7c684c6 Simplify MIPS relocations. Add RELS2 (for generic high-word relocations). Add 
support for MIPS branch-and-jump relocations.
 2018-09-09 12:23:59 +02:00
David Given 0d8d98fd0f Warning fix. 2018-09-09 12:22:59 +02:00
David Given d2a1d4dcda Added some very untested csa and csb implementations, based on the PowerPC 
ones.
 2018-09-08 23:12:57 +02:00
David Given 75308901bc Added hi[] and lo[] functions to the assembler; fix things enough that we now 
get to the point of failing to link programs.
 2018-09-08 22:42:06 +02:00
David Given 379c1a4a3c Rework floating point conversion. Bash enough of the table into workingness 
that the libraries build now.
 2018-09-08 22:06:38 +02:00
David Given d2c14ca44f Precisely one stack hreg gets allocated for each vreg/congruence group for 
eviction; this prevents us from having to worry about moving values from stack
slot to stack slot, which is hard.
 2018-09-08 18:59:55 +02:00
David Given b7a1c96986 MIPS appears to hate converting unsigneds to floats and vice versa. 2018-09-05 23:53:38 +02:00
David Given fc0b0ae178 (Slightly) better errors on phi congruence group mismatches. 2018-09-05 23:53:08 +02:00
David Given 7fbce066f8 We attempt to compile the first library function; we fail. 2018-09-05 00:13:01 +02:00
David Given 26fe3f7530 Added library skeletons. 2018-09-05 00:07:07 +02:00
David Given 26c0228b14 The examples all compile now (probably incorrectly, and the libc doesn't 
compile yet).
 2018-09-04 23:55:28 +02:00
David Given 9d80756253 Lots of assembler and rule bugfixing. 2018-09-04 23:43:24 +02:00
David Given fe5ca5a85f Added li and la instructions. 2018-09-03 22:47:41 +02:00
David Given 26f9b4ceae Add in floating point support to the code generator. 2018-09-03 22:06:05 +02:00
David Given f8e71d888b Add some painfully untested FPU instructions. 2018-09-02 21:36:09 +02:00