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Author SHA1 Message Date
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