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Author SHA1 Message Date
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
David Given
1d6ecddcf4 The MIPS backend is still full of holes, and cut-and-pasted PowerPC code, but 
is beginning to look like an actual code generator.
 2018-09-02 18:57:25 +02:00
David Given
4741ed8e14 Add a completely non-tested table-based MIPS assembler. 2018-09-01 19:35:31 +02:00
David Given
d623440c77 Add the core of a simple em22 platform. Unfortunately it doesn't work; the old 
em libmon vanished decades ago (or never existed), and also ass appears to have
a different idea of what the em opcodes are to everything else and gets
confused.
 2018-06-10 20:25:48 +09:00
David Given
911ce7ceb5 Crudely tweak some of the prototypes to please clang, which is pickier about 
K&R C than gcc is.
 2018-06-02 21:31:18 +02:00
David Given
05ddefad65 Adopt a copy of Minix 2's ed; this allows the ACK's antiquated ed scripts to 
run with a minimum of tweaking. Rewriting them for modern ed looks really hard.

Fixes: #84
 2018-06-02 18:02:51 +02:00
George Koehler
1df4db99c9 Optimize libfp. Don't lose -O6 in ackcflags. 
This drops 124 bytes from the mandelbrot command (from 15015 to 14891
bytes) but has almost no effect on performance; the command takes
about 144 seconds (in YAZE-AG) both before and after optimizing libfp.
 2018-04-25 22:48:28 -04:00
George Koehler
93e01eb5d1 Teach i80 ncg to use libfp. Enable ack -mcpm -fp. 
Old .o files stop working if they use floating point.  One must
recompile those files.  Old files don't call libfp in the correct way,
and may use symbols that I removed from libem.  I don't keep old
symbols in libem/flp.s, because a program that pulls both libfp and
flp.s would get "multiply defined" errors in the linker.

I teach mach/i80/ncg/table to use libfp by copying or adapting the
patterns from mach/i86/ncg/table.  I did not test all the patterns,
but I did use `ack -mcpm -fp -O4` to compile examples/mandelbrot.c,
then I ran it in the emulator YAZE-AG.  It worked, but it was slow.
 2018-04-25 16:09:56 -04:00
George Koehler
b9b3428e01 Build (but don't use) libfp for cpm. 
This library is for software floating point.  The i80 back end has
never implemented floating point, and might not be ready for libfp.
This commit only builds libfp without using it.

I edit first/build.lua and plat/build.lua to allow `ack -c.s`, then
use FP.script to edit the assembly code.  I edit FP.script so it
writes the edited assembly code to stdout, not to the input file.
 2018-04-25 00:34:10 -04:00
David Given
aabf0bdd69
Merge pull request #73 from kernigh/kernigh-pr 
better code from PowerPC ncg and mcg
 2018-03-13 13:57:28 +01:00
George Koehler
b1badf1851 Add instructions like "lwarx". Extend manual. 
Add more page numbers from PowerPC version 2.01.  Remove "xnop" not in
2.01, add "mtcr" from 2.01.  Add "lwarx" and the other instructions
from Book II.  I did not try all the newly added instructions, but
these seem to work: dcbt, dcbtst, icibi, isync, lwarx, stwcx., mftb,
mftbu

In man/powerpc_as.6 (not installed), add a summary of the registers
and addressing modes (like in i386_as.6), describe short forms, update
description of hi16/ha16, add CAVEATS about instructions that some
processors can't run.
 2018-03-07 13:37:31 -05:00
David Given
4b5a7fee14 Made the cgg and the cg code generator work; use this to beat the PDP/11 
backend into shape. It now generates binaries --- no idea whether they work or
not.
 2018-02-23 22:31:46 +01:00
George Koehler
a60738a50d Don't use '-' in option string to getopt(). 
Using '-' might fail on platforms like FreeBSD.  Commit 50a7031
stopped using '-' in the B compiler and ego.  I now stop using '-' in
mcg, because I can now check that mcg still works.
 2018-02-05 14:55:10 -05:00