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Author SHA1 Message Date
George Koehler 4fdfa3177e Fix em_led -u name when memory allocator moves ALLOMODL. 
Option -u was passing an offset from modulptr(0) in ALLOMODL to the
string in argv.  If entername() would move ALLOMODL to make room in
ALLOGCHR, then the offset would become invalid, so the string would
get lost.  This fix copies the string into ALLOMODL.

This was often not a problem because the initial size of ALLOGCHR in
mach.h is probably large enough for -u.  This became a problem when I
caused the initial allocations to fail, and then only because the B
runtime uses -u.
 2018-11-14 12:35:38 -05:00
George Koehler f09f14cd4d Switch from long to size_t when allocating memory. 
Also move the declarations of `incore` and `core_alloc` to "memory.h".
Also correct SYMDEBUG to SYMDBUG.  (I don't know if SYMDBUG works
because our build system never defines it.)

ind_t becomes an alias of size_t.  ind_t becomes unsigned, so I edit
some code that was using negative ind_t.  Some casts disappear, like
(long)sizeof(...) because the size is already a size_t.  There are
changes to overflow checks.  Callers with a size too big for size_t
must check it before calling the memory allocator.  An overflow check
of BASE + incr in memory.c sbreak() now happens on all platforms, not
only when a pointer is smaller than a long.

My build shows no changes in share/ack/examples (except hilo_bas.*
changing with every build).
 2018-11-14 12:33:25 -05:00
David Given c55ed2acfa
Merge pull request #135 from kernigh/kernigh-mv-int 
Move int to $(INSDIR)/bin/int
 2018-11-05 21:48:17 +01:00
George Koehler df855248a0 Move int to $(INSDIR)/bin/int 
If $(INSDIR)/bin is in PATH, then the user can run both ack(1) and
int(1), like

    $ ack -mem22 -o prog prog.c
    $ int prog
 2018-11-05 15:14:29 -05:00
David Given 1b60af4f0b
Merge pull request #133 from davidgiven/dtrg-mips 
Allow constants >INT_MAX in mcg
 2018-09-22 17:30:52 +02:00
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 c6a1cf8de4
Merge pull request #132 from davidgiven/dtrg-mips 
Teach mcg how to merge pushes
 2018-09-22 11:04:13 +01:00
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 8fd3e1f5ce
Merge pull request #131 from davidgiven/dtrg-mips 
Add an mcg-based MIPS code generator.
 2018-09-20 23:05:55 +01:00
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 436d50b54c Create correctly sized csa descriptors in the Basic compiler. 2018-09-20 00:49:31 +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 365c89c9e7 Updated READMEs with the MIPS platform. 2018-09-18 23:49:31 +02:00
David Given 9333b323a5 Make the MIPS boot code produce correct code. 2018-09-18 23:39:04 +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 ac33bdd031 Clang-format before editing. 2018-09-14 09:28:35 +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 5264db860d Values are more useful shown in hex. 2018-09-11 23:17:09 +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