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Commit Graph

110 Commits

Author SHA1 Message Date
Andy McFadden
32d6d849ea Tweak Merlin DS output
The default fill value is $00.  Don't specify it explicitly when we
don't have to.
2020-01-01 17:45:32 -08:00
Andy McFadden
f157fbbfd3 Add regression test for data analysis bug
The uncategorized data scanner isn't supposed to create strings or
".fill" directives that straddle labels, long comments, notes,
visualizations, or ORG directives.  The test for crossing an ORG
directive is incomplete, and doesn't correctly handle no-op ORGs
(where the new address is the same as the old address).

The code generator doesn't output ORGs that are hidden inside other
things, so we're not generating bad code, but it looks funny on
screen and may cause problems later on.  The 2004-numeric-types test
has the basic .align/.fill/.bulk directive tests, and now has an
extended set of tests for uncategorized data region splitting.
2019-12-30 14:09:18 -08:00
Andy McFadden
bef664ae7e Don't do nearby SYM-1 for zero-page values
It's pretty common for code to access BUFFER-1,X, but it's rare for
the buffer to live on zero page memory.  More often than not we're
auto-formatting zero-page operands with a nearby symbol when they're
just simple variables.  It's more confusing than useful, so we don't
do that anymore.
2019-11-23 16:27:06 -08:00
Andy McFadden
d3670c48e8 Label rework, part 6
Correct handling of local variables.  We now correctly uniquify them
with regard to non-unique labels.  Because local vars can effectively
have global scope we mostly want to treat them as global, but they're
uniquified relative to other globals very late in the process, so we
can't just throw them in the symbol table and be done.  Fortunately
local variables exist in a separate namespace, so we just need to
uniquify the variables relative to the post-localization symbol table.
In other words, we take the symbol table, apply the label map, and
rename any variable that clashes.

This also fixes an older problem where we weren't masking the
leading '_' on variable labels when generating 64tass output.

The code list now makes non-unique labels obvious, but you can't tell
the difference between unique global and unique local.  What's more,
the default type value in Edit Label is now adjusted to Global for
unique locals that were auto-generated.  To make it a bit easier to
figure out what's what, the Info panel now has a "label type" line
that reports the type.

The 2023-non-unique-labels test had some additional tests added to
exercise conflicts with local variables.  The 2019-local-variables
test output changed slightly because the de-duplicated variable
naming convention was simplified.
2019-11-18 13:36:53 -08:00
Andy McFadden
88c56616f7 Label rework, part 5
Implemented assembly source generation of non-unique local labels.
The new 2023-non-unique-labels test exercises various edge cases
(though we're still missing local variable interaction).

The format of uniquified labels changed slightly, so the expected
output of 2012-label-localizer needed to be updated.

This changes the "no opcode mnemonics" and "mask leading underscores"
functions into integrated parts of the label localization process.
2019-11-17 16:05:51 -08:00
Andy McFadden
4e08810278 Finish removal of "disable label localizer" feature
The label localizer is now always on.  The regression tests turned
it off by default, but that's no longer allowed, so the generated
output has changed for many of them.  The tests themselves were not
altered.
2019-11-16 17:15:03 -08:00
Andy McFadden
0a0208409a Tweak line folding code
Some style guides say you should only put one space between
sentences, but I and many others still put two.  The line-folding
code was only eating one of them when they straddled the end of the
line, which looked a little funny because the following line was
indented by one space.

This tweaks the code to eat both spaces.  Regression test updated.

Also, nudge some UI elements so they line up.
2019-11-01 19:47:56 -07:00
Andy McFadden
51081c5db0 Tweak "nearby" label finder
The code that found a nearby data target for an instruction operand
was searching backward but not forward.  We now take one step
forward, so that "LDA TABLE-1,Y" fills in automatically.

This altered 2008-address-changes, which had just this situation.
It didn't alter 2010-target-adjustment, but the existing tests were
insufficient and have been improved.
2019-10-29 18:12:22 -07:00
Andy McFadden
9d5f8f8049 Add a blank line between constants and addresses
In the assembler output, add a blank line between the constants
and addresses in the long list of equates.

The earlier change that corrected the BIT instruction caused test
2009-branches-and-banks to fail, because it was relying on the idea
that BIT made the carry flag indeterminate.  Changing a BCC to a
BVS restored the desired behavior.
2019-10-22 22:45:13 -07:00
Andy McFadden
b6e571afc2 Correctly handle embedded instruction edge case
This began with a change to support "BRK <operand>" in cc65.  The
assembler only supports this for 65816 projects, so we detect that
and enable it when available.

While fiddling with some test code an assertion fired.  This
revealed a minor issue in the code analyzer: when overwriting inline
data with instructions, we weren't resetting the format descriptor.

The code that exercises it, which requires two-byte BRKs and an
inline BRK handler in an extension script, has been added to test
2022-extension-scripts.

The new regression test revealed a flaw in the 64tass code
generator's character encoding scanner that caused it to hang.
Fixed.
2019-10-19 17:28:45 -07:00
Andy McFadden
cd23580cc5 Add junk/align directives
Sometimes there's a bunch of junk in the binary that isn't used for
anything.  Often it's there to make things line up at the start of
a page boundary.

This adds a ".junk" directive that tells the disassembler that it
can safely disregard the contents of a region.  If the region ends
on a power-of-two boundary, an alignment value can be specified.

The assembly source generators will output an alignment directive
when possible, a .fill directive when appropriate, and a .dense
directive when all else fails.  Because we're required to regenerate
the original data file, it's not always possible to avoid generating
a hex dump.
2019-10-18 21:00:28 -07:00
Andy McFadden
bd11aea4a4 External symbol I/O direction and address mask, part 3 (of 3)
Added regression tests.  Improved error messages.  Updated
documentation.
2019-10-16 17:32:30 -07:00
Andy McFadden
6d886ecc3a Change some EQU handling
Changed the sort order on EQU lines so that constants come before
address definitions.  This caused trivial changes to three of the
regression tests.

Added the ability to jump directly to an EQU line when an opcode
is double-clicked on.
2019-10-10 13:49:21 -07:00
Andy McFadden
dfd5bcab1b Optionally treat BRKs as two-byte instructions
Early data sheets listed BRK as one byte, but RTI after a BRK skips
the following byte, effectively making BRK a 2-byte instruction.
Sometimes, such as when diassembling Apple /// SOS code, it's handy
to treat it that way explicitly.

This change makes two-byte BRKs optional, controlled by a checkbox
in the project settings.  In the system definitions it defaults to
true for Apple ///, false for all others.

ACME doesn't allow BRK to have an arg, and cc65 only allows it for
65816 code (?), so it's emitted as a hex blob for those assemblers.
Anyone wishing to target those assemblers should stick to 1-byte mode.

Extension scripts have to switch between formatting one byte of
inline data and formatting an instruction with a one-byte operand.
A helper function has been added to the plugin Util class.

To get some regression test coverage, 2022-extension-scripts has
been configured to use two-byte BRK.

Also, added/corrected some SOS constants.

See also issue #44.
2019-10-09 14:55:56 -07:00
Andy McFadden
dc8e49e4d8 Exercise address-to-offset function in plugin
Also exercise various formatting options.

Also, fix a bug where the code that applies project/platform symbols
to numeric references was ignoring inline data items.
2019-10-07 14:21:26 -07:00
Andy McFadden
28eafef27c Expand the set of things SetInlineDataFormat accepts
Extension scripts (a/k/a "plugins") can now apply any data format
supported by FormatDescriptor to inline data.  In particular, it can
now handle variable-length inline strings.  The code analyzer
verifies the string structure (e.g. null-terminated strings have
exactly one null byte, at the very end).

Added PluginException to carry an exception back to the plugin code,
for occasions when they're doing something so wrong that we just
want to smack them.

Added test 2022-extension-scripts to exercise the feature.
2019-10-05 19:51:34 -07:00
Andy McFadden
37855c8f8e Allow explicit widths in project/platform symbols, part 4 (of 4)
Handle situation where a symbol wraps around a bank.  Updated
2021-external-symbols for that, and to test the behavior when file
data and an external symbol overlap.

The bank-wrap test turned up a bug in Merlin 32.  A workaround has
been added.

Updated documentation to explain widths.
2019-10-03 10:32:54 -07:00
Andy McFadden
0d9814d993 Allow explicit widths in project/platform symbols, part 3
Implement multi-byte project/platform symbols by filling out a table
of addresses.  Each symbol is "painted" into the table, replacing
an existing entry if the new entry has higher priority.  This allows
us to handle overlapping entries, giving boosted priority to platform
symbols that are defined in .sym65 files loaded later.

The bounds on project/platform symbols are now rigidly defined.  If
the "nearby" feature is enabled, references to SYM-1 will be picked
up, but we won't go hunting for SYM+1 unless the symbol is at least
two bytes wide.

The cost of adding a symbol to the symbol table is about the same,
but we don't have a quick way to remove a symbol.

Previously, if two platform symbols had the same value, the symbol
with the alphabetically lowest label would win.  Now, the symbol
defined in the most-recently-loaded file wins.  (If you define two
symbols with the same value in the same file, it's still resolved
alphabetically.)  This allows the user to pick the winner by
arranging the load order of the platform symbol files.

Platform symbols now keep a reference to the file ident of the
symbol file that defined them, so we can show the symbols's source
in the Info panel.

These changes altered the behavior of test 2008-address-changes,
which includes some tests on external addresses that are close to
labeled internal addresses.  The previous behavior essentially
treated user labels as being 3 bytes wide and extending outside the
file bounds, which was mildly convenient on occasion but felt a
little skanky.  (We could do with a way to define external symbols
relative to internal symbols, for things like the source address of
code that gets relocated.)

Also, re-enabled some unit tests.

Also, added a bit of identifying stuff to CrashLog.txt.
2019-10-02 16:50:15 -07:00
Andy McFadden
824add17e8 Remap labels that use opcode mnemonics
In a recent survey, three out of four cross assemblers surveyed
recommended not using opcode mnemonics to their patients who use
labels.  We now remap labels like "AND" and "jmp", using the label
map that's part of the label localizer.

We skip the step for Merlin 32, which is perfectly happy to assemble
"JMP JMP JMP".

Also, fixed a bug in MaskLeadingUnderscores that could hang the
source generator thread.
2019-09-20 15:29:34 -07:00
Andy McFadden
b74630dd5b Work around two assembler issues
Most assemblers end local label scope when a global label is
encountered.  cc65 takes this one step further by ending local label
scope when constants or variables are defined.  So, if we have a
variable table with a nonzero number of entries, we want to create
a fake global label at that point to end the scope.

Merlin 32 won't let you write " LDA #',' ".  For some reason the
comma causes an error.  IGenerator now has a "tweak operand format"
interface that lets us fix that.
2019-09-20 14:05:17 -07:00
Andy McFadden
1ddf4bed48 Fix code tracing bug
If you set things up just right, it's possible for flag status
changes to fail to get merged.

Added a regression test to 1003-flags-and-branches.

Also, tweaked the instruction operand editor to be a bit smoother
from the keyboard: added alt-key shortcuts, and put the focus on the
OK button after creating/editing a label so you can just hit the
return key twice.
2019-09-17 14:38:16 -07:00
Andy McFadden
65fc2cb86e Remove excess whitespace after cycle count comments
If a line has a comment with a cycle count and nothing else, it was
getting an extra space or two on the end.

Also, added a few end-of-line comments to the 2020 test to show how
they interact with the cycle counts.
2019-09-15 17:13:29 -07:00
Andy McFadden
88e72d1eb8 Rename regression test 2020 to reflect the CPU configuration
Cycle counting is CPU-specific.  The 2020 test exercises the
65816, but there are things unique to 6502 and 65C02 that should
also be checked if we want to be thorough.

No changes to the test itself.
2019-09-15 17:02:21 -07:00
Andy McFadden
2828cc8ca7 Apply project/platform symbols to Numeric/Address data operands
A ".dd2 <address>" item would get linked to an internal label, but
references to external addresses weren't doing the appropriate
search through the platform/project symbol list.

This change altered the output of the 2019-local-variables test.
The previous behavior was restored by disabling "nearby" symbol
matching in the project properties.

Updated the "lookup symbol by address" function to ignore local
variables.

Also, minor updates to Applesoft and F8-ROM symbol tables.
2019-09-15 14:38:12 -07:00
Andy McFadden
42e6e6df1e Add 2020-cycle-counts
A quick test to confirm that the cycle counting mechanism is
generating the correct results.
2019-09-14 18:51:03 -07:00
Andy McFadden
62b7655a1c Fix handling of data formatting that overlaps with code
If you play games with code hints you can create a data operand that
overlaps with code.  This causes problems (see issue #45).  We now
check for that situation and ignore overlapping data descriptors.

Added a regression test to 2011-hinting.
2019-09-14 11:44:17 -07:00
Andy McFadden
1631cd77f6 Check both directions for project/platform "nearby" matches
If a symbol is defined at <addr>, and we counter STA <addr>-1,Y,
we want to use the symbol in the operand.  This worked for labels
but not project/platform symbols.

Also, fixed a crash that happened if you tried to delete an auto
label.
2019-09-12 14:24:09 -07:00
Andy McFadden
14b215b76d Implement local variables for cc65
I'd apparently overlooked the ".set" directive, which seems to do
exactly what we need.
2019-09-01 18:14:39 -07:00
Andy McFadden
d542a809f8 Implement local variables for ACME
Unlike 64tass and Merlin, which allow you to redefine symbols, ACME
uses "zones" that provide scope for local variables.  This means
that, at the point of a local variable table definition, we have to
start a new zone and output the full set of active symbols, not just
the newly-defined ones.  (If you set the "clear previous" flag in
the LvTable there's no difference.)

We could do a bit better by only outputting the symbols that are
actually used within the zone, similar to what we do for global
project/platform symbols, but that's a bunch of work for questionable
benefit.
2019-09-01 10:55:19 -07:00
Andy McFadden
c698048001 Handle variable labels that are duplicates of non-variables
After thrashing around a bit, I had to choose between making the
uniquifier more complicated, or making de-duplication a separate
step.  Since I don't really expect duplicates to be a thing, I went
with the latter.

Updated the regression test.
2019-08-31 21:54:20 -07:00
Andy McFadden
963b351a52 Add 2019-local-variables test
This hits most of the edge cases, but doesn't exercise the two
duplicate name situations (var name same as user label, var name
same as project/platform symbol).

Also, fixed a bug in the EditDefSymbol uniqueness check where it
was comparing a symbol to itself.
2019-08-31 20:40:38 -07:00
Andy McFadden
32d1147eec Improve multi-encoding output in 64tass
Previously, we used the default character encoding from the project
properties to determine how strings and character constants in the
entire source file should be encoded.  Now we switch between
encodings as needed.  The default character encoding is no longer
relevant.

High ASCII is now an actual encoding, rather than acting like ASCII
that sometimes doesn't work.  Because we can do high ASCII character
operands with "| $80", we don't output a .enc to switch from ASCII
to high ASCII unless we need to generate a string.  (If we're
already in high ASCII mode, the "| $80" isn't required but won't
hurt anything.)

We now do a scan up front to see if ASCII or high ASCII is needed,
and only output the .cdefs for the encodings that are actually used.

The only gap in the matrix is high ASCII DCI strings -- the ".shift"
pseudo-op rejects text if the string doesn't start with the high
bit clear.
2019-08-21 13:46:05 -07:00
Andy McFadden
38d3adbb08 PETSCII does DCI
I didn't think it made sense, but I found something that used it,
so apparently it's a thing.  This updates the operand editor to
let you choose PETSCII+DCI, and updates the assemblers to handle
it correctly (really just 64tass, since the others either don't
have a DCI directive or don't deal with PETSCII at all).

Changed the char-encoding sample from "bad dcI" to "pet dcI", and
updated the documentation.
2019-08-20 17:55:12 -07:00
Andy McFadden
149e763821 Change the way ASCII is handled for 64tass
The documentation for 64tass says you're required to pass "--ascii"
when the source file is ASCII (as opposed to PETSCII).  We were
ignoring this, but it turns out that everything works a bit better
if we don't.

So we now pass "--ascii" on the command line, and add a two-line
character encoding definition to every file that is generated with
ASCII as the default encoding.  The sg_petscii and sg_screen
encodings go away, as PETSCII is now the default, and we can use the
built-in "screen" encoding.
2019-08-20 11:21:30 -07:00
Andy McFadden
0abea2beac Update 64tass handling of StackInt ops
The operands for BRK and COP must be expressed as immediate mode
constants, with a leading '#'.
2019-08-19 16:09:11 -07:00
Andy McFadden
037b590967 Improve ACME high ASCII handling
We can !xor a high ASCII string so long as it doesn't include any
escaped characters.
2019-08-17 17:35:01 -07:00
Andy McFadden
479be1a58e Add 2016-char-encoding-a and variations
All tests use the same data file and nearly the same project file.
The only difference is the default text encoding property setting.
For "-a" it's ASCII, for "-p" it's PETSCII, for "-s" it's C64 screen
code.  Right now this only affects the code generated for 64tass.

The test itself is a collection of strings and characters in the
supported character encodings.  How these are handled varies
significantly between assemblers.
2019-08-16 15:01:11 -07:00
Andy McFadden
8fd469b81f Correctly handle delimiters in character operands
We weren't checking to see if character operands matched their
delimiters, so bad code like "LDA #'''" was being generated.

There wasn't a test for this in 2006-operand-formats, so the test
has been updated with single and double quotes in low and high ASCII.
2019-08-14 17:31:15 -07:00
Andy McFadden
f33cd7d8a6 Replace character operand output method
The previous code output a character in single-quotes if it was
standard ASCII, double-quotes if high ASCII, or hex if it was neither
of those.  If a flag was set, high ASCII would also be output as
hex.

The new system takes the character value and an encoding identifier.
The identifier selects the character converter and delimiter
pattern, and puts the two together to generate the operand.

While doing this I realized that I could trivially support high
ASCII character arguments in all assemblers by setting the delimiter
pattern to "'#' | $80".

In FormatDescriptor, I had previously renamed the "Ascii" sub-type
"LowAscii" so it wouldn't be confused, but I dislike filling the
project file with "LowAscii" when "Ascii" is more accurate and less
confusing.  So I switched it back, and we now check the project
file version number when deciding what to do with an ASCII item.
The CharEncoding tests/converters were also renamed.

Moved the default delimiter patterns to the string table.

Widened the delimiter pattern input fields slightly.  Added a read-
only TextBox with assorted non-typewriter quotes and things so
people have something to copy text from.
2019-08-11 22:11:00 -07:00
Andy McFadden
a4f5d19295 Improve 64tass output
DCI is handled with the ".shift" pseudo-op.  The .null, .ptext,
and .shift operators all work correctly with escaped characters,
so we no longer redo those.
2019-08-09 19:13:58 -07:00
Andy McFadden
7a40d7f9bf Update expected output for test 2005-string-types
This was the result of the earlier change to eliminate "reverse DCI"
strings.  On further examination, it doesn't seem like we can do
much better than a hex dump without more work than the situation
merits.  So hex dump it is.
2019-08-09 16:41:05 -07:00
Andy McFadden
835c1c7fe2 Reverse position on '#' in block move operands
During a discussion with the cc65 developers, I became convinced that
generating "MVN $01,$02" is wrong, and "MVN #$01,#$02" is correct.
64tass, cc65, and Merlin 32 all accept this syntax; only ACME does
not.  Operands without a leading '#' should be treated as 24-bit
values, and have the bank byte extracted.

This change updates the on-screen display and assembled output to
include the '#'.  The ACME generator uses a Quirk to suppress the
hash mark.  (It doesn't currently accept values larger than 8 bits,
so there's no ambiguity.)
2019-08-08 13:02:01 -07:00
Andy McFadden
a4e90bffd1 Add 2015-64k-nops test
The test file is just 65536 NOPs.
2019-08-04 16:54:01 -07:00
Andy McFadden
d80132e941 Finish ACME v0.96.4 support
There's no easy way to make non-zero-bank 65816 code work, so I'm
punting and just generating a whole-file hex dump for those.  This
renders tests 2007 and 2009 useless, so I'm hesitant to claim that
ACME support is fully functional.
2019-08-04 14:48:42 -07:00
Andy McFadden
71badf2359 Update for cc65 v2.18
WDM <arg> now works.  MVN/MVP are still broken.  Correct code is
generated for whichever version of the assembler is configured.
Regression tests updated for new version.

Also, fixed a UI bug where manual edits to the assembler path were
being ignored.
2019-08-04 13:38:25 -07:00
Andy McFadden
98914e9f80 Treat BRK as a 1-byte instruction
The 65816 definition makes it a two-byte instruction, like COP.  On
the 6502 it acted like a two-byte instruction, but in practice very
few assemblers treat it that way.  Very few humans, for that matter.
So it's now treated as a single byte instruction, with the following
byte encoded as a data value.
2019-08-02 17:21:50 -07:00
Andy McFadden
2065f4ef9e Attempt to generate segment names for cc65
This worked, sort of.  The problem is that SourceGen will revert to
hex output in certain situations, such as a broken symbolic
reference.  There happens to be one in the ZIPPY example, and it's
on a relative branch.

The goal with the segment stuff is to allow cc65 to treat the
source as relocatable code.  In that context, a relative branch to
an absolute address doesn't make any sense, so the assembler reports
a range error.

We don't currently have a mechanism that guarantees no references
are broken (and no affordance for finding them), so we can't make
this mode the default yet.

Instead, we continue to use the generic config, but generate the
correct set of lines as comments.

(issue #39)
2018-11-18 15:11:29 -08:00
Andy McFadden
17f0faa845 Add linker config scripts to cc65 generator output
The system configuration you get with "-t none" works for smaller
files but fails for larger ones.  This updates the generator to
produce a source file and linker script pair.  (I kinda saw this
one coming -- it's why the gen/asm dialog has a combo box for the
file preview -- so it didn't require that much work.)

This currently generates a fixed script for a generic system with
64KiB of RAM, using .ORGs to set the addresses as before.

With this change, assembling a file with 65536 NOPs succeeds.

(issue #39)
2018-11-18 14:28:44 -08:00
Andy McFadden
2f74fce80b Expand set of things that work with double-click on opcode
If you double-click on the opcode of "JSR label", the code view
selection jumps to the label.  This now works for partial operands,
e.g. "LDA #<label".

Some changes to the find-label-offset code affected the cc65 "is it
a forward reference to a direct-page label" logic.  The regression
test now correctly identifies an instruction that refers to itself
as not being a forward reference.
2018-11-03 15:03:25 -07:00
Andy McFadden
a88c746419 Work around cc65 single-pass behavior
The cc65 assembler runs in a single pass, which means forward
address references default to 16 bits.  For zero-page references
we have to add an explicit width disambiguator.  (This is an
unusual situation that only occurs if you have a zero-page .ORG
in the file after code that references it.)

With this change, 2014-label-dp passes, and no other regression
tests were affected.

(issue #40)
2018-11-02 15:32:54 -07:00
Andy McFadden
c80be07f73 Work around Merlin 32 instruction parsing bug
The 2014-label-dp test now passes.  Prior regression tests are
unaffected.

Also, renamed an IGenerator interface to more accurately reflect
its role.

(issue #37)
2018-11-02 13:49:27 -07:00
Andy McFadden
50e8be186a Add 2014-label-dp
This is primarily to exercise a Merlin 32 failure (issue #37).
However, it also exercises a problem with cc65 (issue #40).
Currently, only 64tass can assemble this project.
2018-10-30 16:07:35 -07:00
Andy McFadden
a8af7e8794 Improve the "common" expression formatter
To avoid confusing the assembler, expressions with a leading
parenthesis like "(foo & $ffff) + 1" are prefixed with a "0+".  This
is not necessary if the operand begins with a '#'.

(issue #16)
2018-10-26 15:45:39 -07:00
Andy McFadden
da91f86043 Get 64tass expressions working
We now insert parenthesis as needed.  This can cause problems in
some situations, so we always prefix parenthetical expressions with
"0+", which looks goofy and is unnecessary for immediate operands.
But it does generate working source code.

Renamed the "simple" expression mode to "common", as it's not
particularly simple but is what you'd expect most assemblers to do.
(OTOH, life has been full of surprises.)

(issue #16)
2018-10-24 14:57:09 -07:00
Andy McFadden
61914c8f79 Progress toward 64tass expression support
Gave cc65 its own expression generator, as the precedence table seems
atypical if not unique.  Configured 64tass to use the "simple"
expression mode.

Added some operations on a 32-bit constant to 2007-labels-and-symbols
to exercise the current worst-case expression (shift + AND + add).
Tweaked the Merlin expression generator to handle it.

(issue #16)
2018-10-24 13:17:03 -07:00
Andy McFadden
f26a03869a Finish the underscore handling in the label localizer
Correctly handle pre-existing underscores and avoidance of
"reserved" labels.

Also, add more underscores to 2012-label-localizer to exercise
the code.

(issue #16)
2018-10-23 20:40:09 -07:00
Andy McFadden
f7e5cf2f45 Progress toward 64tass support
Most tests pass, but 2007-labels-and-symbols fails because the
expressions recognized by 64tass don't match up with either of the
other assemblers.

This is currently using a workaround for the local label syntax.
64tass uses '_' as the prefix, which is unfortunate since SourceGen
explicitly allowed underscores in labels.  (So does 64tass for that
matter, but it treats labels specially when the '_' comes first.)
We will need to rename any non-local user labels that start with '_'.

(issue #16)
2018-10-23 20:08:01 -07:00
Andy McFadden
fd6d8273a9 Add custom flag updaters for ROL/ROR
There are some useful interactions between C/N and maybe Z.  Added
a quick test to 1003-flags-and-branches.

Also, updated the 2008-address-changes tests.  Change b37d3dba
extended the nearby-target range of out-of-file symbols by one, so
one line that didn't get an operand label now does.
2018-10-09 13:15:41 -07:00
Andy McFadden
a23c7e5ab6 Rename undocumented 6502 opcodes to match Unintended Opcodes doc
These *almost* match what cc65 has, and are accepted as primary or
aliases by 64tass.

This combines the LAX and LXA operations.  LXA is the immediate
form of LAX, and behaves somewhat differently (and is unstable).
I was treating them as two separate operations with independent
mnemonics, but that doesn't seem to be the preferred way to
handle it.

The cc65 generator wasn't generating LAX before; now it does.  This
required nudging the width disambiguator, as LAX is a second
example of an instruction with both DP,Y and ABS,Y operands.

(issue #20)
2018-10-05 14:28:45 -07:00
Andy McFadden
2c6212404d Initial file commit 2018-09-28 10:05:11 -07:00