| Commit message (Collapse) | Author | Age | Files | Lines |
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Identified a number of code locations which could accept const
arguments.
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Calls to the solver used different paths. These changes unify these
calls and provide a common call for discontinuous state changes on
analog components (change_state).
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The purpose here is to make clear what is actually done and to reduce
usage of calls to update.
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The CD4016 is an analog switch IC. Document an experimental approach
to implement the analog switch as a 3 terminal element which is
completely being dealt with as part as the linear system.
The intention was to improve convergence when the switch is in a
feedback loop. One example are two-opamp tridiagonal wave generators.
Unfortunately the approach did not work out and in addition was
performing far worse than the net-separating original code.
Also updated comment in nld_generic_models.h.
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This commit introduces precompiled static solver code. Due to
additional optimizations the compiler can use because the detail
calculation steps for the solution are known e.g. the kidniki netlist
sees a 100% speed increase.
In all environments (windows/*nix/osx) the source for the static
solver code can be created using
bash src/lib/netlist/nl_create_mame_solvers.sh
This will create src/lib/netlist/generated/static_solvers.cpp which is
compiled into the mame binary.
The script is just a temporary workaround. The intention is that nltool
whill be able to create this file with one call.
There are other improvements in this commit speeding up the processing
of timestep and dynamic calculations.
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Document linearized diode model in the range exceeding maximum
dissipation. The intention is to have a faster convergence but this yet
not really is observable.
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Fix inductor calculation. Updated turkey shoot example to skip start-up
swinging of L1/C60 LC circuit. Recording now starts at 1ms.
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- Fixes performance regression and net_splitter struct.
- Fixes nltool time measurements
- pstream simplification
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Parameters are now passed to the netlist core as strings. During netlist
creation they are evaluated as functions. This opens the path to
parameters on subdevice level.
Examples:
PARAM(device.XY, (1+2*0.005))
RES(R1, 2.05*RES_K(1)+1)
In addition the commit contains dead code removal.
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- Fixed some clang lint warnings
- Removed dead code
- Experimental parser code to allow calculations in parameter value.
This already works for compiled netlists. These changes are
currently disabled. Updated pong netlist (and CRC/SHA) to work
with this new code.
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- add CD4006 and CD4070 devices
- add TL084 opamp model
- Clock now supports proxies, i.e. can be connected to
analog devices.
- Fixed netlists using CLOCK
- added some comments
- removed a forgotten header file.
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- remove pthrow trampline as proposed by Vas.
- identify throwing code by adding noexcept(false)
- move "connected term" information to setup code.
- srcclean
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Long story: The diode model uses log-stepping as proposed in "Circuit
Simulation" (Farid N. Najm) page 183. If the previous voltage was
sufficiently negative the new voltage after a log step could not have
increased enough to alter matrix and rhs vector.
This bug surfaced in stuntcyc video signal mixing which uses a diode for
the composite signal.
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- Removed DUMMY_INPUT. NC (not connected) pins should now use NC_PIN.
If a NC_PIN is actually connected, an error will be logged and
validation will fail.
- Enabled "extended" validation. This will catch now if power terminals
are not connected.
- Added const and noexcept where appropriate.
- Removed dead code.
- Fixed the 7414 Schmitt-Trigger device to use nld_power_pins
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- Devices ttlhigh and ttlhow are no longer automatically created.
- All logic input devices (e.g. TTL_INPUT, LOGIC_INPUT) now need to have
their power terminals (VCC, GND) connected. This opens the route
for more appropriate proxy devices but comes at a cost. If the
connections are omitted your circuit will not work as expected.
Example:
LOGIC_INPUT(I_SD0, 1, "AY8910PORT")
NET_C(VCC, I_SD0.VCC)
NET_C(GND, I_SD0.GND)
- Updated all netlists.
- Removed proxy information from terminal objects. This was replaced by
a lookup hash whose life-span does not exceed netlest setup.
These changes enable the removal of a number of hacks from the
source going forward.
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- fixed a code in the netlist creation which caused multiple proxies
to be created for output->terminal connections. A nice side effect of
this fix is a performance increase ~9% for kidniki and ~4% for pong.
Speaking about pong ... maximum is 490%. Dice is running at
280 FPS/60 FPS = 466%, however without any analog emulation.
- Replaced NL_NOEXCEPT with noexcept. assert is now exception-free.
- cppcheck and lint fixes.
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- move memory pool to netlist_state_t removing one static allocation.
- add memory allocation stats to verbose output
- nl_assert no longer throws, first step to remove NL_EXCEPT macro.
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- Fix automatic header generation
- clang lint fixes.
- srcclean
- remove dead code
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This commit is a first step towards using formulas in parameters, i.e.
MAINCLOCK(clock, 20 * 30)
The intention is to improve readability and scalability.
Since device registration already provides all necessary information
about parameters, the code to create an include file for all
devices has been improved. Long term, this will remove the need for
device specific header files.
In addition going forward devices will accept either no connections or
all specified connections, i.e.
TTL_7400_NAND(name, chip1.2, chip2.3)
or
TTL_7400_NAND(name)
NET_C(...)
NET_C(...)
This will allow to remove all duplicate definitions which are currently
necessary, i.e. TTL_7400_NAND/TTL_7400_GATE
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- more doxygen \file annotations
- moved MAINCLOCK back to nl_base.h
- remove some const from simple function parameters
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- comment style migration continues.
- Fixed a two bugs in the truthtable ignore inputs code
- refactored the truthtable code a bit for better readability.
- updated netlist specific gitignore.
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- switch to VS 2019 community and fix standalone build.
- more migration to C++ comment style.
- add some more doxygen markup.
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- "nltool -c docheader" now scans sources and creates
usage focussed doxy documentation for devices. Very early
stage, but works. For an example, please see ne555 source.
- Started migrating to pure C++, i.e. "//" comments.
- Various documentation fixes.
- Added cppcheck configuration to netlist/build
- Some smaller code changes.
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Still not optimal, but better than what we had previously. No exception
logging comes closer.
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- more const
- explicitly raise exceptions instead of leaving this to log.fatal()
- correct a number of cppcheck findings.
- dead code removal
- clang lint corrections, e.g. include order
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- Separate code out into pmath.h and pstonum.h.
- Fix VC build error
- optimize pfmtlog.h a bit
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Only used inconsistently in the code. May as well go.
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Both compiling the core and the shaders with __float128 now work.
The support was added to be ready to deal with academic edge cases.
Performance drops to 10% of double - thus disabled by default.
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Renamed cast member of the constants struct to magic to clearly identify
magic numbers.
Introduced nlconst struct inheriting from plib::constants<nl_fptype> to
make code better understandable.
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The newly added RELTOL and VNTOL parameters implement Newton convergence
checks comparable following other SPICE implementations.
The ACCURACY solver parameter now is only used for convergence checks in
iterative solvers.
In addition, type safety was significantly improved and a lot of "magic"
numbers are identifiable now.
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- Added new solver parameter FPTYPE. This determines in which floating
point domain the linear system is solved. May be one of "FLOAT",
"DOUBLE" or "LONGDOUBLE"
- Added option "--fperr" to nltool. This enables floating point
exceptions. This helps debugging the code under gdb.
The purpose of this going forward is to have more choice in
optimization. Non-dynamic systems should be just fine in the float
domain. Dynamic systems (i.e. diodes, bjts, mosfets) should in general
work with double. Certain edge cases may require long double resolution.
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workarounds like this necessary to fix builds (nw)
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Added ability to compile using float instead of double. Specifically the
the solver as well as the infrastructure now can have their own floating
point type. Currently this is only an academic exercise since
numerically demanding circuits like kidniki only work with double/double
support. Using float here is pushing numerical stability over the
limits.
The long term design goal is too have the matrix type (double/float)
being a parameter.
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- solver: align matrix population along the various solvers
- solver: delete dead code
- renamed nl_double to nl_fptype and use nl_fptype where previously
double has been used.
- renamed param_double_t to param_fp_t
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- Removed code no longer used
- Add noexcept where appropriate
- split pparser.[c|h] into ppreprocessor and ptokenizer
- smaller optimizations, e.g. use of std::size_t
- fix lint warnings
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