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Author SHA1 Message Date
whitequark 4922a73c5d test.compat: import tests from Migen as appropriate. 
test_signed and test_coding are adjusted slightly to account for
differences in comb propagation between the simulators; we might want
to revert that eventually.
 2019-01-26 01:01:03 +00:00
whitequark f71e0fffbb hdl.ast: fix shape calculation for *. 
This was carried over from Migen, and is wrong there too.
Counterexample: 1'sd-1 * 4'sd-4 = 4'sd-4 (but should be 5'sd4).
 2019-01-26 00:56:40 +00:00
whitequark 7b25665fde back.pysim: fix behavior of initial cycle for sync processes. 
The current behavior was introduced in 65702719, which was a wrong
fix for an issue that was actually fixed in 12e04e4e. This commit
effectively reverts 65702719 and 1782b841.
 2019-01-25 20:37:56 +00:00
whitequark 1782b841b2 lib.fifo: in FIFOInterface.read(), check readable on the right cycle. 2019-01-22 07:03:46 +00:00
whitequark eeb023a7f5 compat.genlib.fifo: adjust _FIFOInterface shim to not require fwft=. 2019-01-22 06:56:46 +00:00
whitequark 2c80f35de4 lib.fifo: fix typo in AsyncFIFO documentation. 2019-01-22 05:47:50 +00:00
whitequark e33580cf4c lib.fifo: add AsyncFIFO and AsyncFIFOBuffered. 2019-01-21 16:02:46 +00:00
whitequark 12e04e4ee5 back.pysim: wake up processes before ever committing any values. 
Otherwise, the contract of the simulator to sync processes is not
always fulfilled.
 2019-01-21 16:00:25 +00:00
whitequark 52a9f818f1 compat.genlib.cdc: add missing import. 2019-01-20 03:03:56 +00:00
whitequark c110fe6a9d compat.genlib.cdc: add GrayCounter and GrayDecoder shims. 2019-01-20 02:29:08 +00:00
whitequark b6cff2c098 lib.coding: add GrayEncoder and GrayDecoder. 
Unlike the Migen ones, these are purely combinatorial.
 2019-01-20 02:20:34 +00:00
whitequark 9757157fe2 lib.coding: add width as attribute to all coders. 2019-01-20 01:59:09 +00:00
whitequark 9de9272709 lib.fifo: use memory in the FIFO model. 
This is unfortunately more complicated, but results in a much faster
proof.
 2019-01-19 09:27:56 +00:00
whitequark 6ea0a12dd4 lib.fifo: use model equivalence to simplify formal specification. 
This is unfortunately slow, and should probably be using theory
of arrays.
 2019-01-19 09:27:56 +00:00
whitequark 38b3c4af31 hdl.ast: implement shape for modulo operator. 2019-01-19 09:27:56 +00:00
whitequark 5e2b46f727 hdl.ast: add Value.implies. 2019-01-19 08:56:44 +00:00
whitequark c5d67b0461 hdl.xfrm: mark internal registers used in lowering Sample(). 2019-01-19 07:27:32 +00:00
whitequark e3b5b2acc8 fhdl.specials: add compatibility shim for Tristate. 2019-01-19 02:20:40 +00:00
whitequark 3ed519383c lib.fifo: fix simulation read/write methods to take only one cycle. 2019-01-19 01:38:09 +00:00
whitequark 45088f7824 compat.genlib.fifo: add aliases for SyncFIFO, SyncFIFOBuffered. 2019-01-19 01:06:51 +00:00
whitequark 97b990272e lib.fifo: formally verify FIFO contract. 2019-01-19 00:52:56 +00:00
whitequark b50b47d984 hdl.ast: give Assert and Assume their own src_loc. 
This helps with patterns like `Assert(fsm.ongoing("IDLE"))`, which
would otherwise point into nMigen internals.
 2019-01-19 00:08:51 +00:00
whitequark 66466a8a0e back.rtlil: only emit each AnyConst/AnySeq cell once. 
These are semantically like signals, not like constants.
 2019-01-18 01:34:48 +00:00
Alain Péteut 60089db075 cli: add missing default for generate 2019-01-17 20:45:07 +00:00
whitequark 5a831ce31c lib.fifo: add basic formal specification. 2019-01-17 05:40:25 +00:00
whitequark fa8e876356 hdl.ast: allow sampling ClockSignal, ResetSignal. 2019-01-17 05:23:06 +00:00
whitequark 8c96675580 hdl.ast: add Past, Stable, Rose, Fell. 2019-01-17 04:31:27 +00:00
whitequark 16f90d3585 formal: extract from toplevel module. 
The nMigen formal language is about to get *much* larger and will
keep growing faster than the rest of nMigen language, so it makes
good sense to extract it. Further, this makes it easier to qualify
formal keywords like `formal.AnyConst()` without directly importing
hdl.ast.
 2019-01-17 01:43:07 +00:00
whitequark 198efcad31 hdl.xfrm: add SampleLowerer. 2019-01-17 01:41:02 +00:00
whitequark b3de114d67 hdl.ast: add Sample. 2019-01-17 01:36:27 +00:00
whitequark b78a2be9f6 lib.fifo: port sync FIFO queues from Migen. 2019-01-16 17:20:38 +00:00
whitequark cb2f18ee37 hdl.ast: fix naming of Signal.like() signals when tracer fails. 2019-01-16 17:20:38 +00:00
whitequark f2425001aa back.rtlil: slightly nicer naming for $next signals. NFC. 2019-01-16 17:20:38 +00:00
whitequark 935bf2d8cf back.rtlil: rename \sig$next to $next$sig. 
These used to serve a useful purpose being public, back when the RTLIL
backend was immature. Not anymore; now they merely clutter up views
in gtkwave and so on.
 2019-01-16 14:51:20 +00:00
whitequark 6191760c30 Unbreak 655d02d5. 2019-01-15 23:09:10 +00:00
William D. Jones 655d02d5b8 back.rtlil: Generate $anyconst and $anyseq cells. 2019-01-15 22:52:45 +00:00
William D. Jones 77728c2dea hdl.xfrm: Add on_AnyConst and on_AnySeq abstract methods for ValueVisitor and children. 2019-01-15 22:52:45 +00:00
William D. Jones 6fdbc3d885 hdl.ast: Add AnyConst and AnySeq value types. 2019-01-15 22:52:45 +00:00
whitequark c4276f7cf7 lib.io: pass pin to platform.get_tristate(). 2019-01-14 21:39:19 +00:00
whitequark b534e92dd5 hdl.ir: allow explicitly requesting flattening. 2019-01-14 17:04:23 +00:00
whitequark 6f66885c09 lib.io: lower to platform-independent tristate buffer. 2019-01-14 16:50:04 +00:00
whitequark 011bf2258e hdl: make ClockSignal and ResetSignal usable on LHS. 
Fixes #8.
 2019-01-14 15:38:16 +00:00
whitequark 664b4bcb3a hdl.dsl: cases wider than switch test value are unreachable. 
In 3083c1d6 they were erroneously fixed via truncation.
 2019-01-13 08:51:49 +00:00
whitequark 3083c1d6dd hdl.dsl: accept (but warn on) cases wider than switch test value. 
Fixes #13.
 2019-01-13 08:46:28 +00:00
whitequark cbf7bd6e31 back.pysim: handle non-driven, non-port signals. 
Fixes #20.
 2019-01-13 08:31:38 +00:00
whitequark 06faeee357 back.verilog: better error message if Yosys is not found. 
Fixes #17.
 2019-01-13 08:10:23 +00:00
whitequark 307de722cb back.verilog: remove undriven check. 
This check no longer finds bugs and is prone to false positives.
Instead, we should do integration tests on the entire stack, from
fragments to Verilog.

Fixes #23.
 2019-01-08 22:43:09 +00:00
Adam Greig 560bb007cc Give the top level scope a name to fix VCD hierarchy. 2019-01-06 00:10:37 +00:00
whitequark a2b04d71d0 hdl.ast: allow slicing [n:n] into n-bit value. 2019-01-02 18:14:57 +00:00
whitequark ef1e0b8d55 back.rtlil: translate empty slices correctly. 2019-01-02 18:14:29 +00:00