ROLLOUT 0 · amaranth-lang/amaranth
amaranth-lang__amaranth-923
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You are a principal Python software engineer resolving a repository issue in `/workspace`. Your sole objective is to produce a minimal, root-cause source patch that passes every hidden fail-to-pass and pass-to-pass regression test on the first grading run. ## Critical Environment & Grader Rules 1. **Air-Gapped Sandbox & Available CLI Tools**: No network access. Never run `pip`, `uv`, `conda`, or `git fetch`. Note: `rg` (`ripgrep`) is NOT installed in the container — always use `grep -rn --include="*.py"` for fast exact searches so you never waste a tool call on `command not found`. 2. **Protected Grading Paths**: Before running official verification, the grading harness **strips and reverts all changes** to `tests/`, `test/`, `testing/`, `test_*.py`, `*_test.py`, `conftest.py`, `pyproject.toml`, `setup.cfg`, `pytest.ini`, and `tox.ini`. Every part of your fix MUST reside in non-test production source files. 3. **Untracked File Trap (`git add -N .`)**: `submit_patch` stages ALL untracked files inside `/workspace`! Never leave reproduction or scratch files inside `/workspace` — run reproductions inline via `python3 - <<'PY'` or inside `/tmp/repro.py` in a single `run_command`. 4. **Stdout Truncation Rule**: `run_command` truncates stdout after the first 5,000 characters from the TOP. Always run pytest quietly with short tracebacks: `pytest path/to/test_file.py -k pattern -q --tb=short --no-header` If a test file is large, redirect output to `/tmp/pytest.log` and inspect `tail -n 80 /tmp/pytest.log` so failure tracebacks at the bottom are never cut off. 5. **Strict Pacing Discipline**: `get_status` and `submit_patch` are free and do NOT count toward `max_tool_calls`. Target **16-22 counted tool calls total**, and **begin your first `edit_file` change no later than tool call 15**. Reserve at least 4 calls for verification, `git status --short && git diff`, and submission. ## Execution Protocol ### Phase 1 — Pinpoint Code & Tests Immediately (1-2 tool calls) - The user message already contains `Workspace Layout` — do NOT waste a turn running `ls` on top-level directories. - Run a single compound `run_command` with `grep -rn --include="*.py"` to locate: (a) the exact symbols, error strings, or functions from the problem description, (b) **all parallel or sibling implementations** (for example sync + async variants, `Client` + `AsyncClient`, serializer + deserializer, multiple backends/dialects, base + subclass methods, `__init__.py` / `__all__` exports), and (c) the closest existing unit test files under `tests/`. ### Phase 2 — Deep Read & Spec Anchor (2-5 tool calls) - Use `read_file` with generous `start_line` and `end_line` windows (180-300 lines per call so you read whole modules in fewer calls) on the target function/class, callers, type annotations, and neighboring tests. - Before editing, verify every explicit and implicit requirement from the issue: exact parameter names, defaults, boundary/domain edge cases, exception types/messages, `None` vs empty collection vs falsy (`0`, `False`, `""`) semantics, mutability/copying, and return types. ### Phase 3 — Reproduce Bug in One Call (1 tool call) - Run ONE concise command (`python3 - <<'PY' ... PY` or targeted `pytest ... -q --tb=short --no-header`) via `run_command` to observe the exact pre-fix failure. Do NOT spend multiple tool calls writing separate reproduction scripts. ### Phase 4 — Surgical Implementation Across All Parallel Paths (1-4 tool calls) - Begin editing by tool call 15! Use `edit_file` with 4-6 lines of exact surrounding context copied from `read_file`. - Update ALL parallel codepaths (sync/async, multiple classes/dialects, type hints) consistently so partial fixes do not fail sibling tests. - **2-Strike Edit Rule**: If `edit_file` fails twice on the same block due to whitespace or escaping, do not retry `edit_file` a third time — apply an atomic Python transformation via `run_command` and immediately verify `python3 -m py_compile path/to/file.py`. ### Phase 5 — Edge-Case Verification, Diff Hygiene & Clean Exit (2-4 tool calls) - Run a single compound `run_command` testing both your reproduction + boundary edge cases (`None`, empty input, leading/trailing delimiters, subdomain/prefix boundaries, subclass/async parity) AND the relevant existing `pytest` module(s) with `-q --tb=short --no-header`. - Run `git status --short && git diff` via `run_command`. Confirm: - ZERO untracked (`??`) files in `/workspace` (`rm -f` any untracked workspace files immediately), - ZERO modifications to `tests/` or protected config files (`git checkout -- tests/` if touched), - Minimal, clean diff with valid imports and indentation. - Call `submit_patch` once verification passes, then respond with a brief 2-sentence plain-text summary and make NO further tool calls.
Task prompt 5,653 characters
You are evaluating a software engineering task for repository amaranth-lang/amaranth.
Problem Statement:
Issue with `Memory` simulation
Hi,
we are currently updating Amaranth version in Coreblocks (https://github.com/kuznia-rdzeni/coreblocks/pull/461) and unexpectedly some unit tests started to fail. Part of failing unit tests check the whole core on assembler programs. Similar tests using Cocotb and Verilator passed successfully, so I assume some problems with simulation inside Amaranth (as unit tests use amaranth tests framework). After some investigation it looks like the issue is related #893. Here is a reproduction example:
```py
class MemoryReproduce(TestCaseWithSimulator):
class DUT(Elaboratable):
def __init__(self):
pass
def elaborate(self, platform):
m = Module()
self.mem = Memory(width=8, depth=8)
m.submodules.read_port = self.read_port = self.mem.read_port()
m.submodules.write_port = self.write_port = self.mem.write_port()
return m
def test_minimal(self):
m = self.DUT()
def process():
yield m.read_port.addr.eq(1)
yield m.read_port.en.eq(1)
yield
print((yield m.read_port.data))
yield
yield m.write_port.addr.eq(2)
yield m.write_port.data.eq(14)
yield m.write_port.en.eq(1)
print((yield m.read_port.data))
yield
yield m.write_port.en.eq(0)
print((yield m.read_port.data))
yield
print((yield m.read_port.data))
yield
print((yield m.read_port.data))
with self.run_simulation(m) as sim:
sim.add_sync_process(process)
```
Output for this test case:
```
0
0
0
14
0
```
Idea is that we try to read memory from the one address and write to the other one. So we expect that writing has no impact on reading. But as you can see that is not a case in Amaranth simulation. Write cause that on read data output port there is visible written value for one cycle.
## Task Budget (Session terminates when any budget is exhausted)
- Time allowance: 7.5 minutes
- Tool calls allowance: 30 calls
- Max loop iterations: 40 turns
## Execution Environment Rules
- Single command timeout: 90 seconds (commands exceeding this fail without ending the session)
- Command output limit: 5000 characters
- File view limit: 150 lines per read_file call
- File character limit: 10000 characters per read_file call
- Environment is offline (no network/PyPI access). All repository and test dependencies are ALREADY pre-installed. Do NOT attempt to run pip install or download packages.
## Instructions:
0. All source code is under `/workspace`. Do NOT search outside `/workspace` (e.g. `/usr/`, `/wheels/`, system site-packages). If imports fail, the issue is in the source code under `/workspace`, not in missing system packages.
1. Analyze the problem statement and any provided hints carefully to identify all requested script paths, CLI subcommands, or Python modules.
2. Inspect existing codebase conventions and test files before making edits.
3. Verify your implementation using targeted tests or inline assertions before submitting.
4. Call submit_patch only after your implementation is complete and verified.
5. As your final action, you must return a text-only response reporting your completion to terminate the session.
## Workspace Layout
The repository is located at `/workspace`. Here is the directory tree (up to 3 levels):
```
./CONTRIBUTING.txt
./LICENSE.txt
./README.md
./amaranth
./amaranth/__init__.py
./amaranth/_toolchain
./amaranth/_toolchain/__init__.py
./amaranth/_toolchain/yosys.py
./amaranth/_unused.py
./amaranth/_utils.py
./amaranth/asserts.py
./amaranth/back
./amaranth/back/__init__.py
./amaranth/back/cxxrtl.py
./amaranth/back/rtlil.py
./amaranth/back/verilog.py
./amaranth/build
./amaranth/build/__init__.py
./amaranth/build/dsl.py
./amaranth/build/plat.py
./amaranth/build/res.py
./amaranth/build/run.py
./amaranth/cli.py
./amaranth/compat
./amaranth/compat/__init__.py
./amaranth/compat/fhdl
./amaranth/compat/genlib
./amaranth/compat/sim
./amaranth/hdl
./amaranth/hdl/__init__.py
./amaranth/hdl/_rec.py
./amaranth/hdl/ast.py
./amaranth/hdl/cd.py
./amaranth/hdl/dsl.py
./amaranth/hdl/ir.py
./amaranth/hdl/mem.py
./amaranth/hdl/rec.py
./amaranth/hdl/xfrm.py
./amaranth/lib
./amaranth/lib/__init__.py
./amaranth/lib/cdc.py
./amaranth/lib/coding.py
./amaranth/lib/crc
./amaranth/lib/data.py
./amaranth/lib/enum.py
./amaranth/lib/fifo.py
./amaranth/lib/io.py
./amaranth/lib/scheduler.py
./amaranth/lib/wiring.py
./amaranth/rpc.py
./amaranth/sim
./amaranth/sim/__init__.py
./amaranth/sim/_base.py
./amaranth/sim/_pyclock.py
./amaranth/sim/_pycoro.py
./amaranth/sim/_pyrtl.py
./amaranth/sim/core.py
./amaranth/sim/pysim.py
./amaranth/tracer.py
./amaranth/utils.py
./amaranth/vendor
./amaranth/vendor/__init__.py
./amaranth/vendor/_gowin.py
./amaranth/vendor/_intel.py
./amaranth/vendor/_lattice_ecp5.py
./amaranth/vendor/_lattice_ice40.py
./amaranth/vendor/_lattice_machxo_2_3l.py
./amaranth/vendor/_quicklogic.py
./amaranth/vendor/_xilinx.py
./amaranth/vendor/gowin.py
./amaranth/vendor/intel.py
./amaranth/vendor/lattice_ecp5.py
./amaranth/vendor/lattice_ice40.py
./amaranth/vendor/lattice_machxo_2_3l.py
./amaranth/vendor/quicklogic.py
./amaranth/vendor/xilinx.py
./docs
./examples
./pdm_build.py
./pyproject.toml
./tests
```
Turn 1at 92 s1,498 tokens out3,835 prompt tokens
The user is reporting an issue with `Memory` simulation in Amaranth.
Specifically, when reading from one address and writing to another, the write seems to affect the read data for one cycle, which is incorrect.
Reproduction code:
```py
class MemoryReproduce(TestCaseWithSimulator):
class DUT(Elaboratable):
def __init__(self):
pass
def elaborate(self, platform):
m = Module()
self.mem = Memory(width=8, depth=8)
m.submodules.read_port = self.read_port = self.mem.read_port()
m.submodules.write_port = self.write_port = self.mem.write_port()
return m
def test_minimal(self):
m = self.DUT()
def process():
yield m.read_port.addr.eq(1)
yield m.read_port.en.eq(1)
yield
print((yield m.read_port.data))
yield
yield m.write_port.addr.eq(2)
yield m.write_port.data.eq(14)
yield m.write_port.en.eq(1)
print((yield m.read_port.data))
yield
yield m.write_port.en.eq(0)
print((yield m.read_port.data))
yield
print((yield m.read_port.data))
yield
print((yield m.read_port.data))
with self.run_simulation(m) as sim:
sim.add_sync_process(process)
```
Expected output for `print((yield m.read_port.data))`:
The read address is 1, the write address is 2.
Initial value at 1 is 0.
Write 14 to address 2.
The read at address 1 should stay 0.
Actual output:
```
0
0
0
14
0
```
Wait, the logs show:
0 (after read_port.en.eq(1) and yield)
0 (after write_port.en.eq(1))
0 (after write_port.en.eq(0))
14 (wait, the log says 14 at the 4th print)
0 (last print)
Wait, let's re-read the log provided in the issue:
```
0
0
0
14
0
```
Let's trace the `process()`:
1. `yield m.read_port.addr.eq(1)`
2. `yield m.read_port.en.eq(1)`
3. `yield` (clock tick)
4. `print((yield m.read_port.data))` -> Expected 0, Actual 0.
5. `yield` (clock tick)
6. `yield m.write_port.addr.eq(2)`
7. `yield m.write_port.data.eq(14)`
8. `yield m.write_port.en.eq(1)`
9. `print((yield m.read_port.data))` -> Expected 0, Actual 0.
10. `yield` (clock tick)
11. `yield m.write_port.en.eq(0)`
12. `print((yield m.read_port.data))` -> Expected 0, Actual 0.
13. `yield` (clock tick)
14. `print((yield m.read_port.data))` -> Expected 0, Actual 14. (Wait, this is the 4th print)
15. `yield` (clock tick)
16. `print((yield m.read_port.data))` -> Expected 0, Actual 0. (This is the 5th print)
Let's re-examine the prints:
Print 1: `print((yield m.read_port.data))` (Line 23)
Print 2: `print((yield m.read_port.data))` (Line 28)
Print 3: `print((yield m.read_port.data))` (Line 31)
Print 4: `print((yield m.read_port.data))` (Line 33)
Print 5: `print((yield m.read_port.data))` (Line 35)
Trace:
T=0:
- `read_port.addr = 1`
- `read_port.en = 1`
T=1: (after first `yield`)
- Memory read happens. `read_port.data` becomes 0.
- `print((yield m.read_port.data))` should print 0.
T=2: (after second `yield`)
- `write_port.addr = 2`
- `write_port.data = 14`
- `write_port.en = 1`
- `read_port.en` is still 1, `read_port.addr` is still 1.
- `print((yield m.read_port.data))` should print 0.
T=3: (after third `yield`)
- Memory write happens: addr 2 = 14.
- Memory read happens: addr 1 = 0.
- `write_port.en = 0`
- `print((yield m.read_port.data))` should print 0.
T=4: (after fourth `yield`)
- Memory read happens: addr 1 = 0.
- `print((yield m.read_port.data))` should print 0. But the user says it prints 14.
T=5: (after fifth `yield`)
- Memory read happens: addr 1 = 0.
- `print((yield m.read_port.data))` should print 0.
Wait, if Print 4 is 14, and it's reading from address 1, but we wrote 14 to address 2, that's definitely wrong.
Let's look at where `Memory` is implemented.
`amaranth/hdl/mem.py` and `amaranth/sim/_pyrtl.py` (probably).
I'll start by locating the reproduction case in the codebase or creating one.
Actually, I should first look for `Memory` and how it's simulated.
TOOL CALL · run_command
{
"command": "grep -rn --include=\"*.py\" \"class Memory\" ."
}Result of run_command 177 characters
{
"status": "ok",
"stdout": "./amaranth/hdl/mem.py:12:class Memory(Elaboratable):\n./tests/test_hdl_mem.py:9:class MemoryTestCase(FHDLTestCase):\n",
"stderr": "",
"exit_code": 0
}Generated tokens 1,498 tokens · stopped: STOP
<|channel>thought
The user is reporting an issue with `Memory` simulation in Amaranth.
Specifically, when reading from one address and writing to another, the write seems to affect the read data for one cycle, which is incorrect.
Reproduction code:
```py
class MemoryReproduce(TestCaseWithSimulator):
class DUT(Elaboratable):
def __init__(self):
pass
def elaborate(self, platform):
m = Module()
self.mem = Memory(width=8, depth=8)
m.submodules.read_port = self.read_port = self.mem.read_port()
m.submodules.write_port = self.write_port = self.mem.write_port()
return m
def test_minimal(self):
m = self.DUT()
def process():
yield m.read_port.addr.eq(1)
yield m.read_port.en.eq(1)
yield
print((yield m.read_port.data))
yield
yield m.write_port.addr.eq(2)
yield m.write_port.data.eq(14)
yield m.write_port.en.eq(1)
print((yield m.read_port.data))
yield
yield m.write_port.en.eq(0)
print((yield m.read_port.data))
yield
print((yield m.read_port.data))
yield
print((yield m.read_port.data))
with self.run_simulation(m) as sim:
sim.add_sync_process(process)
```
Expected output for `print((yield m.read_port.data))`:
The read address is 1, the write address is 2.
Initial value at 1 is 0.
Write 14 to address 2.
The read at address 1 should stay 0.
Actual output:
```
0
0
0
14
0
```
Wait, the logs show:
0 (after read_port.en.eq(1) and yield)
0 (after write_port.en.eq(1))
0 (after write_port.en.eq(0))
14 (wait, the log says 14 at the 4th print)
0 (last print)
Wait, let's re-read the log provided in the issue:
```
0
0
0
14
0
```
Let's trace the `process()`:
1. `yield m.read_port.addr.eq(1)`
2. `yield m.read_port.en.eq(1)`
3. `yield` (clock tick)
4. `print((yield m.read_port.data))` -> Expected 0, Actual 0.
5. `yield` (clock tick)
6. `yield m.write_port.addr.eq(2)`
7. `yield m.write_port.data.eq(14)`
8. `yield m.write_port.en.eq(1)`
9. `print((yield m.read_port.data))` -> Expected 0, Actual 0.
10. `yield` (clock tick)
11. `yield m.write_port.en.eq(0)`
12. `print((yield m.read_port.data))` -> Expected 0, Actual 0.
13. `yield` (clock tick)
14. `print((yield m.read_port.data))` -> Expected 0, Actual 14. (Wait, this is the 4th print)
15. `yield` (clock tick)
16. `print((yield m.read_port.data))` -> Expected 0, Actual 0. (This is the 5th print)
Let's re-examine the prints:
Print 1: `print((yield m.read_port.data))` (Line 23)
Print 2: `print((yield m.read_port.data))` (Line 28)
Print 3: `print((yield m.read_port.data))` (Line 31)
Print 4: `print((yield m.read_port.data))` (Line 33)
Print 5: `print((yield m.read_port.data))` (Line 35)
Trace:
T=0:
- `read_port.addr = 1`
- `read_port.en = 1`
T=1: (after first `yield`)
- Memory read happens. `read_port.data` becomes 0.
- `print((yield m.read_port.data))` should print 0.
T=2: (after second `yield`)
- `write_port.addr = 2`
- `write_port.data = 14`
- `write_port.en = 1`
- `read_port.en` is still 1, `read_port.addr` is still 1.
- `print((yield m.read_port.data))` should print 0.
T=3: (after third `yield`)
- Memory write happens: addr 2 = 14.
- Memory read happens: addr 1 = 0.
- `write_port.en = 0`
- `print((yield m.read_port.data))` should print 0.
T=4: (after fourth `yield`)
- Memory read happens: addr 1 = 0.
- `print((yield m.read_port.data))` should print 0. But the user says it prints 14.
T=5: (after fifth `yield`)
- Memory read happens: addr 1 = 0.
- `print((yield m.read_port.data))` should print 0.
Wait, if Print 4 is 14, and it's reading from address 1, but we wrote 14 to address 2, that's definitely wrong.
Let's look at where `Memory` is implemented.
`amaranth/hdl/mem.py` and `amaranth/sim/_pyrtl.py` (probably).
I'll start by locating the reproduction case in the codebase or creating one.
Actually, I should first look for `Memory` and how it's simulated.<channel|><|tool_call>call:run_command{command:<|"|>grep -rn --include="*.py" "class Memory" .<|"|>}<tool_call|><|tool_response>
Turn 2at 96 s79 tokens out5,416 prompt tokens
Okay, `Memory` is in `amaranth/hdl/mem.py`. I also need to see how it's simulated. I'll look for "Memory" in `amaranth/sim/`.
TOOL CALL · run_command
{
"command": "grep -rn --include=\"*.py\" \"Memory\" amaranth/sim/"
}Result of run_command 127 characters
{
"status": "error",
"error_type": "CommandError",
"error_message": "",
"details": {
"stdout": "",
"stderr": "",
"exit_code": 1
}
}Generated tokens 79 tokens · stopped: STOP
Okay, `Memory` is in `amaranth/hdl/mem.py`.
I also need to see how it's simulated. I'll look for "Memory" in `amaranth/sim/`.
<channel|><|tool_call>call:run_command{command:<|"|>grep -rn --include="*.py" "Memory" amaranth/sim/<|"|>}<tool_call|><|tool_response>
Turn 3at 107 s160 tokens out5,550 prompt tokens
Wait, why did it fail? Ah, maybe it didn't match exactly "Memory". Let's try `grep -rn "Memory" amaranth/sim/`. Wait, I used `grep -rn --include="*.py" "Memory" amaranth/sim/` and it returned error? No, it returned `exit_code: 1` which means no match. Let's try searching for how `Memory`'s ports are handled in simulation. `Memory.read_port()` and `Memory.write_port()`. I'll check `amaranth/hdl/mem.py` first.
TOOL CALL · read_file
{
"filepath": "amaranth/hdl/mem.py"
}Result of read_file 5,973 characters
{
"status": "ok",
"filepath": "amaranth/hdl/mem.py",
"content": "import operator\nfrom collections import OrderedDict\n\nfrom .. import tracer\nfrom .ast import *\nfrom .ir import Elaboratable, Instance, Fragment\n\n\n__all__ = [\"Memory\", \"ReadPort\", \"WritePort\", \"DummyPort\"]\n\n\nclass Memory(Elaboratable):\n \"\"\"A word addressable storage.\n\n Parameters\n ----------\n width : int\n Access granularity. Each storage element of this memory is ``width`` bits in size.\n depth : int\n Word count. This memory contains ``depth`` storage elements.\n init : list of int\n Initial values. At power on, each storage element in this memory is initialized to\n the corresponding element of ``init``, if any, or to zero otherwise.\n Uninitialized memories are not currently supported.\n name : str\n Name hint for this memory. If ``None`` (default) the name is inferred from the variable\n name this ``Signal`` is assigned to.\n attrs : dict\n Dictionary of synthesis attributes.\n\n Attributes\n ----------\n width : int\n depth : int\n init : list of int\n attrs : dict\n \"\"\"\n def __init__(self, *, width, depth, init=None, name=None, attrs=None, simulate=True):\n if not isinstance(width, int) or width < 0:\n raise TypeError(\"Memory width must be a non-negative integer, not {!r}\"\n .format(width))\n if not isinstance(depth, int) or depth < 0:\n raise TypeError(\"Memory depth must be a non-negative integer, not {!r}\"\n .format(depth))\n\n self.name = name or tracer.get_var_name(depth=2, default=\"$memory\")\n self.src_loc = tracer.get_src_loc()\n\n self.width = width\n self.depth = depth\n self.attrs = OrderedDict(() if attrs is None else attrs)\n\n # Array of signals for simulation.\n self._array = Array()\n if simulate:\n for addr in range(self.depth):\n self._array.append(Signal(self.width, name=\"{}({})\"\n .format(name or \"memory\", addr)))\n\n self.init = init\n self._read_ports = []\n self._write_ports = []\n\n @property\n def init(self):\n return self._init\n\n @init.setter\n def init(self, new_init):\n self._init = [] if new_init is None else list(new_init)\n if len(self.init) > self.depth:\n raise ValueError(\"Memory initialization value count exceed memory depth ({} > {})\"\n .format(len(self.init), self.depth))\n\n try:\n for addr in range(len(self._array)):\n if addr < len(self._init):\n self._array[addr].reset = operator.index(self._init[addr])\n else:\n self._array[addr].reset = 0\n except TypeError as e:\n raise TypeError(\"Memory initialization value at address {:x}: {}\"\n .format(addr, e)) from None\n\n def read_port(self, *, src_loc_at=0, **kwargs):\n \"\"\"Get a read port.\n\n See :class:`ReadPort` for details.\n\n Arguments\n ---------\n domain : str\n transparent : bool\n\n Returns\n -------\n An instance of :class:`ReadPort` associated with this memory.\n \"\"\"\n return ReadPort(self, src_loc_at=1 + src_loc_at, **kwargs)\n\n def write_port(self, *, src_loc_at=0, **kwargs):\n \"\"\"Get a write port.\n\n See :class:`WritePort` for details.\n\n Arguments\n ---------\n domain : str\n granularity : int\n\n Returns\n -------\n An instance of :class:`WritePort` associated with this memory.\n \"\"\"\n return WritePort(self, src_loc_at=1 + src_loc_at, **kwargs)\n\n def __getitem__(self, index):\n \"\"\"Simulation only.\"\"\"\n return self._array[index]\n\n def elaborate(self, platform):\n init = \"\".join(format(Const(elem, unsigned(self.width)).value, f\"0{self.width}b\") for elem in reversed(self.init))\n init = Const(int(init or \"0\", 2), self.depth * self.width)\n rd_clk = []\n rd_clk_enable = 0\n rd_transparency_mask = 0\n for index, port in enumerate(self._read_ports):\n if port.domain != \"comb\":\n rd_clk.append(ClockSignal(port.domain))\n rd_clk_enable |= 1 << index\n if port.transparent:\n for write_index, write_port in enumerate(self._write_ports):\n if port.domain == write_port.domain:\n rd_transparency_mask |= 1 << (index * len(self._write_ports) + write_index)\n else:\n rd_clk.append(Const(0, 1))\n f = Instance(\"$mem_v2\",\n *((\"a\", attr, value) for attr, value in self.attrs.items()),\n p_SIZE=self.depth,\n p_OFFSET=0,\n p_ABITS=Shape.cast(range(self.depth)).width,\n p_WIDTH=self.width,\n p_INIT=init,\n p_RD_PORTS=len(self._read_ports),\n p_RD_CLK_ENABLE=Const(rd_clk_enable, len(self._read_ports)) if self._read_ports else Const(0, 1),\n p_RD_CLK_POLARITY=Const(-1, unsigned(len(self._read_ports))) if self._read_ports else Const(0, 1),\n p_RD_TRANSPARENCY_MASK=Const(rd_transparency_mask, max(1, len(self._read_ports) * len(self._write_ports))),\n p_RD_COLLISION_X_MASK=Const(0, max(1, len(self._read_ports) * len(self._write_ports))),\n p_RD_WIDE_CONTINUATION=Const(0, len(self._read_ports)) if self._read_ports else Const(0, 1),\n p_RD_CE_OVER_SRST=Const(0, len(self._read_ports)) if self._read_ports else Const(0, 1),",
"start_line": 1,
"end_line": 150,
"total_lines": 354,
"is_truncated": true
}Generated tokens 160 tokens · stopped: STOP
Wait, why did it fail? Ah, maybe it didn't match exactly "Memory". Let's try `grep -rn "Memory" amaranth/sim/`.
Wait, I used `grep -rn --include="*.py" "Memory" amaranth/sim/` and it returned error? No, it returned `exit_code: 1` which means no match.
Let's try searching for how `Memory`'s ports are handled in simulation. `Memory.read_port()` and `Memory.write_port()`.
I'll check `amaranth/hdl/mem.py` first.
<channel|><|tool_call>call:read_file{filepath:<|"|>amaranth/hdl/mem.py<|"|>}<tool_call|><|tool_response>
Turn 4at 113 s107 tokens out7,454 prompt tokens
The `Memory` class in `amaranth/hdl/mem.py` uses `self._array = Array()` where each element is a `Signal`. This `_array` is likely what's used in simulation. The `ReadPort` and `WritePort` classes are also defined in this file. Let's read them.
TOOL CALL · read_file
{
"filepath": "amaranth/hdl/mem.py",
"start_line": 151
}Result of read_file 7,018 characters
{
"status": "ok",
"filepath": "amaranth/hdl/mem.py",
"content": " p_RD_ARST_VALUE=Const(0, len(self._read_ports) * self.width),\n p_RD_SRST_VALUE=Const(0, len(self._read_ports) * self.width),\n p_RD_INIT_VALUE=Const(0, len(self._read_ports) * self.width),\n p_WR_PORTS=len(self._write_ports),\n p_WR_CLK_ENABLE=Const(-1, unsigned(len(self._write_ports))) if self._write_ports else Const(0, 1),\n p_WR_CLK_POLARITY=Const(-1, unsigned(len(self._write_ports))) if self._write_ports else Const(0, 1),\n p_WR_PRIORITY_MASK=Const(0, len(self._write_ports) * len(self._write_ports)) if self._write_ports else Const(0, 1),\n p_WR_WIDE_CONTINUATION=Const(0, len(self._write_ports)) if self._write_ports else Const(0, 1),\n i_RD_CLK=Cat(rd_clk),\n i_RD_EN=Cat(port.en for port in self._read_ports),\n i_RD_ARST=Const(0, len(self._read_ports)),\n i_RD_SRST=Const(0, len(self._read_ports)),\n i_RD_ADDR=Cat(port.addr for port in self._read_ports),\n o_RD_DATA=Cat(port.data for port in self._read_ports),\n i_WR_CLK=Cat(ClockSignal(port.domain) for port in self._write_ports),\n i_WR_EN=Cat(Cat(en_bit.replicate(port.granularity) for en_bit in port.en) for port in self._write_ports),\n i_WR_ADDR=Cat(port.addr for port in self._write_ports),\n i_WR_DATA=Cat(port.data for port in self._write_ports),\n )\n for port in self._read_ports:\n port._MustUse__used = True\n if port.domain == \"comb\":\n # Asynchronous port\n f.add_statements(port.data.eq(self._array[port.addr]))\n f.add_driver(port.data)\n else:\n # Synchronous port\n data = self._array[port.addr]\n for write_port in self._write_ports:\n if port.domain == write_port.domain and port.transparent:\n if len(write_port.en) > 1:\n parts = []\n for index, en_bit in enumerate(write_port.en):\n offset = index * write_port.granularity\n bits = slice(offset, offset + write_port.granularity)\n cond = en_bit & (port.addr == write_port.addr)\n parts.append(Mux(cond, write_port.data[bits], data[bits]))\n data = Cat(parts)\n else:\n data = Mux(write_port.en, write_port.data, data)\n f.add_statements(\n Switch(port.en, {\n 1: port.data.eq(data)\n })\n )\n f.add_driver(port.data, port.domain)\n for port in self._write_ports:\n port._MustUse__used = True\n if len(port.en) > 1:\n for index, en_bit in enumerate(port.en):\n offset = index * port.granularity\n bits = slice(offset, offset + port.granularity)\n write_data = self._array[port.addr][bits].eq(port.data[bits])\n f.add_statements(Switch(en_bit, { 1: write_data }))\n else:\n write_data = self._array[port.addr].eq(port.data)\n f.add_statements(Switch(port.en, { 1: write_data }))\n for signal in self._array:\n f.add_driver(signal, port.domain)\n return f\n\nclass ReadPort(Elaboratable):\n \"\"\"A memory read port.\n\n Parameters\n ----------\n memory : :class:`Memory`\n Memory associated with the port.\n domain : str\n Clock domain. Defaults to ``\"sync\"``. If set to ``\"comb\"``, the port is asynchronous.\n Otherwise, the read data becomes available on the next clock cycle.\n transparent : bool\n Port transparency. If set (default), a read at an address that is also being written to in\n the same clock cycle will output the new value. Otherwise, the old value will be output\n first. This behavior only applies to ports in the same domain.\n\n Attributes\n ----------\n memory : :class:`Memory`\n domain : str\n transparent : bool\n addr : Signal(range(memory.depth)), in\n Read address.\n data : Signal(memory.width), out\n Read data.\n en : Signal or Const, in\n Read enable. If asserted, ``data`` is updated with the word stored at ``addr``.\n\n Exceptions\n ----------\n Raises :exn:`ValueError` if the read port is simultaneously asynchronous and non-transparent.\n \"\"\"\n def __init__(self, memory, *, domain=\"sync\", transparent=True, src_loc_at=0):\n if domain == \"comb\" and not transparent:\n raise ValueError(\"Read port cannot be simultaneously asynchronous and non-transparent\")\n\n self.memory = memory\n self.domain = domain\n self.transparent = transparent\n\n self.addr = Signal(range(memory.depth),\n name=\"{}_r_addr\".format(memory.name), src_loc_at=1 + src_loc_at)\n self.data = Signal(memory.width,\n name=\"{}_r_data\".format(memory.name), src_loc_at=1 + src_loc_at)\n if self.domain != \"comb\":\n self.en = Signal(name=\"{}_r_en\".format(memory.name), reset=1,\n src_loc_at=1 + src_loc_at)\n else:\n self.en = Const(1)\n\n memory._read_ports.append(self)\n\n def elaborate(self, platform):\n if self is self.memory._read_ports[0]:\n return self.memory\n else:\n return Fragment()\n\n\nclass WritePort(Elaboratable):\n \"\"\"A memory write port.\n\n Parameters\n ----------\n memory : :class:`Memory`\n Memory associated with the port.\n domain : str\n Clock domain. Defaults to ``\"sync\"``. Writes have a latency of 1 clock cycle.\n granularity : int\n Port granularity. Defaults to ``memory.width``. Write data is split evenly in\n ``memory.width // granularity`` chunks, which can be updated independently.\n\n Attributes\n ----------\n memory : :class:`Memory`\n domain : str\n granularity : int\n addr : Signal(range(memory.depth)), in\n Write address.\n data : Signal(memory.width), in\n Write data.\n en : Signal(memory.width // granularity), in\n Write enable. Each bit selects a non-overlapping chunk of ``granularity`` bits on the\n ``data`` signal, which is written to memory at ``addr``. Unselected chunks are ignored.\n\n Exceptions\n ----------\n Raises :exn:`ValueError` if the write port granularity is greater than memory width, or does not\n divide memory width evenly.\n \"\"\"",
"start_line": 151,
"end_line": 300,
"total_lines": 354,
"is_truncated": true
}Generated tokens 107 tokens · stopped: STOP
The `Memory` class in `amaranth/hdl/mem.py` uses `self._array = Array()` where each element is a `Signal`.
This `_array` is likely what's used in simulation.
The `ReadPort` and `WritePort` classes are also defined in this file. Let's read them.
<channel|><|tool_call>call:read_file{filepath:<|"|>amaranth/hdl/mem.py<|"|>,start_line: 151}<tool_call|><|tool_response>
Turn 5at 116 s45 tokens out9,547 prompt tokens
And let's see the rest of `WritePort`.
TOOL CALL · read_file
{
"filepath": "amaranth/hdl/mem.py",
"start_line": 301
}Result of read_file 2,670 characters
{
"status": "ok",
"filepath": "amaranth/hdl/mem.py",
"content": " def __init__(self, memory, *, domain=\"sync\", granularity=None, src_loc_at=0):\n if granularity is None:\n granularity = memory.width\n if not isinstance(granularity, int) or granularity < 0:\n raise TypeError(\"Write port granularity must be a non-negative integer, not {!r}\"\n .format(granularity))\n if granularity > memory.width:\n raise ValueError(\"Write port granularity must not be greater than memory width \"\n \"({} > {})\"\n .format(granularity, memory.width))\n if memory.width // granularity * granularity != memory.width:\n raise ValueError(\"Write port granularity must divide memory width evenly\")\n\n self.memory = memory\n self.domain = domain\n self.granularity = granularity\n\n self.addr = Signal(range(memory.depth),\n name=\"{}_w_addr\".format(memory.name), src_loc_at=1 + src_loc_at)\n self.data = Signal(memory.width,\n name=\"{}_w_data\".format(memory.name), src_loc_at=1 + src_loc_at)\n self.en = Signal(memory.width // granularity,\n name=\"{}_w_en\".format(memory.name), src_loc_at=1 + src_loc_at)\n\n memory._write_ports.append(self)\n\n def elaborate(self, platform):\n if not self.memory._read_ports and self is self.memory._write_ports[0]:\n return self.memory\n else:\n return Fragment()\n\n\nclass DummyPort:\n \"\"\"Dummy memory port.\n\n This port can be used in place of either a read or a write port for testing and verification.\n It does not include any read/write port specific attributes, i.e. none besides ``\"domain\"``;\n any such attributes may be set manually.\n \"\"\"\n def __init__(self, *, data_width, addr_width, domain=\"sync\", name=None, granularity=None):\n self.domain = domain\n\n if granularity is None:\n granularity = data_width\n if name is None:\n name = tracer.get_var_name(depth=2, default=\"dummy\")\n\n self.addr = Signal(addr_width,\n name=\"{}_addr\".format(name), src_loc_at=1)\n self.data = Signal(data_width,\n name=\"{}_data\".format(name), src_loc_at=1)\n self.en = Signal(data_width // granularity,\n name=\"{}_en\".format(name), src_loc_at=1)",
"start_line": 301,
"end_line": 354,
"total_lines": 354,
"is_truncated": false
}Generated tokens 45 tokens · stopped: STOP
And let's see the rest of `WritePort`.
<channel|><|tool_call>call:read_file{filepath:<|"|>amaranth/hdl/mem.py<|"|>,start_line:301}<tool_call|><|tool_response>
Turn 6at 156 s728 tokens out10,331 prompt tokens
In `Memory.elaborate`, it adds statements for the read and write ports.
For the synchronous read port:
```python
data = self._array[port.addr]
for write_port in self._write_ports:
if port.domain == write_port.domain and port.transparent:
if len(write_port.en) > 1:
# ... (granularity handling)
else:
data = Mux(write_port.en, write_port.data, data)
f.add_statements(
Switch(port.en, {
1: port.data.eq(data)
})
)
f.add_driver(port.data, port.domain)
```
And for the write port:
```python
for port in self._write_ports:
port._MustUse__used = True
if len(port.en) > 1:
for index, en_bit in enumerate(port.en):
offset = index * port.granularity
bits = slice(offset, offset + port.granularity)
write_data = self._array[port.addr][bits].eq(port.data[bits])
f.add_statements(Switch(en_bit, { 1: write_data }))
else:
write_data = self._array[port.addr].eq(port.data)
f.add_statements(Switch(port.en, { 1: write_data }))
for signal in self._array:
f.add_driver(signal, port.domain)
```
Notice that `self._array[port.addr]` is used. `self._array` is an `Array` of `Signal`s.
`self._array[port.addr]` where `port.addr` is a `Signal` must be handled by the simulation engine.
Let's look at `amaranth/sim/_pyrtl.py` to see how it handles `Signal` indexing into an `Array` or how it handles `Mux` and `Switch` with `Signal` as index.
Wait, `self._array[port.addr]` is probably an indexing operation on an `Array` object.
Let's see what `Array` is. It's imported from `.ast`.
Wait, looking at `amaranth/hdl/mem.py`:
```python
from .ast import *
```
I should check `amaranth/hdl/ast.py` to see `Array`.
But more importantly, let's see how these are evaluated in `amaranth/sim/_pyrtl.py`.
Actually, let's first reproduce the bug to confirm it.
I'll create a reproduction script based on the issue description.
The issue says `TestCaseWithSimulator` is used. I need to see where it's defined.
It's likely in `amaranth/sim/pysim.py` or `amaranth/sim/core.py` or maybe in a test base class.
Let's check `amaranth/sim/pysim.py`.
TOOL CALL · read_file
{
"filepath": "amaranth/sim/pysim.py"
}Result of read_file 5,823 characters
{
"status": "ok",
"filepath": "amaranth/sim/pysim.py",
"content": "from contextlib import contextmanager\nimport itertools\nimport re\nfrom vcd import VCDWriter\nfrom vcd.gtkw import GTKWSave\n\nfrom ..hdl import *\nfrom ..hdl.ast import SignalDict\nfrom ._base import *\nfrom ._pyrtl import _FragmentCompiler\nfrom ._pycoro import PyCoroProcess\nfrom ._pyclock import PyClockProcess\n\n\n__all__ = [\"PySimEngine\"]\n\n\nclass _NameExtractor:\n def __init__(self):\n self.names = SignalDict()\n\n def __call__(self, fragment, *, hierarchy=(\"bench\", \"top\",)):\n def add_signal_name(signal):\n hierarchical_signal_name = (*hierarchy, signal.name)\n if signal not in self.names:\n self.names[signal] = {hierarchical_signal_name}\n else:\n self.names[signal].add(hierarchical_signal_name)\n\n for domain_name, domain_signals in fragment.drivers.items():\n if domain_name is not None:\n domain = fragment.domains[domain_name]\n add_signal_name(domain.clk)\n if domain.rst is not None:\n add_signal_name(domain.rst)\n\n for statement in fragment.statements:\n for signal in statement._lhs_signals() | statement._rhs_signals():\n if not isinstance(signal, (ClockSignal, ResetSignal)):\n add_signal_name(signal)\n\n for subfragment_index, (subfragment, subfragment_name) in enumerate(fragment.subfragments):\n if subfragment_name is None:\n subfragment_name = \"U${}\".format(subfragment_index)\n self(subfragment, hierarchy=(*hierarchy, subfragment_name))\n\n return self.names\n\n\nclass _VCDWriter:\n @staticmethod\n def decode_to_vcd(signal, value):\n return signal.decoder(value).expandtabs().replace(\" \", \"_\")\n\n def __init__(self, fragment, *, vcd_file, gtkw_file=None, traces=()):\n if isinstance(vcd_file, str):\n vcd_file = open(vcd_file, \"wt\")\n if isinstance(gtkw_file, str):\n gtkw_file = open(gtkw_file, \"wt\")\n\n self.vcd_vars = SignalDict()\n self.vcd_file = vcd_file\n self.vcd_writer = vcd_file and VCDWriter(self.vcd_file,\n timescale=\"1 ps\", comment=\"Generated by Amaranth\")\n\n self.gtkw_names = SignalDict()\n self.gtkw_file = gtkw_file\n self.gtkw_save = gtkw_file and GTKWSave(self.gtkw_file)\n\n self.traces = []\n\n signal_names = _NameExtractor()(fragment)\n\n trace_names = SignalDict()\n for trace in traces:\n if trace not in signal_names:\n trace_names[trace] = {('bench', trace.name)}\n self.traces.append(trace)\n\n if self.vcd_writer is None:\n return\n\n for signal, names in itertools.chain(signal_names.items(), trace_names.items()):\n if signal.decoder:\n var_type = \"string\"\n var_size = 1\n var_init = self.decode_to_vcd(signal, signal.reset)\n else:\n var_type = \"wire\"\n var_size = signal.width\n var_init = signal.reset\n\n for (*var_scope, var_name) in names:\n if re.search(r\"[ \\t\\r\\n]\", var_name):\n raise NameError(\"Signal '{}.{}' contains a whitespace character\"\n .format(\".\".join(var_scope), var_name))\n\n suffix = None\n while True:\n try:\n if suffix is None:\n var_name_suffix = var_name\n else:\n var_name_suffix = \"{}${}\".format(var_name, suffix)\n if signal not in self.vcd_vars:\n vcd_var = self.vcd_writer.register_var(\n scope=var_scope, name=var_name_suffix,\n var_type=var_type, size=var_size, init=var_init)\n self.vcd_vars[signal] = vcd_var\n else:\n self.vcd_writer.register_alias(\n scope=var_scope, name=var_name_suffix,\n var=self.vcd_vars[signal])\n break\n except KeyError:\n suffix = (suffix or 0) + 1\n\n if signal not in self.gtkw_names:\n self.gtkw_names[signal] = (*var_scope, var_name_suffix)\n\n def update(self, timestamp, signal, value):\n vcd_var = self.vcd_vars.get(signal)\n if vcd_var is None:\n return\n\n if signal.decoder:\n var_value = self.decode_to_vcd(signal, value)\n else:\n var_value = value\n self.vcd_writer.change(vcd_var, timestamp, var_value)\n\n def close(self, timestamp):\n if self.vcd_writer is not None:\n self.vcd_writer.close(timestamp)\n\n if self.gtkw_save is not None:\n self.gtkw_save.dumpfile(self.vcd_file.name)\n self.gtkw_save.dumpfile_size(self.vcd_file.tell())\n\n self.gtkw_save.treeopen(\"top\")\n for signal in self.traces:\n if len(signal) > 1 and not signal.decoder:\n suffix = \"[{}:0]\".format(len(signal) - 1)\n else:\n suffix = \"\"\n self.gtkw_save.trace(\".\".join(self.gtkw_names[signal]) + suffix)\n\n if self.vcd_file is not None:\n self.vcd_file.close()\n if self.gtkw_file is not None:",
"start_line": 1,
"end_line": 150,
"total_lines": 336,
"is_truncated": true
}Generated tokens 728 tokens · stopped: STOP
In `Memory.elaborate`, it adds statements for the read and write ports.
For the synchronous read port:
```python
data = self._array[port.addr]
for write_port in self._write_ports:
if port.domain == write_port.domain and port.transparent:
if len(write_port.en) > 1:
# ... (granularity handling)
else:
data = Mux(write_port.en, write_port.data, data)
f.add_statements(
Switch(port.en, {
1: port.data.eq(data)
})
)
f.add_driver(port.data, port.domain)
```
And for the write port:
```python
for port in self._write_ports:
port._MustUse__used = True
if len(port.en) > 1:
for index, en_bit in enumerate(port.en):
offset = index * port.granularity
bits = slice(offset, offset + port.granularity)
write_data = self._array[port.addr][bits].eq(port.data[bits])
f.add_statements(Switch(en_bit, { 1: write_data }))
else:
write_data = self._array[port.addr].eq(port.data)
f.add_statements(Switch(port.en, { 1: write_data }))
for signal in self._array:
f.add_driver(signal, port.domain)
```
Notice that `self._array[port.addr]` is used. `self._array` is an `Array` of `Signal`s.
`self._array[port.addr]` where `port.addr` is a `Signal` must be handled by the simulation engine.
Let's look at `amaranth/sim/_pyrtl.py` to see how it handles `Signal` indexing into an `Array` or how it handles `Mux` and `Switch` with `Signal` as index.
Wait, `self._array[port.addr]` is probably an indexing operation on an `Array` object.
Let's see what `Array` is. It's imported from `.ast`.
Wait, looking at `amaranth/hdl/mem.py`:
```python
from .ast import *
```
I should check `amaranth/hdl/ast.py` to see `Array`.
But more importantly, let's see how these are evaluated in `amaranth/sim/_pyrtl.py`.
Actually, let's first reproduce the bug to confirm it.
I'll create a reproduction script based on the issue description.
The issue says `TestCaseWithSimulator` is used. I need to see where it's defined.
It's likely in `amaranth/sim/pysim.py` or `amaranth/sim/core.py` or maybe in a test base class.
Let's check `amaranth/sim/pysim.py`.
<channel|><|tool_call>call:read_file{filepath:<|"|>amaranth/sim/pysim.py<|"|>}<tool_call|><|tool_response>
Turn 7at 160 s51 tokens out12,726 prompt tokens
The reproduction code uses `TestCaseWithSimulator`. Let's find where it is defined. I'll search for it.
TOOL CALL · run_command
{
"command": "grep -rn \"class TestCaseWithSimulator\" ."
}Result of run_command 127 characters
{
"status": "error",
"error_type": "CommandError",
"error_message": "",
"details": {
"stdout": "",
"stderr": "",
"exit_code": 1
}
}Generated tokens 51 tokens · stopped: STOP
The reproduction code uses `TestCaseWithSimulator`. Let's find where it is defined. I'll search for it.
<channel|><|tool_call>call:run_command{command:<|"|>grep -rn "class TestCaseWithSimulator" .<|"|>}<tool_call|><|tool_response>
Turn 8at 175 s201 tokens out12,832 prompt tokens
Wait, it's not in the codebase? Maybe it's in `tests/`? The search `grep -rn "class TestCaseWithSimulator" .` should have found it if it was anywhere. Maybe it's named differently or defined in a way that `grep` missed? Wait, the reproduction code provided in the issue is: ```py class MemoryReproduce(TestCaseWithSimulator): ``` Maybe `TestCaseWithSimulator` is just a convenience class used in their tests, and I should look for how to run simulations in Amaranth. Looking at `amaranth/sim/core.py` or `amaranth/sim/pysim.py`. The issue says "unit tests use amaranth tests framework". Let's check `tests/test_hdl_mem.py`.
TOOL CALL · read_file
{
"filepath": "tests/test_hdl_mem.py"
}Result of read_file 5,859 characters
{
"status": "ok",
"filepath": "tests/test_hdl_mem.py",
"content": "# amaranth: UnusedElaboratable=no\n\nfrom amaranth.hdl.ast import *\nfrom amaranth.hdl.mem import *\n\nfrom .utils import *\n\n\nclass MemoryTestCase(FHDLTestCase):\n def test_name(self):\n m1 = Memory(width=8, depth=4)\n self.assertEqual(m1.name, \"m1\")\n m2 = [Memory(width=8, depth=4)][0]\n self.assertEqual(m2.name, \"$memory\")\n m3 = Memory(width=8, depth=4, name=\"foo\")\n self.assertEqual(m3.name, \"foo\")\n\n def test_geometry(self):\n m = Memory(width=8, depth=4)\n self.assertEqual(m.width, 8)\n self.assertEqual(m.depth, 4)\n\n def test_geometry_wrong(self):\n with self.assertRaisesRegex(TypeError,\n r\"^Memory width must be a non-negative integer, not -1$\"):\n m = Memory(width=-1, depth=4)\n with self.assertRaisesRegex(TypeError,\n r\"^Memory depth must be a non-negative integer, not -1$\"):\n m = Memory(width=8, depth=-1)\n\n def test_init(self):\n m = Memory(width=8, depth=4, init=range(4))\n self.assertEqual(m.init, [0, 1, 2, 3])\n\n def test_init_wrong_count(self):\n with self.assertRaisesRegex(ValueError,\n r\"^Memory initialization value count exceed memory depth \\(8 > 4\\)$\"):\n m = Memory(width=8, depth=4, init=range(8))\n\n def test_init_wrong_type(self):\n with self.assertRaisesRegex(TypeError,\n (r\"^Memory initialization value at address 1: \"\n r\"'str' object cannot be interpreted as an integer$\")):\n m = Memory(width=8, depth=4, init=[1, \"0\"])\n\n def test_attrs(self):\n m1 = Memory(width=8, depth=4)\n self.assertEqual(m1.attrs, {})\n m2 = Memory(width=8, depth=4, attrs={\"ram_block\": True})\n self.assertEqual(m2.attrs, {\"ram_block\": True})\n\n def test_read_port_transparent(self):\n mem = Memory(width=8, depth=4)\n rdport = mem.read_port()\n self.assertEqual(rdport.memory, mem)\n self.assertEqual(rdport.domain, \"sync\")\n self.assertEqual(rdport.transparent, True)\n self.assertEqual(len(rdport.addr), 2)\n self.assertEqual(len(rdport.data), 8)\n self.assertEqual(len(rdport.en), 1)\n self.assertIsInstance(rdport.en, Signal)\n self.assertEqual(rdport.en.reset, 1)\n\n def test_read_port_non_transparent(self):\n mem = Memory(width=8, depth=4)\n rdport = mem.read_port(transparent=False)\n self.assertEqual(rdport.memory, mem)\n self.assertEqual(rdport.domain, \"sync\")\n self.assertEqual(rdport.transparent, False)\n self.assertEqual(len(rdport.en), 1)\n self.assertIsInstance(rdport.en, Signal)\n self.assertEqual(rdport.en.reset, 1)\n\n def test_read_port_asynchronous(self):\n mem = Memory(width=8, depth=4)\n rdport = mem.read_port(domain=\"comb\")\n self.assertEqual(rdport.memory, mem)\n self.assertEqual(rdport.domain, \"comb\")\n self.assertEqual(rdport.transparent, True)\n self.assertEqual(len(rdport.en), 1)\n self.assertIsInstance(rdport.en, Const)\n self.assertEqual(rdport.en.value, 1)\n\n def test_read_port_wrong(self):\n mem = Memory(width=8, depth=4)\n with self.assertRaisesRegex(ValueError,\n r\"^Read port cannot be simultaneously asynchronous and non-transparent$\"):\n mem.read_port(domain=\"comb\", transparent=False)\n\n def test_write_port(self):\n mem = Memory(width=8, depth=4)\n wrport = mem.write_port()\n self.assertEqual(wrport.memory, mem)\n self.assertEqual(wrport.domain, \"sync\")\n self.assertEqual(wrport.granularity, 8)\n self.assertEqual(len(wrport.addr), 2)\n self.assertEqual(len(wrport.data), 8)\n self.assertEqual(len(wrport.en), 1)\n\n def test_write_port_granularity(self):\n mem = Memory(width=8, depth=4)\n wrport = mem.write_port(granularity=2)\n self.assertEqual(wrport.memory, mem)\n self.assertEqual(wrport.domain, \"sync\")\n self.assertEqual(wrport.granularity, 2)\n self.assertEqual(len(wrport.addr), 2)\n self.assertEqual(len(wrport.data), 8)\n self.assertEqual(len(wrport.en), 4)\n\n def test_write_port_granularity_wrong(self):\n mem = Memory(width=8, depth=4)\n with self.assertRaisesRegex(TypeError,\n r\"^Write port granularity must be a non-negative integer, not -1$\"):\n mem.write_port(granularity=-1)\n with self.assertRaisesRegex(ValueError,\n r\"^Write port granularity must not be greater than memory width \\(10 > 8\\)$\"):\n mem.write_port(granularity=10)\n with self.assertRaisesRegex(ValueError,\n r\"^Write port granularity must divide memory width evenly$\"):\n mem.write_port(granularity=3)\n\n\nclass DummyPortTestCase(FHDLTestCase):\n def test_name(self):\n p1 = DummyPort(data_width=8, addr_width=2)\n self.assertEqual(p1.addr.name, \"p1_addr\")\n p2 = [DummyPort(data_width=8, addr_width=2)][0]\n self.assertEqual(p2.addr.name, \"dummy_addr\")\n p3 = DummyPort(data_width=8, addr_width=2, name=\"foo\")\n self.assertEqual(p3.addr.name, \"foo_addr\")\n\n def test_sizes(self):\n p1 = DummyPort(data_width=8, addr_width=2)\n self.assertEqual(p1.addr.width, 2)\n self.assertEqual(p1.data.width, 8)\n self.assertEqual(p1.en.width, 1)\n p2 = DummyPort(data_width=8, addr_width=2, granularity=2)\n self.assertEqual(p2.en.width, 4)",
"start_line": 1,
"end_line": 138,
"total_lines": 138,
"is_truncated": false
}Generated tokens 201 tokens · stopped: STOP
Wait, it's not in the codebase? Maybe it's in `tests/`?
The search `grep -rn "class TestCaseWithSimulator" .` should have found it if it was anywhere.
Maybe it's named differently or defined in a way that `grep` missed?
Wait, the reproduction code provided in the issue is:
```py
class MemoryReproduce(TestCaseWithSimulator):
```
Maybe `TestCaseWithSimulator` is just a convenience class used in their tests, and I should look for how to run simulations in Amaranth.
Looking at `amaranth/sim/core.py` or `amaranth/sim/pysim.py`.
The issue says "unit tests use amaranth tests framework".
Let's check `tests/test_hdl_mem.py`.
<channel|><|tool_call>call:read_file{filepath:<|"|>tests/test_hdl_mem.py<|"|>}<tool_call|><|tool_response>
Turn 9at 180 s58 tokens out14,916 prompt tokens
`MemoryTestCase` inherits from `FHDLTestCase`. Let's see where `FHDLTestCase` is defined. It's probably in `tests/utils.py`.
TOOL CALL · read_file
{
"filepath": "tests/utils.py"
}Result of read_file 2,911 characters
{
"status": "ok",
"filepath": "tests/utils.py",
"content": "import os\nimport re\nimport shutil\nimport subprocess\nimport textwrap\nimport traceback\nimport unittest\n\nfrom amaranth.hdl.ast import *\nfrom amaranth.hdl.ir import *\nfrom amaranth.back import rtlil\nfrom amaranth._toolchain import require_tool\n\n\n__all__ = [\"FHDLTestCase\"]\n\n\nclass FHDLTestCase(unittest.TestCase):\n def assertRepr(self, obj, repr_str):\n if isinstance(obj, list):\n obj = Statement.cast(obj)\n def prepare_repr(repr_str):\n repr_str = re.sub(r\"\\s+\", \" \", repr_str)\n repr_str = re.sub(r\"\\( (?=\\()\", \"(\", repr_str)\n repr_str = re.sub(r\"\\) (?=\\))\", \")\", repr_str)\n return repr_str.strip()\n self.assertEqual(prepare_repr(repr(obj)), prepare_repr(repr_str))\n\n def assertFormal(self, spec, mode=\"bmc\", depth=1):\n stack = traceback.extract_stack()\n for frame in reversed(stack):\n if os.path.dirname(__file__) not in frame.filename:\n break\n caller = frame\n\n spec_root, _ = os.path.splitext(caller.filename)\n spec_dir = os.path.dirname(spec_root)\n spec_name = \"{}_{}\".format(\n os.path.basename(spec_root).replace(\"test_\", \"spec_\"),\n caller.name.replace(\"test_\", \"\")\n )\n\n # The sby -f switch seems not fully functional when sby is reading from stdin.\n if os.path.exists(os.path.join(spec_dir, spec_name)):\n shutil.rmtree(os.path.join(spec_dir, spec_name))\n\n if mode == \"hybrid\":\n # A mix of BMC and k-induction, as per personal communication with Claire Wolf.\n script = \"setattr -unset init w:* a:amaranth.sample_reg %d\"\n mode = \"bmc\"\n else:\n script = \"\"\n\n config = textwrap.dedent(\"\"\"\\\n [options]\n mode {mode}\n depth {depth}\n wait on\n multiclock on\n\n [engines]\n smtbmc\n\n [script]\n read_ilang top.il\n prep\n {script}\n\n [file top.il]\n {rtlil}\n \"\"\").format(\n mode=mode,\n depth=depth,\n script=script,\n rtlil=rtlil.convert_fragment(Fragment.get(spec, platform=\"formal\").prepare())[0]\n )\n with subprocess.Popen(\n [require_tool(\"sby\"), \"-f\", \"-d\", spec_name],\n cwd=spec_dir, env={**os.environ, \"PYTHONWARNINGS\":\"ignore\"},\n universal_newlines=True, stdin=subprocess.PIPE, stdout=subprocess.PIPE) as proc:\n stdout, stderr = proc.communicate(config)\n if proc.returncode != 0:\n self.fail(\"Formal verification failed:\\n\" + stdout)",
"start_line": 1,
"end_line": 83,
"total_lines": 83,
"is_truncated": false
}Generated tokens 58 tokens · stopped: STOP
`MemoryTestCase` inherits from `FHDLTestCase`. Let's see where `FHDLTestCase` is defined.
It's probably in `tests/utils.py`.
<channel|><|tool_call>call:read_file{filepath:<|"|>tests/utils.py<|"|>}<tool_call|><|tool_response>
Turn 10at 235 s54 tokens out5,438 prompt tokens
`FHDLTestCase` doesn't seem to have the simulator it. Let's look for where `Simulator` is used in tests.
TOOL CALL · run_command
{
"command": "grep -rn \"Simulator(\" tests/"
}Result of run_command 1,684 characters
{
"status": "ok",
"stdout": "tests/test_lib_coding.py:31: sim = Simulator(enc)\ntests/test_lib_coding.py:58: sim = Simulator(enc)\ntests/test_lib_coding.py:81: sim = Simulator(dec)\ntests/test_lib_cdc.py:24: sim = Simulator(frag)\ntests/test_lib_cdc.py:43: sim = Simulator(frag)\ntests/test_lib_cdc.py:87: sim = Simulator(m)\ntests/test_lib_cdc.py:125: sim = Simulator(m)\ntests/test_lib_cdc.py:174: sim = Simulator(m)\ntests/test_lib_cdc.py:220: sim = Simulator(m)\ntests/test_sim.py:34: sim = Simulator(frag)\ntests/test_sim.py:415: sim = Simulator(module)\ntests/test_sim.py:473: sim = Simulator(self.m)\ntests/test_sim.py:914: sim = Simulator(m)\ntests/test_sim.py:929: Simulator(m).run()\ntests/test_sim.py:943: Simulator(m)\ntests/test_sim.py:950: Simulator(dut).run()\ntests/test_sim.py:953: sim = Simulator(Module())\ntests/test_sim.py:964: sim = Simulator(dut)\ntests/test_sim.py:980: Simulator(dut)\ntests/test_sim.py:985: sim = Simulator(dut)\ntests/test_sim.py:992: sim = Simulator(Module())\ntests/test_lib_fifo.py:307: simulator = Simulator(fifo)\ntests/test_lib_fifo.py:333: simulator = Simulator(fifo)\ntests/test_lib_scheduler.py:33: sim = Simulator(dut)\ntests/test_lib_scheduler.py:51: sim = Simulator(dut)\ntests/test_lib_data.py:814: sim = Simulator(m)\ntests/test_lib_crc.py:251: sim = Simulator(crc)\ntests/test_lib_crc.py:296: sim = Simulator(crc)\ntests/test_lib_crc.py:347: sim = Simulator(crc)\n",
"stderr": "",
"exit_code": 0
}Generated tokens 54 tokens · stopped: STOP
`FHDLTestCase` doesn't seem to have the simulator it.
Let's look for where `Simulator` is used in tests.
<channel|><|tool_call>call:run_command{command:<|"|>grep -rn "Simulator(" tests/<|"|>}<tool_call|><|tool_response>
Turn 11at 237 s47 tokens out6,135 prompt tokens
Okay, so `Simulator` is used. Let's see where `Simulator` is defined.
TOOL CALL · run_command
{
"command": "grep -rn \"class Simulator\" amaranth/sim/"
}Result of run_command 102 characters
{
"status": "ok",
"stdout": "amaranth/sim/core.py:55:class Simulator:\n",
"stderr": "",
"exit_code": 0
}Generated tokens 47 tokens · stopped: STOP
Okay, so `Simulator` is used. Let's see where `Simulator` is defined.<channel|><|tool_call>call:run_command{command:<|"|>grep -rn "class Simulator" amaranth/sim/<|"|>}<tool_call|><|tool_response>
Turn 12at 305 s1,059 tokens out6,237 prompt tokens
Now I have the `Simulator`. I can create a reproduction script.
The reported bug is that reading from address 1 while writing to address 2 results in the read port briefly outputting the value written to address 2.
Let's synthesize the reproduction script.
```python
from amaranth.hdl import *
from amaranth.sim import Simulator
class MemoryRepro(Elaboratable):
def __init__(self):
self.mem = Memory(width=8, depth=4)
self.rdport = self.mem.read_port()
self.wrport = self.mem.write_port()
def elaborate(self, platform):
return self.mem
def test_memory_repro():
dut = MemoryRepro()
sim = Simulator(dut)
# Initialize memory with some values
# We can do this via wrport
sim.concurrentev(dut.wrport.en.eq(1), dut.wrport.addr.eq(0), dut.wrport.data.eq(10))
sim.step()
sim.concurrentev(dut.wrport.en.eq(0))
sim.step()
sim.concurrentev(dut.wrport.en.eq(1), dut.wrport.addr.eq(1), dut.wrport.data.eq(20))
sim.step()
sim.concurrentev(dut.wrport.en.eq(0))
sim.step()
# Now address 0=10, address 1=20.
# We want to read address 0 while writing address 1.
# Or read address 1 while writing address 2.
# Set read port to address 0
sim.concurrentev(dut.rdport.addr.eq(0))
sim.step()
# Current value at addr 0 is 10.
# Now write to address 1 (value 30) while reading address 0.
# If the bug exists, the read port (reading addr 0) might briefly show 30.
sim.concurrentev(
dut.rdport.addr.eq(0),
dut.wrport.en.eq(1),
dut.wrport.addr.eq(1),
dut.wrport.data.eq(30),
)
# In Amaranth simulator, we might need to check values during the step.
# Let's check rdport.data.
# The issue says: "reading from address 1 while writing to address 2 results in the read port briefly outputting the value written to address 2"
# Let's follow that exactly.
# Set up: addr 1 = 11, addr 2 = 22
sim.concurrentev(dut.wrport.en.eq(1), dut.wrport.addr.eq(1), dut.wrport.data.eq(11))
sim.step()
sim.concurrentev(dut.wrport.en.eq(0))
sim.step()
sim.concurrentev(dut.wrport.en.eq(1), dut.wrport.addr.eq(2), dut.wrport.data.eq(22))
sim.step()
sim.concurrentev(dut.wrport.en.eq(0))
sim.step()
# Now read addr 1, write addr 2 with 33.
sim.concurrentev(
dut.rdport.addr.eq(1),
dut.wrport.en.eq(1),
dut.wrport.addr.eq(2),
dut.wrport.data.eq(33),
)
# Check if rdport.data == 33 (wrong) or 11 (correct)
# Since the read port is transparent by default for Memory,
# and it's in "sync" domain by default.
# Let's see.
# Actually, let's use the provided reproduction logic if possible.
# The provided reproduction logic was in a comment in the issue.
# I'll try to implement it closely.
```
Wait, I should check `amaranth/hdl/mem.py` first to see how `read_port` and `write_port` are implemented.
TOOL CALL · read_file
{
"filepath": "amaranth/hdl/mem.py"
}Result of read_file 5,973 characters
{
"status": "ok",
"filepath": "amaranth/hdl/mem.py",
"content": "import operator\nfrom collections import OrderedDict\n\nfrom .. import tracer\nfrom .ast import *\nfrom .ir import Elaboratable, Instance, Fragment\n\n\n__all__ = [\"Memory\", \"ReadPort\", \"WritePort\", \"DummyPort\"]\n\n\nclass Memory(Elaboratable):\n \"\"\"A word addressable storage.\n\n Parameters\n ----------\n width : int\n Access granularity. Each storage element of this memory is ``width`` bits in size.\n depth : int\n Word count. This memory contains ``depth`` storage elements.\n init : list of int\n Initial values. At power on, each storage element in this memory is initialized to\n the corresponding element of ``init``, if any, or to zero otherwise.\n Uninitialized memories are not currently supported.\n name : str\n Name hint for this memory. If ``None`` (default) the name is inferred from the variable\n name this ``Signal`` is assigned to.\n attrs : dict\n Dictionary of synthesis attributes.\n\n Attributes\n ----------\n width : int\n depth : int\n init : list of int\n attrs : dict\n \"\"\"\n def __init__(self, *, width, depth, init=None, name=None, attrs=None, simulate=True):\n if not isinstance(width, int) or width < 0:\n raise TypeError(\"Memory width must be a non-negative integer, not {!r}\"\n .format(width))\n if not isinstance(depth, int) or depth < 0:\n raise TypeError(\"Memory depth must be a non-negative integer, not {!r}\"\n .format(depth))\n\n self.name = name or tracer.get_var_name(depth=2, default=\"$memory\")\n self.src_loc = tracer.get_src_loc()\n\n self.width = width\n self.depth = depth\n self.attrs = OrderedDict(() if attrs is None else attrs)\n\n # Array of signals for simulation.\n self._array = Array()\n if simulate:\n for addr in range(self.depth):\n self._array.append(Signal(self.width, name=\"{}({})\"\n .format(name or \"memory\", addr)))\n\n self.init = init\n self._read_ports = []\n self._write_ports = []\n\n @property\n def init(self):\n return self._init\n\n @init.setter\n def init(self, new_init):\n self._init = [] if new_init is None else list(new_init)\n if len(self.init) > self.depth:\n raise ValueError(\"Memory initialization value count exceed memory depth ({} > {})\"\n .format(len(self.init), self.depth))\n\n try:\n for addr in range(len(self._array)):\n if addr < len(self._init):\n self._array[addr].reset = operator.index(self._init[addr])\n else:\n self._array[addr].reset = 0\n except TypeError as e:\n raise TypeError(\"Memory initialization value at address {:x}: {}\"\n .format(addr, e)) from None\n\n def read_port(self, *, src_loc_at=0, **kwargs):\n \"\"\"Get a read port.\n\n See :class:`ReadPort` for details.\n\n Arguments\n ---------\n domain : str\n transparent : bool\n\n Returns\n -------\n An instance of :class:`ReadPort` associated with this memory.\n \"\"\"\n return ReadPort(self, src_loc_at=1 + src_loc_at, **kwargs)\n\n def write_port(self, *, src_loc_at=0, **kwargs):\n \"\"\"Get a write port.\n\n See :class:`WritePort` for details.\n\n Arguments\n ---------\n domain : str\n granularity : int\n\n Returns\n -------\n An instance of :class:`WritePort` associated with this memory.\n \"\"\"\n return WritePort(self, src_loc_at=1 + src_loc_at, **kwargs)\n\n def __getitem__(self, index):\n \"\"\"Simulation only.\"\"\"\n return self._array[index]\n\n def elaborate(self, platform):\n init = \"\".join(format(Const(elem, unsigned(self.width)).value, f\"0{self.width}b\") for elem in reversed(self.init))\n init = Const(int(init or \"0\", 2), self.depth * self.width)\n rd_clk = []\n rd_clk_enable = 0\n rd_transparency_mask = 0\n for index, port in enumerate(self._read_ports):\n if port.domain != \"comb\":\n rd_clk.append(ClockSignal(port.domain))\n rd_clk_enable |= 1 << index\n if port.transparent:\n for write_index, write_port in enumerate(self._write_ports):\n if port.domain == write_port.domain:\n rd_transparency_mask |= 1 << (index * len(self._write_ports) + write_index)\n else:\n rd_clk.append(Const(0, 1))\n f = Instance(\"$mem_v2\",\n *((\"a\", attr, value) for attr, value in self.attrs.items()),\n p_SIZE=self.depth,\n p_OFFSET=0,\n p_ABITS=Shape.cast(range(self.depth)).width,\n p_WIDTH=self.width,\n p_INIT=init,\n p_RD_PORTS=len(self._read_ports),\n p_RD_CLK_ENABLE=Const(rd_clk_enable, len(self._read_ports)) if self._read_ports else Const(0, 1),\n p_RD_CLK_POLARITY=Const(-1, unsigned(len(self._read_ports))) if self._read_ports else Const(0, 1),\n p_RD_TRANSPARENCY_MASK=Const(rd_transparency_mask, max(1, len(self._read_ports) * len(self._write_ports))),\n p_RD_COLLISION_X_MASK=Const(0, max(1, len(self._read_ports) * len(self._write_ports))),\n p_RD_WIDE_CONTINUATION=Const(0, len(self._read_ports)) if self._read_ports else Const(0, 1),\n p_RD_CE_OVER_SRST=Const(0, len(self._read_ports)) if self._read_ports else Const(0, 1),",
"start_line": 1,
"end_line": 150,
"total_lines": 354,
"is_truncated": true
}Generated tokens 1,059 tokens · stopped: STOP
Now I have the `Simulator`. I can create a reproduction script.
The reported bug is that reading from address 1 while writing to address 2 results in the read port briefly outputting the value written to address 2.
Let's synthesize the reproduction script.
```python
from amaranth.hdl import *
from amaranth.sim import Simulator
class MemoryRepro(Elaboratable):
def __init__(self):
self.mem = Memory(width=8, depth=4)
self.rdport = self.mem.read_port()
self.wrport = self.mem.write_port()
def elaborate(self, platform):
return self.mem
def test_memory_repro():
dut = MemoryRepro()
sim = Simulator(dut)
# Initialize memory with some values
# We can do this via wrport
sim.concurrentev(dut.wrport.en.eq(1), dut.wrport.addr.eq(0), dut.wrport.data.eq(10))
sim.step()
sim.concurrentev(dut.wrport.en.eq(0))
sim.step()
sim.concurrentev(dut.wrport.en.eq(1), dut.wrport.addr.eq(1), dut.wrport.data.eq(20))
sim.step()
sim.concurrentev(dut.wrport.en.eq(0))
sim.step()
# Now address 0=10, address 1=20.
# We want to read address 0 while writing address 1.
# Or read address 1 while writing address 2.
# Set read port to address 0
sim.concurrentev(dut.rdport.addr.eq(0))
sim.step()
# Current value at addr 0 is 10.
# Now write to address 1 (value 30) while reading address 0.
# If the bug exists, the read port (reading addr 0) might briefly show 30.
sim.concurrentev(
dut.rdport.addr.eq(0),
dut.wrport.en.eq(1),
dut.wrport.addr.eq(1),
dut.wrport.data.eq(30),
)
# In Amaranth simulator, we might need to check values during the step.
# Let's check rdport.data.
# The issue says: "reading from address 1 while writing to address 2 results in the read port briefly outputting the value written to address 2"
# Let's follow that exactly.
# Set up: addr 1 = 11, addr 2 = 22
sim.concurrentev(dut.wrport.en.eq(1), dut.wrport.addr.eq(1), dut.wrport.data.eq(11))
sim.step()
sim.concurrentev(dut.wrport.en.eq(0))
sim.step()
sim.concurrentev(dut.wrport.en.eq(1), dut.wrport.addr.eq(2), dut.wrport.data.eq(22))
sim.step()
sim.concurrentev(dut.wrport.en.eq(0))
sim.step()
# Now read addr 1, write addr 2 with 33.
sim.concurrentev(
dut.rdport.addr.eq(1),
dut.wrport.en.eq(1),
dut.wrport.addr.eq(2),
dut.wrport.data.eq(33),
)
# Check if rdport.data == 33 (wrong) or 11 (correct)
# Since the read port is transparent by default for Memory,
# and it's in "sync" domain by default.
# Let's see.
# Actually, let's use the provided reproduction logic if possible.
# The provided reproduction logic was in a comment in the issue.
# I'll try to implement it closely.
```
Wait, I should check `amaranth/hdl/mem.py` first to see how `read_port` and `write_port` are implemented.
<channel|><|tool_call>call:read_file{filepath:<|"|>amaranth/hdl/mem.py<|"|>}<tool_call|><|tool_response>
Turn 13at 310 s81 tokens out9,040 prompt tokens
Wait, `Memory.elaborate` creates an instance of `$mem_v2`, which is likely handled by the simulator's PyRTL. Let's check `amaranth/sim/_pyrtl.py`.
TOOL CALL · run_command
{
"command": "grep -rn \"mem_v2\" amaranth/sim/_pyrtl.py"
}Result of run_command 127 characters
{
"status": "error",
"error_type": "CommandError",
"error_message": "",
"details": {
"stdout": "",
"stderr": "",
"exit_code": 1
}
}Generated tokens 81 tokens · stopped: STOP
Wait, `Memory.elaborate` creates an instance of `$mem_v2`, which is likely handled by the simulator's PyRTL.
Let's check `amaranth/sim/_pyrtl.py`.
<channel|><|tool_call>call:run_command{command:<|"|>grep -rn "mem_v2" amaranth/sim/_pyrtl.py<|"|>}<tool_call|><|tool_response>
Turn 14at 317 s81 tokens out9,176 prompt tokens
Ah, maybe it's in the simulator's PyRTL implementation as a special case for memory. Let's search for `Memory` in `amaranth/sim/_pyrtl.py`. Actually, let's list files in `amaranth/sim/`.
TOOL CALL · run_command
{
"command": "ls amaranth/sim/"
}Result of run_command 138 characters
{
"status": "ok",
"stdout": "__init__.py\n_base.py\n_pyclock.py\n_pycoro.py\n_pyrtl.py\ncore.py\npysim.py\n",
"stderr": "",
"exit_code": 0
}Generated tokens 81 tokens · stopped: STOP
Ah, maybe it's in the simulator's PyRTL implementation as a special case for memory.
Let's search for `Memory` in `amaranth/sim/_pyrtl.py`.
Actually, let's list files in `amaranth/sim/`.
<channel|><|tool_call>call:run_command{command:<|"|>ls amaranth/sim/<|"|>}<tool_call|><|tool_response>
Turn 15at 318 s42 tokens out9,339 prompt tokens
Let's check `amaranth/sim/_pyrtl.py` more carefully.
TOOL CALL · read_file
{
"filepath": "amaranth/sim/_pyrtl.py"
}Result of read_file 4,658 characters
{
"status": "ok",
"filepath": "amaranth/sim/_pyrtl.py",
"content": "import os\nimport tempfile\nfrom contextlib import contextmanager\nimport sys\n\nfrom ..hdl import *\nfrom ..hdl.ast import SignalSet\nfrom ..hdl.xfrm import ValueVisitor, StatementVisitor, LHSGroupFilter\nfrom ._base import BaseProcess\n\n\n__all__ = [\"PyRTLProcess\"]\n\n_USE_PATTERN_MATCHING = (sys.version_info >= (3, 10))\n\nclass PyRTLProcess(BaseProcess):\n __slots__ = (\"is_comb\", \"runnable\", \"passive\", \"run\")\n\n def __init__(self, *, is_comb):\n self.is_comb = is_comb\n\n self.reset()\n\n def reset(self):\n self.runnable = self.is_comb\n self.passive = True\n\n\nclass _PythonEmitter:\n def __init__(self):\n self._buffer = []\n self._suffix = 0\n self._level = 0\n\n def append(self, code):\n self._buffer.append(\" \" * self._level)\n self._buffer.append(code)\n self._buffer.append(\"\\n\")\n\n @contextmanager\n def indent(self):\n self._level += 1\n yield\n self._level -= 1\n\n def flush(self, indent=\"\"):\n code = \"\".join(self._buffer)\n self._buffer.clear()\n return code\n\n def gen_var(self, prefix):\n name = f\"{prefix}_{self._suffix}\"\n self._suffix += 1\n return name\n\n def def_var(self, prefix, value):\n name = self.gen_var(prefix)\n self.append(f\"{name} = {value}\")\n return name\n\n\nclass _Compiler:\n def __init__(self, state, emitter):\n self.state = state\n self.emitter = emitter\n\n\nclass _ValueCompiler(ValueVisitor, _Compiler):\n helpers = {\n \"sign\": lambda value, sign: value | sign if value & sign else value,\n \"zdiv\": lambda lhs, rhs: 0 if rhs == 0 else lhs // rhs,\n \"zmod\": lambda lhs, rhs: 0 if rhs == 0 else lhs % rhs,\n }\n\n def on_value(self, value):\n # Very large values are unlikely to compile or simulate in reasonable time.\n if len(value) > 2 ** 16:\n if value.src_loc:\n src = \"{}:{}\".format(*value.src_loc)\n else:\n src = \"unknown location\"\n raise OverflowError(\"Value defined at {} is {} bits wide, which is unlikely to \"\n \"simulate in reasonable time\"\n .format(src, len(value)))\n\n v = super().on_value(value)\n if isinstance(v, str) and len(v) > 1000:\n # Avoid parser stack overflow on older Pythons.\n return self.emitter.def_var(\"intermediate\", v)\n return v\n\n def on_ClockSignal(self, value):\n raise NotImplementedError # :nocov:\n\n def on_ResetSignal(self, value):\n raise NotImplementedError # :nocov:\n\n def on_AnyConst(self, value):\n raise NotImplementedError # :nocov:\n\n def on_AnySeq(self, value):\n raise NotImplementedError # :nocov:\n\n def on_Sample(self, value):\n raise NotImplementedError # :nocov:\n\n def on_Initial(self, value):\n raise NotImplementedError # :nocov:\n\n\nclass _RHSValueCompiler(_ValueCompiler):\n def __init__(self, state, emitter, *, mode, inputs=None):\n super().__init__(state, emitter)\n assert mode in (\"curr\", \"next\")\n self.mode = mode\n # If not None, `inputs` gets populated with RHS signals.\n self.inputs = inputs\n\n def on_Const(self, value):\n return f\"{value.value}\"\n\n def on_Signal(self, value):\n if self.inputs is not None:\n self.inputs.add(value)\n\n if self.mode == \"curr\":\n return f\"slots[{self.state.get_signal(value)}].{self.mode}\"\n else:\n return f\"next_{self.state.get_signal(value)}\"\n\n def on_Operator(self, value):\n def mask(value):\n value_mask = (1 << len(value)) - 1\n return f\"({value_mask:#x} & {self(value)})\"\n\n def sign(value):\n if value.shape().signed:\n return f\"sign({mask(value)}, {-1 << (len(value) - 1):#x})\"\n else: # unsigned\n return mask(value)\n\n if len(value.operands) == 1:\n arg, = value.operands\n if value.operator == \"~\":\n return f\"(~{mask(arg)})\"\n if value.operator == \"-\":\n return f\"(-{sign(arg)})\"\n if value.operator == \"b\":\n return f\"bool({mask(arg)})\"\n if value.operator == \"r|\":",
"start_line": 1,
"end_line": 150,
"total_lines": 481,
"is_truncated": true
}Generated tokens 42 tokens · stopped: STOP
Let's check `amaranth/sim/_pyrtl.py` more carefully.<channel|><|tool_call>call:read_file{filepath:<|"|>amaranth/sim/_pyrtl.py<|"|>}<tool_call|><|tool_response>
Turn 16at 325 s96 tokens out10,811 prompt tokens
The `_pyrtl.py` file seems to be a compiler that generates Python code for simulation. Wait, I see `Core` and `Simulator` in `amaranth/sim/core.py`. Maybe that's where the simulation loop and memory handling are. Let's read `amaranth/sim/core.py`.
TOOL CALL · read_file
{
"filepath": "amaranth/sim/core.py"
}Result of read_file 5,948 characters
{
"status": "ok",
"filepath": "amaranth/sim/core.py",
"content": "import inspect\nimport warnings\n\nfrom .._utils import deprecated\nfrom ..hdl.cd import *\nfrom ..hdl.ir import *\nfrom ._base import BaseEngine\n\n\n__all__ = [\"Settle\", \"Delay\", \"Tick\", \"Passive\", \"Active\", \"Simulator\"]\n\n\nclass Command:\n pass\n\n\nclass Settle(Command):\n def __repr__(self):\n return \"(settle)\"\n\n\nclass Delay(Command):\n def __init__(self, interval=None):\n self.interval = None if interval is None else float(interval)\n\n def __repr__(self):\n if self.interval is None:\n return \"(delay ε)\"\n else:\n return \"(delay {:.3}us)\".format(self.interval * 1e6)\n\n\nclass Tick(Command):\n def __init__(self, domain=\"sync\"):\n if not isinstance(domain, (str, ClockDomain)):\n raise TypeError(\"Domain must be a string or a ClockDomain instance, not {!r}\"\n .format(domain))\n assert domain != \"comb\"\n self.domain = domain\n\n def __repr__(self):\n return \"(tick {})\".format(self.domain)\n\n\nclass Passive(Command):\n def __repr__(self):\n return \"(passive)\"\n\n\nclass Active(Command):\n def __repr__(self):\n return \"(active)\"\n\n\nclass Simulator:\n def __init__(self, fragment, *, engine=\"pysim\"):\n if isinstance(engine, type) and issubclass(engine, BaseEngine):\n pass\n elif engine == \"pysim\":\n from .pysim import PySimEngine\n engine = PySimEngine\n else:\n raise TypeError(\"Value '{!r}' is not a simulation engine class or \"\n \"a simulation engine name\"\n .format(engine))\n\n self._fragment = Fragment.get(fragment, platform=None).prepare()\n self._engine = engine(self._fragment)\n self._clocked = set()\n\n def _check_process(self, process):\n if not (inspect.isgeneratorfunction(process) or inspect.iscoroutinefunction(process)):\n raise TypeError(\"Cannot add a process {!r} because it is not a generator function\"\n .format(process))\n return process\n\n def add_process(self, process):\n process = self._check_process(process)\n def wrapper():\n # Only start a bench process after comb settling, so that the reset values are correct.\n yield Settle()\n yield from process()\n self._engine.add_coroutine_process(wrapper, default_cmd=None)\n\n def add_sync_process(self, process, *, domain=\"sync\"):\n process = self._check_process(process)\n def wrapper():\n # Only start a sync process after the first clock edge (or reset edge, if the domain\n # uses an asynchronous reset). This matches the behavior of synchronous FFs.\n yield Tick(domain)\n yield from process()\n self._engine.add_coroutine_process(wrapper, default_cmd=Tick(domain))\n\n def add_clock(self, period, *, phase=None, domain=\"sync\", if_exists=False):\n \"\"\"Add a clock process.\n\n Adds a process that drives the clock signal of ``domain`` at a 50% duty cycle.\n\n Arguments\n ---------\n period : float\n Clock period. The process will toggle the ``domain`` clock signal every ``period / 2``\n seconds.\n phase : None or float\n Clock phase. The process will wait ``phase`` seconds before the first clock transition.\n If not specified, defaults to ``period / 2``.\n domain : str or ClockDomain\n Driven clock domain. If specified as a string, the domain with that name is looked up\n in the root fragment of the simulation.\n if_exists : bool\n If ``False`` (the default), raise an error if the driven domain is specified as\n a string and the root fragment does not have such a domain. If ``True``, do nothing\n in this case.\n \"\"\"\n if isinstance(domain, ClockDomain):\n if (domain.name in self._fragment.domains and\n domain is not self._fragment.domains[domain.name]):\n warnings.warn(\"Adding a clock process that drives a clock domain object \"\n \"named {!r}, which is distinct from an identically named domain \"\n \"in the simulated design\"\n .format(domain.name),\n UserWarning, stacklevel=2)\n elif domain in self._fragment.domains:\n domain = self._fragment.domains[domain]\n elif if_exists:\n return\n else:\n raise ValueError(\"Domain {!r} is not present in simulation\"\n .format(domain))\n if domain in self._clocked:\n raise ValueError(\"Domain {!r} already has a clock driving it\"\n .format(domain.name))\n \n # We represent times internally in 1 ps units, but users supply float quantities of seconds\n period = int(period * 1e12)\n\n if phase is None:\n # By default, delay the first edge by half period. This causes any synchronous activity\n # to happen at a non-zero time, distinguishing it from the reset values in the waveform\n # viewer.\n phase = period // 2\n else:\n phase = int(phase * 1e12) + period // 2\n self._engine.add_clock_process(domain.clk, phase=phase, period=period)\n self._clocked.add(domain)\n\n def reset(self):\n \"\"\"Reset the simulation.\n\n Assign the reset value to every signal in the simulation, and restart every user process.",
"start_line": 1,
"end_line": 150,
"total_lines": 215,
"is_truncated": true
}Generated tokens 96 tokens · stopped: STOP
The `_pyrtl.py` file seems to be a compiler that generates Python code for simulation.
Wait, I see `Core` and `Simulator` in `amaranth/sim/core.py`. Maybe that's where the simulation loop and memory handling are.
Let's read `amaranth/sim/core.py`.
<channel|><|tool_call>call:read_file{filepath:<|"|>amaranth/sim/core.py<|"|>}<tool_call|><|tool_response>
Turn 17at 328 s55 tokens out12,430 prompt tokens
`Simulator` uses `PySimEngine` by default. Let's look at `amaranth/sim/pysim.py`.
TOOL CALL · read_file
{
"filepath": "amaranth/sim/pysim.py"
}Result of read_file 5,823 characters
{
"status": "ok",
"filepath": "amaranth/sim/pysim.py",
"content": "from contextlib import contextmanager\nimport itertools\nimport re\nfrom vcd import VCDWriter\nfrom vcd.gtkw import GTKWSave\n\nfrom ..hdl import *\nfrom ..hdl.ast import SignalDict\nfrom ._base import *\nfrom ._pyrtl import _FragmentCompiler\nfrom ._pycoro import PyCoroProcess\nfrom ._pyclock import PyClockProcess\n\n\n__all__ = [\"PySimEngine\"]\n\n\nclass _NameExtractor:\n def __init__(self):\n self.names = SignalDict()\n\n def __call__(self, fragment, *, hierarchy=(\"bench\", \"top\",)):\n def add_signal_name(signal):\n hierarchical_signal_name = (*hierarchy, signal.name)\n if signal not in self.names:\n self.names[signal] = {hierarchical_signal_name}\n else:\n self.names[signal].add(hierarchical_signal_name)\n\n for domain_name, domain_signals in fragment.drivers.items():\n if domain_name is not None:\n domain = fragment.domains[domain_name]\n add_signal_name(domain.clk)\n if domain.rst is not None:\n add_signal_name(domain.rst)\n\n for statement in fragment.statements:\n for signal in statement._lhs_signals() | statement._rhs_signals():\n if not isinstance(signal, (ClockSignal, ResetSignal)):\n add_signal_name(signal)\n\n for subfragment_index, (subfragment, subfragment_name) in enumerate(fragment.subfragments):\n if subfragment_name is None:\n subfragment_name = \"U${}\".format(subfragment_index)\n self(subfragment, hierarchy=(*hierarchy, subfragment_name))\n\n return self.names\n\n\nclass _VCDWriter:\n @staticmethod\n def decode_to_vcd(signal, value):\n return signal.decoder(value).expandtabs().replace(\" \", \"_\")\n\n def __init__(self, fragment, *, vcd_file, gtkw_file=None, traces=()):\n if isinstance(vcd_file, str):\n vcd_file = open(vcd_file, \"wt\")\n if isinstance(gtkw_file, str):\n gtkw_file = open(gtkw_file, \"wt\")\n\n self.vcd_vars = SignalDict()\n self.vcd_file = vcd_file\n self.vcd_writer = vcd_file and VCDWriter(self.vcd_file,\n timescale=\"1 ps\", comment=\"Generated by Amaranth\")\n\n self.gtkw_names = SignalDict()\n self.gtkw_file = gtkw_file\n self.gtkw_save = gtkw_file and GTKWSave(self.gtkw_file)\n\n self.traces = []\n\n signal_names = _NameExtractor()(fragment)\n\n trace_names = SignalDict()\n for trace in traces:\n if trace not in signal_names:\n trace_names[trace] = {('bench', trace.name)}\n self.traces.append(trace)\n\n if self.vcd_writer is None:\n return\n\n for signal, names in itertools.chain(signal_names.items(), trace_names.items()):\n if signal.decoder:\n var_type = \"string\"\n var_size = 1\n var_init = self.decode_to_vcd(signal, signal.reset)\n else:\n var_type = \"wire\"\n var_size = signal.width\n var_init = signal.reset\n\n for (*var_scope, var_name) in names:\n if re.search(r\"[ \\t\\r\\n]\", var_name):\n raise NameError(\"Signal '{}.{}' contains a whitespace character\"\n .format(\".\".join(var_scope), var_name))\n\n suffix = None\n while True:\n try:\n if suffix is None:\n var_name_suffix = var_name\n else:\n var_name_suffix = \"{}${}\".format(var_name, suffix)\n if signal not in self.vcd_vars:\n vcd_var = self.vcd_writer.register_var(\n scope=var_scope, name=var_name_suffix,\n var_type=var_type, size=var_size, init=var_init)\n self.vcd_vars[signal] = vcd_var\n else:\n self.vcd_writer.register_alias(\n scope=var_scope, name=var_name_suffix,\n var=self.vcd_vars[signal])\n break\n except KeyError:\n suffix = (suffix or 0) + 1\n\n if signal not in self.gtkw_names:\n self.gtkw_names[signal] = (*var_scope, var_name_suffix)\n\n def update(self, timestamp, signal, value):\n vcd_var = self.vcd_vars.get(signal)\n if vcd_var is None:\n return\n\n if signal.decoder:\n var_value = self.decode_to_vcd(signal, value)\n else:\n var_value = value\n self.vcd_writer.change(vcd_var, timestamp, var_value)\n\n def close(self, timestamp):\n if self.vcd_writer is not None:\n self.vcd_writer.close(timestamp)\n\n if self.gtkw_save is not None:\n self.gtkw_save.dumpfile(self.vcd_file.name)\n self.gtkw_save.dumpfile_size(self.vcd_file.tell())\n\n self.gtkw_save.treeopen(\"top\")\n for signal in self.traces:\n if len(signal) > 1 and not signal.decoder:\n suffix = \"[{}:0]\".format(len(signal) - 1)\n else:\n suffix = \"\"\n self.gtkw_save.trace(\".\".join(self.gtkw_names[signal]) + suffix)\n\n if self.vcd_file is not None:\n self.vcd_file.close()\n if self.gtkw_file is not None:",
"start_line": 1,
"end_line": 150,
"total_lines": 336,
"is_truncated": true
}Generated tokens 55 tokens · stopped: STOP
`Simulator` uses `PySimEngine` by default. Let's look at `amaranth/sim/pysim.py`.
<channel|><|tool_call>call:read_file{filepath:<|"|>amaranth/sim/pysim.py<|"|>}<tool_call|><|tool_response>
Turn 18at 332 s64 tokens out14,152 prompt tokens
Still no `Memory` handling in `pysim.py`. Let's look at the end of `pysim.py`.
TOOL CALL · read_file
{
"filepath": "amaranth/sim/pysim.py",
"start_line": 200
}Result of read_file 4,807 characters
{
"status": "ok",
"filepath": "amaranth/sim/pysim.py",
"content": "\n\nclass _PySignalState(BaseSignalState):\n __slots__ = (\"signal\", \"curr\", \"next\", \"waiters\", \"pending\")\n\n def __init__(self, signal, pending):\n self.signal = signal\n self.pending = pending\n self.waiters = dict()\n self.curr = self.next = signal.reset\n\n def set(self, value):\n if self.next == value:\n return\n self.next = value\n self.pending.add(self)\n\n def commit(self):\n if self.curr == self.next:\n return False\n self.curr = self.next\n\n awoken_any = False\n for process, trigger in self.waiters.items():\n if trigger is None or trigger == self.curr:\n process.runnable = awoken_any = True\n return awoken_any\n\n\nclass _PySimulation(BaseSimulation):\n def __init__(self):\n self.timeline = _Timeline()\n self.signals = SignalDict()\n self.slots = []\n self.pending = set()\n\n def reset(self):\n self.timeline.reset()\n for signal, index in self.signals.items():\n self.slots[index].curr = self.slots[index].next = signal.reset\n self.pending.clear()\n\n def get_signal(self, signal):\n try:\n return self.signals[signal]\n except KeyError:\n index = len(self.slots)\n self.slots.append(_PySignalState(signal, self.pending))\n self.signals[signal] = index\n return index\n\n def add_trigger(self, process, signal, *, trigger=None):\n index = self.get_signal(signal)\n assert (process not in self.slots[index].waiters or\n self.slots[index].waiters[process] == trigger)\n self.slots[index].waiters[process] = trigger\n\n def remove_trigger(self, process, signal):\n index = self.get_signal(signal)\n assert process in self.slots[index].waiters\n del self.slots[index].waiters[process]\n\n def wait_interval(self, process, interval):\n self.timeline.delay(interval, process)\n\n def commit(self, changed=None):\n converged = True\n for signal_state in self.pending:\n if signal_state.commit():\n converged = False\n if changed is not None:\n changed.update(self.pending)\n self.pending.clear()\n return converged\n\n\nclass PySimEngine(BaseEngine):\n def __init__(self, fragment):\n self._state = _PySimulation()\n self._timeline = self._state.timeline\n\n self._fragment = fragment\n self._processes = _FragmentCompiler(self._state)(self._fragment)\n self._vcd_writers = []\n\n def add_coroutine_process(self, process, *, default_cmd):\n self._processes.add(PyCoroProcess(self._state, self._fragment.domains, process,\n default_cmd=default_cmd))\n\n def add_clock_process(self, clock, *, phase, period):\n self._processes.add(PyClockProcess(self._state, clock,\n phase=phase, period=period))\n\n def reset(self):\n self._state.reset()\n for process in self._processes:\n process.reset()\n\n def _step(self):\n changed = set() if self._vcd_writers else None\n\n # Performs the two phases of a delta cycle in a loop:\n converged = False\n while not converged:\n # 1. eval: run and suspend every non-waiting process once, queueing signal changes\n for process in self._processes:\n if process.runnable:\n process.runnable = False\n process.run()\n\n # 2. commit: apply every queued signal change, waking up any waiting processes\n converged = self._state.commit(changed)\n\n for vcd_writer in self._vcd_writers:\n for signal_state in changed:\n vcd_writer.update(self._timeline.now,\n signal_state.signal, signal_state.curr)\n\n def advance(self):\n self._step()\n self._timeline.advance()\n return any(not process.passive for process in self._processes)\n\n @property\n def now(self):\n return self._timeline.now\n\n @contextmanager\n def write_vcd(self, *, vcd_file, gtkw_file, traces):\n vcd_writer = _VCDWriter(self._fragment,\n vcd_file=vcd_file, gtkw_file=gtkw_file, traces=traces)\n try:\n self._vcd_writers.append(vcd_writer)\n yield\n finally:\n vcd_writer.close(self._timeline.now)\n self._vcd_writers.remove(vcd_writer)",
"start_line": 200,
"end_line": 336,
"total_lines": 336,
"is_truncated": false
}Generated tokens 64 tokens · stopped: STOP
Still no `Memory` handling in `pysim.py`.
Let's look at the end of `pysim.py`.
<channel|><|tool_call>call:read_file{filepath:<|"|>amaranth/sim/pysim.py<|"|>,start_line:200}<tool_call|><|tool_response>
Turn 19at 338 s84 tokens out15,573 prompt tokens
Okay, so the simulation is handled by `PySimEngine`, which uses `_FragmentCompiler(self._state)(self._fragment)`. Let's look at `_FragmentCompiler` in `amaranth/sim/_pyrtl.py`.
TOOL CALL · read_file
{
"filepath": "amaranth/sim/_pyrtl.py",
"start_line": 482
}Result of read_file 137 characters
{
"status": "error",
"error_type": "ValueError",
"error_message": "start_line (482) cannot be greater than end_line (481)",
"details": {}
}Generated tokens 84 tokens · stopped: STOP
Okay, so the simulation is handled by `PySimEngine`, which uses `_FragmentCompiler(self._state)(self._fragment)`.
Let's look at `_FragmentCompiler` in `amaranth/sim/_pyrtl.py`.<channel|><|tool_call>call:read_file{filepath:<|"|>amaranth/sim/_pyrtl.py<|"|>,start_line:482}<tool_call|><|tool_response>
Turn 20at 390 s91 tokens out5,638 prompt tokens
My mistake, I didn't check the file size. Let's read the whole `amaranth/sim/_pyrtl.py` or at least the end of it. Wait, let's find where `Memory` is handled in `amaranth/sim/_pyrtl.py`.
TOOL CALL · run_command
{
"command": "grep -n \"Memory\" amaranth/sim/_pyrtl.py"
}Result of run_command 241 characters
{
"status": "error",
"error_type": "CommandError",
"error_message": "",
"details": {
"stdout": "",
"stderr": "",
"exit_code": 1
},
"budget_warning": "Only 10 tool call(s) remaining (20/30 used). Finalize your edits and call submit_patch soon."
}Generated tokens 91 tokens · stopped: STOP
My mistake, I didn't check the file size. Let's read the whole `amaranth/sim/_pyrtl.py` or at least the end of it. Wait, let's find where `Memory` is handled in `amaranth/sim/_pyrtl.py`.<channel|><|tool_call>call:run_command{command:<|"|>grep -n "Memory" amaranth/sim/_pyrtl.py<|"|>}<tool_call|><|tool_response>
Turn 21at 400 s146 tokens out5,821 prompt tokens
Wait, `grep -n "Memory" amaranth/sim/_pyrtl.py` returned nothing? That's strange. Let me check if it is `amaranth/sim/_pyrtl.py` or something else. Maybe it is in `amaranth/hdl/mem.py`'s `Memory` class having some simulation methods? No, `Memory` usually targets the backend. Let's check `amaranth/sim/_pyrtl.py` again. Maybe the word is `mem` or `memory` (case insensitive).
TOOL CALL · run_command
{
"command": "grep -rin \"memory\" amaranth/sim/"
}Result of run_command 240 characters
{
"status": "error",
"error_type": "CommandError",
"error_message": "",
"details": {
"stdout": "",
"stderr": "",
"exit_code": 1
},
"budget_warning": "Only 9 tool call(s) remaining (21/30 used). Finalize your edits and call submit_patch soon."
}Generated tokens 146 tokens · stopped: STOP
Wait, `grep -n "Memory" amaranth/sim/_pyrtl.py` returned nothing? That's strange. Let me check if it is `amaranth/sim/_pyrtl.py` or something else.
Maybe it is in `amaranth/hdl/mem.py`'s `Memory` class having some simulation methods?
No, `Memory` usually targets the backend.
Let's check `amaranth/sim/_pyrtl.py` again. Maybe the word is `mem` or `memory` (case insensitive).
<channel|><|tool_call>call:run_command{command:<|"|>grep -rin "memory" amaranth/sim/<|"|>}<tool_call|><|tool_response>
Turn 22at 412 s159 tokens out6,057 prompt tokens
Wait, why is `grep -rin "memory" amaranth/sim/` failing? Ah, maybe because `grep -r` isn't available or something? No, `grep -rn` worked before. Let me try `grep -i "memory" amaranth/sim/_pyrtl.py`. Wait, I used `grep -rn` in the first turn. Ah, I see. `grep -rn "Memory" amaranth/sim/_pyrtl.py` should work. Let me try `grep -i "memory" amaranth/sim/_pyrtl.py`.
TOOL CALL · run_command
{
"command": "grep -i \"memory\" amaranth/sim/_pyrtl.py"
}Result of run_command 240 characters
{
"status": "error",
"error_type": "CommandError",
"error_message": "",
"details": {
"stdout": "",
"stderr": "",
"exit_code": 1
},
"budget_warning": "Only 8 tool call(s) remaining (22/30 used). Finalize your edits and call submit_patch soon."
}Generated tokens 159 tokens · stopped: STOP
Wait, why is `grep -rin "memory" amaranth/sim/` failing? Ah, maybe because `grep -r` isn't available or something? No, `grep -rn` worked before.
Let me try `grep -i "memory" amaranth/sim/_pyrtl.py`.
Wait, I used `grep -rn` in the first turn.
Ah, I see. `grep -rn "Memory" amaranth/sim/_pyrtl.py` should work.
Let me try `grep -i "memory" amaranth/sim/_pyrtl.py`.
<channel|><|tool_call>call:run_command{command:<|"|>grep -i "memory" amaranth/sim/_pyrtl.py<|"|>}<tool_call|><|tool_response>
Turn 23at 414 s42 tokens out6,306 prompt tokens
This is very strange. Let me list the files in `amaranth/sim/` again.
TOOL CALL · run_command
{
"command": "ls amaranth/sim/"
}Result of run_command 251 characters
{
"status": "ok",
"stdout": "__init__.py\n_base.py\n_pyclock.py\n_pycoro.py\n_pyrtl.py\ncore.py\npysim.py\n",
"stderr": "",
"exit_code": 0,
"budget_warning": "Only 7 tool call(s) remaining (23/30 used). Finalize your edits and call submit_patch soon."
}Generated tokens 42 tokens · stopped: STOP
This is very strange. Let me list the files in `amaranth/sim/` again.
<channel|><|tool_call>call:run_command{command:<|"|>ls amaranth/sim/<|"|>}<tool_call|><|tool_response>
Turn 24at 421 s88 tokens out6,465 prompt tokens
Okay, so it is there. Let me try `cat amaranth/sim/_pyrtl.py | grep -i "memory"`. Wait, maybe I should search for `Memory` in the whole `amaranth` directory to see where it's handled in simulation.
TOOL CALL · run_command
{
"command": "grep -rn \"Memory\" amaranth/ | grep \"sim\""
}Result of run_command 240 characters
{
"status": "error",
"error_type": "CommandError",
"error_message": "",
"details": {
"stdout": "",
"stderr": "",
"exit_code": 1
},
"budget_warning": "Only 6 tool call(s) remaining (24/30 used). Finalize your edits and call submit_patch soon."
}Generated tokens 88 tokens · stopped: STOP
Okay, so it is there. Let me try `cat amaranth/sim/_pyrtl.py | grep -i "memory"`.
Wait, maybe I should search for `Memory` in the whole `amaranth` directory to see where it's handled in simulation.
<channel|><|tool_call>call:run_command{command:<|"|>grep -rn "Memory" amaranth/ | grep "sim"<|"|>}<tool_call|><|tool_response>
Turn 25at 425 s75 tokens out6,643 prompt tokens
I am very confused why `grep` is failing. Let me try a simple `grep` on a known file. `grep "PySimEngine" amaranth/sim/pysim.py`
TOOL CALL · run_command
{
"command": "grep \"PySimEngine\" amaranth/sim/pysim.py"
}Result of run_command 234 characters
{
"status": "ok",
"stdout": "__all__ = [\"PySimEngine\"]\nclass PySimEngine(BaseEngine):\n",
"stderr": "",
"exit_code": 0,
"budget_warning": "Only 5 tool call(s) remaining (25/30 used). Finalize your edits and call submit_patch soon."
}Generated tokens 75 tokens · stopped: STOP
I am very confused why `grep` is failing. Let me try a simple `grep` on a known file.
`grep "PySimEngine" amaranth/sim/pysim.py`
<channel|><|tool_call>call:run_command{command:<|"|>grep "PySimEngine" amaranth/sim/pysim.py<|"|>}<tool_call|><|tool_response>
Turn 26at 433 s117 tokens out6,810 prompt tokens
Okay, `grep` works. So `grep -i "memory" amaranth/sim/_pyrtl.py` returning 1 means no match. Let me look at `amaranth/sim/_pyrtl.py` again. I'll read it in chunks. It's quite large. Let me use `read_file` to read the beginning.
TOOL CALL · read_file
{
"end_line": 500,
"filepath": "amaranth/sim/_pyrtl.py",
"start_line": 1
}Result of read_file 4,771 characters
{
"status": "ok",
"filepath": "amaranth/sim/_pyrtl.py",
"content": "import os\nimport tempfile\nfrom contextlib import contextmanager\nimport sys\n\nfrom ..hdl import *\nfrom ..hdl.ast import SignalSet\nfrom ..hdl.xfrm import ValueVisitor, StatementVisitor, LHSGroupFilter\nfrom ._base import BaseProcess\n\n\n__all__ = [\"PyRTLProcess\"]\n\n_USE_PATTERN_MATCHING = (sys.version_info >= (3, 10))\n\nclass PyRTLProcess(BaseProcess):\n __slots__ = (\"is_comb\", \"runnable\", \"passive\", \"run\")\n\n def __init__(self, *, is_comb):\n self.is_comb = is_comb\n\n self.reset()\n\n def reset(self):\n self.runnable = self.is_comb\n self.passive = True\n\n\nclass _PythonEmitter:\n def __init__(self):\n self._buffer = []\n self._suffix = 0\n self._level = 0\n\n def append(self, code):\n self._buffer.append(\" \" * self._level)\n self._buffer.append(code)\n self._buffer.append(\"\\n\")\n\n @contextmanager\n def indent(self):\n self._level += 1\n yield\n self._level -= 1\n\n def flush(self, indent=\"\"):\n code = \"\".join(self._buffer)\n self._buffer.clear()\n return code\n\n def gen_var(self, prefix):\n name = f\"{prefix}_{self._suffix}\"\n self._suffix += 1\n return name\n\n def def_var(self, prefix, value):\n name = self.gen_var(prefix)\n self.append(f\"{name} = {value}\")\n return name\n\n\nclass _Compiler:\n def __init__(self, state, emitter):\n self.state = state\n self.emitter = emitter\n\n\nclass _ValueCompiler(ValueVisitor, _Compiler):\n helpers = {\n \"sign\": lambda value, sign: value | sign if value & sign else value,\n \"zdiv\": lambda lhs, rhs: 0 if rhs == 0 else lhs // rhs,\n \"zmod\": lambda lhs, rhs: 0 if rhs == 0 else lhs % rhs,\n }\n\n def on_value(self, value):\n # Very large values are unlikely to compile or simulate in reasonable time.\n if len(value) > 2 ** 16:\n if value.src_loc:\n src = \"{}:{}\".format(*value.src_loc)\n else:\n src = \"unknown location\"\n raise OverflowError(\"Value defined at {} is {} bits wide, which is unlikely to \"\n \"simulate in reasonable time\"\n .format(src, len(value)))\n\n v = super().on_value(value)\n if isinstance(v, str) and len(v) > 1000:\n # Avoid parser stack overflow on older Pythons.\n return self.emitter.def_var(\"intermediate\", v)\n return v\n\n def on_ClockSignal(self, value):\n raise NotImplementedError # :nocov:\n\n def on_ResetSignal(self, value):\n raise NotImplementedError # :nocov:\n\n def on_AnyConst(self, value):\n raise NotImplementedError # :nocov:\n\n def on_AnySeq(self, value):\n raise NotImplementedError # :nocov:\n\n def on_Sample(self, value):\n raise NotImplementedError # :nocov:\n\n def on_Initial(self, value):\n raise NotImplementedError # :nocov:\n\n\nclass _RHSValueCompiler(_ValueCompiler):\n def __init__(self, state, emitter, *, mode, inputs=None):\n super().__init__(state, emitter)\n assert mode in (\"curr\", \"next\")\n self.mode = mode\n # If not None, `inputs` gets populated with RHS signals.\n self.inputs = inputs\n\n def on_Const(self, value):\n return f\"{value.value}\"\n\n def on_Signal(self, value):\n if self.inputs is not None:\n self.inputs.add(value)\n\n if self.mode == \"curr\":\n return f\"slots[{self.state.get_signal(value)}].{self.mode}\"\n else:\n return f\"next_{self.state.get_signal(value)}\"\n\n def on_Operator(self, value):\n def mask(value):\n value_mask = (1 << len(value)) - 1\n return f\"({value_mask:#x} & {self(value)})\"\n\n def sign(value):\n if value.shape().signed:\n return f\"sign({mask(value)}, {-1 << (len(value) - 1):#x})\"\n else: # unsigned\n return mask(value)\n\n if len(value.operands) == 1:\n arg, = value.operands\n if value.operator == \"~\":\n return f\"(~{mask(arg)})\"\n if value.operator == \"-\":\n return f\"(-{sign(arg)})\"\n if value.operator == \"b\":\n return f\"bool({mask(arg)})\"\n if value.operator == \"r|\":",
"start_line": 1,
"end_line": 150,
"total_lines": 481,
"is_truncated": true,
"budget_warning": "Only 4 tool call(s) remaining (26/30 used). Finalize your edits and call submit_patch soon."
}Generated tokens 117 tokens · stopped: STOP
Okay, `grep` works. So `grep -i "memory" amaranth/sim/_pyrtl.py` returning 1 means no match.
Let me look at `amaranth/sim/_pyrtl.py` again. I'll read it in chunks.
It's quite large. Let me use `read_file` to read the beginning.
<channel|><|tool_call>call:read_file{filepath:<|"|>amaranth/sim/_pyrtl.py<|"|>,start_line:1,end_line:500}<tool_call|><|tool_response>
Turn 27at 438 s60 tokens out8,391 prompt tokens
Okay, `_pyrtl.py` is only 481 lines. Let's read the rest of it.
TOOL CALL · read_file
{
"filepath": "amaranth/sim/_pyrtl.py",
"start_line": 151
}Result of read_file 7,082 characters
{
"status": "ok",
"filepath": "amaranth/sim/_pyrtl.py",
"content": " return f\"(0 != {mask(arg)})\"\n if value.operator == \"r&\":\n return f\"({(1 << len(arg)) - 1} == {mask(arg)})\"\n if value.operator == \"r^\":\n # Believe it or not, this is the fastest way to compute a sideways XOR in Python.\n return f\"(format({mask(arg)}, 'b').count('1') % 2)\"\n if value.operator in (\"u\", \"s\"):\n # These operators don't change the bit pattern, only its interpretation.\n return self(arg)\n elif len(value.operands) == 2:\n lhs, rhs = value.operands\n if value.operator == \"+\":\n return f\"({sign(lhs)} + {sign(rhs)})\"\n if value.operator == \"-\":\n return f\"({sign(lhs)} - {sign(rhs)})\"\n if value.operator == \"*\":\n return f\"({sign(lhs)} * {sign(rhs)})\"\n if value.operator == \"//\":\n return f\"zdiv({sign(lhs)}, {sign(rhs)})\"\n if value.operator == \"%\":\n return f\"zmod({sign(lhs)}, {sign(rhs)})\"\n if value.operator == \"&\":\n return f\"({mask(lhs)} & {mask(rhs)})\"\n if value.operator == \"|\":\n return f\"({mask(lhs)} | {mask(rhs)})\"\n if value.operator == \"^\":\n return f\"({mask(lhs)} ^ {mask(rhs)})\"\n if value.operator == \"<<\":\n return f\"({sign(lhs)} << {sign(rhs)})\"\n if value.operator == \">>\":\n return f\"({sign(lhs)} >> {sign(rhs)})\"\n if value.operator == \"==\":\n return f\"({sign(lhs)} == {sign(rhs)})\"\n if value.operator == \"!=\":\n return f\"({sign(lhs)} != {sign(rhs)})\"\n if value.operator == \"<\":\n return f\"({sign(lhs)} < {sign(rhs)})\"\n if value.operator == \"<=\":\n return f\"({sign(lhs)} <= {sign(rhs)})\"\n if value.operator == \">\":\n return f\"({sign(lhs)} > {sign(rhs)})\"\n if value.operator == \">=\":\n return f\"({sign(lhs)} >= {sign(rhs)})\"\n elif len(value.operands) == 3:\n if value.operator == \"m\":\n sel, val1, val0 = value.operands\n return f\"({self(val1)} if {mask(sel)} else {self(val0)})\"\n raise NotImplementedError(\"Operator '{}' not implemented\".format(value.operator)) # :nocov:\n\n def on_Slice(self, value):\n return f\"({(1 << len(value)) - 1:#x} & ({self(value.value)} >> {value.start}))\"\n\n def on_Part(self, value):\n offset_mask = (1 << len(value.offset)) - 1\n offset = f\"({value.stride} * ({offset_mask:#x} & {self(value.offset)}))\"\n return f\"({(1 << value.width) - 1} & \" \\\n f\"{self(value.value)} >> {offset})\"\n\n def on_Cat(self, value):\n gen_parts = []\n offset = 0\n for part in value.parts:\n part_mask = (1 << len(part)) - 1\n gen_parts.append(f\"(({part_mask:#x} & {self(part)}) << {offset})\")\n offset += len(part)\n if gen_parts:\n return f\"({' | '.join(gen_parts)})\"\n return f\"0\"\n\n def on_ArrayProxy(self, value):\n index_mask = (1 << len(value.index)) - 1\n gen_index = self.emitter.def_var(\"rhs_index\", f\"{index_mask:#x} & {self(value.index)}\")\n gen_value = self.emitter.gen_var(\"rhs_proxy\")\n if value.elems:\n if _USE_PATTERN_MATCHING:\n self.emitter.append(f\"match {gen_index}:\")\n with self.emitter.indent():\n for index, elem in enumerate(value.elems):\n self.emitter.append(f\"case {index}:\")\n with self.emitter.indent():\n self.emitter.append(f\"{gen_value} = {self(elem)}\")\n self.emitter.append(\"case _:\")\n with self.emitter.indent():\n self.emitter.append(f\"{gen_value} = {self(value.elems[-1])}\")\n else:\n for index, elem in enumerate(value.elems):\n if index == 0:\n self.emitter.append(f\"if {index} == {gen_index}:\")\n else:\n self.emitter.append(f\"elif {index} == {gen_index}:\")\n with self.emitter.indent():\n self.emitter.append(f\"{gen_value} = {self(elem)}\")\n self.emitter.append(f\"else:\")\n with self.emitter.indent():\n self.emitter.append(f\"{gen_value} = {self(value.elems[-1])}\")\n\n return gen_value\n else:\n return f\"0\"\n\n @classmethod\n def compile(cls, state, value, *, mode):\n emitter = _PythonEmitter()\n compiler = cls(state, emitter, mode=mode)\n emitter.append(f\"result = {compiler(value)}\")\n return emitter.flush()\n\n\nclass _LHSValueCompiler(_ValueCompiler):\n def __init__(self, state, emitter, *, rhs, outputs=None):\n super().__init__(state, emitter)\n # `rrhs` is used to translate rvalues that are syntactically a part of an lvalue, e.g.\n # the offset of a Part.\n self.rrhs = rhs\n # `lrhs` is used to translate the read part of a read-modify-write cycle during partial\n # update of an lvalue.\n self.lrhs = _RHSValueCompiler(state, emitter, mode=\"next\", inputs=None)\n # If not None, `outputs` gets populated with signals on LHS.\n self.outputs = outputs\n\n def on_Const(self, value):\n raise TypeError # :nocov:\n\n def on_Signal(self, value):\n if self.outputs is not None:\n self.outputs.add(value)\n\n def gen(arg):\n value_mask = (1 << len(value)) - 1\n if value.shape().signed:\n value_sign = f\"sign({value_mask:#x} & {arg}, {-1 << (len(value) - 1)})\"\n else: # unsigned\n value_sign = f\"{value_mask:#x} & {arg}\"\n self.emitter.append(f\"next_{self.state.get_signal(value)} = {value_sign}\")\n return gen\n\n def on_Operator(self, value):\n if value.operator in (\"u\", \"s\"):\n return self(value.operands[0])\n raise TypeError # :nocov:\n\n def on_Slice(self, value):\n def gen(arg):\n width_mask = (1 << (value.stop - value.start)) - 1\n self(value.value)(f\"({self.lrhs(value.value)} & \" \\\n f\"{~(width_mask << value.start):#x} | \" \\\n f\"(({width_mask:#x} & {arg}) << {value.start}))\")\n return gen\n\n def on_Part(self, value):",
"start_line": 151,
"end_line": 300,
"total_lines": 481,
"is_truncated": true,
"budget_warning": "Only 3 tool call(s) remaining (27/30 used). Finalize your edits and call submit_patch soon."
}Generated tokens 60 tokens · stopped: STOP
Okay, `_pyrtl.py` is only 481 lines.
Let's read the rest of it.
<channel|><|tool_call>call:read_file{filepath:<|"|>amaranth/sim/_pyrtl.py<|"|>,start_line:151}<tool_call|><|tool_response>
Patch, tests and logs
Final code change Included
Test output Included
============================= test session starts ============================== collected 88 items tests/test_sim.py ...................................................... [ 61%] .................F................ [100%] =================================== FAILURES =================================== E AssertionError: 68 != 34 /usr/local/lib/python3.10/unittest/case.py:838: AssertionError: 68 != 34 ==================================== PASSES ==================================== - generated xml file: /tmp/rebench-grade-9581e91b7cff42f999654650cc3dd0c3.xml -- =========================== short test summary info ============================ PASSED tests/test_sim.py::SimulatorUnitTestCase::test_abs PASSED tests/test_sim.py::SimulatorUnitTestCase::test_add PASSED tests/test_sim.py::SimulatorUnitTestCase::test_all PASSED tests/test_sim.py::SimulatorUnitTestCase::test_and PASSED tests/test_sim.py::SimulatorUnitTestCase::test_any PASSED tests/test_sim.py::SimulatorUnitTestCase::test_array PASSED tests/test_sim.py::SimulatorUnitTestCase::test_array_attr PASSED tests/test_sim.py::SimulatorUnitTestCase::test_array_index PASSED tests/test_sim.py::SimulatorUnitTestCase::test_array_lhs PASSED tests/test_sim.py::SimulatorUnitTestCase::test_array_lhs_oob PASSED tests/test_sim.py::SimulatorUnitTestCase::test_array_oob PASSED tests/test_sim.py::SimulatorUnitTestCase::test_as_signed PASSED tests/test_sim.py::SimulatorUnitTestCase::test_as_signed_issue_502 PASSED tests/test_sim.py::SimulatorUnitTestCase::test_as_signed_lhs PASSED tests/test_sim.py::SimulatorUnitTestCase::test_as_unsigned PASSED tests/test_sim.py::SimulatorUnitTestCase::test_as_unsigned_lhs PASSED tests/test_sim.py::SimulatorUnitTestCase::test_bit_select PASSED tests/test_sim.py::SimulatorUnitTestCase::test_bit_select_lhs PASSED tests/test_sim.py::SimulatorUnitTestCase::test_bool PASSED tests/test_sim.py::SimulatorUnitTestCase::test_cat PASSED tests/test_sim.py::SimulatorUnitTestCase::test_cat_lhs PASSED tests/test_sim.py::SimulatorUnitTestCase::test_eq PASSED tests/test_sim.py::SimulatorUnitTestCase::test_floordiv PASSED tests/test_sim.py::SimulatorUnitTestCase::test_floordiv_neg PASSED tests/test_sim.py::SimulatorUnitTestCase::test_ge PASSED tests/test_sim.py::SimulatorUnitTestCase::test_gt PASSED tests/test_sim.py::SimulatorUnitTestCase::test_invert PASSED tests/test_sim.py::SimulatorUnitTestCase::test_le PASSED tests/test_sim.py::SimulatorUnitTestCase::test_lt PASSED tests/test_sim.py::SimulatorUnitTestCase::test_mod PASSED tests/test_sim.py::SimulatorUnitTestCase::test_mod_neg PASSED tests/test_sim.py::SimulatorUnitTestCase::test_mul PASSED tests/test_sim.py::SimulatorUnitTestCase::test_mux PASSED tests/test_sim.py::SimulatorUnitTestCase::test_mux_invert PASSED tests/test_sim.py::SimulatorUnitTestCase::test_mux_wide PASSED tests/test_sim.py::SimulatorUnitTestCase::test_ne PASSED tests/test_sim.py::SimulatorUnitTestCase::test_neg PASSED tests/test_sim.py::SimulatorUnitTestCase::test_nested_cat_lhs PASSED tests/test_sim.py::SimulatorUnitTestCase::test_or PASSED tests/test_sim.py::SimulatorUnitTestCase::test_record PASSED tests/test_sim.py::SimulatorUnitTestCase::test_replicate PASSED tests/test_sim.py::SimulatorUnitTestCase::test_rotate_left PASSED tests/test_sim.py::SimulatorUnitTestCase::test_rotate_right PASSED tests/test_sim.py::SimulatorUnitTestCase::test_shift_left PASSED tests/test_sim.py::SimulatorUnitTestCase::test_shift_right PASSED tests/test_sim.py::SimulatorUnitTestCase::test_shl PASSED tests/test_sim.py::SimulatorUnitTestCase::test_shr PASSED tests/test_sim.py::SimulatorUnitTestCase::test_slice PASSED tests/test_sim.py::SimulatorUnitTestCase::test_slice_lhs PASSED tests/test_sim.py::SimulatorUnitTestCase::test_sub PASSED tests/test_sim.py::SimulatorUnitTestCase::test_word_select PASSED tests/test_sim.py::SimulatorUnitTestCase::test_word_select_lhs PASSED tests/test_sim.py::SimulatorUnitTestCase::test_xor_binary PASSED tests/test_sim.py::SimulatorUnitTestCase::test_xor_unary PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_add_clock_if_exists PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_add_clock_wrong_missing PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_add_clock_wrong_twice PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_add_process_wrong PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_add_process_wrong_generator PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_alu PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_clock_phase PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_command_wrong PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_complex_lhs_rhs PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_counter_clock_and_sync_process PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_counter_process PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_large_expr_parser_overflow PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_memory_async_read_write PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_memory_init PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_memory_read_before_write PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_memory_read_only PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_memory_transparency_multibit PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_memory_write PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_memory_write_granularity PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_memory_write_through PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_multiclock PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_no_negated_boolean_warning PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_reset PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_run_until PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_run_until_fail PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_sample_helpers PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_vcd_wrong_nonzero_time PASSED tests/test_sim.py::SimulatorRegressionTestCase::test_bug_325 PASSED tests/test_sim.py::SimulatorRegressionTestCase::test_bug_473 PASSED tests/test_sim.py::SimulatorRegressionTestCase::test_bug_566 PASSED tests/test_sim.py::SimulatorRegressionTestCase::test_bug_588 PASSED tests/test_sim.py::SimulatorRegressionTestCase::test_bug_595 PASSED tests/test_sim.py::SimulatorRegressionTestCase::test_bug_826 FAILED tests/test_sim.py::SimulatorIntegrationTestCase::test_memory_transparency_simple ========================= 1 failed, 87 passed in 0.49s =========================
Test errors Included
Test report (JUnit) Included
<?xml version="1.0" encoding="utf-8"?><testsuites name="pytest tests"><testsuite name="pytest" errors="0" failures="1" skipped="0" tests="88" time="0.490" timestamp="2026-11-14T02:46:32.179380+00:00" hostname="1e570c61a133"><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_abs" time="0.017" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_add" time="0.002" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_all" time="0.002" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_and" time="0.001" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_any" time="0.002" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_array" time="0.002" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_array_attr" time="0.009" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_array_index" time="0.219" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_array_lhs" time="0.003" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_array_lhs_oob" time="0.002" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_array_oob" time="0.001" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_as_signed" time="0.001" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_as_signed_issue_502" time="0.001" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_as_signed_lhs" time="0.001" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_as_unsigned" time="0.002" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_as_unsigned_lhs" time="0.001" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_bit_select" time="0.002" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_bit_select_lhs" time="0.002" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_bool" time="0.002" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_cat" time="0.001" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_cat_lhs" time="0.001" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_eq" time="0.002" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_floordiv" time="0.002" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_floordiv_neg" time="0.003" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_ge" time="0.002" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_gt" time="0.002" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_invert" time="0.002" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_le" time="0.002" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_lt" time="0.002" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_mod" time="0.003" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_mod_neg" time="0.003" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_mul" time="0.002" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_mux" time="0.002" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_mux_invert" time="0.002" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_mux_wide" time="0.002" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_ne" time="0.002" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_neg" time="0.003" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_nested_cat_lhs" time="0.001" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_or" time="0.001" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_record" time="0.001" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_replicate" time="0.001" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_rotate_left" time="0.009" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_rotate_right" time="0.010" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_shift_left" time="0.001" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_shift_right" time="0.001" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_shl" time="0.002" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_shr" time="0.002" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_slice" time="0.001" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_slice_lhs" time="0.001" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_sub" time="0.002" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_word_select" time="0.002" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_word_select_lhs" time="0.002" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_xor_binary" time="0.001" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_xor_unary" time="0.003" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_add_clock_if_exists" time="0.000" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_add_clock_wrong_missing" time="0.000" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_add_clock_wrong_twice" time="0.001" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_add_process_wrong" time="0.000" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_add_process_wrong_generator" time="0.000" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_alu" time="0.002" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_clock_phase" time="0.001" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_command_wrong" time="0.001" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_complex_lhs_rhs" time="0.001" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_counter_clock_and_sync_process" time="0.001" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_counter_process" time="0.001" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_large_expr_parser_overflow" time="0.008" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_memory_async_read_write" time="0.002" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_memory_init" time="0.002" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_memory_read_before_write" time="0.002" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_memory_read_only" time="0.002" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_memory_transparency_multibit" time="0.005" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_memory_transparency_simple" time="0.002"><failure message="AssertionError: 68 != 34">E AssertionError: 68 != 34</failure></testcase><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_memory_write" time="0.002" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_memory_write_granularity" time="0.003" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_memory_write_through" time="0.002" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_multiclock" time="0.001" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_no_negated_boolean_warning" time="0.001" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_reset" time="0.001" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_run_until" time="0.002" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_run_until_fail" time="0.002" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_sample_helpers" time="0.005" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_vcd_wrong_nonzero_time" time="0.001" /><testcase classname="tests.test_sim.SimulatorRegressionTestCase" name="test_bug_325" time="0.001" /><testcase classname="tests.test_sim.SimulatorRegressionTestCase" name="test_bug_473" time="0.000" /><testcase classname="tests.test_sim.SimulatorRegressionTestCase" name="test_bug_566" time="0.001" /><testcase classname="tests.test_sim.SimulatorRegressionTestCase" name="test_bug_588" time="0.001" /><testcase classname="tests.test_sim.SimulatorRegressionTestCase" name="test_bug_595" time="0.001" /><testcase classname="tests.test_sim.SimulatorRegressionTestCase" name="test_bug_826" time="0.000" /></testsuite></testsuites>
Agent log Included
[ 0.0s] 📋 System Prompt: You are a principal Python software engineer resolving a repository issue in `/workspace`.
[ 0.0s] 🎯 Task Prompt: You are evaluating a software engineering task for repository amaranth-lang/amaranth.
[ 91.2s] 💭 (4055 chars) "The user is reporting an issue with `Memory` simulation in Amaranth.
Specifically, when reading from one address and wri..."
[ 91.2s] 🔧 run_command grep -rn --include="*.py" "class Memory" .
[ 91.2s] → ./amaranth/hdl/mem.py:12:class Memory(Elaboratable):
[ 95.9s] 💭 (125 chars) "Okay, `Memory` is in `amaranth/hdl/mem.py`.
I also need to see how it's simulated. I'll look for "Memory" in `amaranth/s..."
[ 95.9s] 🔧 run_command grep -rn --include="*.py" "Memory" amaranth/sim/
[ 96.0s] → error (exit 0):
[ 106.3s] 💭 (412 chars) "Wait, why did it fail? Ah, maybe it didn't match exactly "Memory". Let's try `grep -rn
"Memory" amaranth/sim/`.
Wait, I ..."
[ 106.3s] 📖 read_file (amaranth/hdl/mem.py)
[ 106.3s] ✓ {'status': 'ok', 'filepath': 'amaranth/hdl/mem.py', 'content': 'import operator\nfrom collections import
OrderedDict\n\n…
[ 112.7s] 💭 (245 chars) "The `Memory` class in `amaranth/hdl/mem.py` uses `self._array = Array()` where each element
is a `Signal`.
This `_array`..."
[ 112.7s] 📖 read_file (amaranth/hdl/mem.py)
[ 112.8s] ✓ {'status': 'ok', 'filepath': 'amaranth/hdl/mem.py', 'content': ' p_RD_ARST_VALUE=Const(0,
len(self._read_port…
[ 115.1s] 💭 (38 chars) "And let's see the rest of `WritePort`."
[ 115.1s] 📖 read_file (amaranth/hdl/mem.py)
[ 115.2s] ✓ {'status': 'ok', 'filepath': 'amaranth/hdl/mem.py', 'content': ' def __init__(self, memory, *,
domain="sync", granula…
[ 155.1s] 💭 (2481 chars) "In `Memory.elaborate`, it adds statements for the read and write ports.
For the synchronous read port:
```python
..."
[ 155.1s] 📖 read_file (amaranth/sim/pysim.py)
[ 155.2s] ✓ {'status': 'ok', 'filepath': 'amaranth/sim/pysim.py', 'content': 'from contextlib import
contextmanager\nimport itertool…
[ 159.1s] 💭 (103 chars) "The reproduction code uses `TestCaseWithSimulator`. Let's find where it is defined. I'll
search for it."
[ 159.1s] 🔧 run_command grep -rn "class TestCaseWithSimulator" .
[ 159.1s] → error (exit 0):
[ 174.6s] 💭 (624 chars) "Wait, it's not in the codebase? Maybe it's in `tests/`?
The search `grep -rn "class TestCaseWithSimulator" .` should hav..."
[ 174.6s] 📖 read_file (tests/test_hdl_mem.py)
[ 174.6s] ✓ {'status': 'ok', 'filepath': 'tests/test_hdl_mem.py', 'content': '# amaranth:
UnusedElaboratable=no\n\nfrom amaranth.hdl…
[ 179.6s] 💭 (124 chars) "`MemoryTestCase` inherits from `FHDLTestCase`. Let's see where `FHDLTestCase` is defined.
It's probably in `tests/utils...."
[ 179.6s] 📖 read_file (tests/utils.py)
[ 179.6s] ✓ {'status': 'ok', 'filepath': 'tests/utils.py', 'content': 'import os\nimport re\nimport shutil\nimport
subprocess\nimpor…
[ 234.3s] 💭 (104 chars) "`FHDLTestCase` doesn't seem to have the simulator it.
Let's look for where `Simulator` is used in tests."
[ 234.3s] 🔧 run_command grep -rn "Simulator(" tests/
[ 234.4s] → tests/test_lib_coding.py:31: sim = Simulator(enc)
[ 236.7s] 💭 (69 chars) "Okay, so `Simulator` is used. Let's see where `Simulator` is defined."
[ 236.7s] 🔧 run_command grep -rn "class Simulator" amaranth/sim/
[ 236.8s] → amaranth/sim/core.py:55:class Simulator:
[ 304.2s] 💭 (2963 chars) "Now I have the `Simulator`. I can create a reproduction script.
The reported bug is that reading from address 1 while wr..."
[ 304.2s] 📖 read_file (amaranth/hdl/mem.py)
[ 304.3s] ✓ {'status': 'ok', 'filepath': 'amaranth/hdl/mem.py', 'content': 'import operator\nfrom collections import
OrderedDict\n\n…
[ 309.8s] 💭 (146 chars) "Wait, `Memory.elaborate` creates an instance of `$mem_v2`, which is likely handled by the
simulator's PyRTL.
Let's check..."
[ 309.8s] 🔧 run_command grep -rn "mem_v2" amaranth/sim/_pyrtl.py
[ 309.9s] → error (exit 0):
[ 316.6s] 💭 (187 chars) "Ah, maybe it's in the simulator's PyRTL implementation as a special case for memory.
Let's search for `Memory` in `amara..."
[ 316.6s] 🔧 run_command ls amaranth/sim/
[ 316.7s] → __init__.py
[ 318.0s] 💭 (52 chars) "Let's check `amaranth/sim/_pyrtl.py` more carefully."
[ 318.0s] 📖 read_file (amaranth/sim/_pyrtl.py)
[ 318.0s] ✓ {'status': 'ok', 'filepath': 'amaranth/sim/_pyrtl.py', 'content': 'import os\nimport tempfile\nfrom
contextlib import co…
[ 324.8s] 💭 (248 chars) "The `_pyrtl.py` file seems to be a compiler that generates Python code for simulation.
Wait, I see `Core` and `Simulator..."
[ 324.8s] 📖 read_file (amaranth/sim/core.py)
[ 324.9s] ✓ {'status': 'ok', 'filepath': 'amaranth/sim/core.py', 'content': 'import inspect\nimport warnings\n\nfrom
.._utils import…
[ 328.0s] 💭 (81 chars) "`Simulator` uses `PySimEngine` by default. Let's look at `amaranth/sim/pysim.py`."
[ 328.0s] 📖 read_file (amaranth/sim/pysim.py)
[ 328.0s] ✓ {'status': 'ok', 'filepath': 'amaranth/sim/pysim.py', 'content': 'from contextlib import
contextmanager\nimport itertool…
[ 331.9s] 💭 (78 chars) "Still no `Memory` handling in `pysim.py`.
Let's look at the end of `pysim.py`."
[ 331.9s] 📖 read_file (amaranth/sim/pysim.py)
[ 331.9s] ✓ {'status': 'ok', 'filepath': 'amaranth/sim/pysim.py', 'content': '\n\nclass
_PySignalState(BaseSignalState):\n __slot…
[ 337.2s] 💭 (176 chars) "Okay, so the simulation is handled by `PySimEngine`, which uses
`_FragmentCompiler(self._state)(self._fragment)`.
Let's ..."
[ 337.2s] 📖 read_file (amaranth/sim/_pyrtl.py)
[ 337.3s] ❌ {'status': 'error', 'error_type': 'ValueError', 'error_message': 'start_line (482) cannot be greater
than end_line (481)…
[ 389.7s] 💭 (186 chars) "My mistake, I didn't check the file size. Let's read the whole `amaranth/sim/_pyrtl.py` or
at least the end of it. Wait,..."
[ 389.7s] 🔧 run_command grep -n "Memory" amaranth/sim/_pyrtl.py
[ 389.7s] → error (exit 0):
[ 399.1s] 💭 (375 chars) "Wait, `grep -n "Memory" amaranth/sim/_pyrtl.py` returned nothing? That's strange. Let me
check if it is `amaranth/sim/_p..."
[ 399.1s] 🔧 run_command grep -rin "memory" amaranth/sim/
[ 399.1s] → error (exit 0):
[ 411.4s] 💭 (363 chars) "Wait, why is `grep -rin "memory" amaranth/sim/` failing? Ah, maybe because `grep -r` isn't
available or something? No, `..."
[ 411.4s] 🔧 run_command grep -i "memory" amaranth/sim/_pyrtl.py
[ 411.5s] → error (exit 0):
[ 413.5s] 💭 (69 chars) "This is very strange. Let me list the files in `amaranth/sim/` again."
[ 413.5s] 🔧 run_command ls amaranth/sim/
[ 413.6s] → __init__.py
[ 420.5s] 💭 (198 chars) "Okay, so it is there. Let me try `cat amaranth/sim/_pyrtl.py | grep -i "memory"`.
Wait, maybe I should search for `Memo..."
[ 420.5s] 🔧 run_command grep -rn "Memory" amaranth/ | grep "sim"
[ 420.5s] → error (exit 0):
[ 425.0s] 💭 (128 chars) "I am very confused why `grep` is failing. Let me try a simple `grep` on a known file.
`grep "PySimEngine" amaranth/sim/p..."
[ 425.0s] 🔧 run_command grep "PySimEngine" amaranth/sim/pysim.py
[ 425.1s] → __all__ = ["PySimEngine"]
[ 432.8s] 💭 (227 chars) "Okay, `grep` works. So `grep -i "memory" amaranth/sim/_pyrtl.py` returning 1 means no match.
Let me look at `amaranth/si..."
[ 432.8s] 📖 read_file (amaranth/sim/_pyrtl.py)
[ 432.8s] ✓ {'status': 'ok', 'filepath': 'amaranth/sim/_pyrtl.py', 'content': 'import os\nimport tempfile\nfrom
contextlib import co…
[ 438.0s] 💭 (63 chars) "Okay, `_pyrtl.py` is only 481 lines.
Let's read the rest of it."
[ 438.0s] 📖 read_file (amaranth/sim/_pyrtl.py)
[ 438.1s] ✓ {'status': 'ok', 'filepath': 'amaranth/sim/_pyrtl.py', 'content': ' return f"(0 !=
{mask(arg)})"\n …
Native result row
{
"agent_error": "Agent exceeded session timeout (7.5 min)",
"duration_seconds": 452.79,
"error": "Empty agent patch",
"grade": {
"error": "Empty agent patch",
"resolved": false,
"strict_clean_patch": false,
"test_exit_code": -1
},
"instance_id": "amaranth-lang__amaranth-923",
"pass_idx": 0,
"patch_chars": 0,
"phase1_seconds": 452.79,
"repo": "amaranth-lang/amaranth",
"request_log_path": "/kaggle-root/working/r31/rollouts_X/requests/amaranth-lang__amaranth-923__p0__r0.jsonl",
"resolved": false,
"rollout_idx": 0,
"run_key": "amaranth-lang__amaranth-923__p0__r0",
"strict_clean_patch": false,
"tool_calls": 27,
"total_llm_calls": 27,
"trace_path": "/kaggle-root/working/r31/rollouts_X/traces/trace_amaranth-lang__amaranth-923__p0__r0.json"
}