ROLLOUT 1 · amaranth-lang/amaranth
amaranth-lang__amaranth-923
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19tool calls
19model calls
7,267tokens generated
187,971prompt tokens read
Empty agent patch
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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 98 s1,671 tokens out3,835 prompt tokens
The user is reporting a bug in `Memory` simulation in Amaranth.
It seems that writing to one address affects the data read from another address for one cycle.
The reproduction provided:
```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)
```
The output for this case is reported as:
0
0
0
14
0
Wait, the output provided in the issue is:
```
0
0
0
14
0
```
Let's trace the expected output.
Initially memory is 0.
1. `read_port.addr = 1`, `read_port.en = 1`. `yield` (one cycle).
2. `print((yield m.read_port.data))`. Should be 0. (First print)
3. `yield`.
4. `write_port.addr = 2`, `write_port.data = 14`, `write_port.en = 1`.
5. `print((yield m.read_port.data))`. `read_port.addr` is still 1, `read_port.en` is still 1. Should be 0. (Second print)
6. `yield`.
7. `write_port.en = 0`.
8. `print((yield m.read_port.data))`. Should be 0. (Third print)
9. `yield`.
10. `print((yield m.read_port.data))`. Should be 0. (Fourth print)
11. `yield`.
12. `print((yield m.read_port.data))`. Should be 0. (Fifth print)
The reported output is `0, 0, 0, 14, 0`.
The `14` appears at the 4th print.
Wait, let's re-read the process.
```py
def process():
yield m.read_port.addr.eq(1)
yield m.read_port.en.eq(1)
yield # Cycle 1
print((yield m.read_port.data)) # Print 1 (Cycle 1)
yield # Cycle 2
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)) # Print 2 (Cycle 2)
yield # Cycle 3
yield m.write_port.en.eq(0)
print((yield m.read_port.data)) # Print 3 (Cycle 3)
yield # Cycle 4
print((yield m.read_port.data)) # Print 4 (Cycle 4)
yield # Cycle 5
print((yield m.read_port.data)) # Print 5 (Cycle 5)
```
Wait, the `yield` in `print((yield m.read_port.data))` is just reading the value of the signal, it doesn't consume a cycle.
Wait, `yield m.read_port.data` if it's a signal in a simulator might return the value.
Let's look at `process()` more closely.
```py
def process():
yield m.read_port.addr.eq(1)
yield m.read_port.en.eq(1)
yield # C1
print((yield m.read_port.data)) # P1 (C1)
yield # C2
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)) # P2 (C2)
yield # C3
yield m.write_port.en.eq(0)
print((yield m.read_port.data)) # P3 (C3)
yield # C4
print((yield m.read_port.data)) # P4 (C4)
yield # C5
print((yield m.read_port.data)) # P5 (C5)
```
According to the user, the output is:
0 (P1)
0 (P2)
0 (P3)
14 (P4)
0 (P5)
Wait, P4 is at Cycle 4.
At Cycle 2: `write_port.en` set to 1, `write_port.addr` = 2, `write_port.data` = 14.
At Cycle 3: `write_port.en` set to 0.
At Cycle 4: `read_port.data` suddenly becomes 14? But `read_port.addr` is 1.
This means writing to address 2 affected reading from address 1.
This looks like a bug in the simulation of `Memory`.
`Memory` is located in `amaranth/hdl/mem.py`.
The simulation part is likely in `amaranth/sim/_pyrtl.py` or similar.
Let's start by reproducing the issue.
I need to know how `TestCaseWithSimulator` is implemented. It might be in `tests/` or some base class.
Actually, looking at the workspace layout, there are no `tests/` files visible except the directory.
The reproduction example provided is a test class. I should create a standalone reproduction script.
I need to find where `Memory` is used in simulation.
`Memory` is defined in `amaranth/hdl/mem.py`.
Let's find where `Memory` simulation is implemented.
I'll start by searching for "Memory" in `amaranth/sim`.
TOOL CALL · run_command
{
"command": "grep -rn \"Memory\" amaranth/sim"
}Result of run_command 127 characters
{
"status": "error",
"error_type": "CommandError",
"error_message": "",
"details": {
"stdout": "",
"stderr": "",
"exit_code": 1
}
}Generated tokens 1,671 tokens · stopped: STOP
<|channel>thought
The user is reporting a bug in `Memory` simulation in Amaranth.
It seems that writing to one address affects the data read from another address for one cycle.
The reproduction provided:
```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)
```
The output for this case is reported as:
0
0
0
14
0
Wait, the output provided in the issue is:
```
0
0
0
14
0
```
Let's trace the expected output.
Initially memory is 0.
1. `read_port.addr = 1`, `read_port.en = 1`. `yield` (one cycle).
2. `print((yield m.read_port.data))`. Should be 0. (First print)
3. `yield`.
4. `write_port.addr = 2`, `write_port.data = 14`, `write_port.en = 1`.
5. `print((yield m.read_port.data))`. `read_port.addr` is still 1, `read_port.en` is still 1. Should be 0. (Second print)
6. `yield`.
7. `write_port.en = 0`.
8. `print((yield m.read_port.data))`. Should be 0. (Third print)
9. `yield`.
10. `print((yield m.read_port.data))`. Should be 0. (Fourth print)
11. `yield`.
12. `print((yield m.read_port.data))`. Should be 0. (Fifth print)
The reported output is `0, 0, 0, 14, 0`.
The `14` appears at the 4th print.
Wait, let's re-read the process.
```py
def process():
yield m.read_port.addr.eq(1)
yield m.read_port.en.eq(1)
yield # Cycle 1
print((yield m.read_port.data)) # Print 1 (Cycle 1)
yield # Cycle 2
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)) # Print 2 (Cycle 2)
yield # Cycle 3
yield m.write_port.en.eq(0)
print((yield m.read_port.data)) # Print 3 (Cycle 3)
yield # Cycle 4
print((yield m.read_port.data)) # Print 4 (Cycle 4)
yield # Cycle 5
print((yield m.read_port.data)) # Print 5 (Cycle 5)
```
Wait, the `yield` in `print((yield m.read_port.data))` is just reading the value of the signal, it doesn't consume a cycle.
Wait, `yield m.read_port.data` if it's a signal in a simulator might return the value.
Let's look at `process()` more closely.
```py
def process():
yield m.read_port.addr.eq(1)
yield m.read_port.en.eq(1)
yield # C1
print((yield m.read_port.data)) # P1 (C1)
yield # C2
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)) # P2 (C2)
yield # C3
yield m.write_port.en.eq(0)
print((yield m.read_port.data)) # P3 (C3)
yield # C4
print((yield m.read_port.data)) # P4 (C4)
yield # C5
print((yield m.read_port.data)) # P5 (C5)
```
According to the user, the output is:
0 (P1)
0 (P2)
0 (P3)
14 (P4)
0 (P5)
Wait, P4 is at Cycle 4.
At Cycle 2: `write_port.en` set to 1, `write_port.addr` = 2, `write_port.data` = 14.
At Cycle 3: `write_port.en` set to 0.
At Cycle 4: `read_port.data` suddenly becomes 14? But `read_port.addr` is 1.
This means writing to address 2 affected reading from address 1.
This looks like a bug in the simulation of `Memory`.
`Memory` is located in `amaranth/hdl/mem.py`.
The simulation part is likely in `amaranth/sim/_pyrtl.py` or similar.
Let's start by reproducing the issue.
I need to know how `TestCaseWithSimulator` is implemented. It might be in `tests/` or some base class.
Actually, looking at the workspace layout, there are no `tests/` files visible except the directory.
The reproduction example provided is a test class. I should create a standalone reproduction script.
I need to find where `Memory` is used in simulation.
`Memory` is defined in `amaranth/hdl/mem.py`.
Let's find where `Memory` simulation is implemented.
I'll start by searching for "Memory" in `amaranth/sim`.<channel|><|tool_call>call:run_command{command:<|"|>grep -rn "Memory" amaranth/sim<|"|>}<tool_call|><|tool_response>
Turn 2at 104 s92 tokens out5,562 prompt tokens
Ah, maybe it's not explicitly mentioned as "Memory" but handled via some general mechanism for memories or it's in `amaranth/sim/_pyrtl.py`. Let's search for "Memory" in all of `amaranth/`.
TOOL CALL · run_command
{
"command": "grep -rn --include=\"*.py\" \"Memory\" amaranth/ | head -n 20"
}Result of run_command 1,611 characters
{
"status": "ok",
"stdout": "amaranth/compat/fhdl/specials.py:6:from ...hdl.mem import Memory as NativeMemory\namaranth/compat/fhdl/specials.py:14:__all__ = [\"TSTriple\", \"Instance\", \"Memory\", \"READ_FIRST\", \"WRITE_FIRST\", \"NO_CHANGE\"]\namaranth/compat/fhdl/specials.py:72:class _MemoryPort(CompatModule):\namaranth/compat/fhdl/specials.py:86:class CompatMemory(NativeMemory, Elaboratable):\namaranth/compat/fhdl/specials.py:130: mp = _MemoryPort(adr, dat_r, we, dat_w,\namaranth/compat/fhdl/specials.py:139:Memory = CompatMemory\namaranth/hdl/mem.py:9:__all__ = [\"Memory\", \"ReadPort\", \"WritePort\", \"DummyPort\"]\namaranth/hdl/mem.py:12:class Memory(Elaboratable):\namaranth/hdl/mem.py:40: raise TypeError(\"Memory width must be a non-negative integer, not {!r}\"\namaranth/hdl/mem.py:43: raise TypeError(\"Memory depth must be a non-negative integer, not {!r}\"\namaranth/hdl/mem.py:72: raise ValueError(\"Memory initialization value count exceed memory depth ({} > {})\"\namaranth/hdl/mem.py:82: raise TypeError(\"Memory initialization value at address {:x}: {}\"\namaranth/hdl/mem.py:217: memory : :class:`Memory`\namaranth/hdl/mem.py:218: Memory associated with the port.\namaranth/hdl/mem.py:229: memory : :class:`Memory`\namaranth/hdl/mem.py:275: memory : :class:`Memory`\namaranth/hdl/mem.py:276: Memory associated with the port.\namaranth/hdl/mem.py:285: memory : :class:`Memory`\namaranth/hdl/__init__.py:8:from .mem import Memory\namaranth/hdl/__init__.py:21: \"Memory\",\n",
"stderr": "",
"exit_code": 0
}Generated tokens 92 tokens · stopped: STOP
Ah, maybe it's not explicitly mentioned as "Memory" but handled via some general mechanism for memories or it's in `amaranth/sim/_pyrtl.py`.
Let's search for "Memory" in all of `amaranth/`.
<channel|><|tool_call>call:run_command{command:<|"|>grep -rn --include="*.py" "Memory" amaranth/ | head -n 20<|"|>}<tool_call|><|tool_response>
Turn 3at 109 s106 tokens out6,221 prompt tokens
Wait, I searched `amaranth/sim` and got an error. Let me try `grep -rn "Memory" amaranth/sim` again, maybe I made a mistake. Wait, I did `grep -rn "Memory" amaranth/sim`. Maybe there are no "Memory" strings in `amaranth/sim`. Let's check `amaranth/sim` content.
TOOL CALL · run_command
{
"command": "ls -R amaranth/sim"
}Result of run_command 153 characters
{
"status": "ok",
"stdout": "amaranth/sim:\n__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 106 tokens · stopped: STOP
Wait, I searched `amaranth/sim` and got an error. Let me try `grep -rn "Memory" amaranth/sim` again, maybe I made a mistake.
Wait, I did `grep -rn "Memory" amaranth/sim`. Maybe there are no "Memory" strings in `amaranth/sim`.
Let's check `amaranth/sim` content.
<channel|><|tool_call>call:run_command{command:<|"|>ls -R amaranth/sim<|"|>}<tool_call|><|tool_response>
Turn 4at 111 s49 tokens out6,416 prompt tokens
Let's search for "read_port" or "write_port" in `amaranth/sim`.
TOOL CALL · run_command
{
"command": "grep -rn \"port\" amaranth/sim"
}Result of run_command 2,058 characters
{
"status": "ok",
"stdout": "amaranth/sim/_pycoro.py:1:import inspect\namaranth/sim/_pycoro.py:3:from ..hdl import *\namaranth/sim/_pycoro.py:4:from ..hdl.ast import Statement, SignalSet\namaranth/sim/_pycoro.py:5:from .core import Tick, Settle, Delay, Passive, Active\namaranth/sim/_pycoro.py:6:from ._base import BaseProcess\namaranth/sim/_pycoro.py:7:from ._pyrtl import _ValueCompiler, _RHSValueCompiler, _StatementCompiler\namaranth/sim/_pycoro.py:116: raise TypeError(\"Received unsupported command {!r} from process {!r}\"\namaranth/sim/core.py:1:import inspect\namaranth/sim/core.py:2:import warnings\namaranth/sim/core.py:4:from .._utils import deprecated\namaranth/sim/core.py:5:from ..hdl.cd import *\namaranth/sim/core.py:6:from ..hdl.ir import *\namaranth/sim/core.py:7:from ._base import BaseEngine\namaranth/sim/core.py:60: from .pysim import PySimEngine\namaranth/sim/_pyrtl.py:1:import os\namaranth/sim/_pyrtl.py:2:import tempfile\namaranth/sim/_pyrtl.py:3:from contextlib import contextmanager\namaranth/sim/_pyrtl.py:4:import sys\namaranth/sim/_pyrtl.py:6:from ..hdl import *\namaranth/sim/_pyrtl.py:7:from ..hdl.ast import SignalSet\namaranth/sim/_pyrtl.py:8:from ..hdl.xfrm import ValueVisitor, StatementVisitor, LHSGroupFilter\namaranth/sim/_pyrtl.py:9:from ._base import BaseProcess\namaranth/sim/pysim.py:1:from contextlib import contextmanager\namaranth/sim/pysim.py:2:import itertools\namaranth/sim/pysim.py:3:import re\namaranth/sim/pysim.py:4:from vcd import VCDWriter\namaranth/sim/pysim.py:5:from vcd.gtkw import GTKWSave\namaranth/sim/pysim.py:7:from ..hdl import *\namaranth/sim/pysim.py:8:from ..hdl.ast import SignalDict\namaranth/sim/pysim.py:9:from ._base import *\namaranth/sim/pysim.py:10:from ._pyrtl import _FragmentCompiler\namaranth/sim/pysim.py:11:from ._pycoro import PyCoroProcess\namaranth/sim/pysim.py:12:from ._pyclock import PyClockProcess\namaranth/sim/__init__.py:1:from .core import *\namaranth/sim/_pyclock.py:1:from ._base import BaseProcess\n",
"stderr": "",
"exit_code": 0
}Generated tokens 49 tokens · stopped: STOP
Let's search for "read_port" or "write_port" in `amaranth/sim`.
<channel|><|tool_call>call:run_command{command:<|"|>grep -rn "port" amaranth/sim<|"|>}<tool_call|><|tool_response>
Turn 5at 117 s93 tokens out7,228 prompt tokens
Still nothing specifically about `Memory` simulation. Wait, how does Amaranth simulate memory? Usually, `Memory` is a special construct in the HDL. It might be handled by the simulator specifically. Let's look at `amaranth/hdl/mem.py` to see how `Memory` is defined.
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 93 tokens · stopped: STOP
Still nothing specifically about `Memory` simulation.
Wait, how does Amaranth simulate memory?
Usually, `Memory` is a special construct in the HDL. It might be handled by the simulator specifically.
Let's look at `amaranth/hdl/mem.py` to see how `Memory` is defined.
<channel|><|tool_call>call:read_file{filepath:<|"|>amaranth/hdl/mem.py<|"|>}<tool_call|><|tool_response>
Turn 6at 128 s165 tokens out9,065 prompt tokens
In `Memory.__init__`, we see:
```python
# Array of signals for simulation.
self._array = Array()
if simulate:
for addr in range(self.depth):
self._array.append(Signal(self.width, name="{}({})".
.format(name or "memory", addr)))
```
The `Memory` object has an `_array` of `Signal` objects. This is used for simulation.
Now let's look at `ReadPort` and `WritePort` in `amaranth/hdl/mem.py`.
TOOL CALL · read_file
{
"filepath": "amaranth/hdl/mem.py",
"start_line\"": 151
}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 165 tokens · stopped: STOP
In `Memory.__init__`, we see:
```python
# Array of signals for simulation.
self._array = Array()
if simulate:
for addr in range(self.depth):
self._array.append(Signal(self.width, name="{}({})".
.format(name or "memory", addr)))
```
The `Memory` object has an `_array` of `Signal` objects. This is used for simulation.
Now let's look at `ReadPort` and `WritePort` in `amaranth/hdl/mem.py`.<channel|><|tool_call>call:read_file{filepath:<|"|>amaranth/hdl/mem.py<|"|>,start_line": 151}<tool_call|><|tool_response>
Turn 7at 152 s399 tokens out10,974 prompt tokens
Wait, I called `read_file` with `start_line=151` but the output is still starting from line 1.
Looking at the response:
`"status": "ok", "filepath": "amaranth/hdl/mem.py", "content": "import operator ...", "start_line": 1, "end_line": 150, "total_lines": 354, "is_truncated": true`
It seems I requested `start_line=151` but it gave me 1-150.
Oh, wait. The `read_file` call I made was:
`read_file(filepath="amaranth/hdl/mem.py", start_line=151)`
Wait, the response shows it returned lines 1 to 150.
Wait, I think I see what happened. The `read_file` tool might be behaving weirdly or I misspoke.
Actually, looking at the `read_file` call:
`read_file(filepath="amaranth/hdl/mem.py", start_line=151)`
The returned object is:
`{"status": "ok", "filepath": "amaranth/hdl/mem.py", "content": "...", "start_line": 1, "end_line": 150, "total_lines": 354, "is_truncated": true}`
This is very strange. It ignored my `start_line`.
Let me try again with `start_line=151` and `end_line=354`.
TOOL CALL · read_file
{
"end_line": 354,
"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 399 tokens · stopped: STOP
Wait, I called `read_file` with `start_line=151` but the output is still starting from line 1.
Looking at the response:
`"status": "ok", "filepath": "amaranth/hdl/mem.py", "content": "import operator ...", "start_line": 1, "end_line": 150, "total_lines": 354, "is_truncated": true`
It seems I requested `start_line=151` but it gave me 1-150.
Oh, wait. The `read_file` call I made was:
`read_file(filepath="amaranth/hdl/mem.py", start_line=151)`
Wait, the response shows it returned lines 1 to 150.
Wait, I think I see what happened. The `read_file` tool might be behaving weirdly or I misspoke.
Actually, looking at the `read_file` call:
`read_file(filepath="amaranth/hdl/mem.py", start_line=151)`
The returned object is:
`{"status": "ok", "filepath": "amaranth/hdl/mem.py", "content": "...", "start_line": 1, "end_line": 150, "total_lines": 354, "is_truncated": true}`
This is very strange. It ignored my `start_line`.
Let me try again with `start_line=151` and `end_line=354`.
<channel|><|tool_call>call:read_file{end_line:354,filepath:<|"|>amaranth/hdl/mem.py<|"|>,start_line:151}<tool_call|><|tool_response>
Turn 8at 156 s42 tokens out13,360 prompt tokens
And finally, the end of the file:
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 42 tokens · stopped: STOP
And finally, the end of the file:
<channel|><|tool_call>call:read_file{filepath:<|"|>amaranth/hdl/mem.py<|"|>,start_line:301}<tool_call|><|tool_response>
Turn 9at 224 s1,080 tokens out14,141 prompt tokens
Okay, I've read `amaranth/hdl/mem.py`.
The `Memory.elaborate` method defines how memory is simulated using an array of signals:
```python
for port in self._read_ports:
port._MustUse__used = True
if port.domain == "comb":
# Asynchronous port
f.add_statements(port.data.eq(self._array[port.addr]))
f.add_driver(port.data)
else:
# Synchronous port
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)
for port in self._write_ports:
port._MustUse__used = True
if len(port.en) > 1:
# ... (granularity handling)
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)
```
Wait, look at the `write_port` simulation:
```python
for port in self._write_ports:
port._MustUse__used = True
if len(port.en) > 1:
# ...
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)
```
`self._array[port.addr]` is a `Signal`. `self._array[port.addr].eq(port.data)` creates an assignment statement.
The `write_port.addr` is a `Signal`.
The `self._array[port.addr]` indexing of an `Array` of `Signal`s.
I need to check how `Array` is implemented. It's probably in `amaranth/hdl/ast.py`.
Wait, the issue says: "Write cause that on read data output port there is visible written value for one cycle."
In the reproduction:
Cycle 2: `write_port.addr = 2`, `write_port.data = 14`, `write_port.en = 1`.
Cycle 3: `write_port.en = 0`.
Cycle 4: `read_port.data` is 14, while `read_port.addr` is 1.
If `write_port.addr` was 2, then `self._array[port.addr]` should be `self._array[2]`.
If `read_port.addr` is 1, then `self._array[port.addr]` should be `self._array[1]`.
Wait, if `self._array[port.addr].eq(port.data)` is used in a `Switch`, it means at the clock edge where `port.en` is 1, the signal `self._array[port.addr]` is updated to `port.data`.
But `port.addr` is a signal.
How does simulation handle `self._array[Signal]`?
This usually means there's some logic in the simulator that handles `Array` indexing with `Signal`.
Let's check `amaranth/hdl/ast.py` for `Array` and how it's used.
Actually, let's first try to reproduce the bug. I'll use the code provided in the issue.
I need to implement `TestCaseWithSimulator`. I'll search for where it's defined.
It might be in `tests/` but I don't see `tests/` files.
Wait, maybe it's in `amaranth/sim/pysim.py` or somewhere else.
Looking at the reproduction, it uses `self.run_simulation(m)`.
Actually, I can just use `PySimEngine` directly if I know how.
Or I can try to find `TestCaseWithSimulator` in the codebase.
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 1,080 tokens · stopped: STOP
Okay, I've read `amaranth/hdl/mem.py`.
The `Memory.elaborate` method defines how memory is simulated using an array of signals:
```python
for port in self._read_ports:
port._MustUse__used = True
if port.domain == "comb":
# Asynchronous port
f.add_statements(port.data.eq(self._array[port.addr]))
f.add_driver(port.data)
else:
# Synchronous port
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)
for port in self._write_ports:
port._MustUse__used = True
if len(port.en) > 1:
# ... (granularity handling)
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)
```
Wait, look at the `write_port` simulation:
```python
for port in self._write_ports:
port._MustUse__used = True
if len(port.en) > 1:
# ...
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)
```
`self._array[port.addr]` is a `Signal`. `self._array[port.addr].eq(port.data)` creates an assignment statement.
The `write_port.addr` is a `Signal`.
The `self._array[port.addr]` indexing of an `Array` of `Signal`s.
I need to check how `Array` is implemented. It's probably in `amaranth/hdl/ast.py`.
Wait, the issue says: "Write cause that on read data output port there is visible written value for one cycle."
In the reproduction:
Cycle 2: `write_port.addr = 2`, `write_port.data = 14`, `write_port.en = 1`.
Cycle 3: `write_port.en = 0`.
Cycle 4: `read_port.data` is 14, while `read_port.addr` is 1.
If `write_port.addr` was 2, then `self._array[port.addr]` should be `self._array[2]`.
If `read_port.addr` is 1, then `self._array[port.addr]` should be `self._array[1]`.
Wait, if `self._array[port.addr].eq(port.data)` is used in a `Switch`, it means at the clock edge where `port.en` is 1, the signal `self._array[port.addr]` is updated to `port.data`.
But `port.addr` is a signal.
How does simulation handle `self._array[Signal]`?
This usually means there's some logic in the simulator that handles `Array` indexing with `Signal`.
Let's check `amaranth/hdl/ast.py` for `Array` and how it's used.
Actually, let's first try to reproduce the bug. I'll use the code provided in the issue.
I need to implement `TestCaseWithSimulator`. I'll search for where it's defined.
It might be in `tests/` but I don't see `tests/` files.
Wait, maybe it's in `amaranth/sim/pysim.py` or somewhere else.
Looking at the reproduction, it uses `self.run_simulation(m)`.
Actually, I can just use `PySimEngine` directly if I know how.
Or I can try to find `TestCaseWithSimulator` in the codebase.
<channel|><|tool_call>call:run_command{command:<|"|>grep -rn "class TestCaseWithSimulator" .<|"|>}<tool_call|><|tool_response>
Turn 10at 226 s43 tokens out15,276 prompt tokens
It's not in the source. It must be in the tests. Let me check `tests/` directory.
TOOL CALL · run_command
{
"command": "ls tests/"
}Result of run_command 497 characters
{
"status": "ok",
"stdout": "__init__.py\ncompat\ntest_build_dsl.py\ntest_build_plat.py\ntest_build_res.py\ntest_compat.py\ntest_examples.py\ntest_hdl_ast.py\ntest_hdl_cd.py\ntest_hdl_dsl.py\ntest_hdl_ir.py\ntest_hdl_mem.py\ntest_hdl_rec.py\ntest_hdl_xfrm.py\ntest_lib_cdc.py\ntest_lib_coding.py\ntest_lib_crc.py\ntest_lib_data.py\ntest_lib_enum.py\ntest_lib_fifo.py\ntest_lib_io.py\ntest_lib_scheduler.py\ntest_lib_wiring.py\ntest_sim.py\ntest_tracer.py\nutils.py\n",
"stderr": "",
"exit_code": 0
}Generated tokens 43 tokens · stopped: STOP
It's not in the source. It must be in the tests.
Let me check `tests/` directory.<channel|><|tool_call>call:run_command{command:<|"|>ls tests/<|"|>}<tool_call|><|tool_response>
Turn 11at 275 s50 tokens out4,522 prompt tokens
Let's look at `tests/test_hdl_mem.py` to see how memory is tested.
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 50 tokens · stopped: STOP
Let's look at `tests/test_hdl_mem.py` to see how memory is tested.
<channel|><|tool_call>call:read_file{filepath:<|"|>tests/test_hdl_mem.py<|"|>}<tool_call|><|tool_response>
Turn 12at 279 s62 tokens out6,455 prompt tokens
`tests/test_hdl_mem.py` only does geometry and initialization tests. Let's check `tests/test_sim.py`.
TOOL CALL · read_file
{
"filepath": "tests/test_sim.py",
"start_line": 1
}Result of read_file 6,589 characters
{
"status": "ok",
"filepath": "tests/test_sim.py",
"content": "import os\nimport warnings\nfrom contextlib import contextmanager\n\nfrom amaranth._utils import flatten\nfrom amaranth.hdl.ast import *\nfrom amaranth.hdl.cd import *\nfrom amaranth.hdl.mem import *\nwith warnings.catch_warnings():\n warnings.filterwarnings(action=\"ignore\", category=DeprecationWarning)\n from amaranth.hdl.rec import *\nfrom amaranth.hdl.dsl import *\nfrom amaranth.hdl.ir import *\nfrom amaranth.sim import *\n\nfrom .utils import *\nfrom amaranth._utils import _ignore_deprecated\n\n\nclass SimulatorUnitTestCase(FHDLTestCase):\n def assertStatement(self, stmt, inputs, output, reset=0):\n inputs = [Value.cast(i) for i in inputs]\n output = Value.cast(output)\n\n isigs = [Signal(i.shape(), name=n) for i, n in zip(inputs, \"abcd\")]\n osig = Signal(output.shape(), name=\"y\", reset=reset)\n\n stmt = stmt(osig, *isigs)\n frag = Fragment()\n frag.add_statements(stmt)\n for signal in flatten(s._lhs_signals() for s in Statement.cast(stmt)):\n frag.add_driver(signal)\n\n sim = Simulator(frag)\n def process():\n for isig, input in zip(isigs, inputs):\n yield isig.eq(input)\n yield Settle()\n self.assertEqual((yield osig), output.value)\n sim.add_process(process)\n with sim.write_vcd(\"test.vcd\", \"test.gtkw\", traces=[*isigs, osig]):\n sim.run()\n\n def test_invert(self):\n stmt = lambda y, a: y.eq(~a)\n self.assertStatement(stmt, [C(0b0000, 4)], C(0b1111, 4))\n self.assertStatement(stmt, [C(0b1010, 4)], C(0b0101, 4))\n self.assertStatement(stmt, [C(0, 4)], C(-1, 4))\n\n def test_neg(self):\n stmt = lambda y, a: y.eq(-a)\n self.assertStatement(stmt, [C(0b0000, 4)], C(0b0000, 4))\n self.assertStatement(stmt, [C(0b0001, 4)], C(0b1111, 4))\n self.assertStatement(stmt, [C(0b1010, 4)], C(0b0110, 4))\n self.assertStatement(stmt, [C(1, 4)], C(-1, 4))\n self.assertStatement(stmt, [C(5, 4)], C(-5, 4))\n\n def test_bool(self):\n stmt = lambda y, a: y.eq(a.bool())\n self.assertStatement(stmt, [C(0, 4)], C(0))\n self.assertStatement(stmt, [C(1, 4)], C(1))\n self.assertStatement(stmt, [C(2, 4)], C(1))\n\n def test_as_unsigned(self):\n stmt = lambda y, a, b: y.eq(a.as_unsigned() == b)\n self.assertStatement(stmt, [C(0b01, signed(2)), C(0b0001, unsigned(4))], C(1))\n self.assertStatement(stmt, [C(0b11, signed(2)), C(0b0011, unsigned(4))], C(1))\n\n def test_as_unsigned_lhs(self):\n stmt = lambda y, a: y.as_unsigned().eq(a)\n self.assertStatement(stmt, [C(0b01, unsigned(2))], C(0b0001, signed(4)))\n\n def test_as_signed(self):\n stmt = lambda y, a, b: y.eq(a.as_signed() == b)\n self.assertStatement(stmt, [C(0b01, unsigned(2)), C(0b0001, signed(4))], C(1))\n self.assertStatement(stmt, [C(0b11, unsigned(2)), C(0b1111, signed(4))], C(1))\n\n def test_as_signed_issue_502(self):\n stmt = lambda y, a: y.eq(a.as_signed())\n self.assertStatement(stmt, [C(0b01, unsigned(2))], C(0b0001, signed(4)))\n self.assertStatement(stmt, [C(0b11, unsigned(2))], C(0b1111, signed(4)))\n\n def test_as_signed_lhs(self):\n stmt = lambda y, a: y.as_signed().eq(a)\n self.assertStatement(stmt, [C(0b01, unsigned(2))], C(0b0001, signed(4)))\n\n def test_any(self):\n stmt = lambda y, a: y.eq(a.any())\n self.assertStatement(stmt, [C(0b00, 2)], C(0))\n self.assertStatement(stmt, [C(0b01, 2)], C(1))\n self.assertStatement(stmt, [C(0b10, 2)], C(1))\n self.assertStatement(stmt, [C(0b11, 2)], C(1))\n\n def test_all(self):\n stmt = lambda y, a: y.eq(a.all())\n self.assertStatement(stmt, [C(0b00, 2)], C(0))\n self.assertStatement(stmt, [C(0b01, 2)], C(0))\n self.assertStatement(stmt, [C(0b10, 2)], C(0))\n self.assertStatement(stmt, [C(0b11, 2)], C(1))\n\n def test_xor_unary(self):\n stmt = lambda y, a: y.eq(a.xor())\n self.assertStatement(stmt, [C(0b00, 2)], C(0))\n self.assertStatement(stmt, [C(0b01, 2)], C(1))\n self.assertStatement(stmt, [C(0b10, 2)], C(1))\n self.assertStatement(stmt, [C(0b11, 2)], C(0))\n\n def test_add(self):\n stmt = lambda y, a, b: y.eq(a + b)\n self.assertStatement(stmt, [C(0, 4), C(1, 4)], C(1, 4))\n self.assertStatement(stmt, [C(-5, 4), C(-5, 4)], C(-10, 5))\n\n def test_sub(self):\n stmt = lambda y, a, b: y.eq(a - b)\n self.assertStatement(stmt, [C(2, 4), C(1, 4)], C(1, 4))\n self.assertStatement(stmt, [C(0, 4), C(1, 4)], C(-1, 4))\n self.assertStatement(stmt, [C(0, 4), C(10, 4)], C(-10, 5))\n\n def test_mul(self):\n stmt = lambda y, a, b: y.eq(a * b)\n self.assertStatement(stmt, [C(2, 4), C(1, 4)], C(2, 8))\n self.assertStatement(stmt, [C(2, 4), C(2, 4)], C(4, 8))\n self.assertStatement(stmt, [C(7, 4), C(7, 4)], C(49, 8))\n\n def test_floordiv(self):\n stmt = lambda y, a, b: y.eq(a // b)\n self.assertStatement(stmt, [C(2, 4), C(1, 4)], C(2, 8))\n self.assertStatement(stmt, [C(2, 4), C(2, 4)], C(1, 8))\n self.assertStatement(stmt, [C(7, 4), C(2, 4)], C(3, 8))\n\n def test_floordiv_neg(self):\n stmt = lambda y, a, b: y.eq(a // b)\n self.assertStatement(stmt, [C(-5, 4), C( 2, 4)], C(-3, 8))\n self.assertStatement(stmt, [C(-5, 4), C(-2, 4)], C( 2, 8))\n self.assertStatement(stmt, [C( 5, 4), C( 2, 4)], C( 2, 8))\n self.assertStatement(stmt, [C( 5, 4), C(-2, 4)], C(-3, 8))\n\n def test_mod(self):\n stmt = lambda y, a, b: y.eq(a % b)\n self.assertStatement(stmt, [C(2, 4), C(0, 4)], C(0, 8))\n self.assertStatement(stmt, [C(2, 4), C(1, 4)], C(0, 8))\n self.assertStatement(stmt, [C(2, 4), C(2, 4)], C(0, 8))\n self.assertStatement(stmt, [C(7, 4), C(2, 4)], C(1, 8))\n\n def test_mod_neg(self):\n stmt = lambda y, a, b: y.eq(a % b)\n self.assertStatement(stmt, [C(-5, 4), C( 3, 4)], C( 1, 8))\n self.assertStatement(stmt, [C(-5, 4), C(-3, 4)], C(-2, 8))\n self.assertStatement(stmt, [C( 5, 4), C( 3, 4)], C( 2, 8))\n self.assertStatement(stmt, [C( 5, 4), C(-3, 4)], C(-1, 8))",
"start_line": 1,
"end_line": 150,
"total_lines": 998,
"is_truncated": true
}Generated tokens 62 tokens · stopped: STOP
`tests/test_hdl_mem.py` only does geometry and initialization tests.
Let's check `tests/test_sim.py`.
<channel|><|tool_call>call:read_file{filepath:<|"|>tests/test_sim.py<|"|>,start_line:1}<tool_call|><|tool_response>
Turn 13at 282 s45 tokens out9,205 prompt tokens
I don't see `TestCaseWithSimulator` here either. It might be 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 45 tokens · stopped: STOP
I don't see `TestCaseWithSimulator` here either. It might be in `tests/utils.py`.
<channel|><|tool_call>call:read_file{filepath:<|"|>tests/utils.py<|"|>}<tool_call|><|tool_response>
Turn 14at 328 s647 tokens out10,139 prompt tokens
Still not there. Maybe it's not a base class but a helper. Anyway, I can use `Simulator` from `amaranth.sim` to reproduce the bug. Let's try to build a reproduction script using the information from the issue. Reproduction case details: 1. `Memory(width=8, depth=4)` 2. Write `14` to address `2`. 3. Later read from address `1`. 4. Observation: `read_port.data` briefly returns `14` when it should be `0`. Let's write this in a script.
TOOL CALL · run_command
{
"command": "python3 - <<'PY'\nfrom amaranth.hdl import *\nfrom amaranth.sim import Simulator\n\nclass MemoryBug(Elaboratable):\n def __init__(self):\n self.mem = Memory(width=8, depth=4)\n self.read_port = self.mem.read_port()\n self.write_port = self.mem.write_port()\n\n def elaborate(self, platform):\n m = Module()\n return m\n\ndef test_memory_bug():\n dut = MemoryBug()\n sim = Simulator(dut)\n\n # Setup: Write 0 to all addresses (though they are 0 by default usually)\n for addr in range(4):\n dut.write_port.addr.eq(addr)\n dut.write_port.data.eq(0)\n dut.write_port.en.eq(1)\n sim.step()\n dut.write_port.en.eq(0)\n\n sim.step()\n\n # Cycle 2: write 14 to address 2\n print(\"Cycle 2: Writing 14 to address 2\")\n dut.write_port.addr.eq(2)\n dut.write_port.data.eq(14)\n dut.write_port.en.eq(1)\n sim.step()\n dut.write_port.en.eq(0)\n\n # Cycle 3: (Wait one cycle)\n print(\"Cycle 3: Idle\")\n sim.step()\n\n # Cycle 4: Read from address 1\n print(\"Cycle 4: Reading from address 1\")\n dut.read_port.addr.eq(1)\n sim.step()\n val = sim.get_value(dut.read_port.data)\n print(f\"Read address 1: {val}\")\n if val == 14:\n print(\"BUG REPRODUCED: Read address 1 returned 14!\")\n else:\n print(f\"Read address 1 returned {val}, bug not reproduced.\")\n\nif __name__ == \"__main__\":\n test_memory_bug()\nPY\n"
}Result of run_command 501 characters
{
"status": "error",
"error_type": "CommandError",
"error_message": "Traceback (most recent call last):\n File \"<stdin>\", line 52, in <module>\n File \"<stdin>\", line 23, in test_memory_bug\nAttributeError: 'Simulator' object has no attribute 'step'\n",
"details": {
"stdout": "",
"stderr": "Traceback (most recent call last):\n File \"<stdin>\", line 52, in <module>\n File \"<stdin>\", line 23, in test_memory_bug\nAttributeError: 'Simulator' object has no attribute 'step'\n",
"exit_code": 1
}
}Generated tokens 647 tokens · stopped: STOP
Still not there. Maybe it's not a base class but a helper.
Anyway, I can use `Simulator` from `amaranth.sim` to reproduce the bug.
Let's try to build a reproduction script using the information from the issue.
Reproduction case details:
1. `Memory(width=8, depth=4)`
2. Write `14` to address `2`.
3. Later read from address `1`.
4. Observation: `read_port.data` briefly returns `14` when it should be `0`.
Let's write this in a script.
<channel|><|tool_call>call:run_command{command:<|"|>python3 - <<'PY'
from amaranth.hdl import *
from amaranth.sim import Simulator
class MemoryBug(Elaboratable):
def __init__(self):
self.mem = Memory(width=8, depth=4)
self.read_port = self.mem.read_port()
self.write_port = self.mem.write_port()
def elaborate(self, platform):
m = Module()
return m
def test_memory_bug():
dut = MemoryBug()
sim = Simulator(dut)
# Setup: Write 0 to all addresses (though they are 0 by default usually)
for addr in range(4):
dut.write_port.addr.eq(addr)
dut.write_port.data.eq(0)
dut.write_port.en.eq(1)
sim.step()
dut.write_port.en.eq(0)
sim.step()
# Cycle 2: write 14 to address 2
print("Cycle 2: Writing 14 to address 2")
dut.write_port.addr.eq(2)
dut.write_port.data.eq(14)
dut.write_port.en.eq(1)
sim.step()
dut.write_port.en.eq(0)
# Cycle 3: (Wait one cycle)
print("Cycle 3: Idle")
sim.step()
# Cycle 4: Read from address 1
print("Cycle 4: Reading from address 1")
dut.read_port.addr.eq(1)
sim.step()
val = sim.get_value(dut.read_port.data)
print(f"Read address 1: {val}")
if val == 14:
print("BUG REPRODUCED: Read address 1 returned 14!")
else:
print(f"Read address 1 returned {val}, bug not reproduced.")
if __name__ == "__main__":
test_memory_bug()
PY
<|"|>}<tool_call|><|tool_response>
Turn 15at 352 s542 tokens out10,963 prompt tokens
Ah, `Simulator` doesn't have a `step()` method. I should use `sim.run()` with a process that uses `yield`. Let's refine the reproduction script to use `sim.run()` and processes.
TOOL CALL · run_command
{
"command": "python3 - <<'PY'\nfrom amaranth.hdl import *\nfrom amaranth.sim import Simulator\n\nclass MemoryBug(Elaboratable):\n def __init__(self):\n self.mem = Memory(width=8, depth=4)\n self.read_port = self.mem.read_port()\n self.write_port = self.mem.write_port()\n\n def elaborate(self, platform):\n return Module()\n\ndef test_memory_bug():\n dut = MemoryBug()\n sim = Simulator(dut)\n\n def process():\n # Initialize memory to 0\n for addr in range(4):\n dut.write_port.addr.eq(addr)\n dut.write_port.data.eq(0)\n dut.write_port.en.eq(1)\n yield\n dut.write_port.en.eq(0)\n\n yield\n\n # Cycle 2: write 14 to address 2\n print(\"Cycle 2: Writing 14 to address 2\")\n dut.write_port.addr.eq(2)\n dut.write_port.data.eq(14)\n dut.write_port.en.eq(1)\n yield\n dut.write_port.en.eq(0)\n\n # Cycle 3: Idle\n print(\"Cycle 3: Idle\")\n yield\n\n # Cycle 4: Read from address 1\n print(\"Cycle 4: Reading from address 1\")\n dut.read_port.addr.eq(1)\n yield\n val = yield dut.read_port.data\n print(f\"Read address 1: {val}\")\n if val == 14:\n print(\"BUG REPRODUCED: Read address 1 returned 14!\")\n else:\n print(f\"Read address 1 returned {val}, bug not reproduced.\")\n\n sim.add_process(process)\n sim.run()\n\nif __name__ == \"__main__\":\n test_memory_bug()\nPY\n"
}Result of run_command 2,181 characters
{
"status": "error",
"error_type": "CommandError",
"error_message": "Traceback (most recent call last):\n File \"<stdin>\", line 55, in <module>\n File \"<stdin>\", line 52, in test_memory_bug\n File \"/workspace/amaranth/sim/core.py\", line 172, in run\n while self.advance():\n File \"/workspace/amaranth/sim/core.py\", line 163, in advance\n return self._engine.advance()\n File \"/workspace/amaranth/sim/pysim.py\", line 319, in advance\n self._step()\n File \"/workspace/amaranth/sim/pysim.py\", line 308, in _step\n process.run()\n File \"/workspace/amaranth/sim/_pycoro.py\", line 125, in run\n self.coroutine.throw(exn)\n File \"/workspace/amaranth/sim/core.py\", line 82, in wrapper\n yield from process()\n File \"<stdin>\", line 23, in process\n File \"/workspace/amaranth/sim/_pycoro.py\", line 110, in run\n raise TypeError(\"Received default command from process {!r} that was added \"\nTypeError: Received default command from process '<stdin>:23' that was added with add_process(); did you mean to add this process with add_sync_process() instead?\n",
"details": {
"stdout": "",
"stderr": "Traceback (most recent call last):\n File \"<stdin>\", line 55, in <module>\n File \"<stdin>\", line 52, in test_memory_bug\n File \"/workspace/amaranth/sim/core.py\", line 172, in run\n while self.advance():\n File \"/workspace/amaranth/sim/core.py\", line 163, in advance\n return self._engine.advance()\n File \"/workspace/amaranth/sim/pysim.py\", line 319, in advance\n self._step()\n File \"/workspace/amaranth/sim/pysim.py\", line 308, in _step\n process.run()\n File \"/workspace/amaranth/sim/_pycoro.py\", line 125, in run\n self.coroutine.throw(exn)\n File \"/workspace/amaranth/sim/core.py\", line 82, in wrapper\n yield from process()\n File \"<stdin>\", line 23, in process\n File \"/workspace/amaranth/sim/_pycoro.py\", line 110, in run\n raise TypeError(\"Received default command from process {!r} that was added \"\nTypeError: Received default command from process '<stdin>:23' that was added with add_process(); did you mean to add this process with add_sync_process() instead?\n",
"exit_code": 1
}
}Generated tokens 542 tokens · stopped: STOP
Ah, `Simulator` doesn't have a `step()` method. I should use `sim.run()` with a process that uses `yield`.
Let's refine the reproduction script to use `sim.run()` and processes.
<channel|><|tool_call>call:run_command{command:<|"|>python3 - <<'PY'
from amaranth.hdl import *
from amaranth.sim import Simulator
class MemoryBug(Elaboratable):
def __init__(self):
self.mem = Memory(width=8, depth=4)
self.read_port = self.mem.read_port()
self.write_port = self.mem.write_port()
def elaborate(self, platform):
return Module()
def test_memory_bug():
dut = MemoryBug()
sim = Simulator(dut)
def process():
# Initialize memory to 0
for addr in range(4):
dut.write_port.addr.eq(addr)
dut.write_port.data.eq(0)
dut.write_port.en.eq(1)
yield
dut.write_port.en.eq(0)
yield
# Cycle 2: write 14 to address 2
print("Cycle 2: Writing 14 to address 2")
dut.write_port.addr.eq(2)
dut.write_port.data.eq(14)
dut.write_port.en.eq(1)
yield
dut.write_port.en.eq(0)
# Cycle 3: Idle
print("Cycle 3: Idle")
yield
# Cycle 4: Read from address 1
print("Cycle 4: Reading from address 1")
dut.read_port.addr.eq(1)
yield
val = yield dut.read_port.data
print(f"Read address 1: {val}")
if val == 14:
print("BUG REPRODUCED: Read address 1 returned 14!")
else:
print(f"Read address 1 returned {val}, bug not reproduced.")
sim.add_process(process)
sim.run()
if __name__ == "__main__":
test_memory_bug()
PY
<|"|>}<tool_call|><|tool_response>
Turn 16at 376 s609 tokens out12,260 prompt tokens
The error says: `TypeError: Received default command from process '<stdin>:23' that was added with add_process(); did you mean to add this process with add_sync_process() instead?` I should use `add_sync_process` instead of `add_process` because I'm using `yield` for clock cycles. Wait, `yield` in `add_process` is for `Settle()` or other commands. If I want to synchronize with the clock, I should use `add_sync_process`.
TOOL CALL · run_command
{
"command": "python3 - <<'PY'\nfrom amaranth.hdl import *\nfrom amaranth.sim import Simulator\n\nclass MemoryBug(Elaboratable):\n def __init__(self):\n self.mem = Memory(width=8, depth=4)\n self.read_port = self.mem.read_port()\n self.write_port = self.mem.write_port()\n\n def elaborate(self, platform):\n return Module()\n\ndef test_memory_bug():\n dut = MemoryBug()\n sim = Simulator(dut)\n\n def process():\n # Initialize memory to 0\n for addr in range(4):\n dut.write_port.addr.eq(addr)\n dut.write_port.data.eq(0)\n dut.write_port.en.eq(1)\n yield\n dut.write_port.en.eq(0)\n\n yield\n\n # Cycle 2: write 14 to address 2\n print(\"Cycle 2: Writing 14 to address 2\")\n dut.write_port.addr.eq(2)\n dut.write_port.data.eq(14)\n dut.write_port.en.eq(1)\n yield\n dut.write_port.en.eq(0)\n\n # Cycle 3: Idle\n print(\"Cycle 3: Idle\")\n yield\n\n # Cycle 4: Read from address 1\n print(\"Cycle 4: Reading from address 1\")\n dut.read_port.addr.eq(1)\n yield\n val = yield dut.read_port.data\n print(f\"Read address 1: {val}\")\n if val == 14:\n print(\"BUG REPRODUCED: Read address 1 returned 14!\")\n else:\n print(f\"Read address 1 returned {val}, bug not reproduced.\")\n\n sim.add_sync_process(process)\n sim.run()\n\nif __name__ == \"__main__\":\n test_memory_bug()\nPY\n"
}Result of run_command 2,019 characters
{
"status": "error",
"error_type": "CommandError",
"error_message": "Traceback (most recent call last):\n File \"<stdin>\", line 55, in <module>\n File \"<stdin>\", line 52, in test_memory_bug\n File \"/workspace/amaranth/sim/core.py\", line 172, in run\n while self.advance():\n File \"/workspace/amaranth/sim/core.py\", line 163, in advance\n return self._engine.advance()\n File \"/workspace/amaranth/sim/pysim.py\", line 319, in advance\n self._step()\n File \"/workspace/amaranth/sim/pysim.py\", line 308, in _step\n process.run()\n File \"/workspace/amaranth/sim/_pycoro.py\", line 125, in run\n self.coroutine.throw(exn)\n File \"/workspace/amaranth/sim/core.py\", line 90, in wrapper\n yield Tick(domain)\n File \"/workspace/amaranth/sim/_pycoro.py\", line 85, in run\n raise NameError(\"Received command {!r} that refers to a nonexistent \"\nNameError: Received command (tick sync) that refers to a nonexistent domain 'sync' from process '/workspace/amaranth/sim/core.py:90'\n",
"details": {
"stdout": "",
"stderr": "Traceback (most recent call last):\n File \"<stdin>\", line 55, in <module>\n File \"<stdin>\", line 52, in test_memory_bug\n File \"/workspace/amaranth/sim/core.py\", line 172, in run\n while self.advance():\n File \"/workspace/amaranth/sim/core.py\", line 163, in advance\n return self._engine.advance()\n File \"/workspace/amaranth/sim/pysim.py\", line 319, in advance\n self._step()\n File \"/workspace/amaranth/sim/pysim.py\", line 308, in _step\n process.run()\n File \"/workspace/amaranth/sim/_pycoro.py\", line 125, in run\n self.coroutine.throw(exn)\n File \"/workspace/amaranth/sim/core.py\", line 90, in wrapper\n yield Tick(domain)\n File \"/workspace/amaranth/sim/_pycoro.py\", line 85, in run\n raise NameError(\"Received command {!r} that refers to a nonexistent \"\nNameError: Received command (tick sync) that refers to a nonexistent domain 'sync' from process '/workspace/amaranth/sim/core.py:90'\n",
"exit_code": 1
}
}Generated tokens 609 tokens · stopped: STOP
The error says: `TypeError: Received default command from process '<stdin>:23' that was added with add_process(); did you mean to add this process with add_sync_process() instead?`
I should use `add_sync_process` instead of `add_process` because I'm using `yield` for clock cycles.
Wait, `yield` in `add_process` is for `Settle()` or other commands. If I want to synchronize with the clock, I should use `add_sync_process`.
<channel|><|tool_call>call:run_command{command:<|"|>python3 - <<'PY'
from amaranth.hdl import *
from amaranth.sim import Simulator
class MemoryBug(Elaboratable):
def __init__(self):
self.mem = Memory(width=8, depth=4)
self.read_port = self.mem.read_port()
self.write_port = self.mem.write_port()
def elaborate(self, platform):
return Module()
def test_memory_bug():
dut = MemoryBug()
sim = Simulator(dut)
def process():
# Initialize memory to 0
for addr in range(4):
dut.write_port.addr.eq(addr)
dut.write_port.data.eq(0)
dut.write_port.en.eq(1)
yield
dut.write_port.en.eq(0)
yield
# Cycle 2: write 14 to address 2
print("Cycle 2: Writing 14 to address 2")
dut.write_port.addr.eq(2)
dut.write_port.data.eq(14)
dut.write_port.en.eq(1)
yield
dut.write_port.en.eq(0)
# Cycle 3: Idle
print("Cycle 3: Idle")
yield
# Cycle 4: Read from address 1
print("Cycle 4: Reading from address 1")
dut.read_port.addr.eq(1)
yield
val = yield dut.read_port.data
print(f"Read address 1: {val}")
if val == 14:
print("BUG REPRODUCED: Read address 1 returned 14!")
else:
print(f"Read address 1 returned {val}, bug not reproduced.")
sim.add_sync_process(process)
sim.run()
if __name__ == "__main__":
test_memory_bug()
PY
<|"|>}<tool_call|><|tool_response>
Turn 17at 390 s162 tokens out13,588 prompt tokens
`NameError: Received command (tick sync) that refers to a nonexistent domain 'sync'`. Ah, the `Module` is empty, so it doesn't have any clocks. I need to add a clock domain to the module. Actually, `Memory` ports use the "sync" domain by default. The `Simulator` needs to know about this domain. Usually, I add a `ClockDomain` to the `Module`.
TOOL CALL · run_command
{
"command": "python3 - <<'PY'\nfrom amaranth.hdl import *\nfrom amamaranth.sim import Simulator # Typo here, should be amaranth.sim\n\n# Wait, let me fix the typo and add the clock domain.\nPY\n"
}Result of run_command 383 characters
{
"status": "error",
"error_type": "CommandError",
"error_message": "Traceback (most recent call last):\n File \"<stdin>\", line 2, in <module>\nModuleNotFoundError: No module named 'amamaranth'\n",
"details": {
"stdout": "",
"stderr": "Traceback (most recent call last):\n File \"<stdin>\", line 2, in <module>\nModuleNotFoundError: No module named 'amamaranth'\n",
"exit_code": 1
}
}Generated tokens 162 tokens · stopped: STOP
`NameError: Received command (tick sync) that refers to a nonexistent domain 'sync'`.
Ah, the `Module` is empty, so it doesn't have any clocks. I need to add a clock domain to the module.
Actually, `Memory` ports use the "sync" domain by default. The `Simulator` needs to know about this domain.
Usually, I add a `ClockDomain` to the `Module`.
<channel|><|tool_call>call:run_command{command:<|"|>python3 - <<'PY'
from amaranth.hdl import *
from amamaranth.sim import Simulator # Typo here, should be amaranth.sim
# Wait, let me fix the typo and add the clock domain.
PY
<|"|>}<tool_call|><|tool_response>
Turn 18at 409 s538 tokens out13,879 prompt tokens
Correcting the reproduction script again. I'll add a `ClockDomain("sync")` to the module.
TOOL CALL · run_command
{
"command": "python3 - <<'PY'\nfrom amaranth.hdl import *\nfrom amaranth.sim import Simulator\n\nclass MemoryBug(Elaboratable):\n def __init__(self):\n self.mem = Memory(width=8, depth=4)\n self.read_port = self.mem.read_port()\n self.write_port = self.mem.write_port()\n\n def elaborate(self, platform):\n m = Module()\n m.add_clock_domain(ClockDomain(\"sync\"))\n return m\n\ndef test_memory_bug():\n dut = MemoryBug()\n sim = Simulator(dut)\n\n def process():\n # Initialize memory to 0\n for addr in range(4):\n dut.write_port.addr.eq(addr)\n dut.write_port.data.eq(0)\n dut.write_port.en.eq(1)\n yield\n dut.write_port.en.eq(0)\n\n yield\n\n # Cycle 2: write 14 to address 2\n print(\"Cycle 2: Writing 14 to address 2\")\n dut.write_port.addr.eq(2)\n dut.write_port.data.eq(14)\n dut.write_port.en.eq(1)\n yield\n dut.write_port.en.eq(0)\n\n # Cycle 3: Idle\n print(\"Cycle 3: Idle\")\n yield\n\n # Cycle 4: Read from address 1\n print(\"Cycle 4: Reading from address 1\")\n dut.read_port.addr.eq(1)\n yield\n val = yield dut.read_port.data\n print(f\"Read address 1: {val}\")\n if val == 14:\n print(\"BUG REPRODUCED: Read address 1 returned 14!\")\n else:\n print(f\"Read address 1 returned {val}, bug not reproduced.\")\n\n sim.add_sync_process(process)\n sim.run()\n\nif __name__ == \"__main__\":\n test_memory_bug()\nPY\n"
}Result of run_command 1,337 characters
{
"status": "error",
"error_type": "CommandError",
"error_message": "Traceback (most recent call last):\n File \"<stdin>\", line 57, in <module>\n File \"<stdin>\", line 17, in test_memory_bug\n File \"/workspace/amaranth/sim/core.py\", line 67, in __init__\n self._fragment = Fragment.get(fragment, platform=None).prepare()\n File \"/workspace/amaranth/hdl/ir.py\", line 42, in get\n new_obj = obj.elaborate(platform)\n File \"<stdin>\", line 12, in elaborate\n File \"/workspace/amaranth/hdl/dsl.py\", line 79, in __getattr__\n raise AttributeError(\"'{}' object has no attribute '{}'\"\nAttributeError: 'Module' object has no attribute 'add_clock_domain'\n",
"details": {
"stdout": "",
"stderr": "Traceback (most recent call last):\n File \"<stdin>\", line 57, in <module>\n File \"<stdin>\", line 17, in test_memory_bug\n File \"/workspace/amaranth/sim/core.py\", line 67, in __init__\n self._fragment = Fragment.get(fragment, platform=None).prepare()\n File \"/workspace/amaranth/hdl/ir.py\", line 42, in get\n new_obj = obj.elaborate(platform)\n File \"<stdin>\", line 12, in elaborate\n File \"/workspace/amaranth/hdl/dsl.py\", line 79, in __getattr__\n raise AttributeError(\"'{}' object has no attribute '{}'\"\nAttributeError: 'Module' object has no attribute 'add_clock_domain'\n",
"exit_code": 1
}
}Generated tokens 538 tokens · stopped: STOP
Correcting the reproduction script again. I'll add a `ClockDomain("sync")` to the module.
<channel|><|tool_call>call:run_command{command:<|"|>python3 - <<'PY'
from amaranth.hdl import *
from amaranth.sim import Simulator
class MemoryBug(Elaboratable):
def __init__(self):
self.mem = Memory(width=8, depth=4)
self.read_port = self.mem.read_port()
self.write_port = self.mem.write_port()
def elaborate(self, platform):
m = Module()
m.add_clock_domain(ClockDomain("sync"))
return m
def test_memory_bug():
dut = MemoryBug()
sim = Simulator(dut)
def process():
# Initialize memory to 0
for addr in range(4):
dut.write_port.addr.eq(addr)
dut.write_port.data.eq(0)
dut.write_port.en.eq(1)
yield
dut.write_port.en.eq(0)
yield
# Cycle 2: write 14 to address 2
print("Cycle 2: Writing 14 to address 2")
dut.write_port.addr.eq(2)
dut.write_port.data.eq(14)
dut.write_port.en.eq(1)
yield
dut.write_port.en.eq(0)
# Cycle 3: Idle
print("Cycle 3: Idle")
yield
# Cycle 4: Read from address 1
print("Cycle 4: Reading from address 1")
dut.read_port.addr.eq(1)
yield
val = yield dut.read_port.data
print(f"Read address 1: {val}")
if val == 14:
print("BUG REPRODUCED: Read address 1 returned 14!")
else:
print(f"Read address 1 returned {val}, bug not reproduced.")
sim.add_sync_process(process)
sim.run()
if __name__ == "__main__":
test_memory_bug()
PY
<|"|>}<tool_call|><|tool_response>
Turn 19at 446 s872 tokens out14,882 prompt tokens
My mistake, `Module` doesn't have `add_clock_domain`. I should just add `ClockDomain("sync")` to the `elaborate` method.
Actually, the way to add a clock domain is:
```python
def elaborate(self, platform):
m = Module()
m.domains.add("sync")
return m
```
Wait, no, it's usually:
```python
def elaborate(self, platform):
return Module(domains=[ClockDomain("sync")])
```
Or just let the `Memory` instantiate its own domain if it's the only thing.
Actually, in `amaranth`, you can just do:
```python
def elaborate(self, platform):
m = Module()
m.domains.add(ClockDomain("sync"))
return m
```
No, that's not right either.
Let's check how other tests do it. I'll check `tests/test_sim.py` again.
Wait, `tests/test_sim.py` doesn't seem to have `Module`s with clock domains in the snippets I saw.
Actually:
```python
def assertStatement(self, stmt, inputs, output, reset=0):
# ...
sim = Simulator(frag)
def process():
# ...
yield Settle()
self.assertEqual((yield osig), output.value)
sim.add_process(process)
```
It uses `add_process` and `Settle()`.
Let's try `add_process` and `yield Settle()`.
TOOL CALL · run_command
{
"command": "python3 - <<'PY'\nfrom amaranth.hdl import *\nfrom amaranth.sim import Simulator\n\nclass MemoryBug(Elaboratable):\n def __init__(self):\n self.mem = Memory(width=8, depth=4)\n self.read_port = self.mem.read_port()\n self.write_port = self.mem.write_port()\n\n def elaborate(self, platform):\n return Module()\n\ndef test_memory_bug():\n dut = MemoryBug()\n sim = Simulator(dut)\n\n def process():\n # Initialize memory to 0\n for addr in range(4):\n dut.write_port.addr.eq(addr)\n dut.write_port.data.eq(0)\n dut.write_port.en.eq(1)\n yield Settle()\n dut.write_port.en.eq(0)\n\n yield Settle()\n\n # Cycle 2: write 14 to address 2\n print(\"Cycle 2: Writing 14 to address 2\")\n dut.write_port.addr.eq(2)\n dut.write_port.data.eq(14)\n dut.write_port.en.eq(1)\n yield Settle()\n dut.write_port.en.eq(0)\n\n # Cycle 3: Idle\n print(\"Cycle 3: Idle\")\n yield Settle()\n\n # Cycle 4: Read from address 1\n print(\"Cycle 4: Reading from address 1\")\n dut.read_port.addr.eq(1)\n yield Settle()\n val = yield dut.read_port.data\n print(f\"Read address 1: {val}\")\n if val == 14:\n print(\"BUG REPRODUCED: Read address 1 returned 14!\")\n else:\n print(f\"Read address 1 returned {val}, bug not reproduced.\")\n\n sim.add_process(process)\n sim.run()\n\nif __name__ == \"__main__\":\n test_memory_bug()\nPY\n"
}Result of run_command 1,855 characters
{
"status": "error",
"error_type": "CommandError",
"error_message": "Traceback (most recent call last):\n File \"<stdin>\", line 55, in <module>\n File \"<stdin>\", line 52, in test_memory_bug\n File \"/workspace/amaranth/sim/core.py\", line 172, in run\n while self.advance():\n File \"/workspace/amaranth/sim/core.py\", line 163, in advance\n return self._engine.advance()\n File \"/workspace/amaranth/sim/pysim.py\", line 319, in advance\n self._step()\n File \"/workspace/amaranth/sim/pysim.py\", line 308, in _step\n process.run()\n File \"/workspace/amaranth/sim/_pycoro.py\", line 125, in run\n self.coroutine.throw(exn)\n File \"/workspace/amaranth/sim/_pycoro.py\", line 64, in run\n command = self.coroutine.send(response)\n File \"/workspace/amaranth/sim/core.py\", line 82, in wrapper\n yield from process()\n File \"<stdin>\", line 23, in process\nNameError: name 'Settle' is not defined\n",
"details": {
"stdout": "",
"stderr": "Traceback (most recent call last):\n File \"<stdin>\", line 55, in <module>\n File \"<stdin>\", line 52, in test_memory_bug\n File \"/workspace/amaranth/sim/core.py\", line 172, in run\n while self.advance():\n File \"/workspace/amaranth/sim/core.py\", line 163, in advance\n return self._engine.advance()\n File \"/workspace/amaranth/sim/pysim.py\", line 319, in advance\n self._step()\n File \"/workspace/amaranth/sim/pysim.py\", line 308, in _step\n process.run()\n File \"/workspace/amaranth/sim/_pycoro.py\", line 125, in run\n self.coroutine.throw(exn)\n File \"/workspace/amaranth/sim/_pycoro.py\", line 64, in run\n command = self.coroutine.send(response)\n File \"/workspace/amaranth/sim/core.py\", line 82, in wrapper\n yield from process()\n File \"<stdin>\", line 23, in process\nNameError: name 'Settle' is not defined\n",
"exit_code": 1
}
}Generated tokens 872 tokens · stopped: STOP
My mistake, `Module` doesn't have `add_clock_domain`. I should just add `ClockDomain("sync")` to the `elaborate` method.
Actually, the way to add a clock domain is:
```python
def elaborate(self, platform):
m = Module()
m.domains.add("sync")
return m
```
Wait, no, it's usually:
```python
def elaborate(self, platform):
return Module(domains=[ClockDomain("sync")])
```
Or just let the `Memory` instantiate its own domain if it's the only thing.
Actually, in `amaranth`, you can just do:
```python
def elaborate(self, platform):
m = Module()
m.domains.add(ClockDomain("sync"))
return m
```
No, that's not right either.
Let's check how other tests do it. I'll check `tests/test_sim.py` again.
Wait, `tests/test_sim.py` doesn't seem to have `Module`s with clock domains in the snippets I saw.
Actually:
```python
def assertStatement(self, stmt, inputs, output, reset=0):
# ...
sim = Simulator(frag)
def process():
# ...
yield Settle()
self.assertEqual((yield osig), output.value)
sim.add_process(process)
```
It uses `add_process` and `Settle()`.
Let's try `add_process` and `yield Settle()`.
<channel|><|tool_call>call:run_command{command:<|"|>python3 - <<'PY'
from amaranth.hdl import *
from amaranth.sim import Simulator
class MemoryBug(Elaboratable):
def __init__(self):
self.mem = Memory(width=8, depth=4)
self.read_port = self.mem.read_port()
self.write_port = self.mem.write_port()
def elaborate(self, platform):
return Module()
def test_memory_bug():
dut = MemoryBug()
sim = Simulator(dut)
def process():
# Initialize memory to 0
for addr in range(4):
dut.write_port.addr.eq(addr)
dut.write_port.data.eq(0)
dut.write_port.en.eq(1)
yield Settle()
dut.write_port.en.eq(0)
yield Settle()
# Cycle 2: write 14 to address 2
print("Cycle 2: Writing 14 to address 2")
dut.write_port.addr.eq(2)
dut.write_port.data.eq(14)
dut.write_port.en.eq(1)
yield Settle()
dut.write_port.en.eq(0)
# Cycle 3: Idle
print("Cycle 3: Idle")
yield Settle()
# Cycle 4: Read from address 1
print("Cycle 4: Reading from address 1")
dut.read_port.addr.eq(1)
yield Settle()
val = yield dut.read_port.data
print(f"Read address 1: {val}")
if val == 14:
print("BUG REPRODUCED: Read address 1 returned 14!")
else:
print(f"Read address 1 returned {val}, bug not reproduced.")
sim.add_process(process)
sim.run()
if __name__ == "__main__":
test_memory_bug()
PY
<|"|>}<tool_call|><|tool_response>
Patch, tests and logs
Final code change Included
Test output Missing
Not saved for this rollout. Nothing has been inferred or reconstructed.
Test errors Missing
Not saved for this rollout. Nothing has been inferred or reconstructed.
Test report (JUnit) Missing
Not saved for this rollout. Nothing has been inferred or reconstructed.
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.
[ 98.1s] 💭 (4938 chars) "The user is reporting a bug in `Memory` simulation in Amaranth.
It seems that writing to one address affects the data re..."
[ 98.1s] 🔧 run_command grep -rn "Memory" amaranth/sim
[ 98.1s] → error (exit 0):
[ 103.4s] 💭 (190 chars) "Ah, maybe it's not explicitly mentioned as "Memory" but handled via some general mechanism
for memories or it's in `amar..."
[ 103.4s] 🔧 run_command grep -rn --include="*.py" "Memory" amaranth/ | head -n 20
[ 103.4s] → amaranth/compat/fhdl/specials.py:6:from ...hdl.mem import Memory as NativeMemory
[ 108.5s] 💭 (261 chars) "Wait, I searched `amaranth/sim` and got an error. Let me try `grep -rn "Memory"
amaranth/sim` again, maybe I made a mist..."
[ 108.5s] 🔧 run_command ls -R amaranth/sim
[ 108.5s] → amaranth/sim:
[ 110.8s] 💭 (63 chars) "Let's search for "read_port" or "write_port" in `amaranth/sim`."
[ 110.8s] 🔧 run_command grep -rn "port" amaranth/sim
[ 110.8s] → amaranth/sim/_pycoro.py:1:import inspect
[ 116.5s] 💭 (266 chars) "Still nothing specifically about `Memory` simulation.
Wait, how does Amaranth simulate memory?
Usually, `Memory` is a sp..."
[ 116.5s] 📖 read_file (amaranth/hdl/mem.py)
[ 116.6s] ✓ {'status': 'ok', 'filepath': 'amaranth/hdl/mem.py', 'content': 'import operator\nfrom collections import
OrderedDict\n\n…
[ 127.1s] 💭 (482 chars) "In `Memory.__init__`, we see:
```python
# Array of signals for simulation.
self._array = Array()
..."
[ 127.1s] 📖 read_file (amaranth/hdl/mem.py)
[ 127.1s] ✓ {'status': 'ok', 'filepath': 'amaranth/hdl/mem.py', 'content': 'import operator\nfrom collections import
OrderedDict\n\n…
[ 151.8s] 💭 (979 chars) "Wait, I called `read_file` with `start_line=151` but the output is still starting from line
1.
Looking at the response:
..."
[ 151.8s] 📖 read_file (amaranth/hdl/mem.py)
[ 151.8s] ✓ {'status': 'ok', 'filepath': 'amaranth/hdl/mem.py', 'content': ' p_RD_ARST_VALUE=Const(0,
len(self._read_port…
[ 155.7s] 💭 (33 chars) "And finally, the end of the file:"
[ 155.7s] 📖 read_file (amaranth/hdl/mem.py)
[ 155.7s] ✓ {'status': 'ok', 'filepath': 'amaranth/hdl/mem.py', 'content': ' def __init__(self, memory, *,
domain="sync", granula…
[ 223.1s] 💭 (3571 chars) "Okay, I've read `amaranth/hdl/mem.py`.
The `Memory.elaborate` method defines how memory is simulated using an array of s..."
[ 223.1s] 🔧 run_command grep -rn "class TestCaseWithSimulator" .
[ 223.2s] → error (exit 0):
[ 225.8s] 💭 (81 chars) "It's not in the source. It must be in the tests.
Let me check `tests/` directory."
[ 225.8s] 🔧 run_command ls tests/
[ 225.8s] → __init__.py
[ 275.1s] 💭 (66 chars) "Let's look at `tests/test_hdl_mem.py` to see how memory is tested."
[ 275.1s] 📖 read_file (tests/test_hdl_mem.py)
[ 275.1s] ✓ {'status': 'ok', 'filepath': 'tests/test_hdl_mem.py', 'content': '# amaranth:
UnusedElaboratable=no\n\nfrom amaranth.hdl…
[ 278.2s] 💭 (101 chars) "`tests/test_hdl_mem.py` only does geometry and initialization tests.
Let's check `tests/test_sim.py`."
[ 278.2s] 📖 read_file (tests/test_sim.py)
[ 278.3s] ✓ {'status': 'ok', 'filepath': 'tests/test_sim.py', 'content': 'import os\nimport warnings\nfrom
contextlib import context…
[ 281.9s] 💭 (81 chars) "I don't see `TestCaseWithSimulator` here either. It might be in `tests/utils.py`."
[ 281.9s] 📖 read_file (tests/utils.py)
[ 282.0s] ✓ {'status': 'ok', 'filepath': 'tests/utils.py', 'content': 'import os\nimport re\nimport shutil\nimport
subprocess\nimpor…
[ 328.0s] 💭 (438 chars) "Still not there. Maybe it's not a base class but a helper.
Anyway, I can use `Simulator` from `amaranth.sim` to reproduc..."
[ 328.0s] 🔧 run_command (54 lines) python3 - <<'PY'
[ 328.2s] → error (exit 0):
[ 351.7s] 💭 (178 chars) "Ah, `Simulator` doesn't have a `step()` method. I should use `sim.run()` with a process that
uses `yield`.
Let's refine..."
[ 351.7s] 🔧 run_command (57 lines) python3 - <<'PY'
[ 351.8s] → error (exit 0):
[ 375.9s] 💭 (424 chars) "The error says: `TypeError: Received default command from process '<stdin>:23' that was
added with add_process(); did yo..."
[ 375.9s] 🔧 run_command (57 lines) python3 - <<'PY'
[ 376.0s] → error (exit 0):
[ 390.0s] 💭 (344 chars) "`NameError: Received command (tick sync) that refers to a nonexistent domain 'sync'`.
Ah, the `Module` is empty, so it d..."
[ 390.0s] 🔧 run_command (6 lines) python3 - <<'PY'
[ 390.1s] → error (exit 0):
[ 408.8s] 💭 (89 chars) "Correcting the reproduction script again. I'll add a `ClockDomain("sync")` to the module."
[ 408.8s] 🔧 run_command (59 lines) python3 - <<'PY'
[ 408.8s] → error (exit 0):
[ 446.1s] 💭 (1231 chars) "My mistake, `Module` doesn't have `add_clock_domain`. I should just add
`ClockDomain("sync")` to the `elaborate` method...."
[ 446.1s] 🔧 run_command (57 lines) python3 - <<'PY'
[ 446.1s] → error (exit 0):
Native result row
{
"agent_error": "Agent exceeded session timeout (7.5 min)",
"duration_seconds": 452.84,
"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": 452.84,
"repo": "amaranth-lang/amaranth",
"request_log_path": "/kaggle-root/working/r31/rollouts_X/requests/amaranth-lang__amaranth-923__p0__r1.jsonl",
"resolved": false,
"rollout_idx": 1,
"run_key": "amaranth-lang__amaranth-923__p0__r1",
"strict_clean_patch": false,
"tool_calls": 19,
"total_llm_calls": 19,
"trace_path": "/kaggle-root/working/r31/rollouts_X/traces/trace_amaranth-lang__amaranth-923__p0__r1.json"
}