The switch cases (really TARGET(opcode) macros) have been moved from ceval.c to generated_cases.c.h. That file is generated from instruction definitions in bytecodes.c (which impersonates a C file so the C code it contains can be edited without custom support in e.g. VS Code).

The code generator lives in Tools/cases_generator (it has a README.md explaining how it works). The DSL used to describe the instructions is a work in progress, described in https://github.com/faster-cpython/ideas/blob/main/3.12/interpreter_definition.md.

This is surely a work-in-progress. An easy next step could be auto-generating super-instructions.

**IMPORTANT: Merge Conflicts**

If you get a merge conflict for instruction implementations in ceval.c, your best bet is to port your changes to bytecodes.c. That file looks almost the same as the original cases, except instead of `TARGET(NAME)` it uses `inst(NAME)`, and the trailing `DISPATCH()` call is omitted (the code generator adds it automatically).

Debt I owe from PR GH-98830.

Co-authored-by: Brandt Bucher <brandtbucher@gmail.com>

…rnings. (#99093)

Co-authored-by: C.A.M. Gerlach <CAM.Gerlach@Gerlach.CAM>

)

Also mark those opcodes that have no stack effect as such.

Co-authored-by: Brandt Bucher <brandtbucher@gmail.com>

python#99271)

Also mark those opcodes that have no stack effect as such.

Co-authored-by: Brandt Bucher <brandtbucher@gmail.com>

python#99271)

Also mark those opcodes that have no stack effect as such.

Co-authored-by: Brandt Bucher <brandtbucher@gmail.com>

…le opcodes in the instruction definition DSL

…odes in the instruction definition DSL (#101443)

…struction definition DSL

…ython#101309)

…SL (python#101306)

Fix two bugs in case generator

- UndefinedLocalError when generating metadata for an 'op'
- Accidental newline inserted in test_generator.py

…n#101333)

…ython#101442)

…le opcodes in the instruction definition DSL (python#101443)

…ion definition DSL (#101458)

* main:
  pythongh-101440: fix json snippet error in logging-cookbook.rst (python#101439)
  pythongh-99276 - Updated Doc/faq/general.rst (python#101396)
  Add JOBS parameter to docs Makefile (python#101395)
  pythongh-98831: rewrite GET_LEN, GET_ITER, BEFORE_WITH and a few simple opcodes in the instruction definition DSL (python#101443)
  pythongh-77607: Improve accuracy of os.path.join docs (python#101406)
  Fixes typo in asyncio.TaskGroup context manager code example (python#101449)
  pythongh-98831: Clean up and add cache size static_assert to macro (python#101442)
  pythongh-99955: use SUCCESS/ERROR return values in optimizer and assembler. Use RETURN_IF_ERROR where appropriate. Fix a couple of bugs. (python#101412)

* main:
  pythonGH-100288: Skip extra work when failing to specialize LOAD_ATTR (pythonGH-101354)
  pythongh-101409: Improve generated clinic code for self type checks (python#101411)
  pythongh-98831: rewrite BEFORE_ASYNC_WITH and END_ASYNC_FOR in the instruction definition DSL (python#101458)
  pythongh-101469: Optimise get_io_state() by using _PyModule_GetState() (pythonGH-101470)

…ion definition DSL (#101481)

* main:
  pythongh-98831: rewrite PUSH_EXC_INFO and conditional jumps in the instruction definition DSL (python#101481)
  pythongh-98831: Modernize the LOAD_ATTR family (python#101488)
  pythongh-101498 : Fix asyncio.Timeout example in docs (python#101499)
  pythongh-101454: fix documentation for END_ASYNC_FOR (python#101455)
  pythongh-101277: Isolate itertools, add group and _grouper types to module state (python#101302)
  pythongh-101317: Add `ssl_shutdown_timeout` parameter for `asyncio.StreamWriter.start_tls` (python#101335)
  datetime.rst: fix combine() signature (python#101490)

…tion DSL (#101511)

…instruction definition DSL (#101516)

…n the instruction definition DSL (python#101516)

…finition DSL (#101529)