8000 gh-95913: Edit, expand & format Bytecode sect in 3.11 WhatsNew by CAM-Gerlach · Pull Request #98559 · python/cpython · GitHub
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gh-95913: Edit, expand & format Bytecode sect in 3.11 WhatsNew #98559

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Merged
merged 13 commits into from
Oct 24, 2022
Merged

gh-95913: Edit, expand & format Bytecode sect in 3.11 WhatsNew #98559

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48a18d5
Fix Sphinx syntax in bytecode section and tweak phrasing
CAM-Gerlach Oct 20, 2022
4a3d830
Use clear, consistant phrasing on all Bytecode entries
CAM-Gerlach Oct 20, 2022
611a628
Re-order opcode changes to Added, Replaced, Removed, Changed
CAM-Gerlach Oct 20, 2022
68bef2a
Add missing added and removed opcodes to section
CAM-Gerlach Oct 21, 2022
f34698c
Add table with all added/replace/removed opcodes
CAM-Gerlach Oct 22, 2022
650b4e4
Merge opcode information from list into tables
CAM-Gerlach Oct 22, 2022
87e06bb
Add exception reprisentation change to Changed Opcodes
CAM-Gerlach Oct 23, 2022
9c165b8
Unify & simplify added and replaced tables & entries
CAM-Gerlach Oct 23, 2022
1e0d7cb
Move added opcodes out of table into a bulleted list instead
CAM-Gerlach Oct 23, 2022
a0b90d8
Re-order Replaced Opcodes table by replaced opcode
CAM-Gerlach Oct 23, 2022
4ed6cfb
Consolidate changed and removed sections to be more concise
CAM-Gerlach Oct 23, 2022
7c94ab0
Consolidate jump opcode changes further
CAM-Gerlach Oct 23, 2022
c1a7743
CHECK_EG_MATCH is new
iritkatriel Oct 24, 2022
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Use clear, consistant phrasing on all Bytecode entries
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@CAM-Gerlach
CAM-Gerlach committed Oct 20, 2022
commit 4a3d83028b716f5328583e92f5efe8fe1d50b557
23 changes: 11 additions & 12 deletions Doc/whatsnew/3.11.rst
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Expand Up @@ -1426,21 +1426,20 @@ CPython bytecode changes

* Removed :opcode:`!COPY_DICT_WITHOUT_KEYS` and :opcode:`!GEN_START`.

* :opcode:`MATCH_CLASS` and :opcode:`MATCH_KEYS` no longer push an additional
boolean value indicating whether the match succeeded or failed. Instead, they
indicate failure with ``None`` (where a tuple of extracted values would
otherwise be).
* Changed :opcode:`MATCH_CLASS` and :opcode:`MATCH_KEYS`
to no longer push an additional boolean value
indicating whether the match succeeded or failed.
Instead, they indicate failure with ``None``
(where a tuple of extracted values would otherwise be).

* Replaced several stack manipulation instructions
(:opcode:`!DUP_TOP`, :opcode:`!DUP_TOP_TWO`, :opcode:`!ROT_TWO`,
:opcode:`!ROT_THREE`, :opcode:`!ROT_FOUR`, and :opcode:`!ROT_N`)
with new :opcode:`COPY` and :opcode:`SWAP` instructions.

* Replaced :opcode:`!JUMP_IF_NOT_EXC_MATCH` by :opcode:`CHECK_EXC_MATCH`, which
performs the check but does not jump.

* Replaced :opcode:`!JUMP_IF_NOT_EG_MATCH` by :opcode:`CHECK_EG_MATCH` which
performs the check but does not jump.
* Replaced :opcode:`!JUMP_IF_NOT_EXC_MATCH` with :opcode:`CHECK_EXC_MATCH`
and :opcode:`!JUMP_IF_NOT_EG_MATCH` with :opcode:`CHECK_EG_MATCH`,
which perform the check but do not jump.

* Replaced :opcode:`!JUMP_ABSOLUTE` by the relative :opcode:`JUMP_BACKWARD`.

Expand All @@ -1457,10 +1456,10 @@ CPython bytecode changes
:opcode:`POP_JUMP_FORWARD_IF_NONE` and :opcode:`POP_JUMP_BACKWARD_IF_NONE`
opcodes to speed up conditional jumps.

* :opcode:`JUMP_IF_TRUE_OR_POP` and :opcode:`JUMP_IF_FALSE_OR_POP` are now
relative rather than absolute.
* Changed :opcode:`JUMP_IF_TRUE_OR_POP` and :opcode:`JUMP_IF_FALSE_OR_POP`
to now be relative rather than absolute.

* :opcode:`RESUME` has been added. It is a no-op,
* Added the :opcode:`RESUME` opcode. It is a no-op,
and performs internal tracing, debugging and optimization checks.


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