8000 bpo-43693: Add the MAKE_CELL opcode and interleave fast locals offsets. by ericsnowcurrently · Pull Request #26396 · python/cpython · GitHub
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bpo-43693: Add the MAKE_CELL opcode and interleave fast locals offsets. #26396

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Merged
merged 14 commits into from
Jun 7, 2021
Merged

bpo-43693: Add the MAKE_CELL opcode and interleave fast locals offsets. #26396

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110a891
Add the MAKE_CELL opcode.
ericsnowcurrently May 5, 2021
4d1056b
Insert MAKE_CELL for each cellvar.
ericsnowcurrently May 7, 2021
e18489b
Implement MAKE_CELL.
ericsnowcurrently May 7, 2021
21acbc2
Add a NEWS entry.
ericsnowcurrently May 27, 2021
167cdc1
Update the dis docs.
ericsnowcurrently May 27, 2021
409b92a
offset_derefs() -> fix_cell_offsets().
ericsnowcurrently May 10, 2021
da503d0
Mark MAKE_CELL as "hasfree".
ericsnowcurrently May 27, 2021
1a8400e
Drop _Py_MAX_OPARG (and add a note about max oparg size).
ericsnowcurrently Jun 4, 2021
09f718f
Update the NEWS entry.
ericsnowcurrently Jun 4, 2021
cd2508f
Add some explicit casts to int.
ericsnowcurrently Jun 4, 2021
362088d
Do not create cells in PyFrame_LocalsToFast().
ericsnowcurrently Jun 4, 2021
9cdc8ba
Fix PyFrame_FastToLocals() and PyFrame_LocalsToFast() when the frame …
ericsnowcurrently Jun 7, 2021
5a4d984
Use the right offset in super_init_without_args().
ericsnowcurrently Jun 7, 2021
05accc0
Py_ssize_t -> int.
ericsnowcurrently Jun 7, 2021
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Drop _Py_MAX_OPARG (and add a note about max oparg size).
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@ericsnowcurrently
ericsnowcurrently committed Jun 7, 2021
commit 1a8400e74e845874afd1ef75e9af50bdba8f8e49
11 changes: 9 additions & 2 deletions Include/cpython/code.h
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Expand Up @@ -2,9 +2,16 @@
# error "this header file must not be included directly"
#endif

/* Each instruction in a code object is a fixed-width value,
* currently 2 bytes: 1-byte opcode + 1-byte oparg. The EXTENDED_ARG
* opcode allows for larger values but the current limit is 3 uses
* of EXTENDED_ARG (see Python/wordcode_helpers.h), for a maximum
* 32-bit value. This aligns with the note in Python/compile.c
* (compiler_addop_i_line) indicating that the max oparg value is
* 2**32 - 1, rather than INT_MAX.
*/

typedef uint16_t _Py_CODEUNIT;
// Each oparg must fit in the second half of _Py_CODEUNIT, hence 8 bits.
#define _Py_MAX_OPARG 255

#ifdef WORDS_BIGENDIAN
# define _Py_OPCODE(word) ((word) >> 8)
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