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The header sparcisr.h is part of the ABI and may be included by code which
does not define RTEMS_4_8_EDISOFT yet uses 4.8 Edisoft.  In such cases the
definition of sparc_install_ta_3_window_flush_isr will be inconsistent.  So
just make this function always available, and provide the correct
definition in the .c file (which must have RTEMS_4_8_EDISOFT defined if
that toolchain is used).

The base location of TBR may be different from 0x40000000.

With peak stack usage enabled the sorting method takes more CPU cycles and
with a list of 2000 entries it needs more than is provided by the test
suite.

This reverts commit 3fa626a1.

The static analysers gave other warnings with this commit in place.

Copied from tests/float/builtin_float_abs.py.

Nan and inf (signed and unsigned) are also handled correctly by using
signbit (they were also handled correctly with "val<0", but that didn't
handle -0.0 correctly).  A test case is added for this behaviour.

Taken as-is from upstream b3eadf3f3d0cfd4c56a519ae289288ee829229a5

This is to appease static analysers.  If MICROPY_PY_COLLECTIONS_ORDEREDDICT
is disabled then map->is_ordered implies map->is_fixed, and fixed maps are
only even called with MP_MAP_LOOKUP (see assert at start of the function),
so this new if statement should never be executed, it's only added to keep
static analysers happy.

The error message for out-of-pystack recently changed.

If let through, these constructs will crash the VM because the VM does not
correctly handle unwinding jumps out of finally blocks.

It really is unsigned.  This prevents a compiler warning and the generated
code is exactly the same.

Cherry picked from upstream commit 91041945c91bae96d918876547cae48484cd8953

Per the Python language specs, containers enforce reflexivity of elements
in the container: x == x is assumed True and so the test "x is y" forces
this.

From upstream, only those relevant to the LEON port have been taken.

Tests not taken because the compiler isn't included:

    syntax_unicode_nameesc.py

Tests not taken because there is no eval/exec:

    core_locals_eval.py
    syntax_spaces.py

Tests not taken because there is no file import:

    core_import_path.py
    core_import_prereg.py
    core_import_split_ns_pkgs.py
    modules_deque.py
    modules_json_nonserializable.py

Due to a typo, math.e was too small by around 6e-11.