refactor: ⚡ Switch to thumb-mode to reduce code size #2
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This isn't necessarily fixing anything on the V5 in particular (exit requests are handled by CPU0, which then interrupt CPU1 after), but it's certainly more correct and may be required for other single-core VEXos targets if support is added in the future.
0.23.0 most notably removes uses of `#[no_mangle]` from symbols in `vex-sdk` to avoid conflicts with other versions of the crate. Symbols were originally `#[no_mangle]` for the purposes of compiling to a C static library, but this never ended up being useful and would be actively harmful to include in `libstd`.
…now` on armv7a-vex-v5
The Cortex-A9 only has 16 double-precision registers (`d0`-`d15`), so this is the correct VFP instructionset to use.
This release of `vex-sdk` notably removes any (previously misguided) usage of `#[no_mangle]` which would be unsuitable to have in `libstd`.
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