JIT (armv6m): use literal pool to reduce binary size #1903
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- Also optimize some move immediate combinations to use 2 instructions instead of 1 instruction and a 32 bits literal - Also add flushing of stream and backends - Also add two new conditions that will be used by an incoming optimization Signed-off-by: Paul Guyot <pguyot@kallisys.net>
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bettio
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Embedded JIT mode for Pico Continuation of: - #1829 - #1838 - #1881 - #1891 - #1893 - #1900 - #1901 - #1903 - #1907 Add the ability to perform just in time compilation directly on Raspberry Pi Pico. Erlang bytecode is compiled to armv6m on the first run and directly executed on subsequent runs. In this PR, the native code compilation does not take advantage of being done on the device, it still generates position independent code. If Erlang modules include `Type` chunk, the same optimizations that happen on the desktop with precompilation could be done on the Pico, however current release (0.7.5) of [`packbeam`](https://github.com/atomvm/atomvm_packbeam) prunes the `Type` chunk. Just in time compilation on the Pico is achieved by: - Adding a flush call after JIT is performed, which is noop on all platforms except on armv6m where we flush the literal pool (normally a noop, though, as the pool should have been flushed earlier). - Updating avm API to fetch the last section named end. - Adding a `jit_stream_flash` for RP2 platform and adding a cache native code mechanism that rely on the avm end section on RP2 to find out where to flash jit code (after the last end) and detect if avm were updated. These changes are made under both the "Apache 2.0" and the "GNU Lesser General Public License 2.1 or later" license terms (dual license). SPDX-License-Identifier: Apache-2.0 OR LGPL-2.1-or-later
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JIT: Optimize memory usage by rewriting jump table immediately Continuation of: - #1900 - #1901 - #1903 - #1909 These changes are made under both the "Apache 2.0" and the "GNU Lesser General Public License 2.1 or later" license terms (dual license). SPDX-License-Identifier: Apache-2.0 OR LGPL-2.1-or-later
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Continuation of:
JIT: factorize tail calls to reduce binary size #1901
Also optimize some move immediate combinations to use 2 instructions instead
of 1 instruction and a 32 bits literal
Also add flushing of stream and backends
Also add two new conditions that will be used by an incoming optimization
These changes are made under both the "Apache 2.0" and the "GNU Lesser General
Public License 2.1 or later" license terms (dual license).
SPDX-License-Identifier: Apache-2.0 OR LGPL-2.1-or-later