Embedded JIT mode for Pico #1909
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Use a cache to remember tail calls that were already implemented and replace further implementations of the same tail call with a jump to the previous implementation. Coverage shows that all cases are covered in libs/estdlib/src and libs/jit/src: OP_RETURN: 50 misses, 1735 hits (97%) OP_JUMP/OP_CALL_LAST/OP_CALL_ONLY: 656 misses, 389 hits (37%) OP_CALL_LAST: 220 misses, 206 hits (48%) OP_FUNC_INFO: 58 misses, 1619 hits (97%) Signed-off-by: Paul Guyot <[email protected]>
Signed-off-by: Paul Guyot <[email protected]>
Signed-off-by: Paul Guyot <[email protected]>
This is required as flash chips are programmed by setting bits from 1 to 0, and erased by setting all bits to 0, so placeholders set to FF can be replaced without erasing a whole block. Signed-off-by: Paul Guyot <[email protected]>
Signed-off-by: Paul Guyot <[email protected]>
Introduce jit_stream_flash.c common implementation that leverages (common) flash behavior that can be written from 1 to 0. Signed-off-by: Paul Guyot <[email protected]>
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Continuation of:
binary:copy/1,2stubs to binary module #1907Add 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
Typechunk, the same optimizations that happen on the desktop with precompilation could be done on the Pico, however current release (0.7.5) ofpackbeamprunes theTypechunk.Just in time compilation on the Pico is achieved by:
jit_stream_flashfor 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