Files
ppsspp/Core/MIPS/JitCommon
Henrik RydgårdandClaude Opus 5.5 6e475258da ME: Run the Media Engine on the ARM64 and x64 JITs
The native dispatcher generated for the ME leaves when its downcount
runs out instead of calling CoreTiming::Advance, and IRNativeJit gets
RunDowncount. Pointerify is decided from the CPU's own memory base. ARM32,
RISC-V and LoongArch64 still give the ME the IR interpreter.

LoadKernel/StoreKernel are now compiled on ARM64 and x64 rather than
going through the IR interpreter one op at a time: memory directly, or a
call to fixed code (which saves the caller-saved registers guest values
live in) for 0xBC000000-0xBFFFFFFF. ARM64's block size estimate counts
them as such. The 16-bit ones stay generic while the software renderer's
depth mirrors are active, as Load16/Store16 do. That matters for the main
CPU's kernel code too, and for all code while the ME is emulated, which
runs in kernel mode everywhere. mcidclan's me-soft-interrupt went from
476 billion to 6.4 billion host instructions for 3 emulated seconds,
ending with the same ME counter as the IR interpreter.

The ME unit tests run on the native JIT too.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
2026-10-21 10:28:50 +02:00
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