Henrik RydgårdandClaude Opus 5.5 88d6befc02 CPU: jr and jalr ignore the target's low two bits on the main CPU too ...

On a PSP, jr and jalr to an address with its low two bits set raise no
address error: they run from the aligned address, the PC keeps no low
bits, and jalr's link is unaffected (cpu/jump/unaligned, recorded on
firmware 6.61). This was done only for the Media Engine.

The firmware's PS1 emulator returns through such an address. The
interpreters stopped there with an invalid jump, and the JITs found the
block at the aligned address only if it was already compiled, and
otherwise compiled one at the unaligned address.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

2026-10-23 14:23:39 +02:00

..

IRAnalysis.cpp

IR: Compute runs of VFPU dot products four at a time

2026-10-15 11:02:17 +02:00

IRAnalysis.h

IR: Compute runs of VFPU dot products four at a time

2026-10-15 11:02:17 +02:00

IRCompALU.cpp

Decode the unused bits of shifts and Allegrex bit ops as the PSP does

2026-10-14 10:56:48 +02:00

IRCompBranch.cpp

CPU: jr and jalr ignore the target's low two bits on the main CPU too

2026-10-23 14:23:39 +02:00

IRCompFPU.cpp

MMIO: Register hardware register blocks as devices

2026-10-20 12:36:52 +02:00

IRCompLoadStore.cpp

IR: Compile data cache ops to nothing

2026-10-20 21:18:21 +02:00

IRCompVFPU.cpp

VFPU: Drop the inaccurate dot product paths

2026-10-18 12:11:46 +02:00

IRFrontend.cpp

ME: Run the Media Engine on the IR interpreter

2026-10-21 10:28:50 +02:00

IRFrontend.h

ME: Run the Media Engine on the IR interpreter

2026-10-21 10:28:50 +02:00

IRInst.cpp

IR: Compile kernel loads and stores instead of interpreting them

2026-10-20 13:40:47 +02:00

IRInst.h

IR: Compile kernel loads and stores instead of interpreting them

2026-10-20 13:40:47 +02:00

IRInterpreter.cpp

IR interpreter: Halt with a memory exception on a bad guest access

2026-10-21 14:35:00 +02:00

IRInterpreter.h

ME: Run the Media Engine on the ARM64 and x64 JITs

2026-10-21 10:28:50 +02:00

IRJit.cpp

ME: Run the Media Engine on the IR interpreter

2026-10-21 10:28:50 +02:00

IRJit.h

ME: Run the Media Engine on the IR interpreter

2026-10-21 10:28:50 +02:00

IRNativeCommon.cpp

ME: Run the Media Engine on the ARM64 and x64 JITs

2026-10-21 10:28:50 +02:00

IRNativeCommon.h

ME: Run the Media Engine on the ARM64 and x64 JITs

2026-10-21 10:28:50 +02:00

IRPassSimplify.cpp

IR: Compile kernel loads and stores instead of interpreting them

2026-10-20 13:40:47 +02:00

IRPassSimplify.h

IR: Compile kernel loads and stores instead of interpreting them

2026-10-20 13:40:47 +02:00

IRRegCache.cpp

IR JITs: Split the IR interpreter out, and keep IR to it

2026-10-20 12:09:16 +02:00

IRRegCache.h

CPU: Give each MIPSState an address space for its memory accesses

2026-10-20 18:41:28 +02:00