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If rs == r15, the pc should still be (addr of instruction + 8), not +12.
In the .zip below, I've included a test ROM + source code for this edge case.
If the shift is by (addr of instruction + 8), the ROM displays green.
If it's +12, the ROM displays blue.
Else, it displays red.
The version of mgba I've installed displays blue, while the 3DS displays green
The text was updated successfully, but these errors were encountered:
Good catch. Looks like I misread GBATEK a long time ago and never caught that it was a bug.
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ARM: Fix Addressing mode 1 shifter on rs == pc (fixes #1926)
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