Fix branch-misses on Raspberry Pi 3B #95
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Should we close #93 accordingly? |
According to "Arm Cortex-A53 MPCore Processor Technical Reference Manual", the data-processing instructions using the PC as a destination register is not predicted. Replace the `MOV pc, ...` with `BLX` or `POP` instruction. Close sysprog21#93
OK. I have updated the commit message. |
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According to "Arm Cortex-A53 MPCore Processor Technical Reference Manual", the data-processing instructions using the PC as a destination register is not predicted.
After substituting the
MOV pc, ...withBLXinstruction, the statistics become:It reduces half of branch-misses and has ~4% speedup. The further improvement should be done in the optimizer.
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