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A comment on RISC-V Is Sloooow. Parent comment

Re:RISC-V Is Sloooow by mjmas on Tuesday March 10, 2026 @06:00PM (#47329317)
An extension he calls Xh3bextm. For extracting multiple bits from bitfields.

https://wren.wtf/hazard3/doc/#extension-xh3bextm-section

There are also four other custom extensions implemented.

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Re:RISC-V Is Sloooow by wren6991 on Saturday March 14, 2026 @02:51PM (#47379843)
This extension wasn't strictly necessary but it makes decode of Arm instructions faster in the bootrom's Arm emulator.
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