RISC-V for Gaming: Emulating X86 on RISC-V
summary
A user‑space x86/x86-64 emulator for 64‑bit RISC‑V Linux called Philix86 implements a JIT recompiler, supports most ISA features up to SSE4.2, maps SIMD to RVV 1.0 and uses RISC‑V bit‑manip extensions to avoid masks; it runs Steam launcher, Wine/Proton and several games on a Mily Jupiter board with low runtime translation overhead, handles self‑modifying code via mprotect+block invalidation, and falls back to LR/SC or locked CAS emulation for tricky atomic and memory‑model cases.
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chapters (6)
- 0:00Introduction to felix86
- 1:00Scalar instruction emulation
- 4:08SIMD instruction mapping
- 7:00Emulator demonstration
- 8:03Memory model and atomics
- 10:40Q&A and concluding remarks
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