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README.md 2025-08-17 1.2 kB
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v1.15_ Minor fixes and improvements source code.tar.gz 2025-08-17 2.5 MB
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This release fixes some emulation issues and adds small improvements.

  • Add new experimental feature translate_use_syscall_clobbering_optimization which reduces latency of system calls with JIT and register caching (disabled by default)
  • Improved performance of accessing virtual pages in binary translation
  • Add missing FCVT.X.D emulation for 64-bit integers in binary translation
  • Match N-bit arena size for other platforms without mmap()
  • mremap() no longer has the wrong system call number (oops!)
  • free_pages() now rounds up to the nearest page when freeing
  • Add support for JIT on 64-bit RISC-V (that is, running libriscv on a real RISC-V machine)
  • Fix missing zero-termination in guest C++ strings longer than SSO
  • Minor improvements to binary translator codegen

As always, disabling register caching with JIT is still the lowest latency, however the new experimental feature reduces the gap a little bit. Having register caching enabled will improve JIT performance on heavy calculations.

WARNING: The ABI for binary translations has changed, and they need to be rebuilt to be compatible with the new version.

Full Changelog: https://github.com/libriscv/libriscv/compare/v1.14...v1.15

Source: README.md, updated 2025-08-17