Compiler-related Information

RevyOS comes pre-packaged with an optimized compiler that primarily supports rv64gc.

General Extensions

Supported Optimizations	gcc-10	gcc-13	clang-17
Zfh	✅	✅	✅
v0p7	✅	❌	❌

THead Vendor Extensions

xthead Current Version v2.2

Supported Optimizations1	gcc-102	gcc-13.2	clang-17
XTheadCmo	✅	✅	✅
XTheadSync	✅	✅	✅
XTheadBa	✅	✅	✅
XTheadBb	✅	✅	✅
XTheadBs	✅	✅	✅
XTheadCondMov	✅	✅	✅
XTheadMemIdx	✅	✅	✅
XTheadMemPair	✅	✅	✅
XTheadFMemIdx	✅	✅	✅
XTheadMac	✅	✅	✅
XTheadFmv	✅	✅	❌
XTheadInt	✅	✅	❌
XTHeadVdot3	✅	✅	✅

Notes:

1. gcc-11/gcc-12/clang-14/clang-15/clang-16 have insufficient or no xthead extensions, hence they are not listed.
2. gcc-10 uses xtheadc to cover all extensions, and gcc-10 is built using the source code from the thead-gcc project.
3. XTHeadVdot is not supported on c910v/c920.

Reference Documentation

• xthead Extension Reference Document
• gcc Merged xthead Extension Submission
• clang-17 xthead Extension Documentation