Compiler-related Information

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

General Extensions

Supported Optimizations	gcc-14	clang-19	clang-20
Zfh	✅	✅	✅
V	✅	✅	✅

THead Vendor Extensions

xthead Current Version v2.2

Supported Optimizations	gcc-14	clang-19	clang-20
XTheadCmo	✅	✅	✅
XTheadSync	✅	✅	✅
XTheadBa	✅	✅	✅
XTheadBb	✅	✅	✅
XTheadBs	✅	✅	✅
XTheadCondMov	✅	✅	✅
XTheadMemIdx	✅	✅	✅
XTheadMemPair	✅	✅	✅
XTheadFMemIdx	✅	✅	✅
XTheadMac	✅	✅	✅
XTheadFmv	✅	❌	❌
XTheadInt	✅	❌	❌
XtheadVector	✅	❌	❌
XTHeadVdot1	✅	✅	✅

Notes:

1. XTHeadVdot is not supported on c910v1/c920v1.

Reference Documentation

• xuantie Extension Reference Document
• gcc Merged xuantie Extension Submission
• clang-19 xuantie Extension Documentation