https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116150
Bug ID: 116150
Summary: RISC-V: Differences between GCC/LLVM
Product: gcc
Version: 15.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: patrick at rivosinc dot com
Target Milestone: ---
A byproduct of my first sweep through the ISA strings with a random generator.
Extensions were seeded with -print-supported-exts from a few days ago. Ignored
profiles, experimental extensions, and extension versions. This isn't
guaranteed to be a complete list.
ilp32e 'd' extension handling:
https://inbox.sourceware.org/gcc-patches/20240730213254.199844-1-patr...@rivosinc.com/T/#u
Implied extensions:
LLVM zabha does not imply zaamo, gcc does: https://godbolt.org/z/nd6jz1vbc
LLVM all zvk* throw this error: "'zvk*' requires 'v' or 'zve*' extension to
also be specified" on GCC v is implied: https://godbolt.org/z/Pb9KWr9Y8
Unsupported (LLVM-only exts):
shcounterenw
shgatpa
shtvala
shvsatpa
shvstvala
shvstvecd
smcdeleg
smcsrind
ssccfg
ssccptr
sscounterenw
sscsrind
ssstrict
sstvala
sstvecd
ssu64xl
svade
svadu
svbare
xcvbitmanip
xcvmem
xsfvfnrclipxfqf
xsfvfwmaccqqq
xsfvqmaccdod
xsfvqmaccqoq
xsifivecdiscarddlone
xsifivecflushdlone
xtheadvdot
xwchc
zama16b
zcmop
zimop
Supported by GCC, unsupported by LLVM:
xtheadfmv
xtheadint
xtheadvector
