https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113087
--- Comment #32 from Patrick O'Neill <patrick at rivosinc dot com> --- (In reply to JuzheZhong from comment #31) > You are using -Ofast which will have precision issue on floating-point. > > You can reference it: > > https://godbolt.org/z/zzG8xbx95 > > O3 result: 50002896.000000 > Ofast result: 50005000.000000 > > They are different and not correctness issue. > > GCC is same behavior as LLVM. > > More details: > https://github.com/llvm/llvm-project/issues/77044 > > So, to elide the potential floating-point precision confusion, > I suggest you first use -O3 -ftrapping-math to test SPEC. > > Otherwise, it's really hard to locate the real issue. The cam4 failure still appears with: "-O3" "-ftrapping-math" "-mtune=generic-ooo" "-march=rv64imafdcv_zba_zbb_zbs_zicond_zfa" "-fno-lto" "-ftree-vectorize" "--param=riscv-autovec-preference=scalable" I'll keep digging through the harness and finding the remaining flags.
