https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113570
Bug ID: 113570
Summary: RISC-V: SPEC2017 549 fotonik3d miscompilation in
autovec VLS 256 build
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: vineetg at gcc dot gnu.org
CC: juzhe.zhong at rivai dot ai, kito.cheng at gmail dot com,
law at gcc dot gnu.org, palmer at dabbelt dot com,
patrick at rivosinc dot com, rdapp at gcc dot gnu.org
Target Milestone: ---
fotonik3d runs to completion BUT output results fail vs. reference output.
specperl specdiff -m -l 10 --abstol 1e-27 --reltol 1e-10 --obiwan
--floatcompare benchspec/CPU/549.fotonik3d_r/data/refrate/output/pscyee.out
pscyee.out
0646: -1.91273086037953E-17, -1.46491401919706E-15,
-1.91273086057460E-17, -1.46491401919687E-15,
^
0668: -1.91251317582607E-17, -1.42348205527085E-15,
-1.91251317602571E-17, -1.42348205527068E-15,
^
0690: -1.91228927083786E-17, -1.38431570180230E-15,
-1.91228927104223E-17, -1.38431570180212E-15,
^
0712: -1.91205914533895E-17, -1.34723370999236E-15,
-1.91205914554988E-17, -1.34723370999214E-15,
^
0734: -1.91182279925531E-17, -1.31207366208699E-15,
-1.91182279947287E-17, -1.31207366208678E-15,
^
0756: -1.91158023250692E-17, -1.27868958770083E-15,
-1.91158023272966E-17, -1.27868958770060E-15,
^
0778: -1.91133144501623E-17, -1.24694993327743E-15,
-1.91133144524329E-17, -1.24694993327713E-15,
^
0800: -1.91107643669701E-17, -1.21673582512221E-15,
-1.91107643693121E-17, -1.21673582512195E-15,
^
0822: -1.91081520746626E-17, -1.18793957765398E-15,
-1.91081520769832E-17, -1.18793957765367E-15,
^
0844: -1.91054775723835E-17, -1.16046340741478E-15,
-1.91054775748087E-17, -1.16046340741452E-15,
^
Build flags: -Ofast -fno-lto -static -march=rv64gcv_zvl256b_zba_zbb_zbs_zicond
-ftree-vectorize --param=riscv-autovec-preference=scalable
-fallow-argument-mismatch -fmax-stack-var-size=65536
QEMU_CPU=rv64,v=true,vlen=256,vext_spec=v1.0,Zve32f=true,Zve64f=true,zba=true,zbb=true,zbs=true,zicond=true
