Hi, starting valgrind I get: Mem version vex amd64->IR: unhandled instruction bytes: 0xC4 0xE3 0x7D 0x1D 0x6 0x0 0x48 0x83 0xC7 0x20 vex amd64->IR: REX=0 REX.W=0 REX.R=0 REX.X=0 REX.B=0 vex amd64->IR: VEX=1 VEX.L=1 VEX.nVVVV=0x0 ESC=0F3A vex amd64->IR: PFX.66=1 PFX.F2=0 PFX.F3=0 ==30456== valgrind: Unrecognised instruction at address 0x617cde. This corresponds to: vcvtps2ph $0x0,%ymm0,(%rsi) Thanks, Jens
*** Bug 415382 has been marked as a duplicate of this bug. ***
This was fixed in the 3.15.0 release.