mutation test gemv (Icarus, seed 1)
 0  unmodified (control)                       PASS (expected)
 1  load accepted while START pending          detected (testbench FAIL)
 2  beat order reversed within a word          detected (testbench FAIL)
 3  overrun not detected                       detected (testbench FAIL)
 4  TDEST not latched per packet               detected (testbench FAIL)
 5  START accepted while busy                  detected (testbench FAIL)
 6  result window readable when invalid        detected (testbench FAIL)
 7  result TLAST on every block                detected (testbench FAIL)
 8  BVALID dropped without BREADY              detected (testbench FAIL)
 9  ERR never cleared                          detected (testbench FAIL)
10  LOAD_WORDS counts beats                    detected (testbench FAIL)
11  W_BASE ignored                             detected (testbench FAIL)
12  irq ignores INT_ENABLE                     detected (testbench FAIL)
mutants detected: 12 of 12