anchor.diff:  PRESET,PAPI_TOT_IIS,NOT_DERIVED,PM_INST_DISP
   PRESET,PAPI_TOT_INS,NOT_DERIVED,PM_INST_CMPL
   PRESET,PAPI_INT_INS,NOT_DERIVED,PM_FXU_FIN
  -PRESET,PAPI_FP_OPS,DERIVED_ADD,PM_FPU_1FLOP,PM_FPU_FMA
  +PRESET,PAPI_FP_OPS,DERIVED_ADD,PM_FPU_1FLOP,PM_FPU_FMA,PM_FPU_FMA
   PRESET,PAPI_FP_INS,NOT_DERIVED,PM_FPU_FIN
   PRESET,PAPI_TOT_CYC,NOT_DERIVED,PM_RUN_CYC
   PRESET,PAPI_FDV_INS,NOT_DERIVED,PM_FPU_FDIV
  
positive.code: PRESET,PAPI_TOT_IIS,NOT_DERIVED,PM_INST_DISP
  PRESET,PAPI_TOT_INS,NOT_DERIVED,PM_INST_CMPL
  PRESET,PAPI_INT_INS,DERIVED_ADD,PM_FXU0_FIN,PM_FXU1_FIN
  PRESET,PAPI_FP_OPS,DERIVED_ADD,PM_FPU_FLOP,PM_FPU_FMA
  PRESET,PAPI_FP_INS,NOT_DERIVED,PM_FPU_FIN
  PRESET,PAPI_TOT_CYC,NOT_DERIVED,PM_CYC
  PRESET,PAPI_HW_INT,NOT_DERIVED,PM_EXT_INT
  PRESET,PAPI_STL_ICY,NOT_DERIVED,PM_0INST_FETCH
  PRESET,PAPI_LD_INS,NOT_DERIVED,PM_LD_REF_L1
  
negative.code: PRESET,PAPI_TOT_IIS,NOT_DERIVED,PM_INST_DISP
  PRESET,PAPI_TOT_INS,NOT_DERIVED,PM_INST_CMPL
  PRESET,PAPI_INT_INS,NOT_DERIVED,PM_FXU_FIN
  PRESET,PAPI_FP_OPS,DERIVED_POSTFIX,N0|N1|2|*|+|N2|N3|+|4|*|+|,PM_FPU_1FLOP,PM_FPU_FMA,PM_FPU_FSQRT,PM_FPU_FDIV
  PRESET,PAPI_FP_INS,NOT_DERIVED,PM_FPU_FIN
  PRESET,PAPI_TOT_CYC,NOT_DERIVED,PM_RUN_CYC
  PRESET,PAPI_FDV_INS,NOT_DERIVED,PM_FPU_FDIV
  