StTriggerUtilities/StDSMUtilities/DSMAlgo_EM201_2009.cc

//
// Pibero Djawotho <pibero@comp.tamu.edu>
// Texas A&M University Cyclotron Institute
// 7 Jan 2009
//

#include "DSM.hh"
#include "DSMAlgo_EM201_2009.hh"

int DSMAlgo_EM201_2009::ajpBarrel(const DSM& dsm, int offset) const
{
  int jpBits[6];

  // BC101-106

  for (int ch = 0; ch < 6; ++ch)
    jpBits[ch] = dsm.channels[ch] >> offset & 0x3;

  return (jpBits[0] && jpBits[1] ||
          jpBits[1] && jpBits[2] ||
          jpBits[2] && jpBits[3] ||
          jpBits[3] && jpBits[4] ||
          jpBits[4] && jpBits[5] ||
          jpBits[5] && jpBits[0]);
}

int DSMAlgo_EM201_2009::ajpEndcap(const DSM& dsm) const
{
  int jpBits[6];

  // EE101

  jpBits[0] = dsm.channels[6]      & 0x3; // JPA (4 o'clock)
  jpBits[1] = dsm.channels[6] >> 2 & 0x3; // JPB (6 o'clock)
  jpBits[2] = dsm.channels[6] >> 4 & 0x3; // JPC (8 o'clock)

  // EE102

  jpBits[3] = dsm.channels[7]      & 0x3; // JPA (10 o'clock)
  jpBits[4] = dsm.channels[7] >> 2 & 0x3; // JPB (12 o'clock)
  jpBits[5] = dsm.channels[7] >> 4 & 0x3; // JPC (2  o'clock)

  return (jpBits[0] && jpBits[1] ||
          jpBits[1] && jpBits[2] ||
          jpBits[2] && jpBits[3] ||
          jpBits[3] && jpBits[4] ||
          jpBits[4] && jpBits[5] ||
          jpBits[5] && jpBits[0]);
}

void DSMAlgo_EM201_2009::operator()(DSM& dsm)
{
  // INPUT:

  // EM201 - ch0 - BEMC BC101 - 10' - JP0 & JP6 (West & East)
  //         ch1 - BEMC BC102 - 12' - JP1 & JP7
  //         ch2 - BEMC BC103 -  2' - JP2 & JP8
  //         ch3 - BEMC BC104 -  4' - JP3 & JP9
  //         ch4 - BEMC BC105 -  6' - JP4 & JP10
  //         ch5 - BEMC BC106 -  8' - JP5 & JP11
  //         ch6 - EEMC EE101 -  4',  6' and 8' - JP3, JP4 & JP5
  //         ch7 - EEMC EE102 - 10', 12' and 2' - JP0, JP1 & JP2

  // From BC101-106 (16):

  // (0-1) JPX (east, -1 < eta < 0) threshold bits (2)
  // (2-3) JPY (middle, -0.6 < eta < 0.4) threshold bits (2)
  // (4-5) JPZ (west, 0 < eta < 1) threshold bits (2)
  // (6-11) JPpartial (0.4 < eta < 1) sum (6)
  // (12-15) HT bits (4)

  // From EE101 (16):

  // (0-1) JPA (4 o'clock) threshold bits (2)
  // (2-3) JPB (6 o'clock) threshold bits (2)
  // (4-5) JPC (8 o'clock) threshold bits (2)
  // (6-11) Selected partial jet patch sum (6)
  // (12-13) Partial jet patch ID (1=A, 2=B, 3=C) (2)
  // (14-15) HT bits (2)

  // From EE102 (16):

  // (0-1) JPA (10 o'clock) threshold bits (2)
  // (2-3) JPB (12 o'clock) threshold bits (2)
  // (4-5) JPC (2  o'clock) threshold bits (2)
  // (6-11) Selected partial jet patch sum (6)
  // (12-13) Partial jet patch ID (1=A, 2=B, 3=C) (2)
  // (14-15) HT bits (2)

  // REGISTERS:

  // R0: Hybrid jet patch threshold-0
  // R1: Hybrid jet patch threshold-1
  // R2: Hybrid jet patch threshold-2

  // ACTION:

  // Complete hybrid jet patches using partial jet patch ID from EEMC

  int jpSum1 = dsm.channels[6] >> 6 & 0x3f; // Partial sum from EE101
  int jpSum2 = dsm.channels[7] >> 6 & 0x3f; // Partial sum from EE102

  int jpId1 = dsm.channels[6] >> 12 & 0x3; // Partial jet patch ID from EE101
  int jpId2 = dsm.channels[7] >> 12 & 0x3; // Partial jet patch ID from EE102

  switch (jpId1) {
  case 1: jpSum1 += dsm.channels[3] >> 6 & 0x3f; break; // Add partial sum from BC104 (4')
  case 2: jpSum1 += dsm.channels[4] >> 6 & 0x3f; break; // Add partial sum from BC105 (6')
  case 3: jpSum1 += dsm.channels[5] >> 6 & 0x3f; break; // Add partial sum from BC106 (8')
  }

  switch (jpId2) {
  case 1: jpSum2 += dsm.channels[0] >> 6 & 0x3f; break; // Add partial sum from BC101 (10')
  case 2: jpSum2 += dsm.channels[1] >> 6 & 0x3f; break; // Add partial sum from BC102 (12')
  case 3: jpSum2 += dsm.channels[2] >> 6 & 0x3f; break; // Add partial sum from BC103 (2')
  }

  // Combine (OR) the HT bits from the six BEMC layer 1 DSM's

  int htBitsBarrel = 0;

  for (int ch = 0; ch < 6; ++ch)
    htBitsBarrel |= dsm.channels[ch] >> 12 & 0xf;

  // Combine (OR) the HT bits from the two EEMC layer 1 DSM's

  int htBitsEndcap = 0;

  for (int ch = 6; ch < 8; ++ch)
    htBitsEndcap |= dsm.channels[ch] >> 14 & 0x3;

  // Combine (OR) the JP bits for the BEMC and EEMC separately

  int jpBitsBarrel = 0;

  for (int ch = 0; ch < 6; ++ch) {
    int jpx = dsm.channels[ch]      & 0x3;
    int jpy = dsm.channels[ch] >> 2 & 0x3;
    int jpz = dsm.channels[ch] >> 4 & 0x3;

    if (jpx > jpBitsBarrel) jpBitsBarrel = jpx;
    if (jpy > jpBitsBarrel) jpBitsBarrel = jpy;
    if (jpz > jpBitsBarrel) jpBitsBarrel = jpz;
  }

  int bjp1 = jpBitsBarrel > 1;
  int bjp2 = jpBitsBarrel > 2;

  int jpBitsEndcap = 0;

  for (int ch = 6; ch < 8; ++ch) {
    int jpa = dsm.channels[ch]      & 0x3;
    int jpb = dsm.channels[ch] >> 2 & 0x3;
    int jpc = dsm.channels[ch] >> 4 & 0x3;

    if (jpa > jpBitsEndcap) jpBitsEndcap = jpa;
    if (jpb > jpBitsEndcap) jpBitsEndcap = jpb;
    if (jpc > jpBitsEndcap) jpBitsEndcap = jpc;
  }

  int ejp1 = jpBitsEndcap > 1;
  int ejp2 = jpBitsEndcap > 2;

  // Compare the two completed hybrid jet patches to three thresholds
  // and combine (OR) the results with the BEMC-only and EEMC-only bits

  int jpBits = 0;

  for (int reg = 0; reg < 3; ++reg)
    if (jpSum1 > dsm.registers[reg] || jpSum2 > dsm.registers[reg]) ++jpBits;

  if (jpBitsBarrel > jpBits) jpBits = jpBitsBarrel;
  if (jpBitsEndcap > jpBits) jpBits = jpBitsEndcap;

  int jp1 = jpBits > 1;
  int jp2 = jpBits > 2;

  // Adjacent jet patch logic

  int ajpx = ajpBarrel(dsm, 0);
  int ajpy = ajpBarrel(dsm, 2);
  int ajpz = ajpBarrel(dsm, 4);
  int bajp = ajpx || ajpy || ajpz;
  int eajp = ajpEndcap(dsm);
  int  ajp = bajp || eajp;

  // OUTPUT (15):

  // (0:3) Barrel HT bits (4)
  // (4:5) Endcap HT bits (2)
  // (6) JP1, unified over the BEMC+EEMC (1)
  // (7) JP2, unified over the BEMC+EEMC (1)
  // (8) BJP1 for the 18 BEMC-only patches (1)
  // (9) BJP2 for the 18 BEMC-only patches (1)
  // (10) EJP1 for the 6 EEMC-only patches (1)
  // (11) EJP2 for the 6 EEMC-only patches (1)
  // (12) AJP for BEMC and EEMC but NOT the boundary (1)
  // (13) BAJP for the BEMC-only patches (1)
  // (14) EAJP for the EEMC-only patches (1)

  int out = 0;

  out |= htBitsBarrel;
  out |= htBitsEndcap << 4;
  out |= jp1  << 6;
  out |= jp2  << 7;
  out |= bjp1 << 8;
  out |= bjp2 << 9;
  out |= ejp1 << 10;
  out |= ejp2 << 11;
  out |= ajp  << 12;
  out |= bajp << 13;
  out |= eajp << 14;

  dsm.output = out;

  // INFO

  dsm.info[0] = jpSum1;
  dsm.info[1] = jpSum2;
}

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