Beispiel #1
0
unsigned SIRegisterInfo::getNumReservedSGPRs(const SISubtarget &ST,
                                             const SIMachineFunctionInfo &MFI) const {
  if (MFI.hasFlatScratchInit()) {
    if (ST.getGeneration() >= AMDGPUSubtarget::VOLCANIC_ISLANDS)
      return 6; // FLAT_SCRATCH, XNACK, VCC (in that order)

    if (ST.getGeneration() == AMDGPUSubtarget::SEA_ISLANDS)
      return 4; // FLAT_SCRATCH, VCC (in that order)
  }

  if (ST.isXNACKEnabled())
    return 4; // XNACK, VCC (in that order)

  return 2; // VCC.
}
Beispiel #2
0
static unsigned getNumExtraSGPRs(const SISubtarget &ST,
                                 bool VCCUsed,
                                 bool FlatScrUsed) {
  unsigned ExtraSGPRs = 0;
  if (VCCUsed)
    ExtraSGPRs = 2;

  if (ST.getGeneration() < SISubtarget::VOLCANIC_ISLANDS) {
    if (FlatScrUsed)
      ExtraSGPRs = 4;
  } else {
    if (ST.isXNACKEnabled())
      ExtraSGPRs = 4;

    if (FlatScrUsed)
      ExtraSGPRs = 6;
  }

  return ExtraSGPRs;
}