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.
}
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;
}
unsigned SIRegisterInfo::getNumSGPRsAllowed(const SISubtarget &ST,
unsigned WaveCount) const {
if (ST.getGeneration() >= SISubtarget::VOLCANIC_ISLANDS) {
switch (WaveCount) {
case 10: return 80;
case 9: return 80;
case 8: return 96;
default: return 102;
}
} else {
switch(WaveCount) {
case 10: return 48;
case 9: return 56;
case 8: return 64;
case 7: return 72;
case 6: return 80;
case 5: return 96;
default: return 103;
}
}
}
unsigned SIRegisterInfo::getMinNumSGPRs(const SISubtarget &ST,
unsigned WavesPerEU) const {
if (ST.getGeneration() >= AMDGPUSubtarget::VOLCANIC_ISLANDS) {
switch (WavesPerEU) {
case 0: return 0;
case 10: return 0;
case 9: return 0;
case 8: return 81;
default: return 97;
}
} else {
switch (WavesPerEU) {
case 0: return 0;
case 10: return 0;
case 9: return 49;
case 8: return 57;
case 7: return 65;
case 6: return 73;
case 5: return 81;
default: return 97;
}
}
}
unsigned SIRegisterInfo::getMaxNumSGPRs(const SISubtarget &ST,
unsigned WavesPerEU) const {
if (ST.getGeneration() >= AMDGPUSubtarget::VOLCANIC_ISLANDS) {
switch (WavesPerEU) {
case 0: return 80;
case 10: return 80;
case 9: return 80;
case 8: return 96;
default: return getNumAddressableSGPRs(ST);
}
} else {
switch (WavesPerEU) {
case 0: return 48;
case 10: return 48;
case 9: return 56;
case 8: return 64;
case 7: return 72;
case 6: return 80;
case 5: return 96;
default: return getNumAddressableSGPRs(ST);
}
}
}
unsigned SIRegisterInfo::getNumReservedSGPRs(const SISubtarget &ST) const {
if (ST.getGeneration() >= AMDGPUSubtarget::VOLCANIC_ISLANDS)
return 6; // VCC, FLAT_SCRATCH, XNACK.
return 2; // VCC.
}
unsigned SIRegisterInfo::getNumAddressableSGPRs(const SISubtarget &ST) const {
if (ST.getGeneration() >= AMDGPUSubtarget::VOLCANIC_ISLANDS)
return 102;
return 104;
}
unsigned SIRegisterInfo::getTotalNumSGPRs(const SISubtarget &ST) const {
if (ST.getGeneration() >= AMDGPUSubtarget::VOLCANIC_ISLANDS)
return 800;
return 512;
}