diff options
Diffstat (limited to 'llvm/lib/Target/X86/X86InstrInfo.cpp')
| -rw-r--r-- | llvm/lib/Target/X86/X86InstrInfo.cpp | 82 |
1 files changed, 43 insertions, 39 deletions
diff --git a/llvm/lib/Target/X86/X86InstrInfo.cpp b/llvm/lib/Target/X86/X86InstrInfo.cpp index eeb020ba3b7..5def78737f8 100644 --- a/llvm/lib/Target/X86/X86InstrInfo.cpp +++ b/llvm/lib/Target/X86/X86InstrInfo.cpp @@ -3659,45 +3659,49 @@ unsigned X86InstrInfo::getGlobalBaseReg(MachineFunction *MF) const { return GlobalBaseReg; } -X86InstrInfo::SSEDomain X86InstrInfo::GetSSEDomain(const MachineInstr *MI, - const unsigned *&equiv) const { - // These are the replaceable SSE instructions. Some of these have Int variants - // that we don't include here. We don't want to replace instructions selected - // by intrinsics. - static const unsigned ReplaceableInstrs[][3] = { - //PackedInt PackedSingle PackedDouble - { X86::MOVDQAmr, X86::MOVAPSmr, X86::MOVAPDmr }, - { X86::MOVDQArm, X86::MOVAPSrm, X86::MOVAPDrm }, - { X86::MOVDQArr, X86::MOVAPSrr, X86::MOVAPDrr }, - { X86::MOVDQUmr, X86::MOVUPSmr, X86::MOVUPDmr }, - { X86::MOVDQUrm, X86::MOVUPSrm, X86::MOVUPDrm }, - { X86::MOVNTDQmr, X86::MOVNTPSmr, X86::MOVNTPDmr }, - { X86::PANDNrm, X86::ANDNPSrm, X86::ANDNPDrm }, - { X86::PANDNrr, X86::ANDNPSrr, X86::ANDNPDrr }, - { X86::PANDrm, X86::ANDPSrm, X86::ANDPDrm }, - { X86::PANDrr, X86::ANDPSrr, X86::ANDPDrr }, - { X86::PORrm, X86::ORPSrm, X86::ORPDrm }, - { X86::PORrr, X86::ORPSrr, X86::ORPDrr }, - { X86::PUNPCKHQDQrm, X86::UNPCKHPSrm, X86::UNPCKHPDrm }, - { X86::PUNPCKHQDQrr, X86::UNPCKHPSrr, X86::UNPCKHPDrr }, - { X86::PUNPCKLQDQrm, X86::UNPCKLPSrm, X86::UNPCKLPDrm }, - { X86::PUNPCKLQDQrr, X86::UNPCKLPSrr, X86::UNPCKLPDrr }, - { X86::PXORrm, X86::XORPSrm, X86::XORPDrm }, - { X86::PXORrr, X86::XORPSrr, X86::XORPDrr }, - }; +// These are the replaceable SSE instructions. Some of these have Int variants +// that we don't include here. We don't want to replace instructions selected +// by intrinsics. +static const unsigned ReplaceableInstrs[][3] = { + //PackedInt PackedSingle PackedDouble + { X86::MOVDQAmr, X86::MOVAPSmr, X86::MOVAPDmr }, + { X86::MOVDQArm, X86::MOVAPSrm, X86::MOVAPDrm }, + { X86::MOVDQArr, X86::MOVAPSrr, X86::MOVAPDrr }, + { X86::MOVDQUmr, X86::MOVUPSmr, X86::MOVUPDmr }, + { X86::MOVDQUrm, X86::MOVUPSrm, X86::MOVUPDrm }, + { X86::MOVNTDQmr, X86::MOVNTPSmr, X86::MOVNTPDmr }, + { X86::PANDNrm, X86::ANDNPSrm, X86::ANDNPDrm }, + { X86::PANDNrr, X86::ANDNPSrr, X86::ANDNPDrr }, + { X86::PANDrm, X86::ANDPSrm, X86::ANDPDrm }, + { X86::PANDrr, X86::ANDPSrr, X86::ANDPDrr }, + { X86::PORrm, X86::ORPSrm, X86::ORPDrm }, + { X86::PORrr, X86::ORPSrr, X86::ORPDrr }, + { X86::PXORrm, X86::XORPSrm, X86::XORPDrm }, + { X86::PXORrr, X86::XORPSrr, X86::XORPDrr }, +}; + +// FIXME: Some shuffle and unpack instructions have equivalents in different +// domains, but they require a bit more work than just switching opcodes. + +static const unsigned *lookup(unsigned opcode, unsigned domain) { + for (unsigned i = 0, e = array_lengthof(ReplaceableInstrs); i != e; ++i) + if (ReplaceableInstrs[i][domain-1] == opcode) + return ReplaceableInstrs[i]; + return 0; +} - const SSEDomain domain = - SSEDomain((MI->getDesc().TSFlags >> X86II::SSEDomainShift) & 3); - if (domain == NotSSEDomain) - return domain; +std::pair<uint16_t, uint16_t> +X86InstrInfo::GetSSEDomain(const MachineInstr *MI) const { + uint16_t domain = (MI->getDesc().TSFlags >> X86II::SSEDomainShift) & 3; + return std::make_pair(domain, domain != NotSSEDomain && + lookup(MI->getOpcode(), domain) ? 0xe : 0); +} - // Linear search FTW! - const unsigned opc = MI->getOpcode(); - for (unsigned i = 0, e = array_lengthof(ReplaceableInstrs); i != e; ++i) - if (ReplaceableInstrs[i][domain-1] == opc) { - equiv = ReplaceableInstrs[i]; - return domain; - } - equiv = 0; - return domain; +void X86InstrInfo::SetSSEDomain(MachineInstr *MI, unsigned Domain) const { + assert(Domain>0 && Domain<4 && "Invalid execution domain"); + uint16_t dom = (MI->getDesc().TSFlags >> X86II::SSEDomainShift) & 3; + assert(dom && "Not an SSE instruction"); + const unsigned *table = lookup(MI->getOpcode(), dom); + assert(table && "Cannot change domain"); + MI->setDesc(get(table[Domain-1])); } |
