diff options
Diffstat (limited to 'lib/Target/X86/X86Subtarget.cpp')
| -rw-r--r-- | lib/Target/X86/X86Subtarget.cpp | 71 |
1 files changed, 51 insertions, 20 deletions
diff --git a/lib/Target/X86/X86Subtarget.cpp b/lib/Target/X86/X86Subtarget.cpp index 6e092c7..3eb9441 100644 --- a/lib/Target/X86/X86Subtarget.cpp +++ b/lib/Target/X86/X86Subtarget.cpp @@ -198,7 +198,7 @@ void X86Subtarget::AutoDetectSubtargetFeatures() { if ((ECX >> 19) & 1) { X86SSELevel = SSE41; ToggleFeature(X86::FeatureSSE41);} if ((ECX >> 20) & 1) { X86SSELevel = SSE42; ToggleFeature(X86::FeatureSSE42);} // FIXME: AVX codegen support is not ready. - //if ((ECX >> 28) & 1) { HasAVX = true; ToggleFeature(X86::FeatureAVX); } + //if ((ECX >> 28) & 1) { X86SSELevel = AVX; ToggleFeature(X86::FeatureAVX); } bool IsIntel = memcmp(text.c, "GenuineIntel", 12) == 0; bool IsAMD = !IsIntel && memcmp(text.c, "AuthenticAMD", 12) == 0; @@ -246,6 +246,7 @@ void X86Subtarget::AutoDetectSubtargetFeatures() { IsBTMemSlow = true; ToggleFeature(X86::FeatureSlowBTMem); } + // If it's Nehalem, unaligned memory access is fast. // FIXME: Nehalem is family 6. Also include Westmere and later processors? if (Family == 15 && Model == 26) { @@ -253,6 +254,12 @@ void X86Subtarget::AutoDetectSubtargetFeatures() { ToggleFeature(X86::FeatureFastUAMem); } + // Set processor type. Currently only Atom is detected. + if (Family == 6 && Model == 28) { + X86ProcFamily = IntelAtom; + ToggleFeature(X86::FeatureLeaForSP); + } + unsigned MaxExtLevel; X86_MC::GetCpuIDAndInfo(0x80000000, &MaxExtLevel, &EBX, &ECX, &EDX); @@ -266,15 +273,19 @@ void X86Subtarget::AutoDetectSubtargetFeatures() { HasLZCNT = true; ToggleFeature(X86::FeatureLZCNT); } - if (IsAMD && ((ECX >> 6) & 0x1)) { - HasSSE4A = true; - ToggleFeature(X86::FeatureSSE4A); - } - if (IsAMD && ((ECX >> 16) & 0x1)) { - HasFMA4 = true; - ToggleFeature(X86::FeatureFMA4); - HasXOP = true; - ToggleFeature(X86::FeatureXOP); + if (IsAMD) { + if ((ECX >> 6) & 0x1) { + HasSSE4A = true; + ToggleFeature(X86::FeatureSSE4A); + } + if ((ECX >> 11) & 0x1) { + HasXOP = true; + ToggleFeature(X86::FeatureXOP); + } + if ((ECX >> 16) & 0x1) { + HasFMA4 = true; + ToggleFeature(X86::FeatureFMA4); + } } } } @@ -291,7 +302,7 @@ void X86Subtarget::AutoDetectSubtargetFeatures() { } // FIXME: AVX2 codegen support is not ready. //if ((EBX >> 5) & 0x1) { - // HasAVX2 = true; + // X86SSELevel = AVX2; // ToggleFeature(X86::FeatureAVX2); //} if ((EBX >> 8) & 0x1) { @@ -306,6 +317,7 @@ X86Subtarget::X86Subtarget(const std::string &TT, const std::string &CPU, const std::string &FS, unsigned StackAlignOverride, bool is64Bit) : X86GenSubtargetInfo(TT, CPU, FS) + , X86ProcFamily(Others) , PICStyle(PICStyles::None) , X86SSELevel(NoMMXSSE) , X863DNowLevel(NoThreeDNow) @@ -313,8 +325,6 @@ X86Subtarget::X86Subtarget(const std::string &TT, const std::string &CPU, , HasX86_64(false) , HasPOPCNT(false) , HasSSE4A(false) - , HasAVX(false) - , HasAVX2(false) , HasAES(false) , HasCLMUL(false) , HasFMA3(false) @@ -331,16 +341,19 @@ X86Subtarget::X86Subtarget(const std::string &TT, const std::string &CPU, , IsUAMemFast(false) , HasVectorUAMem(false) , HasCmpxchg16b(false) - , stackAlignment(8) + , UseLeaForSP(false) + , PostRAScheduler(false) + , stackAlignment(4) // FIXME: this is a known good value for Yonah. How about others? , MaxInlineSizeThreshold(128) , TargetTriple(TT) , In64BitMode(is64Bit) { // Determine default and user specified characteristics + std::string CPUName = CPU; if (!FS.empty() || !CPU.empty()) { - std::string CPUName = CPU; if (CPUName.empty()) { -#if defined (__x86_64__) || defined(__i386__) +#if defined(i386) || defined(__i386__) || defined(__x86__) || defined(_M_IX86)\ + || defined(__x86_64__) || defined(_M_AMD64) || defined (_M_X64) CPUName = sys::getHostCPUName(); #else CPUName = "generic"; @@ -360,6 +373,13 @@ X86Subtarget::X86Subtarget(const std::string &TT, const std::string &CPU, // If feature string is not empty, parse features string. ParseSubtargetFeatures(CPUName, FullFS); } else { + if (CPUName.empty()) { +#if defined (__x86_64__) || defined(__i386__) + CPUName = sys::getHostCPUName(); +#else + CPUName = "generic"; +#endif + } // Otherwise, use CPUID to auto-detect feature set. AutoDetectSubtargetFeatures(); @@ -368,7 +388,7 @@ X86Subtarget::X86Subtarget(const std::string &TT, const std::string &CPU, HasX86_64 = true; ToggleFeature(X86::Feature64Bit); HasCMov = true; ToggleFeature(X86::FeatureCMOV); - if (!HasAVX && X86SSELevel < SSE2) { + if (X86SSELevel < SSE2) { X86SSELevel = SSE2; ToggleFeature(X86::FeatureSSE1); ToggleFeature(X86::FeatureSSE2); @@ -376,14 +396,16 @@ X86Subtarget::X86Subtarget(const std::string &TT, const std::string &CPU, } } + if (X86ProcFamily == IntelAtom) { + PostRAScheduler = true; + InstrItins = getInstrItineraryForCPU(CPUName); + } + // It's important to keep the MCSubtargetInfo feature bits in sync with // target data structure which is shared with MC code emitter, etc. if (In64BitMode) ToggleFeature(X86::Mode64Bit); - if (HasAVX) - X86SSELevel = NoMMXSSE; - DEBUG(dbgs() << "Subtarget features: SSELevel " << X86SSELevel << ", 3DNowLevel " << X863DNowLevel << ", 64bit " << HasX86_64 << "\n"); @@ -398,3 +420,12 @@ X86Subtarget::X86Subtarget(const std::string &TT, const std::string &CPU, isTargetSolaris() || In64BitMode) stackAlignment = 16; } + +bool X86Subtarget::enablePostRAScheduler( + CodeGenOpt::Level OptLevel, + TargetSubtargetInfo::AntiDepBreakMode& Mode, + RegClassVector& CriticalPathRCs) const { + Mode = TargetSubtargetInfo::ANTIDEP_CRITICAL; + CriticalPathRCs.clear(); + return PostRAScheduler && OptLevel >= CodeGenOpt::Default; +} |