X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FTarget%2FX86%2FX86Subtarget.h;h=5a4f8c5e27e6359be50f7e3225301be9be4d675b;hb=88e1fd539e80827931694e667c119ef01c7d1184;hp=c0a4f2410c0a0d665a4cc4bc087c99ecbd5f2b07;hpb=fc05f402ea22e8a9ae465d209b65be7e857a89ff;p=oota-llvm.git diff --git a/lib/Target/X86/X86Subtarget.h b/lib/Target/X86/X86Subtarget.h index c0a4f2410c0..5a4f8c5e27e 100644 --- a/lib/Target/X86/X86Subtarget.h +++ b/lib/Target/X86/X86Subtarget.h @@ -2,8 +2,8 @@ // // The LLVM Compiler Infrastructure // -// This file was developed by Nate Begeman and is distributed under the -// University of Illinois Open Source License. See LICENSE.TXT for details. +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// // @@ -15,7 +15,6 @@ #define X86SUBTARGET_H #include "llvm/Target/TargetSubtarget.h" - #include namespace llvm { @@ -23,9 +22,14 @@ class Module; class GlobalValue; class TargetMachine; -namespace PICStyle { +/// PICStyles - The X86 backend supports a number of different styles of PIC. +/// +namespace PICStyles { enum Style { - Stub, GOT, RIPRel, WinPIC, None + Stub, // Used on i386-darwin + GOT, // Used on many 32-bit unices. + RIPRel, // Used on X86-64 when not in -static mode. + None // Set when in -static mode (not PIC or DynamicNoPIC mode). }; } @@ -38,7 +42,7 @@ public: }; protected: enum X86SSEEnum { - NoMMXSSE, MMX, SSE1, SSE2, SSE3, SSSE3 + NoMMXSSE, MMX, SSE1, SSE2, SSE3, SSSE3, SSE41, SSE42 }; enum X863DNowEnum { @@ -51,10 +55,10 @@ protected: /// PICStyle - Which PIC style to use /// - PICStyle::Style PICStyle; + PICStyles::Style PICStyle; - /// X86SSELevel - MMX, SSE1, SSE2, SSE3, SSSE3, or none supported. - /// + /// X86SSELevel - MMX, SSE1, SSE2, SSE3, SSSE3, SSE41, SSE42, or + /// none supported. X86SSEEnum X86SSELevel; /// X863DNowLevel - 3DNow or 3DNow Athlon, or none supported. @@ -65,6 +69,28 @@ protected: /// bool HasX86_64; + /// HasSSE4A - True if the processor supports SSE4A instructions. + bool HasSSE4A; + + /// HasAVX - Target has AVX instructions + bool HasAVX; + + /// HasFMA3 - Target has 3-operand fused multiply-add + bool HasFMA3; + + /// HasFMA4 - Target has 4-operand fused multiply-add + bool HasFMA4; + + /// IsBTMemSlow - True if BT (bit test) of memory instructions are slow. + bool IsBTMemSlow; + + /// DarwinVers - Nonzero if this is a darwin platform: the numeric + /// version of the platform, e.g. 8 = 10.4 (Tiger), 9 = 10.5 (Leopard), etc. + unsigned char DarwinVers; // Is any darwin-x86 platform. + + /// isLinux - true if this is a "linux" platform. + bool IsLinux; + /// stackAlignment - The minimum alignment known to hold of the stack frame on /// entry to the function and which must be maintained by every function. unsigned stackAlignment; @@ -78,10 +104,6 @@ private: /// pointer size is 64 bit. bool Is64Bit; - /// HasLow4GUserAddress - True if the low 4G user-space address is available. - /// - bool HasLow4GUserAddress; - public: enum { isELF, isCygwin, isDarwin, isWindows, isMingw @@ -103,7 +125,8 @@ public: /// ParseSubtargetFeatures - Parses features string setting specified /// subtarget options. Definition of function is auto generated by tblgen. - void ParseSubtargetFeatures(const std::string &FS, const std::string &CPU); + std::string ParseSubtargetFeatures(const std::string &FS, + const std::string &CPU); /// AutoDetectSubtargetFeatures - Auto-detect CPU features using CPUID /// instruction. @@ -111,20 +134,24 @@ public: bool is64Bit() const { return Is64Bit; } - /// hasLow4GUserSpaceAddress - True if lower 4G user-space address is - /// available. - bool hasLow4GUserSpaceAddress() const { return HasLow4GUserAddress; } - - PICStyle::Style getPICStyle() const { return PICStyle; } - void setPICStyle(PICStyle::Style Style) { PICStyle = Style; } + PICStyles::Style getPICStyle() const { return PICStyle; } + void setPICStyle(PICStyles::Style Style) { PICStyle = Style; } bool hasMMX() const { return X86SSELevel >= MMX; } bool hasSSE1() const { return X86SSELevel >= SSE1; } bool hasSSE2() const { return X86SSELevel >= SSE2; } bool hasSSE3() const { return X86SSELevel >= SSE3; } bool hasSSSE3() const { return X86SSELevel >= SSSE3; } + bool hasSSE41() const { return X86SSELevel >= SSE41; } + bool hasSSE42() const { return X86SSELevel >= SSE42; } + bool hasSSE4A() const { return HasSSE4A; } bool has3DNow() const { return X863DNowLevel >= ThreeDNow; } bool has3DNowA() const { return X863DNowLevel >= ThreeDNowA; } + bool hasAVX() const { return HasAVX; } + bool hasFMA3() const { return HasFMA3; } + bool hasFMA4() const { return HasFMA4; } + + bool isBTMemSlow() const { return IsBTMemSlow; } unsigned getAsmFlavor() const { return AsmFlavor != Unset ? unsigned(AsmFlavor) : 0; @@ -134,12 +161,17 @@ public: bool isFlavorIntel() const { return AsmFlavor == Intel; } bool isTargetDarwin() const { return TargetType == isDarwin; } - bool isTargetELF() const { return TargetType == isELF; } + bool isTargetELF() const { + return TargetType == isELF; + } bool isTargetWindows() const { return TargetType == isWindows; } bool isTargetMingw() const { return TargetType == isMingw; } bool isTargetCygMing() const { return (TargetType == isMingw || TargetType == isCygwin); } bool isTargetCygwin() const { return TargetType == isCygwin; } + bool isTargetWin64() const { + return (Is64Bit && (TargetType == isMingw || TargetType == isWindows)); + } std::string getDataLayout() const { const char *p; @@ -154,12 +186,17 @@ public: return std::string(p); } - bool isPICStyleSet() const { return PICStyle != PICStyle::None; } - bool isPICStyleGOT() const { return PICStyle == PICStyle::GOT; } - bool isPICStyleStub() const { return PICStyle == PICStyle::Stub; } - bool isPICStyleRIPRel() const { return PICStyle == PICStyle::RIPRel; } - bool isPICStyleWinPIC() const { return PICStyle == PICStyle:: WinPIC; } - + bool isPICStyleSet() const { return PICStyle != PICStyles::None; } + bool isPICStyleGOT() const { return PICStyle == PICStyles::GOT; } + bool isPICStyleStub() const { return PICStyle == PICStyles::Stub; } + bool isPICStyleRIPRel() const { return PICStyle == PICStyles::RIPRel; } + + /// getDarwinVers - Return the darwin version number, 8 = tiger, 9 = leopard. + unsigned getDarwinVers() const { return DarwinVers; } + + /// isLinux - Return true if the target is "Linux". + bool isLinux() const { return IsLinux; } + /// True if accessing the GV requires an extra load. For Windows, dllimported /// symbols are indirect, loading the value at address GV rather then the /// value of GV itself. This means that the GlobalAddress must be in the base @@ -167,6 +204,28 @@ public: bool GVRequiresExtraLoad(const GlobalValue* GV, const TargetMachine& TM, bool isDirectCall) const; + /// True if accessing the GV requires a register. This is a superset of the + /// cases where GVRequiresExtraLoad is true. Some variations of PIC require + /// a register, but not an extra load. + bool GVRequiresRegister(const GlobalValue* GV, const TargetMachine& TM, + bool isDirectCall) const; + + /// IsLegalToCallImmediateAddr - Return true if the subtarget allows calls + /// to immediate address. + bool IsLegalToCallImmediateAddr(const TargetMachine &TM) const; + + /// This function returns the name of a function which has an interface + /// like the non-standard bzero function, if such a function exists on + /// the current subtarget and it is considered prefereable over + /// memset with zero passed as the second argument. Otherwise it + /// returns null. + const char *getBZeroEntry() const; + + /// getSpecialAddressLatency - For targets where it is beneficial to + /// backschedule instructions that compute addresses, return a value + /// indicating the number of scheduling cycles of backscheduling that + /// should be attempted. + unsigned getSpecialAddressLatency() const; }; namespace X86 {