X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FTarget%2FX86%2FX86Subtarget.h;h=5a4f8c5e27e6359be50f7e3225301be9be4d675b;hb=88e1fd539e80827931694e667c119ef01c7d1184;hp=1e980f800d068bcfd80c9d21613efac844b4f64e;hpb=9eb59ec548b861d6ede05b4e6dc22aabf645e665;p=oota-llvm.git

diff --git a/lib/Target/X86/X86Subtarget.h b/lib/Target/X86/X86Subtarget.h
index 1e980f800d0..5a4f8c5e27e 100644
--- a/lib/Target/X86/X86Subtarget.h
+++ b/lib/Target/X86/X86Subtarget.h
@@ -1,9 +1,9 @@
-//=====-- X86Subtarget.h - Define TargetMachine for the X86 ---*- C++ -*--====//
+//=====---- X86Subtarget.h - Define Subtarget for the X86 -----*- C++ -*--====//
 //
 //                     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.
 //
 //===----------------------------------------------------------------------===//
 //
@@ -15,44 +15,226 @@
 #define X86SUBTARGET_H
 
 #include "llvm/Target/TargetSubtarget.h"
+#include <string>
 
 namespace llvm {
 class Module;
+class GlobalValue;
+class TargetMachine;
+  
+/// PICStyles - The X86 backend supports a number of different styles of PIC.
+/// 
+namespace PICStyles {
+enum Style {
+  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).
+};
+}
 
 class X86Subtarget : public TargetSubtarget {
+public:
+  enum AsmWriterFlavorTy {
+    // Note: This numbering has to match the GCC assembler dialects for inline
+    // asm alternatives to work right.
+    ATT = 0, Intel = 1, Unset
+  };
 protected:
+  enum X86SSEEnum {
+    NoMMXSSE, MMX, SSE1, SSE2, SSE3, SSSE3, SSE41, SSE42
+  };
+
+  enum X863DNowEnum {
+    NoThreeDNow, ThreeDNow, ThreeDNowA
+  };
+
+  /// AsmFlavor - Which x86 asm dialect to use.
+  ///
+  AsmWriterFlavorTy AsmFlavor;
+
+  /// PICStyle - Which PIC style to use
+  ///
+  PICStyles::Style PICStyle;
+  
+  /// X86SSELevel - MMX, SSE1, SSE2, SSE3, SSSE3, SSE41, SSE42, or
+  /// none supported.
+  X86SSEEnum X86SSELevel;
+
+  /// X863DNowLevel - 3DNow or 3DNow Athlon, or none supported.
+  ///
+  X863DNowEnum X863DNowLevel;
+
+  /// HasX86_64 - True if the processor supports X86-64 instructions.
+  ///
+  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;
 
-  /// Used by instruction selector
-  bool indirectExternAndWeakGlobals;
+  /// Max. memset / memcpy size that is turned into rep/movs, rep/stos ops.
+  ///
+  unsigned MaxInlineSizeThreshold;
+
+private:
+  /// Is64Bit - True if the processor supports 64-bit instructions and module
+  /// pointer size is 64 bit.
+  bool Is64Bit;
 
-  /// Used by the asm printer
-  bool asmDarwinLinkerStubs;
-  bool asmLeadingUnderscore;
-  bool asmAlignmentIsInBytes;
-  bool asmPrintDotLocalConstants;
-  bool asmPrintDotLCommConstants;
-  bool asmPrintConstantAlignment;
 public:
+  enum {
+    isELF, isCygwin, isDarwin, isWindows, isMingw
+  } TargetType;
+
   /// This constructor initializes the data members to match that
   /// of the specified module.
   ///
-  X86Subtarget(const Module &M);
+  X86Subtarget(const Module &M, const std::string &FS, bool is64Bit);
 
   /// getStackAlignment - Returns the minimum alignment known to hold of the
   /// stack frame on entry to the function and which must be maintained by every
   /// function for this subtarget.
   unsigned getStackAlignment() const { return stackAlignment; }
 
-  /// Returns true if the instruction selector should treat global values
-  /// referencing external or weak symbols as indirect rather than direct
-  /// references.
-  bool getIndirectExternAndWeakGlobals() const {
-    return indirectExternAndWeakGlobals;
+  /// getMaxInlineSizeThreshold - Returns the maximum memset / memcpy size
+  /// that still makes it profitable to inline the call.
+  unsigned getMaxInlineSizeThreshold() const { return MaxInlineSizeThreshold; }
+
+  /// ParseSubtargetFeatures - Parses features string setting specified
+  /// subtarget options.  Definition of function is auto generated by tblgen.
+  std::string ParseSubtargetFeatures(const std::string &FS,
+                                     const std::string &CPU);
+
+  /// AutoDetectSubtargetFeatures - Auto-detect CPU features using CPUID
+  /// instruction.
+  void AutoDetectSubtargetFeatures();
+
+  bool is64Bit() const { return Is64Bit; }
+
+  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;
+  }
+
+  bool isFlavorAtt() const { return AsmFlavor == ATT; }
+  bool isFlavorIntel() const { return AsmFlavor == Intel; }
+
+  bool isTargetDarwin() const { return TargetType == isDarwin; }
+  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;
+    if (is64Bit())
+      p = "e-p:64:64-s:64-f64:64:64-i64:64:64-f80:128:128";
+    else {
+      if (isTargetDarwin())
+        p = "e-p:32:32-f64:32:64-i64:32:64-f80:128:128";
+      else
+        p = "e-p:32:32-f64:32:64-i64:32:64-f80:32:32";
+    }
+    return std::string(p);
+  }
+
+  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
+  /// or index register of the address, not the GV offset field.
+  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 {
+  /// GetCpuIDAndInfo - Execute the specified cpuid and return the 4 values in
+  /// the specified arguments.  If we can't run cpuid on the host, return true.
+  bool GetCpuIDAndInfo(unsigned value, unsigned *rEAX, unsigned *rEBX,
+                       unsigned *rECX, unsigned *rEDX);
+}
+
 } // End llvm namespace
 
 #endif