X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FTarget%2FX86%2FX86Subtarget.h;h=5a4f8c5e27e6359be50f7e3225301be9be4d675b;hb=15a380a03567deba90c074a2cd5a45b81ae0958b;hp=493c801f8ce427e7b4fe54b9d554fb302754017d;hpb=29d62bebd91fbd8a79996c3983dcd567c30c112c;p=oota-llvm.git

diff --git a/lib/Target/X86/X86Subtarget.h b/lib/Target/X86/X86Subtarget.h
index 493c801f8ce..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 <string>
 
 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.
@@ -65,23 +69,41 @@ 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;
 
-  /// Min. memset / memcpy size that is turned into rep/movs, rep/stos ops.
+  /// Max. memset / memcpy size that is turned into rep/movs, rep/stos ops.
   ///
-  unsigned MinRepStrSizeThreshold;
+  unsigned MaxInlineSizeThreshold;
 
 private:
   /// Is64Bit - True if the processor supports 64-bit instructions and module
   /// 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
@@ -97,15 +119,14 @@ public:
   /// function for this subtarget.
   unsigned getStackAlignment() const { return stackAlignment; }
 
-  /// getMinRepStrSizeThreshold - Returns the minimum memset / memcpy size
-  /// required to turn the operation into a X86 rep/movs or rep/stos
-  /// instruction. This is only used if the src / dst alignment is not DWORD
-  /// aligned.
-  unsigned getMinRepStrSizeThreshold() const { return MinRepStrSizeThreshold; }
+  /// 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.
-  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.
@@ -113,20 +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;
@@ -136,17 +161,22 @@ 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;
     if (is64Bit())
-      p = "e-p:64:64-f64:64:64-i64:64:64-f80:128:128";
+      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";
@@ -156,12 +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
@@ -169,6 +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 {