[Isolates] Merge 6700:7030 from bleeding_edge to isolates.

src/ia32/assembler-ia32.h

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // All Rights Reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 // - Redistributions of source code must retain the above copyright notice,
 // this list of conditions and the following disclaimer.
 //
@@ skipping 12 matching lines @@
 // CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 // EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 // LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 // The original source code covered by the above license above has been
 // modified significantly by Google Inc.
-// Copyright 2010 the V8 project authors. All rights reserved.
+// Copyright 2011 the V8 project authors. All rights reserved.
 
 // A light-weight IA32 Assembler.
 
 #ifndef V8_IA32_ASSEMBLER_IA32_H_
 #define V8_IA32_ASSEMBLER_IA32_H_
 
 #include "isolate.h"
 #include "serialize.h"
 
 namespace v8 {
@@ skipping 14 matching lines @@
 //
 // 3) By not using an enum, we are possibly preventing the compiler from
 // doing certain constant folds, which may significantly reduce the
 // code generated for some assembly instructions (because they boil down
 // to a few constants). If this is a problem, we could change the code
 // such that we use an enum in optimized mode, and the struct in debug
 // mode. This way we get the compile-time error checking in debug mode
 // and best performance in optimized code.
 //
 struct Register {
-  static const int kNumAllocatableRegisters = 5;
+  static const int kNumAllocatableRegisters = 6;
   static const int kNumRegisters = 8;
 
-  static int ToAllocationIndex(Register reg) {
-    ASSERT(reg.code() < 4 || reg.code() == 7);
-    return (reg.code() == 7) ? 4 : reg.code();
-  }
+  static inline const char* AllocationIndexToString(int index);
 
-  static Register FromAllocationIndex(int index) {
-    ASSERT(index >= 0 && index < kNumAllocatableRegisters);
-    return (index == 4) ? from_code(7) : from_code(index);
-  }
+  static inline int ToAllocationIndex(Register reg);
 
-  static const char* AllocationIndexToString(int index) {
-    ASSERT(index >= 0 && index < kNumAllocatableRegisters);
-    const char* const names[] = {
-      "eax",
-      "ecx",
-      "edx",
-      "ebx",
-      "edi"
-    };
-    return names[index];
-  }
+  static inline Register FromAllocationIndex(int index);
 
   static Register from_code(int code) {
     Register r = { code };
     return r;
   }
   bool is_valid() const { return 0 <= code_ && code_ < kNumRegisters; }
   bool is(Register reg) const { return code_ == reg.code_; }
   // eax, ebx, ecx and edx are byte registers, the rest are not.
   bool is_byte_register() const { return code_ <= 3; }
   int code() const {
     ASSERT(is_valid());
     return code_;
   }
   int bit() const {
     ASSERT(is_valid());
     return 1 << code_;
   }
 
   // Unfortunately we can't make this private in a struct.
   int code_;
 };
 
+
 const Register eax = { 0 };
 const Register ecx = { 1 };
 const Register edx = { 2 };
 const Register ebx = { 3 };
 const Register esp = { 4 };
 const Register ebp = { 5 };
 const Register esi = { 6 };
 const Register edi = { 7 };
 const Register no_reg = { -1 };
 
 
+inline const char* Register::AllocationIndexToString(int index) {
+  ASSERT(index >= 0 && index < kNumAllocatableRegisters);
+  // This is the mapping of allocation indices to registers.
+  const char* const kNames[] = { "eax", "ecx", "edx", "ebx", "esi", "edi" };
+  return kNames[index];
+}
+
+
+inline int Register::ToAllocationIndex(Register reg) {
+  ASSERT(reg.is_valid() && !reg.is(esp) && !reg.is(ebp));
+  return (reg.code() >= 6) ? reg.code() - 2 : reg.code();
+}
+
+
+inline Register Register::FromAllocationIndex(int index)  {
+  ASSERT(index >= 0 && index < kNumAllocatableRegisters);
+  return (index >= 4) ? from_code(index + 2) : from_code(index);
+}
+
+
 struct XMMRegister {
   static const int kNumAllocatableRegisters = 7;
   static const int kNumRegisters = 8;
 
   static int ToAllocationIndex(XMMRegister reg) {
     ASSERT(reg.code() != 0);
     return reg.code() - 1;
   }
 
   static XMMRegister FromAllocationIndex(int index) {
@@ skipping 37 matching lines @@
 const XMMRegister xmm3 = { 3 };
 const XMMRegister xmm4 = { 4 };
 const XMMRegister xmm5 = { 5 };
 const XMMRegister xmm6 = { 6 };
 const XMMRegister xmm7 = { 7 };
 
 
 typedef XMMRegister DoubleRegister;
 
 
-// Index of register used in pusha/popa.
-// Order of pushed registers: EAX, ECX, EDX, EBX, ESP, EBP, ESI, and EDI
-inline int EspIndexForPushAll(Register reg) {
-  return Register::kNumRegisters - 1 - reg.code();
-}
-
-
 enum Condition {
   // any value < 0 is considered no_condition
   no_condition  = -1,
 
   overflow      =  0,
   no_overflow   =  1,
   below         =  2,
   above_equal   =  3,
   equal         =  4,
   not_equal     =  5,
@@ skipping 762 matching lines @@
   // Check the code size generated from label to here.
   int SizeOfCodeGeneratedSince(Label* l) { return pc_offset() - l->pos(); }
 
   // Mark address of the ExitJSFrame code.
   void RecordJSReturn();
 
   // Mark address of a debug break slot.
   void RecordDebugBreakSlot();
 
   // Record a comment relocation entry that can be used by a disassembler.
-  // Use --code-comments to enable.
-  void RecordComment(const char* msg);
+  // Use --code-comments to enable, or provide "force = true" flag to always
+  // write a comment.
+  void RecordComment(const char* msg, bool force = false);
 
   // Writes a single byte or word of data in the code stream.  Used for
   // inline tables, e.g., jump-tables.
   void db(uint8_t data);
   void dd(uint32_t data);
 
   int pc_offset() const { return pc_ - buffer_; }
 
   // Check if there is less than kGap bytes available in the buffer.
   // If this is the case, we need to grow the buffer before emitting
   // an instruction or relocation information.
   inline bool overflow() const { return pc_ >= reloc_info_writer.pos() - kGap; }
 
   // Get the number of bytes available in the buffer.
   inline int available_space() const { return reloc_info_writer.pos() - pc_; }
 
   static bool IsNop(Address addr) { return *addr == 0x90; }
 
   PositionsRecorder* positions_recorder() { return &positions_recorder_; }
 
+  int relocation_writer_size() {
+    return (buffer_ + buffer_size_) - reloc_info_writer.pos();
+  }
+
   // Avoid overflows for displacements etc.
   static const int kMaximalBufferSize = 512*MB;
   static const int kMinimalBufferSize = 4*KB;
 
  protected:
   void movsd(XMMRegister dst, const Operand& src);
   void movsd(const Operand& dst, XMMRegister src);
 
   void emit_sse_operand(XMMRegister reg, const Operand& adr);
   void emit_sse_operand(XMMRegister dst, XMMRegister src);
@@ skipping 92 matching lines @@
  private:
   Assembler* assembler_;
 #ifdef DEBUG
   int space_before_;
 #endif
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_IA32_ASSEMBLER_IA32_H_