Merge experimental/a64 to bleeding_edge.

src/a64/frames-a64.h

-// Copyright 2012 the V8 project authors. All rights reserved.
+// Copyright 2013 the V8 project authors. 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.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
 //       with the distribution.
 //     * Neither the name of Google Inc. nor the names of its
 //       contributors may be used to endorse or promote products derived
 //       from this software without specific prior written permission.
 //
 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 // OWNER OR 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.
 
-#ifndef V8_X64_FRAMES_X64_H_
-#define V8_X64_FRAMES_X64_H_
+#include "a64/constants-a64.h"
+#include "a64/assembler-a64.h"
+
+#ifndef V8_A64_FRAMES_A64_H_
+#define V8_A64_FRAMES_A64_H_
 
 namespace v8 {
 namespace internal {
 
-const int kNumRegs = 16;
-const RegList kJSCallerSaved =
-    1 << 0 |  // rax
-    1 << 1 |  // rcx
-    1 << 2 |  // rdx
-    1 << 3 |  // rbx - used as a caller-saved register in JavaScript code
-    1 << 7;   // rdi - callee function
-
-const int kNumJSCallerSaved = 5;
-
+const int kNumRegs = kNumberOfRegisters;
+// Registers x0-x17 are caller-saved.
+const int kNumJSCallerSaved = 18;
+const RegList kJSCallerSaved = 0x3ffff;
 typedef Object* JSCallerSavedBuffer[kNumJSCallerSaved];
 
-// Number of registers for which space is reserved in safepoints.
-const int kNumSafepointRegisters = 16;
+// Number of registers for which space is reserved in safepoints. Must be a
+// multiple of eight.
+// TODO(all): Refine this number.
+const int kNumSafepointRegisters = 32;
 
-// ----------------------------------------------------
+// Define the list of registers actually saved at safepoints.
+// Note that the number of saved registers may be smaller than the reserved
+// space, i.e. kNumSafepointSavedRegisters <= kNumSafepointRegisters.
+#define kSafepointSavedRegisters CPURegList::GetSafepointSavedRegisters().list()
+#define kNumSafepointSavedRegisters \
+  CPURegList::GetSafepointSavedRegisters().Count();
 
 class EntryFrameConstants : public AllStatic {
  public:
-#ifdef _WIN64
-  static const int kCalleeSaveXMMRegisters = 10;
-  static const int kXMMRegisterSize = 16;
-  static const int kXMMRegistersBlockSize =
-      kXMMRegisterSize * kCalleeSaveXMMRegisters;
   static const int kCallerFPOffset =
-      -10 * kPointerSize - kXMMRegistersBlockSize;
-#else
-  static const int kCallerFPOffset      = -8 * kPointerSize;
-#endif
-  static const int kArgvOffset          = 6 * kPointerSize;
+      -(StandardFrameConstants::kFixedFrameSizeFromFp + kPointerSize);
 };
 
 
 class ExitFrameConstants : public AllStatic {
  public:
-  static const int kFrameSize       = 2 * kPointerSize;
+  static const int kFrameSize            =  2 * kPointerSize;
 
-  static const int kCodeOffset      = -2 * kPointerSize;
-  static const int kSPOffset        = -1 * kPointerSize;
-
-  static const int kCallerFPOffset  = +0 * kPointerSize;
-  static const int kCallerPCOffset  = kFPOnStackSize;
-
-  // FP-relative displacement of the caller's SP.  It points just
-  // below the saved PC.
-  static const int kCallerSPDisplacement = kCallerPCOffset + kPCOnStackSize;
+  static const int kCallerSPDisplacement =  2 * kPointerSize;
+  static const int kCallerPCOffset       =  1 * kPointerSize;
+  static const int kCallerFPOffset       =  0 * kPointerSize;   // <- fp
+  static const int kSPOffset             = -1 * kPointerSize;
+  static const int kCodeOffset           = -2 * kPointerSize;
+  static const int kLastExitFrameField   = kCodeOffset;
 };
 
 
 class JavaScriptFrameConstants : public AllStatic {
  public:
   // FP-relative.
   static const int kLocal0Offset = StandardFrameConstants::kExpressionsOffset;
-  static const int kLastParameterOffset = kFPOnStackSize + kPCOnStackSize;
+
+  // There are two words on the stack (saved fp and saved lr) between fp and
+  // the arguments.
+  static const int kLastParameterOffset = 2 * kPointerSize;
+
   static const int kFunctionOffset = StandardFrameConstants::kMarkerOffset;
-
-  // Caller SP-relative.
-  static const int kParam0Offset   = -2 * kPointerSize;
-  static const int kReceiverOffset = -1 * kPointerSize;
 };
 
 
 class ArgumentsAdaptorFrameConstants : public AllStatic {
  public:
   // FP-relative.
   static const int kLengthOffset = StandardFrameConstants::kExpressionsOffset;
 
   static const int kFrameSize =
       StandardFrameConstants::kFixedFrameSize + kPointerSize;
 };
 
 
 class ConstructFrameConstants : public AllStatic {
  public:
   // FP-relative.
-  static const int kImplicitReceiverOffset = -5 * kPointerSize;
-  static const int kConstructorOffset      = kMinInt;
+  static const int kCodeOffset = StandardFrameConstants::kExpressionsOffset;
   static const int kLengthOffset           = -4 * kPointerSize;
-  static const int kCodeOffset = StandardFrameConstants::kExpressionsOffset;
+  static const int kConstructorOffset      = -5 * kPointerSize;
+  static const int kImplicitReceiverOffset = -6 * kPointerSize;
 
   static const int kFrameSize =
-      StandardFrameConstants::kFixedFrameSize + 3 * kPointerSize;
+      StandardFrameConstants::kFixedFrameSize + 4 * kPointerSize;
 };
 
 
 class InternalFrameConstants : public AllStatic {
  public:
   // FP-relative.
   static const int kCodeOffset = StandardFrameConstants::kExpressionsOffset;
 };
 
 
 inline Object* JavaScriptFrame::function_slot_object() const {
   const int offset = JavaScriptFrameConstants::kFunctionOffset;
   return Memory::Object_at(fp() + offset);
 }
 
 
 inline void StackHandler::SetFp(Address slot, Address fp) {
   Memory::Address_at(slot) = fp;
 }
 
 
 } }  // namespace v8::internal
 
-#endif  // V8_X64_FRAMES_X64_H_
+#endif  // V8_A64_FRAMES_A64_H_