Move V8 to external/v8
Change-Id: If68025d67453785a651c5dfb34fad298c16676a4
diff --git a/src/arm/macro-assembler-arm.h b/src/arm/macro-assembler-arm.h
new file mode 100644
index 0000000..ee9d70d
--- /dev/null
+++ b/src/arm/macro-assembler-arm.h
@@ -0,0 +1,402 @@
+// Copyright 2006-2009 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_ARM_MACRO_ASSEMBLER_ARM_H_
+#define V8_ARM_MACRO_ASSEMBLER_ARM_H_
+
+#include "assembler.h"
+
+namespace v8 {
+namespace internal {
+
+
+// Give alias names to registers
+const Register cp = { 8 }; // JavaScript context pointer
+
+
+enum InvokeJSFlags {
+ CALL_JS,
+ JUMP_JS
+};
+
+
+// MacroAssembler implements a collection of frequently used macros.
+class MacroAssembler: public Assembler {
+ public:
+ MacroAssembler(void* buffer, int size);
+
+ // ---------------------------------------------------------------------------
+ // Low-level helpers for compiler
+
+ // Jump, Call, and Ret pseudo instructions implementing inter-working
+ private:
+ void Jump(intptr_t target, RelocInfo::Mode rmode, Condition cond = al);
+ void Call(intptr_t target, RelocInfo::Mode rmode, Condition cond = al);
+ public:
+ void Jump(Register target, Condition cond = al);
+ void Jump(byte* target, RelocInfo::Mode rmode, Condition cond = al);
+ void Jump(Handle<Code> code, RelocInfo::Mode rmode, Condition cond = al);
+ void Call(Register target, Condition cond = al);
+ void Call(byte* target, RelocInfo::Mode rmode, Condition cond = al);
+ void Call(Handle<Code> code, RelocInfo::Mode rmode, Condition cond = al);
+ void Ret(Condition cond = al);
+ // Jumps to the label at the index given by the Smi in "index".
+ void SmiJumpTable(Register index, Vector<Label*> targets);
+ // Load an object from the root table.
+ void LoadRoot(Register destination,
+ Heap::RootListIndex index,
+ Condition cond = al);
+
+ // Sets the remembered set bit for [address+offset], where address is the
+ // address of the heap object 'object'. The address must be in the first 8K
+ // of an allocated page. The 'scratch' register is used in the
+ // implementation and all 3 registers are clobbered by the operation, as
+ // well as the ip register.
+ void RecordWrite(Register object, Register offset, Register scratch);
+
+ // ---------------------------------------------------------------------------
+ // Activation frames
+
+ void EnterInternalFrame() { EnterFrame(StackFrame::INTERNAL); }
+ void LeaveInternalFrame() { LeaveFrame(StackFrame::INTERNAL); }
+
+ void EnterConstructFrame() { EnterFrame(StackFrame::CONSTRUCT); }
+ void LeaveConstructFrame() { LeaveFrame(StackFrame::CONSTRUCT); }
+
+ // Enter specific kind of exit frame; either EXIT or
+ // EXIT_DEBUG. Expects the number of arguments in register r0 and
+ // the builtin function to call in register r1. Exits with argc in
+ // r4, argv in r6, and and the builtin function to call in r5.
+ void EnterExitFrame(StackFrame::Type type);
+
+ // Leave the current exit frame. Expects the return value in r0.
+ void LeaveExitFrame(StackFrame::Type type);
+
+ // Align the stack by optionally pushing a Smi zero.
+ void AlignStack(int offset);
+
+ // ---------------------------------------------------------------------------
+ // JavaScript invokes
+
+ // Invoke the JavaScript function code by either calling or jumping.
+ void InvokeCode(Register code,
+ const ParameterCount& expected,
+ const ParameterCount& actual,
+ InvokeFlag flag);
+
+ void InvokeCode(Handle<Code> code,
+ const ParameterCount& expected,
+ const ParameterCount& actual,
+ RelocInfo::Mode rmode,
+ InvokeFlag flag);
+
+ // Invoke the JavaScript function in the given register. Changes the
+ // current context to the context in the function before invoking.
+ void InvokeFunction(Register function,
+ const ParameterCount& actual,
+ InvokeFlag flag);
+
+
+#ifdef ENABLE_DEBUGGER_SUPPORT
+ // ---------------------------------------------------------------------------
+ // Debugger Support
+
+ void SaveRegistersToMemory(RegList regs);
+ void RestoreRegistersFromMemory(RegList regs);
+ void CopyRegistersFromMemoryToStack(Register base, RegList regs);
+ void CopyRegistersFromStackToMemory(Register base,
+ Register scratch,
+ RegList regs);
+#endif
+
+ // ---------------------------------------------------------------------------
+ // Exception handling
+
+ // Push a new try handler and link into try handler chain.
+ // The return address must be passed in register lr.
+ // On exit, r0 contains TOS (code slot).
+ void PushTryHandler(CodeLocation try_location, HandlerType type);
+
+
+ // ---------------------------------------------------------------------------
+ // Inline caching support
+
+ // Generates code that verifies that the maps of objects in the
+ // prototype chain of object hasn't changed since the code was
+ // generated and branches to the miss label if any map has. If
+ // necessary the function also generates code for security check
+ // in case of global object holders. The scratch and holder
+ // registers are always clobbered, but the object register is only
+ // clobbered if it the same as the holder register. The function
+ // returns a register containing the holder - either object_reg or
+ // holder_reg.
+ Register CheckMaps(JSObject* object, Register object_reg,
+ JSObject* holder, Register holder_reg,
+ Register scratch, Label* miss);
+
+ // Generate code for checking access rights - used for security checks
+ // on access to global objects across environments. The holder register
+ // is left untouched, whereas both scratch registers are clobbered.
+ void CheckAccessGlobalProxy(Register holder_reg,
+ Register scratch,
+ Label* miss);
+
+
+ // ---------------------------------------------------------------------------
+ // Allocation support
+
+ // Allocate an object in new space. The object_size is specified in words (not
+ // bytes). If the new space is exhausted control continues at the gc_required
+ // label. The allocated object is returned in result. If the flag
+ // tag_allocated_object is true the result is tagged as as a heap object.
+ void AllocateInNewSpace(int object_size,
+ Register result,
+ Register scratch1,
+ Register scratch2,
+ Label* gc_required,
+ AllocationFlags flags);
+ void AllocateInNewSpace(Register object_size,
+ Register result,
+ Register scratch1,
+ Register scratch2,
+ Label* gc_required,
+ AllocationFlags flags);
+
+ // Undo allocation in new space. The object passed and objects allocated after
+ // it will no longer be allocated. The caller must make sure that no pointers
+ // are left to the object(s) no longer allocated as they would be invalid when
+ // allocation is undone.
+ void UndoAllocationInNewSpace(Register object, Register scratch);
+
+ // ---------------------------------------------------------------------------
+ // Support functions.
+
+ // Try to get function prototype of a function and puts the value in
+ // the result register. Checks that the function really is a
+ // function and jumps to the miss label if the fast checks fail. The
+ // function register will be untouched; the other registers may be
+ // clobbered.
+ void TryGetFunctionPrototype(Register function,
+ Register result,
+ Register scratch,
+ Label* miss);
+
+ // Compare object type for heap object. heap_object contains a non-Smi
+ // whose object type should be compared with the given type. This both
+ // sets the flags and leaves the object type in the type_reg register.
+ // It leaves the map in the map register (unless the type_reg and map register
+ // are the same register). It leaves the heap object in the heap_object
+ // register unless the heap_object register is the same register as one of the
+ // other registers.
+ void CompareObjectType(Register heap_object,
+ Register map,
+ Register type_reg,
+ InstanceType type);
+
+ // Compare instance type in a map. map contains a valid map object whose
+ // object type should be compared with the given type. This both
+ // sets the flags and leaves the object type in the type_reg register. It
+ // leaves the heap object in the heap_object register unless the heap_object
+ // register is the same register as type_reg.
+ void CompareInstanceType(Register map,
+ Register type_reg,
+ InstanceType type);
+
+ inline void BranchOnSmi(Register value, Label* smi_label) {
+ tst(value, Operand(kSmiTagMask));
+ b(eq, smi_label);
+ }
+
+ inline void BranchOnNotSmi(Register value, Label* not_smi_label) {
+ tst(value, Operand(kSmiTagMask));
+ b(ne, not_smi_label);
+ }
+
+ // Generates code for reporting that an illegal operation has
+ // occurred.
+ void IllegalOperation(int num_arguments);
+
+
+ // ---------------------------------------------------------------------------
+ // Runtime calls
+
+ // Call a code stub.
+ void CallStub(CodeStub* stub, Condition cond = al);
+ void CallJSExitStub(CodeStub* stub);
+
+ // Return from a code stub after popping its arguments.
+ void StubReturn(int argc);
+
+ // Call a runtime routine.
+ // Eventually this should be used for all C calls.
+ void CallRuntime(Runtime::Function* f, int num_arguments);
+
+ // Convenience function: Same as above, but takes the fid instead.
+ void CallRuntime(Runtime::FunctionId fid, int num_arguments);
+
+ // Tail call of a runtime routine (jump).
+ // Like JumpToRuntime, but also takes care of passing the number
+ // of parameters.
+ void TailCallRuntime(const ExternalReference& ext,
+ int num_arguments,
+ int result_size);
+
+ // Jump to a runtime routine.
+ void JumpToRuntime(const ExternalReference& builtin);
+
+ // Invoke specified builtin JavaScript function. Adds an entry to
+ // the unresolved list if the name does not resolve.
+ void InvokeBuiltin(Builtins::JavaScript id, InvokeJSFlags flags);
+
+ // Store the code object for the given builtin in the target register and
+ // setup the function in r1.
+ void GetBuiltinEntry(Register target, Builtins::JavaScript id);
+
+ struct Unresolved {
+ int pc;
+ uint32_t flags; // see Bootstrapper::FixupFlags decoders/encoders.
+ const char* name;
+ };
+ List<Unresolved>* unresolved() { return &unresolved_; }
+
+ Handle<Object> CodeObject() { return code_object_; }
+
+
+ // ---------------------------------------------------------------------------
+ // StatsCounter support
+
+ void SetCounter(StatsCounter* counter, int value,
+ Register scratch1, Register scratch2);
+ void IncrementCounter(StatsCounter* counter, int value,
+ Register scratch1, Register scratch2);
+ void DecrementCounter(StatsCounter* counter, int value,
+ Register scratch1, Register scratch2);
+
+
+ // ---------------------------------------------------------------------------
+ // Debugging
+
+ // Calls Abort(msg) if the condition cc is not satisfied.
+ // Use --debug_code to enable.
+ void Assert(Condition cc, const char* msg);
+
+ // Like Assert(), but always enabled.
+ void Check(Condition cc, const char* msg);
+
+ // Print a message to stdout and abort execution.
+ void Abort(const char* msg);
+
+ // Verify restrictions about code generated in stubs.
+ void set_generating_stub(bool value) { generating_stub_ = value; }
+ bool generating_stub() { return generating_stub_; }
+ void set_allow_stub_calls(bool value) { allow_stub_calls_ = value; }
+ bool allow_stub_calls() { return allow_stub_calls_; }
+
+ private:
+ List<Unresolved> unresolved_;
+ bool generating_stub_;
+ bool allow_stub_calls_;
+ Handle<Object> code_object_; // This handle will be patched with the code
+ // object on installation.
+
+ // Helper functions for generating invokes.
+ void InvokePrologue(const ParameterCount& expected,
+ const ParameterCount& actual,
+ Handle<Code> code_constant,
+ Register code_reg,
+ Label* done,
+ InvokeFlag flag);
+
+ // Prepares for a call or jump to a builtin by doing two things:
+ // 1. Emits code that fetches the builtin's function object from the context
+ // at runtime, and puts it in the register rdi.
+ // 2. Fetches the builtin's code object, and returns it in a handle, at
+ // compile time, so that later code can emit instructions to jump or call
+ // the builtin directly. If the code object has not yet been created, it
+ // returns the builtin code object for IllegalFunction, and sets the
+ // output parameter "resolved" to false. Code that uses the return value
+ // should then add the address and the builtin name to the list of fixups
+ // called unresolved_, which is fixed up by the bootstrapper.
+ Handle<Code> ResolveBuiltin(Builtins::JavaScript id, bool* resolved);
+
+ // Activation support.
+ void EnterFrame(StackFrame::Type type);
+ void LeaveFrame(StackFrame::Type type);
+};
+
+
+#ifdef ENABLE_DEBUGGER_SUPPORT
+// The code patcher is used to patch (typically) small parts of code e.g. for
+// debugging and other types of instrumentation. When using the code patcher
+// the exact number of bytes specified must be emitted. It is not legal to emit
+// relocation information. If any of these constraints are violated it causes
+// an assertion to fail.
+class CodePatcher {
+ public:
+ CodePatcher(byte* address, int instructions);
+ virtual ~CodePatcher();
+
+ // Macro assembler to emit code.
+ MacroAssembler* masm() { return &masm_; }
+
+ // Emit an instruction directly.
+ void Emit(Instr x);
+
+ // Emit an address directly.
+ void Emit(Address addr);
+
+ private:
+ byte* address_; // The address of the code being patched.
+ int instructions_; // Number of instructions of the expected patch size.
+ int size_; // Number of bytes of the expected patch size.
+ MacroAssembler masm_; // Macro assembler used to generate the code.
+};
+#endif // ENABLE_DEBUGGER_SUPPORT
+
+
+// -----------------------------------------------------------------------------
+// Static helper functions.
+
+// Generate a MemOperand for loading a field from an object.
+static inline MemOperand FieldMemOperand(Register object, int offset) {
+ return MemOperand(object, offset - kHeapObjectTag);
+}
+
+
+#ifdef GENERATED_CODE_COVERAGE
+#define CODE_COVERAGE_STRINGIFY(x) #x
+#define CODE_COVERAGE_TOSTRING(x) CODE_COVERAGE_STRINGIFY(x)
+#define __FILE_LINE__ __FILE__ ":" CODE_COVERAGE_TOSTRING(__LINE__)
+#define ACCESS_MASM(masm) masm->stop(__FILE_LINE__); masm->
+#else
+#define ACCESS_MASM(masm) masm->
+#endif
+
+
+} } // namespace v8::internal
+
+#endif // V8_ARM_MACRO_ASSEMBLER_ARM_H_