Merge bleeding_edge r17376:17693.

src/ia32/macro-assembler-ia32.cc

 // Copyright 2012 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
@@ skipping 15 matching lines @@
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #include "v8.h"
 
 #if V8_TARGET_ARCH_IA32
 
 #include "bootstrapper.h"
 #include "codegen.h"
 #include "cpu-profiler.h"
 #include "debug.h"
+#include "isolate-inl.h"
 #include "runtime.h"
 #include "serialize.h"
 
 namespace v8 {
 namespace internal {
 
 // -------------------------------------------------------------------------
 // MacroAssembler implementation.
 
 MacroAssembler::MacroAssembler(Isolate* arg_isolate, void* buffer, int size)
     : Assembler(arg_isolate, buffer, size),
       generating_stub_(false),
       allow_stub_calls_(true),
       has_frame_(false) {
   if (isolate() != NULL) {
     // TODO(titzer): should we just use a null handle here instead?
     code_object_ = Handle<Object>(isolate()->heap()->undefined_value(),
                                   isolate());
   }
 }
 
 
+void MacroAssembler::Load(Register dst, const Operand& src, Representation r) {
+  ASSERT(!r.IsDouble());
+  if (r.IsInteger8()) {
+    movsx_b(dst, src);
+  } else if (r.IsUInteger8()) {
+    movzx_b(dst, src);
+  } else if (r.IsInteger16()) {
+    movsx_w(dst, src);
+  } else if (r.IsUInteger16()) {
+    movzx_w(dst, src);
+  } else {
+    mov(dst, src);
+  }
+}
+
+
+void MacroAssembler::Store(Register src, const Operand& dst, Representation r) {
+  ASSERT(!r.IsDouble());
+  if (r.IsInteger8() || r.IsUInteger8()) {
+    mov_b(dst, src);
+  } else if (r.IsInteger16() || r.IsUInteger16()) {
+    mov_w(dst, src);
+  } else {
+    mov(dst, src);
+  }
+}
+
+
 void MacroAssembler::LoadRoot(Register destination, Heap::RootListIndex index) {
   if (isolate()->heap()->RootCanBeTreatedAsConstant(index)) {
     Handle<Object> value(&isolate()->heap()->roots_array_start()[index]);
     mov(destination, value);
     return;
   }
   ExternalReference roots_array_start =
       ExternalReference::roots_array_start(isolate());
   mov(destination, Immediate(index));
   mov(destination, Operand::StaticArray(destination,
@@ skipping 791 matching lines @@
     push(scratch1);
     fild_s(Operand(esp, 0));
     pop(scratch1);
     fstp_d(FieldOperand(elements, key, times_4,
                         FixedDoubleArray::kHeaderSize - elements_offset));
   }
   bind(&done);
 }
 
 
-void MacroAssembler::CompareMap(Register obj,
-                                Handle<Map> map,
-                                Label* early_success) {
+void MacroAssembler::CompareMap(Register obj, Handle<Map> map) {
   cmp(FieldOperand(obj, HeapObject::kMapOffset), map);
 }
 
 
 void MacroAssembler::CheckMap(Register obj,
                               Handle<Map> map,
                               Label* fail,
                               SmiCheckType smi_check_type) {
   if (smi_check_type == DO_SMI_CHECK) {
     JumpIfSmi(obj, fail);
   }
 
-  Label success;
-  CompareMap(obj, map, &success);
+  CompareMap(obj, map);
   j(not_equal, fail);
-  bind(&success);
 }
 
 
 void MacroAssembler::DispatchMap(Register obj,
                                  Register unused,
                                  Handle<Map> map,
                                  Handle<Code> success,
                                  SmiCheckType smi_check_type) {
   Label fail;
   if (smi_check_type == DO_SMI_CHECK) {
@@ skipping 117 matching lines @@
 
 void MacroAssembler::Prologue(PrologueFrameMode frame_mode) {
   if (frame_mode == BUILD_STUB_FRAME) {
     push(ebp);  // Caller's frame pointer.
     mov(ebp, esp);
     push(esi);  // Callee's context.
     push(Immediate(Smi::FromInt(StackFrame::STUB)));
   } else {
     PredictableCodeSizeScope predictible_code_size_scope(this,
         kNoCodeAgeSequenceLength);
-    if (FLAG_optimize_for_size && FLAG_age_code) {
+    if (isolate()->IsCodePreAgingActive()) {
         // Pre-age the code.
       call(isolate()->builtins()->MarkCodeAsExecutedOnce(),
           RelocInfo::CODE_AGE_SEQUENCE);
       Nop(kNoCodeAgeSequenceLength - Assembler::kCallInstructionLength);
     } else {
       push(ebp);  // Caller's frame pointer.
       mov(ebp, esp);
       push(esi);  // Callee's context.
       push(edi);  // Callee's JS function.
     }
@@ skipping 942 matching lines @@
 // Source and destination are incremented by length.
 // Many variants of movsb, loop unrolling, word moves, and indexed operands
 // have been tried here already, and this is fastest.
 // A simpler loop is faster on small copies, but 30% slower on large ones.
 // The cld() instruction must have been emitted, to set the direction flag(),
 // before calling this function.
 void MacroAssembler::CopyBytes(Register source,
                                Register destination,
                                Register length,
                                Register scratch) {
-  Label loop, done, short_string, short_loop;
-  // Experimentation shows that the short string loop is faster if length < 10.
-  cmp(length, Immediate(10));
-  j(less_equal, &short_string);
-
+  Label short_loop, len4, len8, len12, done, short_string;
   ASSERT(source.is(esi));
   ASSERT(destination.is(edi));
   ASSERT(length.is(ecx));
+  cmp(length, Immediate(4));
+  j(below, &short_string, Label::kNear);
 
   // Because source is 4-byte aligned in our uses of this function,
   // we keep source aligned for the rep_movs call by copying the odd bytes
   // at the end of the ranges.
   mov(scratch, Operand(source, length, times_1, -4));
   mov(Operand(destination, length, times_1, -4), scratch);
+
+  cmp(length, Immediate(8));
+  j(below_equal, &len4, Label::kNear);
+  cmp(length, Immediate(12));
+  j(below_equal, &len8, Label::kNear);
+  cmp(length, Immediate(16));
+  j(below_equal, &len12, Label::kNear);
+
   mov(scratch, ecx);
   shr(ecx, 2);
   rep_movs();
   and_(scratch, Immediate(0x3));
   add(destination, scratch);
-  jmp(&done);
+  jmp(&done, Label::kNear);
+
+  bind(&len12);
+  mov(scratch, Operand(source, 8));
+  mov(Operand(destination, 8), scratch);
+  bind(&len8);
+  mov(scratch, Operand(source, 4));
+  mov(Operand(destination, 4), scratch);
+  bind(&len4);
+  mov(scratch, Operand(source, 0));
+  mov(Operand(destination, 0), scratch);
+  add(destination, length);
+  jmp(&done, Label::kNear);
 
   bind(&short_string);
   test(length, length);
-  j(zero, &done);
+  j(zero, &done, Label::kNear);
 
   bind(&short_loop);
   mov_b(scratch, Operand(source, 0));
   mov_b(Operand(destination, 0), scratch);
   inc(source);
   inc(destination);
   dec(length);
   j(not_zero, &short_loop);
 
   bind(&done);
@@ skipping 1521 matching lines @@
       JSArray::kSize + AllocationMemento::kSize - kHeapObjectTag));
   cmp(scratch_reg, Immediate(new_space_start));
   j(less, no_memento_found);
   cmp(scratch_reg, Operand::StaticVariable(new_space_allocation_top));
   j(greater, no_memento_found);
   cmp(MemOperand(scratch_reg, -AllocationMemento::kSize),
       Immediate(isolate()->factory()->allocation_memento_map()));
 }
 
 
+void MacroAssembler::JumpIfDictionaryInPrototypeChain(
+    Register object,
+    Register scratch0,
+    Register scratch1,
+    Label* found) {
+  ASSERT(!scratch1.is(scratch0));
+  Factory* factory = isolate()->factory();
+  Register current = scratch0;
+  Label loop_again;
+
+  // scratch contained elements pointer.
+  mov(current, object);
+
+  // Loop based on the map going up the prototype chain.
+  bind(&loop_again);
+  mov(current, FieldOperand(current, HeapObject::kMapOffset));
+  mov(scratch1, FieldOperand(current, Map::kBitField2Offset));
+  and_(scratch1, Map::kElementsKindMask);
+  shr(scratch1, Map::kElementsKindShift);
+  cmp(scratch1, Immediate(DICTIONARY_ELEMENTS));
+  j(equal, found);
+  mov(current, FieldOperand(current, Map::kPrototypeOffset));
+  cmp(current, Immediate(factory->null_value()));
+  j(not_equal, &loop_again);
+}
+
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32