Revert 13117: "Enable stub generation using Hydrogen/Lithium (again)"

src/ia32/stub-cache-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 3380 matching lines @@
 
 Handle<Code> KeyedLoadStubCompiler::CompileLoadElement(
     Handle<Map> receiver_map) {
   // ----------- S t a t e -------------
   //  -- ecx    : key
   //  -- edx    : receiver
   //  -- esp[0] : return address
   // -----------------------------------
 
   ElementsKind elements_kind = receiver_map->elements_kind();
-  if (receiver_map->has_fast_elements() ||
-      receiver_map->has_external_array_elements()) {
-    Handle<Code> stub = KeyedLoadFastElementStub(
-        receiver_map->instance_type() == JS_ARRAY_TYPE,
-        elements_kind).GetCode();
-    __ DispatchMap(edx, receiver_map, stub, DO_SMI_CHECK);
-  } else {
-    Handle<Code> stub =
-        KeyedLoadDictionaryElementStub().GetCode();
-    __ DispatchMap(edx, receiver_map, stub, DO_SMI_CHECK);
-  }
+  Handle<Code> stub = KeyedLoadElementStub(elements_kind).GetCode();
+
+  __ DispatchMap(edx, receiver_map, stub, DO_SMI_CHECK);
 
   GenerateLoadMiss(masm(), Code::KEYED_LOAD_IC);
 
   // Return the generated code.
   return GetCode(Code::NORMAL, factory()->empty_string());
 }
 
 
 Handle<Code> KeyedLoadStubCompiler::CompileLoadPolymorphic(
     MapHandleList* receiver_maps,
@@ skipping 240 matching lines @@
     __ j(sign, fail);
     __ SmiTag(scratch);
     __ mov(key, scratch);
     __ bind(&key_ok);
   } else {
     __ JumpIfNotSmi(key, fail);
   }
 }
 
 
+void KeyedLoadStubCompiler::GenerateLoadExternalArray(
+    MacroAssembler* masm,
+    ElementsKind elements_kind) {
+  // ----------- S t a t e -------------
+  //  -- ecx    : key
+  //  -- edx    : receiver
+  //  -- esp[0] : return address
+  // -----------------------------------
+  Label miss_force_generic, failed_allocation, slow;
+
+  // This stub is meant to be tail-jumped to, the receiver must already
+  // have been verified by the caller to not be a smi.
+
+  // Check that the key is a smi or a heap number convertible to a smi.
+  GenerateSmiKeyCheck(masm, ecx, eax, xmm0, xmm1, &miss_force_generic);
+
+  // Check that the index is in range.
+  __ mov(ebx, FieldOperand(edx, JSObject::kElementsOffset));
+  __ cmp(ecx, FieldOperand(ebx, ExternalArray::kLengthOffset));
+  // Unsigned comparison catches both negative and too-large values.
+  __ j(above_equal, &miss_force_generic);
+  __ mov(ebx, FieldOperand(ebx, ExternalArray::kExternalPointerOffset));
+  // ebx: base pointer of external storage
+  switch (elements_kind) {
+    case EXTERNAL_BYTE_ELEMENTS:
+      __ SmiUntag(ecx);  // Untag the index.
+      __ movsx_b(eax, Operand(ebx, ecx, times_1, 0));
+      break;
+    case EXTERNAL_UNSIGNED_BYTE_ELEMENTS:
+    case EXTERNAL_PIXEL_ELEMENTS:
+      __ SmiUntag(ecx);  // Untag the index.
+      __ movzx_b(eax, Operand(ebx, ecx, times_1, 0));
+      break;
+    case EXTERNAL_SHORT_ELEMENTS:
+      __ movsx_w(eax, Operand(ebx, ecx, times_1, 0));
+      break;
+    case EXTERNAL_UNSIGNED_SHORT_ELEMENTS:
+      __ movzx_w(eax, Operand(ebx, ecx, times_1, 0));
+      break;
+    case EXTERNAL_UNSIGNED_INT_ELEMENTS:
+    case EXTERNAL_INT_ELEMENTS:
+      __ mov(eax, Operand(ebx, ecx, times_2, 0));
+      break;
+    case EXTERNAL_FLOAT_ELEMENTS:
+      __ fld_s(Operand(ebx, ecx, times_2, 0));
+      break;
+    case EXTERNAL_DOUBLE_ELEMENTS:
+      __ fld_d(Operand(ebx, ecx, times_4, 0));
+      break;
+    default:
+      UNREACHABLE();
+      break;
+  }
+
+  // For integer array types:
+  // eax: value
+  // For floating-point array type:
+  // FP(0): value
+
+  if (elements_kind == EXTERNAL_INT_ELEMENTS ||
+      elements_kind == EXTERNAL_UNSIGNED_INT_ELEMENTS) {
+    // For the Int and UnsignedInt array types, we need to see whether
+    // the value can be represented in a Smi. If not, we need to convert
+    // it to a HeapNumber.
+    Label box_int;
+    if (elements_kind == EXTERNAL_INT_ELEMENTS) {
+      __ cmp(eax, 0xc0000000);
+      __ j(sign, &box_int);
+    } else {
+      ASSERT_EQ(EXTERNAL_UNSIGNED_INT_ELEMENTS, elements_kind);
+      // The test is different for unsigned int values. Since we need
+      // the value to be in the range of a positive smi, we can't
+      // handle either of the top two bits being set in the value.
+      __ test(eax, Immediate(0xc0000000));
+      __ j(not_zero, &box_int);
+    }
+
+    __ SmiTag(eax);
+    __ ret(0);
+
+    __ bind(&box_int);
+
+    // Allocate a HeapNumber for the int and perform int-to-double
+    // conversion.
+    if (elements_kind == EXTERNAL_INT_ELEMENTS) {
+      __ push(eax);
+      __ fild_s(Operand(esp, 0));
+      __ pop(eax);
+    } else {
+      ASSERT_EQ(EXTERNAL_UNSIGNED_INT_ELEMENTS, elements_kind);
+      // Need to zero-extend the value.
+      // There's no fild variant for unsigned values, so zero-extend
+      // to a 64-bit int manually.
+      __ push(Immediate(0));
+      __ push(eax);
+      __ fild_d(Operand(esp, 0));
+      __ pop(eax);
+      __ pop(eax);
+    }
+    // FP(0): value
+    __ AllocateHeapNumber(eax, ebx, edi, &failed_allocation);
+    // Set the value.
+    __ fstp_d(FieldOperand(eax, HeapNumber::kValueOffset));
+    __ ret(0);
+  } else if (elements_kind == EXTERNAL_FLOAT_ELEMENTS ||
+             elements_kind == EXTERNAL_DOUBLE_ELEMENTS) {
+    // For the floating-point array type, we need to always allocate a
+    // HeapNumber.
+    __ AllocateHeapNumber(eax, ebx, edi, &failed_allocation);
+    // Set the value.
+    __ fstp_d(FieldOperand(eax, HeapNumber::kValueOffset));
+    __ ret(0);
+  } else {
+    __ SmiTag(eax);
+    __ ret(0);
+  }
+
+  // If we fail allocation of the HeapNumber, we still have a value on
+  // top of the FPU stack. Remove it.
+  __ bind(&failed_allocation);
+  __ fstp(0);
+  // Fall through to slow case.
+
+  // Slow case: Jump to runtime.
+  __ bind(&slow);
+  Counters* counters = masm->isolate()->counters();
+  __ IncrementCounter(counters->keyed_load_external_array_slow(), 1);
+
+  // ----------- S t a t e -------------
+  //  -- ecx    : key
+  //  -- edx    : receiver
+  //  -- esp[0] : return address
+  // -----------------------------------
+
+  Handle<Code> ic = masm->isolate()->builtins()->KeyedLoadIC_Slow();
+  __ jmp(ic, RelocInfo::CODE_TARGET);
+
+  // ----------- S t a t e -------------
+  //  -- ecx    : key
+  //  -- edx    : receiver
+  //  -- esp[0] : return address
+  // -----------------------------------
+
+  // Miss case: Jump to runtime.
+  __ bind(&miss_force_generic);
+  Handle<Code> miss_ic =
+      masm->isolate()->builtins()->KeyedLoadIC_MissForceGeneric();
+  __ jmp(miss_ic, RelocInfo::CODE_TARGET);
+}
+
+
 void KeyedStoreStubCompiler::GenerateStoreExternalArray(
     MacroAssembler* masm,
     ElementsKind elements_kind) {
   // ----------- S t a t e -------------
   //  -- eax    : value
   //  -- ecx    : key
   //  -- edx    : receiver
   //  -- esp[0] : return address
   // -----------------------------------
   Label miss_force_generic, slow, check_heap_number;
@@ skipping 179 matching lines @@
   //  -- esp[0] : return address
   // -----------------------------------
 
   __ bind(&miss_force_generic);
   Handle<Code> miss_ic =
       masm->isolate()->builtins()->KeyedStoreIC_MissForceGeneric();
   __ jmp(miss_ic, RelocInfo::CODE_TARGET);
 }
 
 
+void KeyedLoadStubCompiler::GenerateLoadFastElement(MacroAssembler* masm) {
+  // ----------- S t a t e -------------
+  //  -- ecx    : key
+  //  -- edx    : receiver
+  //  -- esp[0] : return address
+  // -----------------------------------
+  Label miss_force_generic;
+
+  // This stub is meant to be tail-jumped to, the receiver must already
+  // have been verified by the caller to not be a smi.
+
+  // Check that the key is a smi or a heap number convertible to a smi.
+  GenerateSmiKeyCheck(masm, ecx, eax, xmm0, xmm1, &miss_force_generic);
+
+  // Get the elements array.
+  __ mov(eax, FieldOperand(edx, JSObject::kElementsOffset));
+  __ AssertFastElements(eax);
+
+  // Check that the key is within bounds.
+  __ cmp(ecx, FieldOperand(eax, FixedArray::kLengthOffset));
+  __ j(above_equal, &miss_force_generic);
+
+  // Load the result and make sure it's not the hole.
+  __ mov(ebx, Operand(eax, ecx, times_2,
+                      FixedArray::kHeaderSize - kHeapObjectTag));
+  __ cmp(ebx, masm->isolate()->factory()->the_hole_value());
+  __ j(equal, &miss_force_generic);
+  __ mov(eax, ebx);
+  __ ret(0);
+
+  __ bind(&miss_force_generic);
+  Handle<Code> miss_ic =
+      masm->isolate()->builtins()->KeyedLoadIC_MissForceGeneric();
+  __ jmp(miss_ic, RelocInfo::CODE_TARGET);
+}
+
+
+void KeyedLoadStubCompiler::GenerateLoadFastDoubleElement(
+    MacroAssembler* masm) {
+  // ----------- S t a t e -------------
+  //  -- ecx    : key
+  //  -- edx    : receiver
+  //  -- esp[0] : return address
+  // -----------------------------------
+  Label miss_force_generic, slow_allocate_heapnumber;
+
+  // This stub is meant to be tail-jumped to, the receiver must already
+  // have been verified by the caller to not be a smi.
+
+  // Check that the key is a smi or a heap number convertible to a smi.
+  GenerateSmiKeyCheck(masm, ecx, eax, xmm0, xmm1, &miss_force_generic);
+
+  // Get the elements array.
+  __ mov(eax, FieldOperand(edx, JSObject::kElementsOffset));
+  __ AssertFastElements(eax);
+
+  // Check that the key is within bounds.
+  __ cmp(ecx, FieldOperand(eax, FixedDoubleArray::kLengthOffset));
+  __ j(above_equal, &miss_force_generic);
+
+  // Check for the hole
+  uint32_t offset = FixedDoubleArray::kHeaderSize + sizeof(kHoleNanLower32);
+  __ cmp(FieldOperand(eax, ecx, times_4, offset), Immediate(kHoleNanUpper32));
+  __ j(equal, &miss_force_generic);
+
+  // Always allocate a heap number for the result.
+  if (CpuFeatures::IsSupported(SSE2)) {
+    CpuFeatures::Scope use_sse2(SSE2);
+    __ movdbl(xmm0, FieldOperand(eax, ecx, times_4,
+                                 FixedDoubleArray::kHeaderSize));
+  } else {
+    __ fld_d(FieldOperand(eax, ecx, times_4, FixedDoubleArray::kHeaderSize));
+  }
+  __ AllocateHeapNumber(eax, ebx, edi, &slow_allocate_heapnumber);
+  // Set the value.
+  if (CpuFeatures::IsSupported(SSE2)) {
+    CpuFeatures::Scope use_sse2(SSE2);
+    __ movdbl(FieldOperand(eax, HeapNumber::kValueOffset), xmm0);
+  } else {
+    __ fstp_d(FieldOperand(eax, HeapNumber::kValueOffset));
+  }
+  __ ret(0);
+
+  __ bind(&slow_allocate_heapnumber);
+  // A value was pushed on the floating point stack before the allocation, if
+  // the allocation fails it needs to be removed.
+  if (!CpuFeatures::IsSupported(SSE2)) {
+    __ fstp(0);
+  }
+  Handle<Code> slow_ic =
+      masm->isolate()->builtins()->KeyedLoadIC_Slow();
+  __ jmp(slow_ic, RelocInfo::CODE_TARGET);
+
+  __ bind(&miss_force_generic);
+  Handle<Code> miss_ic =
+      masm->isolate()->builtins()->KeyedLoadIC_MissForceGeneric();
+  __ jmp(miss_ic, RelocInfo::CODE_TARGET);
+}
+
+
 void KeyedStoreStubCompiler::GenerateStoreFastElement(
     MacroAssembler* masm,
     bool is_js_array,
     ElementsKind elements_kind,
     KeyedAccessGrowMode grow_mode) {
   // ----------- S t a t e -------------
   //  -- eax    : value
   //  -- ecx    : key
   //  -- edx    : receiver
   //  -- esp[0] : return address
@@ skipping 279 matching lines @@
     __ jmp(ic_slow, RelocInfo::CODE_TARGET);
   }
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32