Revert r6376 and r6373 which changes external array support. The ARM...

src/ia32/stub-cache-ia32.cc

Index: src/ia32/stub-cache-ia32.cc
===================================================================
--- src/ia32/stub-cache-ia32.cc	(revision 6378)
+++ src/ia32/stub-cache-ia32.cc	(working copy)
@@ -3306,395 +3306,6 @@
 }
 
 
-MaybeObject* ExternalArrayStubCompiler::CompileKeyedLoadStub(
-    ExternalArrayType array_type, Code::Flags flags) {
-  // ----------- S t a t e -------------
-  //  -- eax    : key
-  //  -- edx    : receiver
-  //  -- esp[0] : return address
-  // -----------------------------------
-  Label slow, failed_allocation;
-
-  // Check that the object isn't a smi.
-  __ test(edx, Immediate(kSmiTagMask));
-  __ j(zero, &slow, not_taken);
-
-  // Check that the key is a smi.
-  __ test(eax, Immediate(kSmiTagMask));
-  __ j(not_zero, &slow, not_taken);
-
-  // Get the map of the receiver.
-  __ mov(ecx, FieldOperand(edx, HeapObject::kMapOffset));
-  // Check that the receiver does not require access checks.  We need
-  // to check this explicitly since this generic stub does not perform
-  // map checks.
-  __ test_b(FieldOperand(ecx, Map::kBitFieldOffset),
-            1 << Map::kIsAccessCheckNeeded);
-  __ j(not_zero, &slow, not_taken);
-
-  __ CmpInstanceType(ecx, JS_OBJECT_TYPE);
-  __ j(not_equal, &slow, not_taken);
-
-  // Check that the elements array is the appropriate type of
-  // ExternalArray.
-  __ mov(ebx, FieldOperand(edx, JSObject::kElementsOffset));
-  Handle<Map> map(Heap::MapForExternalArrayType(array_type));
-  __ cmp(FieldOperand(ebx, HeapObject::kMapOffset),
-         Immediate(map));
-  __ j(not_equal, &slow, not_taken);
-
-  // eax: key, known to be a smi.
-  // edx: receiver, known to be a JSObject.
-  // ebx: elements object, known to be an external array.
-  // Check that the index is in range.
-  __ mov(ecx, eax);
-  __ SmiUntag(ecx);  // Untag the index.
-  __ cmp(ecx, FieldOperand(ebx, ExternalArray::kLengthOffset));
-  // Unsigned comparison catches both negative and too-large values.
-  __ j(above_equal, &slow);
-
-  __ mov(ebx, FieldOperand(ebx, ExternalArray::kExternalPointerOffset));
-  // ebx: base pointer of external storage
-  switch (array_type) {
-    case kExternalByteArray:
-      __ movsx_b(ecx, Operand(ebx, ecx, times_1, 0));
-      break;
-    case kExternalUnsignedByteArray:
-      __ movzx_b(ecx, Operand(ebx, ecx, times_1, 0));
-      break;
-    case kExternalShortArray:
-      __ movsx_w(ecx, Operand(ebx, ecx, times_2, 0));
-      break;
-    case kExternalUnsignedShortArray:
-      __ movzx_w(ecx, Operand(ebx, ecx, times_2, 0));
-      break;
-    case kExternalIntArray:
-    case kExternalUnsignedIntArray:
-      __ mov(ecx, Operand(ebx, ecx, times_4, 0));
-      break;
-    case kExternalFloatArray:
-      __ fld_s(Operand(ebx, ecx, times_4, 0));
-      break;
-    default:
-      UNREACHABLE();
-      break;
-  }
-
-  // For integer array types:
-  // ecx: value
-  // For floating-point array type:
-  // FP(0): value
-
-  if (array_type == kExternalIntArray ||
-      array_type == kExternalUnsignedIntArray) {
-    // 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 (array_type == kExternalIntArray) {
-      __ cmp(ecx, 0xC0000000);
-      __ j(sign, &box_int);
-    } else {
-      ASSERT_EQ(array_type, kExternalUnsignedIntArray);
-      // 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(ecx, Immediate(0xC0000000));
-      __ j(not_zero, &box_int);
-    }
-
-    __ mov(eax, ecx);
-    __ SmiTag(eax);
-    __ ret(0);
-
-    __ bind(&box_int);
-
-    // Allocate a HeapNumber for the int and perform int-to-double
-    // conversion.
-    if (array_type == kExternalIntArray) {
-      __ push(ecx);
-      __ fild_s(Operand(esp, 0));
-      __ pop(ecx);
-    } else {
-      ASSERT(array_type == kExternalUnsignedIntArray);
-      // 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(ecx);
-      __ fild_d(Operand(esp, 0));
-      __ pop(ecx);
-      __ pop(ecx);
-    }
-    // FP(0): value
-    __ AllocateHeapNumber(ecx, ebx, edi, &failed_allocation);
-    // Set the value.
-    __ mov(eax, ecx);
-    __ fstp_d(FieldOperand(eax, HeapNumber::kValueOffset));
-    __ ret(0);
-  } else if (array_type == kExternalFloatArray) {
-    // For the floating-point array type, we need to always allocate a
-    // HeapNumber.
-    __ AllocateHeapNumber(ecx, ebx, edi, &failed_allocation);
-    // Set the value.
-    __ mov(eax, ecx);
-    __ fstp_d(FieldOperand(eax, HeapNumber::kValueOffset));
-    __ ret(0);
-  } else {
-    __ mov(eax, ecx);
-    __ 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);
-  __ ffree();
-  __ fincstp();
-  // Fall through to slow case.
-
-  // Slow case: Jump to runtime.
-  __ bind(&slow);
-  __ IncrementCounter(&Counters::keyed_load_external_array_slow, 1);
-  // ----------- S t a t e -------------
-  //  -- eax    : key
-  //  -- edx    : receiver
-  //  -- esp[0] : return address
-  // -----------------------------------
-
-  __ pop(ebx);
-  __ push(edx);  // receiver
-  __ push(eax);  // name
-  __ push(ebx);  // return address
-
-  // Perform tail call to the entry.
-  __ TailCallRuntime(Runtime::kKeyedGetProperty, 2, 1);
-
-  // Return the generated code.
-  return GetCode(flags);
-}
-
-
-MaybeObject* ExternalArrayStubCompiler::CompileKeyedStoreStub(
-    ExternalArrayType array_type, Code::Flags flags) {
-  // ----------- S t a t e -------------
-  //  -- eax    : value
-  //  -- ecx    : key
-  //  -- edx    : receiver
-  //  -- esp[0] : return address
-  // -----------------------------------
-  Label slow, check_heap_number;
-
-  // Check that the object isn't a smi.
-  __ test(edx, Immediate(kSmiTagMask));
-  __ j(zero, &slow);
-  // Get the map from the receiver.
-  __ mov(edi, FieldOperand(edx, HeapObject::kMapOffset));
-  // Check that the receiver does not require access checks.  We need
-  // to do this because this generic stub does not perform map checks.
-  __ test_b(FieldOperand(edi, Map::kBitFieldOffset),
-            1 << Map::kIsAccessCheckNeeded);
-  __ j(not_zero, &slow);
-  // Check that the key is a smi.
-  __ test(ecx, Immediate(kSmiTagMask));
-  __ j(not_zero, &slow);
-  // Get the instance type from the map of the receiver.
-  __ CmpInstanceType(edi, JS_OBJECT_TYPE);
-  __ j(not_equal, &slow);
-
-  // Check that the elements array is the appropriate type of
-  // ExternalArray.
-  // eax: value
-  // edx: receiver, a JSObject
-  // ecx: key, a smi
-  __ mov(edi, FieldOperand(edx, JSObject::kElementsOffset));
-  __ CheckMap(edi, Handle<Map>(Heap::MapForExternalArrayType(array_type)),
-              &slow, true);
-
-  // Check that the index is in range.
-  __ mov(ebx, ecx);
-  __ SmiUntag(ebx);
-  __ cmp(ebx, FieldOperand(edi, ExternalArray::kLengthOffset));
-  // Unsigned comparison catches both negative and too-large values.
-  __ j(above_equal, &slow);
-
-  // Handle both smis and HeapNumbers in the fast path. Go to the
-  // runtime for all other kinds of values.
-  // eax: value
-  // edx: receiver
-  // ecx: key
-  // edi: elements array
-  // ebx: untagged index
-  __ test(eax, Immediate(kSmiTagMask));
-  __ j(not_equal, &check_heap_number);
-  // smi case
-  __ mov(ecx, eax);  // Preserve the value in eax.  Key is no longer needed.
-  __ SmiUntag(ecx);
-  __ mov(edi, FieldOperand(edi, ExternalArray::kExternalPointerOffset));
-  // ecx: base pointer of external storage
-  switch (array_type) {
-    case kExternalByteArray:
-    case kExternalUnsignedByteArray:
-      __ mov_b(Operand(edi, ebx, times_1, 0), ecx);
-      break;
-    case kExternalShortArray:
-    case kExternalUnsignedShortArray:
-      __ mov_w(Operand(edi, ebx, times_2, 0), ecx);
-      break;
-    case kExternalIntArray:
-    case kExternalUnsignedIntArray:
-      __ mov(Operand(edi, ebx, times_4, 0), ecx);
-      break;
-    case kExternalFloatArray:
-      // Need to perform int-to-float conversion.
-      __ push(ecx);
-      __ fild_s(Operand(esp, 0));
-      __ pop(ecx);
-      __ fstp_s(Operand(edi, ebx, times_4, 0));
-      break;
-    default:
-      UNREACHABLE();
-      break;
-  }
-  __ ret(0);  // Return the original value.
-
-  __ bind(&check_heap_number);
-  // eax: value
-  // edx: receiver
-  // ecx: key
-  // edi: elements array
-  // ebx: untagged index
-  __ cmp(FieldOperand(eax, HeapObject::kMapOffset),
-         Immediate(Factory::heap_number_map()));
-  __ j(not_equal, &slow);
-
-  // The WebGL specification leaves the behavior of storing NaN and
-  // +/-Infinity into integer arrays basically undefined. For more
-  // reproducible behavior, convert these to zero.
-  __ fld_d(FieldOperand(eax, HeapNumber::kValueOffset));
-  __ mov(edi, FieldOperand(edi, ExternalArray::kExternalPointerOffset));
-  // ebx: untagged index
-  // edi: base pointer of external storage
-  // top of FPU stack: value
-  if (array_type == kExternalFloatArray) {
-    __ fstp_s(Operand(edi, ebx, times_4, 0));
-    __ ret(0);
-  } else {
-    // Perform float-to-int conversion with truncation (round-to-zero)
-    // behavior.
-    if (array_type != kExternalIntArray &&
-        array_type != kExternalUnsignedIntArray) {
-      if (CpuFeatures::IsSupported(SSE3)) {
-        CpuFeatures::Scope scope(SSE3);
-        __ push(ecx);  // Make room on stack
-        __ fisttp_s(Operand(esp, 0));
-        __ pop(ecx);
-      } else if (CpuFeatures::IsSupported(SSE2)) {
-        CpuFeatures::Scope scope(SSE2);
-        // Free the top of the FP stack, which we don't use in this code
-        // path.
-        __ ffree();
-        __ fincstp();
-
-        __ cvttsd2si(ecx, FieldOperand(eax, HeapNumber::kValueOffset));
-      } else {
-        // TODO(kbr): consider supporting non-SSE2 processors properly.
-        // The code in IntegerConvert (code-stubs-ia32.cc) is roughly what
-        // is needed though the conversion failure case does not need to be
-        // handled. The code below is not correct; it doesn't truncate, it
-        // rounds.
-        __ push(ecx);  // Make room on stack
-        __ fistp_s(Operand(esp, 0));
-        __ pop(ecx);
-      }
-    } else {
-      bool have_sse3 = CpuFeatures::IsSupported(SSE3);
-      if (have_sse3 || !CpuFeatures::IsSupported(SSE2)) {
-          // fisttp stores values as signed integers. To represent the
-          // entire range of unsigned int arrays, store as a 64-bit
-          // int and discard the high 32 bits.
-          // If the value is NaN or +/-infinity, the result is 0x80000000,
-          // which is automatically zero when taken mod 2^n, n < 32.
-        __ sub(Operand(esp), Immediate(2 * kPointerSize));
-        if (have_sse3) {
-          CpuFeatures::Scope scope(SSE3);
-          __ fisttp_d(Operand(esp, 0));
-        } else {
-          // TODO(kbr): consider supporting non-SSE2 processors properly.
-          __ fistp_d(Operand(esp, 0));
-        }
-        __ pop(ecx);
-        __ add(Operand(esp), Immediate(kPointerSize));
-      } else {
-        ASSERT(CpuFeatures::IsSupported(SSE2));
-        CpuFeatures::Scope scope(SSE2);
-        // We can easily implement the correct rounding behavior for the
-        // range [0, 2^31-1]. For the time being, to keep this code simple,
-        // use the wrong rounding behavior for values outside this range.
-        __ movd(xmm0, FieldOperand(eax, HeapNumber::kValueOffset));
-        __ LoadPowerOf2(xmm1, ecx, 31);
-        Label is_outside_range;
-        Label continuation_point;
-        __ ucomisd(xmm0, xmm1);
-        __ j(above_equal, &is_outside_range);
-        // Free the top of the FP stack, which we don't use in this code
-        // path.
-        __ ffree();
-        __ fincstp();
-        __ cvttsd2si(ecx, FieldOperand(eax, HeapNumber::kValueOffset));
-        __ jmp(&continuation_point);
-        __ bind(&is_outside_range);
-        __ sub(Operand(esp), Immediate(2 * kPointerSize));
-        __ fistp_d(Operand(esp, 0));
-        __ pop(ecx);
-        __ add(Operand(esp), Immediate(kPointerSize));
-        __ bind(&continuation_point);
-      }
-    }
-    // ecx: untagged integer value
-    switch (array_type) {
-      case kExternalByteArray:
-      case kExternalUnsignedByteArray:
-        __ mov_b(Operand(edi, ebx, times_1, 0), ecx);
-        break;
-      case kExternalShortArray:
-      case kExternalUnsignedShortArray:
-        __ mov_w(Operand(edi, ebx, times_2, 0), ecx);
-        break;
-      case kExternalIntArray:
-      case kExternalUnsignedIntArray: {
-        __ mov(Operand(edi, ebx, times_4, 0), ecx);
-        break;
-      }
-      default:
-        UNREACHABLE();
-        break;
-    }
-    __ ret(0);  // Return original value.
-  }
-
-  // Slow case: call runtime.
-  __ bind(&slow);
-  // ----------- S t a t e -------------
-  //  -- eax    : value
-  //  -- ecx    : key
-  //  -- edx    : receiver
-  //  -- esp[0] : return address
-  // -----------------------------------
-
-  __ pop(ebx);
-  __ push(edx);
-  __ push(ecx);
-  __ push(eax);
-  __ push(ebx);
-
-  // Do tail-call to runtime routine.
-  __ TailCallRuntime(Runtime::kSetProperty, 3, 1);
-
-  return GetCode(flags);
-}
-
-
 #undef __
 
 } }  // namespace v8::internal