Add new Float32x4 type for SIMD.js.

src/objects-inl.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 // Review notes:
 //
 // - The use of macros in these inline functions may seem superfluous
 // but it is absolutely needed to make sure gcc generates optimal
 // code. gcc is not happy when attempting to inline too deep.
 //
@@ skipping 152 matching lines @@
 }
 
 
 bool Object::IsHeapObject() const {
   return Internals::HasHeapObjectTag(this);
 }
 
 
 TYPE_CHECKER(HeapNumber, HEAP_NUMBER_TYPE)
 TYPE_CHECKER(MutableHeapNumber, MUTABLE_HEAP_NUMBER_TYPE)
+TYPE_CHECKER(Float32x4, FLOAT32X4_TYPE)
 TYPE_CHECKER(Symbol, SYMBOL_TYPE)
 
 
 bool Object::IsString() const {
   return Object::IsHeapObject()
     && HeapObject::cast(this)->map()->instance_type() < FIRST_NONSTRING_TYPE;
 }
 
 
 bool Object::IsName() const {
@@ skipping 1130 matching lines @@
 
 #define WRITE_UINT32_FIELD(p, offset, value) \
   (*reinterpret_cast<uint32_t*>(FIELD_ADDR(p, offset)) = value)
 
 #define READ_INT32_FIELD(p, offset) \
   (*reinterpret_cast<const int32_t*>(FIELD_ADDR_CONST(p, offset)))
 
 #define WRITE_INT32_FIELD(p, offset, value) \
   (*reinterpret_cast<int32_t*>(FIELD_ADDR(p, offset)) = value)
 
+#define READ_FLOAT_FIELD(p, offset) \
+  (*reinterpret_cast<const float*>(FIELD_ADDR_CONST(p, offset)))
+
+#define WRITE_FLOAT_FIELD(p, offset, value) \
+  (*reinterpret_cast<float*>(FIELD_ADDR(p, offset)) = value)
+
 #define READ_UINT64_FIELD(p, offset) \
   (*reinterpret_cast<const uint64_t*>(FIELD_ADDR_CONST(p, offset)))
 
 #define WRITE_UINT64_FIELD(p, offset, value) \
   (*reinterpret_cast<uint64_t*>(FIELD_ADDR(p, offset)) = value)
 
 #define READ_INT64_FIELD(p, offset) \
   (*reinterpret_cast<const int64_t*>(FIELD_ADDR_CONST(p, offset)))
 
 #define WRITE_INT64_FIELD(p, offset, value) \
@@ skipping 236 matching lines @@
   return ((READ_INT_FIELD(this, kExponentOffset) & kExponentMask) >>
           kExponentShift) - kExponentBias;
 }
 
 
 int HeapNumber::get_sign() {
   return READ_INT_FIELD(this, kExponentOffset) & kSignMask;
 }
 
 
+double Float32x4::get_lane(int lane) const {
+  DCHECK(lane < 4 && lane >= 0);

[titzer, 2015/06/03 13:27:15]

Looks like we are only supporting little endian for now. I suppose that's OK.

[bbudge, 2015/06/03 20:31:48]

I guess there aren't any big-endian media instruction sets? However, it's easy
enough to support here. Done.

+  return READ_FLOAT_FIELD(this, kValueOffset + lane * 4);
+}
+
+
+void Float32x4::set_lane(int lane, double value) {
+  DCHECK(lane < 4 && lane >= 0);
+  WRITE_FLOAT_FIELD(this, kValueOffset + lane * 4, DoubleToFloat32(value));
+}
+
+
 ACCESSORS(JSObject, properties, FixedArray, kPropertiesOffset)
 
 
 Object** FixedArray::GetFirstElementAddress() {
   return reinterpret_cast<Object**>(FIELD_ADDR(this, OffsetOfElementAt(0)));
 }
 
 
 bool FixedArray::ContainsOnlySmisOrHoles() {
   Object* the_hole = GetHeap()->the_hole_value();
@@ skipping 837 matching lines @@
 }
 
 
 AllocationAlignment HeapObject::RequiredAlignment() {
 #ifdef V8_HOST_ARCH_32_BIT
   if ((IsFixedFloat64Array() || IsFixedDoubleArray()) &&
       FixedArrayBase::cast(this)->length() != 0) {
     return kDoubleAligned;
   }
   if (IsHeapNumber()) return kDoubleUnaligned;
+  if (IsFloat32x4()) return kSimd128Unaligned;
 #endif  // V8_HOST_ARCH_32_BIT
   return kWordAligned;
 }
 
 
 void FixedArray::set(int index,
                      Object* value,
                      WriteBarrierMode mode) {
   DCHECK(map() != GetHeap()->fixed_cow_array_map());
   DCHECK(index >= 0 && index < this->length());
@@ skipping 520 matching lines @@
 CAST_ACCESSOR(ExternalString)
 CAST_ACCESSOR(ExternalTwoByteString)
 CAST_ACCESSOR(ExternalUint16Array)
 CAST_ACCESSOR(ExternalUint32Array)
 CAST_ACCESSOR(ExternalUint8Array)
 CAST_ACCESSOR(ExternalUint8ClampedArray)
 CAST_ACCESSOR(FixedArray)
 CAST_ACCESSOR(FixedArrayBase)
 CAST_ACCESSOR(FixedDoubleArray)
 CAST_ACCESSOR(FixedTypedArrayBase)
+CAST_ACCESSOR(Float32x4)
 CAST_ACCESSOR(Foreign)
 CAST_ACCESSOR(GlobalDictionary)
 CAST_ACCESSOR(GlobalObject)
 CAST_ACCESSOR(HandlerTable)
 CAST_ACCESSOR(HeapObject)
 CAST_ACCESSOR(JSArray)
 CAST_ACCESSOR(JSArrayBuffer)
 CAST_ACCESSOR(JSArrayBufferView)
 CAST_ACCESSOR(JSBuiltinsObject)
 CAST_ACCESSOR(JSDataView)
@@ skipping 4340 matching lines @@
 #undef READ_SHORT_FIELD
 #undef WRITE_SHORT_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 #undef NOBARRIER_READ_BYTE_FIELD
 #undef NOBARRIER_WRITE_BYTE_FIELD
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_INL_H_