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// Copyright (c) 2020, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
#ifndef RUNTIME_VM_CONSTANTS_BASE_H_
#define RUNTIME_VM_CONSTANTS_BASE_H_
namespace dart {
// Alignment strategies for how to align values.
enum AlignmentStrategy {
// Align to the size of the value.
kAlignedToValueSize,
// Align to the size of the value, but align 8 byte-sized values to 4 bytes.
// Both double and int64.
kAlignedToValueSizeBut8AlignedTo4,
// Align to the architecture size.
kAlignedToWordSize,
// Align to the greater of architecture size or value size.
kAlignedToWordSizeAndValueSize,
};
// Minimum size strategies for how to store values.
enum ExtensionStrategy {
// Values can have arbitrary small size with the upper bits undefined.
kNotExtended,
// Values smaller than 4 bytes are passed around zero- or sign-extended to
// 4 bytes.
kExtendedTo4,
// Values smaller than 8 bytes are passed around zero- or sign-extended to
// 8 bytes.
kExtendedTo8,
};
} // namespace dart
#endif // RUNTIME_VM_CONSTANTS_BASE_H_