Vyacheslav Egorov
beb7114861
This relands commit b0a71d364c
Cq-Include-Trybots: dart/try:vm-kernel-precomp-linux-release-simarm64-try,vm-kernel-precomp-linux-release-simarm-try,vm-kernel-linux-release-simarm64-try,vm-kernel-linux-release-simarm-try,vm-kernel-precomp-linux-release-x64-try
Change-Id: I1d32e5d0d44f4e422d188643b548ed81859f7d74
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/143807
Commit-Queue: Vyacheslav Egorov <vegorov@google.com>
Reviewed-by: Vyacheslav Egorov <vegorov@google.com>
106 lines
3.0 KiB
C++
106 lines
3.0 KiB
C++
// Copyright (c) 2017, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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// This file contains few helpful marker types that can be used with
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// MakeLocationSummaryFromEmitter and InvokeEmitter to simplify writing
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// of ARM code.
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#ifndef RUNTIME_VM_COMPILER_BACKEND_LOCATIONS_HELPERS_ARM_H_
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#define RUNTIME_VM_COMPILER_BACKEND_LOCATIONS_HELPERS_ARM_H_
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#if defined(DART_PRECOMPILED_RUNTIME)
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#error "AOT runtime should not use compiler sources (including header files)"
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#endif // defined(DART_PRECOMPILED_RUNTIME)
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namespace dart {
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// QRegisterView is a wrapper around QRegister that provides helpers for
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// accessing S and D components.
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class QRegisterView {
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public:
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explicit QRegisterView(QRegister reg) : reg_(reg) {}
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operator QRegister() const { return reg_; }
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inline DRegister d(intptr_t i) const {
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ASSERT(0 <= i && i < 2);
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return static_cast<DRegister>(reg_ * 2 + i);
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}
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inline SRegister s(intptr_t i) const {
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ASSERT(0 <= i && i < 4);
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ASSERT(reg_ <= Q7);
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return static_cast<SRegister>(reg_ * 4 + i);
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}
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private:
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QRegister reg_;
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};
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// FixedQRegisterView<r> is a handy replacement for Fixed<QRegister, r> that
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// provides helpers for accessing S and D components.
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//
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// Note: this class is provided because Fixed<QRegisterView, r> is not a valid
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// type.
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template <QRegister reg>
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class FixedQRegisterView {
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public:
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inline DRegister d(intptr_t i) const {
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return static_cast<DRegister>(reg * 2 + i);
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}
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inline SRegister s(intptr_t i) const {
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return static_cast<SRegister>(reg * 4 + i);
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}
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operator QRegister() const { return reg; }
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};
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template <>
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struct LocationTrait<QRegisterView> {
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static const bool kIsTemp = false;
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static QRegisterView Unwrap(const Location& loc) {
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return QRegisterView(loc.fpu_reg());
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}
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template <intptr_t arity, intptr_t index>
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static QRegisterView UnwrapInput(LocationSummary* locs) {
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return Unwrap(locs->in(index));
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}
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template <intptr_t arity, intptr_t index>
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static void SetInputConstraint(LocationSummary* locs) {
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locs->set_in(index, ToConstraint());
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}
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static Location ToConstraint() { return Location::RequiresFpuRegister(); }
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};
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template <QRegister reg>
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struct LocationTrait<FixedQRegisterView<reg> > {
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static const bool kIsTemp = false;
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static FixedQRegisterView<reg> Unwrap(const Location& loc) {
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ASSERT(LocationTrait<QRegister>::Unwrap(loc) == reg);
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return FixedQRegisterView<reg>();
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}
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template <intptr_t arity, intptr_t index>
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static FixedQRegisterView<reg> UnwrapInput(LocationSummary* locs) {
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return Unwrap(locs->in(index));
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}
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template <intptr_t arity, intptr_t index>
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static void SetInputConstraint(LocationSummary* locs) {
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locs->set_in(index, ToConstraint());
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}
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static Location ToConstraint() { return Location::FpuRegisterLocation(reg); }
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};
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} // namespace dart
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#endif // RUNTIME_VM_COMPILER_BACKEND_LOCATIONS_HELPERS_ARM_H_
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