Tess Strickland
e7a2fbe692
The only architecture-specific part of type testing stubs (TTS) is which registers get saved/restored across SubtypeTestCache stub calls in the slow TTS implementation, which is now a register mask constant in the TypeTestABI struct. This CL also: * Creates a single definition of OperandSize in assembler_base.h. Moves OperandSize into the compiler namespace. assembler_base.h. Renames constants common to all architectures to neutral names (e.g., kWord => kFourBytes), since "word" has different meanings across architectures. * Creates a new JumpDistance enum for kNearJump/kFarJump in AssemblerBase and replace existing bool uses with the constants. * Adds JumpDistance arguments to some of the generalized Assembler methods so they aren't forced to use far jumps on IA32/X64. These added JumpDistance arguments are ignored on ARM architectures. * Adds a new generalized Assembler::LoadIndexedPayload method for loading indexed objects out of post-header variable-length payloads. * Moved the OperandSize argument for LoadForOffset and similar methods on 32-bit ARM from being the first argument to being the second to last argument just to match other architectures, and to allow it to have a default value of kFourBytes. TEST=Run on trybots of all architectures. Cq-Include-Trybots: luci.dart.try:vm-kernel-linux-debug-x64-try,vm-kernel-nnbd-linux-debug-x64-try,vm-kernel-linux-debug-ia32-try,vm-kernel-nnbd-linux-debug-ia32-try,vm-kernel-precomp-linux-debug-simarm_x64-try,vm-kernel-precomp-linux-debug-x64-try,vm-kernel-precomp-nnbd-linux-debug-simarm_x64-try,vm-kernel-precomp-nnbd-linux-debug-x64-try,vm-kernel-linux-release-simarm-try,vm-kernel-linux-release-simarm64-try,vm-kernel-nnbd-linux-release-simarm-try,vm-kernel-nnbd-linux-release-simarm64-try,vm-kernel-precomp-linux-release-simarm-try,vm-kernel-precomp-linux-release-simarm64-try,vm-kernel-precomp-nnbd-linux-release-simarm64-try Change-Id: Ia930613e96db4d1ab324c5a355dca8994d2a77f0 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/172160 Commit-Queue: Tess Strickland <sstrickl@google.com> Reviewed-by: Martin Kustermann <kustermann@google.com>
77 lines
2.8 KiB
C++
77 lines
2.8 KiB
C++
// Copyright (c) 2011, 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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#include "vm/globals.h"
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#if defined(TARGET_ARCH_ARM)
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#include "vm/runtime_entry.h"
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#include "vm/simulator.h"
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#include "vm/stub_code.h"
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#if !defined(DART_PRECOMPILED_RUNTIME)
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#include "vm/compiler/assembler/assembler.h"
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#endif // !defined(DART_PRECOMPILED_RUNTIME)
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namespace dart {
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#define __ assembler->
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uword RuntimeEntry::GetEntryPoint() const {
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// Compute the effective address. When running under the simulator,
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// this is a redirection address that forces the simulator to call
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// into the runtime system.
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uword entry = reinterpret_cast<uword>(function());
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#if defined(USING_SIMULATOR)
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// Redirection to leaf runtime calls supports a maximum of 4 arguments passed
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// in registers (maximum 2 double arguments for leaf float runtime calls).
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ASSERT(argument_count() >= 0);
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ASSERT(!is_leaf() || (!is_float() && (argument_count() <= 4)) ||
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(argument_count() <= 2));
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Simulator::CallKind call_kind =
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is_leaf() ? (is_float() ? Simulator::kLeafFloatRuntimeCall
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: Simulator::kLeafRuntimeCall)
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: Simulator::kRuntimeCall;
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entry =
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Simulator::RedirectExternalReference(entry, call_kind, argument_count());
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#endif
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return entry;
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}
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#if !defined(DART_PRECOMPILED_RUNTIME)
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// Generate code to call into the stub which will call the runtime
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// function. Input for the stub is as follows:
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// SP : points to the arguments and return value array.
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// R9 : address of the runtime function to call.
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// R4 : number of arguments to the call.
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void RuntimeEntry::CallInternal(const RuntimeEntry* runtime_entry,
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compiler::Assembler* assembler,
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intptr_t argument_count) {
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if (runtime_entry->is_leaf()) {
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ASSERT(argument_count == runtime_entry->argument_count());
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__ LoadFromOffset(
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TMP, THR, compiler::target::Thread::OffsetFromThread(runtime_entry));
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__ str(TMP,
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compiler::Address(THR, compiler::target::Thread::vm_tag_offset()));
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__ blx(TMP);
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__ LoadImmediate(TMP, VMTag::kDartTagId);
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__ str(TMP,
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compiler::Address(THR, compiler::target::Thread::vm_tag_offset()));
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ASSERT((kAbiPreservedCpuRegs & (1 << THR)) != 0);
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ASSERT((kAbiPreservedCpuRegs & (1 << PP)) != 0);
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} else {
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// Argument count is not checked here, but in the runtime entry for a more
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// informative error message.
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__ LoadFromOffset(
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R9, THR, compiler::target::Thread::OffsetFromThread(runtime_entry));
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__ LoadImmediate(R4, argument_count);
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__ BranchLinkToRuntime();
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}
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}
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#endif // !defined(DART_PRECOMPILED_RUNTIME)
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} // namespace dart
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#endif // defined TARGET_ARCH_ARM
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