Ryan Macnak
e386db978e
Most functions use CallToRuntime for the stack overflow check. precompiled dart2js arm 20388895 -> 20308640 (-0.39%) R=fschneider@google.com Review URL: https://codereview.chromium.org/1778103003 .
64 lines
2.1 KiB
C++
64 lines
2.1 KiB
C++
// Copyright (c) 2013, 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_MIPS)
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#include "vm/runtime_entry.h"
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#include "vm/assembler.h"
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#include "vm/simulator.h"
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#include "vm/stub_code.h"
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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() ||
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(!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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// 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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// S5 : address of the runtime function to call.
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// S4 : number of arguments to the call.
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void RuntimeEntry::Call(Assembler* assembler, intptr_t argument_count) const {
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if (is_leaf()) {
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ASSERT(argument_count == this->argument_count());
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__ lw(T9, Address(THR, Thread::OffsetFromThread(this)));
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__ jalr(T9);
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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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__ lw(S5, Address(THR, Thread::OffsetFromThread(this)));
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__ LoadImmediate(S4, argument_count);
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__ BranchLinkToRuntime();
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}
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}
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} // namespace dart
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#endif // defined TARGET_ARCH_MIPS
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