97 lines
3.1 KiB
C++
97 lines
3.1 KiB
C++
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// Copyright 2009 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include "v8.h"
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#include "codegen.h"
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#include "register-allocator.h"
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namespace v8 { namespace internal {
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// -------------------------------------------------------------------------
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// Result implementation.
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void Result::ToRegister() {
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UNIMPLEMENTED();
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}
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void Result::ToRegister(Register target) {
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UNIMPLEMENTED();
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}
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// -------------------------------------------------------------------------
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// RegisterAllocator implementation.
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RegisterFile RegisterAllocator::Reserved() {
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RegisterFile reserved;
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reserved.Use(sp);
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reserved.Use(fp);
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reserved.Use(cp);
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reserved.Use(pc);
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return reserved;
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}
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void RegisterAllocator::UnuseReserved(RegisterFile* register_file) {
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register_file->ref_counts_[sp.code()] = 0;
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register_file->ref_counts_[fp.code()] = 0;
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register_file->ref_counts_[cp.code()] = 0;
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register_file->ref_counts_[pc.code()] = 0;
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}
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void RegisterAllocator::Initialize() {
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Reset();
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// The following registers are live on function entry, saved in the
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// frame, and available for allocation during execution.
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Use(r1); // JS function.
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Use(lr); // Return address.
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}
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void RegisterAllocator::Reset() {
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registers_.Reset();
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// The following registers are live on function entry and reserved
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// during execution.
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Use(sp); // Stack pointer.
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Use(fp); // Frame pointer (caller's frame pointer on entry).
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Use(cp); // Context context (callee's context on entry).
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Use(pc); // Program counter.
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}
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Result RegisterAllocator::AllocateByteRegisterWithoutSpilling() {
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UNIMPLEMENTED();
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Result invalid(cgen_);
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return invalid;
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}
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} } // namespace v8::internal
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