38f5a84701
Review URL: http://codereview.chromium.org/149799 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@2494 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
83 lines
2.9 KiB
C++
83 lines
2.9 KiB
C++
// 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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#ifndef V8_IA32_REGISTER_ALLOCATOR_IA32_INL_H_
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#define V8_IA32_REGISTER_ALLOCATOR_IA32_INL_H_
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#include "v8.h"
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namespace v8 {
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namespace internal {
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// -------------------------------------------------------------------------
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// RegisterAllocator implementation.
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bool RegisterAllocator::IsReserved(Register reg) {
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// The code for this test relies on the order of register codes.
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return reg.code() >= esp.code() && reg.code() <= esi.code();
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}
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// The register allocator uses small integers to represent the
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// non-reserved assembler registers. The mapping is:
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// eax <-> 0, ebx <-> 1, ecx <-> 2, edx <-> 3, edi <-> 4.
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int RegisterAllocator::ToNumber(Register reg) {
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ASSERT(reg.is_valid() && !IsReserved(reg));
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const int kNumbers[] = {
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0, // eax
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2, // ecx
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3, // edx
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1, // ebx
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-1, // esp
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-1, // ebp
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-1, // esi
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4 // edi
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};
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return kNumbers[reg.code()];
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}
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Register RegisterAllocator::ToRegister(int num) {
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ASSERT(num >= 0 && num < kNumRegisters);
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const Register kRegisters[] = { eax, ebx, ecx, edx, edi };
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return kRegisters[num];
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}
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void RegisterAllocator::Initialize() {
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Reset();
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// The non-reserved edi register is live on JS function entry.
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Use(edi); // JS function.
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}
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} } // namespace v8::internal
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#endif // V8_IA32_REGISTER_ALLOCATOR_IA32_INL_H_
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