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// Copyright 2009 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#ifndef V8_IA32_REGISTER_ALLOCATOR_IA32_INL_H_
#define V8_IA32_REGISTER_ALLOCATOR_IA32_INL_H_
#include "v8.h"
namespace v8 {
namespace internal {
// -------------------------------------------------------------------------
// RegisterAllocator implementation.
bool RegisterAllocator::IsReserved(Register reg) {
// The code for this test relies on the order of register codes.
return reg.code() >= esp.code() && reg.code() <= esi.code();
}
// The register allocator uses small integers to represent the
// non-reserved assembler registers. The mapping is:
// eax <-> 0, ebx <-> 1, ecx <-> 2, edx <-> 3, edi <-> 4.
int RegisterAllocator::ToNumber(Register reg) {
ASSERT(reg.is_valid() && !IsReserved(reg));
const int kNumbers[] = {
0, // eax
2, // ecx
3, // edx
1, // ebx
-1, // esp
-1, // ebp
-1, // esi
4 // edi
};
return kNumbers[reg.code()];
}
Register RegisterAllocator::ToRegister(int num) {
ASSERT(num >= 0 && num < kNumRegisters);
const Register kRegisters[] = { eax, ebx, ecx, edx, edi };
return kRegisters[num];
}
void RegisterAllocator::Initialize() {
Reset();
// The non-reserved edi register is live on JS function entry.
Use(edi); // JS function.
}
} } // namespace v8::internal
#endif // V8_IA32_REGISTER_ALLOCATOR_IA32_INL_H_
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