104 lines
3.1 KiB
C
104 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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#ifndef V8_ARM_REGISTER_ALLOCATOR_ARM_INL_H_
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#define V8_ARM_REGISTER_ALLOCATOR_ARM_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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return reg.is(cp) || reg.is(fp) || reg.is(sp) || reg.is(pc);
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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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//
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// r0 <-> 0
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// r1 <-> 1
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// r2 <-> 2
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// r3 <-> 3
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// r4 <-> 4
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// r5 <-> 5
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// r6 <-> 6
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// r7 <-> 7
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// r9 <-> 8
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// r10 <-> 9
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// ip <-> 10
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// lr <-> 11
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int RegisterAllocator::ToNumber(Register reg) {
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ASSERT(reg.is_valid() && !IsReserved(reg));
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static int numbers[] = {
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0, // r0
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1, // r1
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2, // r2
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3, // r3
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4, // r4
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5, // r5
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6, // r6
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7, // r7
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-1, // cp
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8, // r9
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9, // r10
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-1, // fp
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10, // ip
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-1, // sp
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11, // lr
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-1 // pc
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};
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return numbers[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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static Register registers[] =
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{ r0, r1, r2, r3, r4, r5, r6, r7, r9, r10, ip, lr };
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return registers[num];
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}
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void RegisterAllocator::Initialize() {
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Reset();
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// The non-reserved r1 and lr registers are live on JS function entry.
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Use(r1); // JS function.
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Use(lr); // Return address.
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}
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} } // namespace v8::internal
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#endif // V8_ARM_REGISTER_ALLOCATOR_ARM_INL_H_
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