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Unified Diff: src/arm/register-allocator-arm-inl.h

Issue 113837: Change the register allocator so that it no longer tracks references... (Closed) Base URL: http://v8.googlecode.com/svn/branches/bleeding_edge/
Patch Set: '' Created 11 years, 7 months ago
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Index: src/arm/register-allocator-arm-inl.h
===================================================================
--- src/arm/register-allocator-arm-inl.h (revision 0)
+++ src/arm/register-allocator-arm-inl.h (revision 0)
@@ -0,0 +1,103 @@
+// 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_ARM_REGISTER_ALLOCATOR_ARM_INL_H_
+#define V8_ARM_REGISTER_ALLOCATOR_ARM_INL_H_
+
+#include "v8.h"
+
+namespace v8 {
+namespace internal {
+
+// -------------------------------------------------------------------------
+// RegisterAllocator implementation.
+
+bool RegisterAllocator::IsReserved(Register reg) {
+ return reg.is(cp) || reg.is(fp) || reg.is(sp) || reg.is(pc);
+}
+
+
+
+// The register allocator uses small integers to represent the
+// non-reserved assembler registers. The mapping is:
+//
+// r0 <-> 0
+// r1 <-> 1
+// r2 <-> 2
+// r3 <-> 3
+// r4 <-> 4
+// r5 <-> 5
+// r6 <-> 6
+// r7 <-> 7
+// r9 <-> 8
+// r10 <-> 9
+// ip <-> 10
+// lr <-> 11
+
+int RegisterAllocator::ToNumber(Register reg) {
+ ASSERT(reg.is_valid() && !IsReserved(reg));
+ static int numbers[] = {
+ 0, // r0
+ 1, // r1
+ 2, // r2
+ 3, // r3
+ 4, // r4
+ 5, // r5
+ 6, // r6
+ 7, // r7
+ -1, // cp
+ 8, // r9
+ 9, // r10
+ -1, // fp
+ 10, // ip
+ -1, // sp
+ 11, // lr
+ -1 // pc
+ };
+ return numbers[reg.code()];
+}
+
+
+Register RegisterAllocator::ToRegister(int num) {
+ ASSERT(num >= 0 && num < kNumRegisters);
+ static Register registers[] =
+ { r0, r1, r2, r3, r4, r5, r6, r7, r9, r10, ip, lr };
+ return registers[num];
+}
+
+
+void RegisterAllocator::Initialize() {
+ Reset();
+ // The non-reserved r1 and lr registers are live on JS function entry.
+ Use(r1); // JS function.
+ Use(lr); // Return address.
+}
+
+
+} } // namespace v8::internal
+
+#endif // V8_ARM_REGISTER_ALLOCATOR_ARM_INL_H_

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