Index: src/ia32/register-allocator-ia32-inl.h |
=================================================================== |
--- src/ia32/register-allocator-ia32-inl.h (revision 0) |
+++ src/ia32/register-allocator-ia32-inl.h (revision 0) |
@@ -0,0 +1,82 @@ |
+// 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)); |
+ static int numbers[] = { |
+ 0, // eax |
+ 2, // ecx |
+ 3, // edx |
+ 1, // ebx |
+ -1, // esp |
+ -1, // ebp |
+ -1, // esi |
+ 4 // edi |
+ }; |
+ return numbers[reg.code()]; |
+} |
William Hesse
2009/05/26 13:33:32
You could map the codes 0,1,2,3, and 7 to the rang
Kevin Millikin (Chromium)
2009/05/27 07:43:07
I'll give it a try. It has the side effect of all
|
+ |
+ |
+Register RegisterAllocator::ToRegister(int num) { |
+ ASSERT(num >= 0 && num < kNumRegisters); |
+ static Register registers[] = { eax, ebx, ecx, edx, edi }; |
+ return registers[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_ |