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1 // Copyright 2009 the V8 project authors. All rights reserved. | 1 // Copyright 2009 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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31 #include "v8.h" | 31 #include "v8.h" |
32 | 32 |
33 namespace v8 { | 33 namespace v8 { |
34 namespace internal { | 34 namespace internal { |
35 | 35 |
36 // ------------------------------------------------------------------------- | 36 // ------------------------------------------------------------------------- |
37 // RegisterAllocator implementation. | 37 // RegisterAllocator implementation. |
38 | 38 |
39 bool RegisterAllocator::IsReserved(Register reg) { | 39 bool RegisterAllocator::IsReserved(Register reg) { |
40 return reg.is(rsp) || reg.is(rbp) || reg.is(rsi) || | 40 return reg.is(rsp) || reg.is(rbp) || reg.is(rsi) || |
41 reg.is(kScratchRegister); | 41 reg.is(kScratchRegister) || reg.is(kRootRegister); |
42 } | 42 } |
43 | 43 |
44 | 44 |
45 // The register allocator uses small integers to represent the | 45 // The register allocator uses small integers to represent the |
46 // non-reserved assembler registers. | 46 // non-reserved assembler registers. |
47 int RegisterAllocator::ToNumber(Register reg) { | 47 int RegisterAllocator::ToNumber(Register reg) { |
48 ASSERT(reg.is_valid() && !IsReserved(reg)); | 48 ASSERT(reg.is_valid() && !IsReserved(reg)); |
49 const int kNumbers[] = { | 49 const int kNumbers[] = { |
50 0, // rax | 50 0, // rax |
51 2, // rcx | 51 2, // rcx |
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77 | 77 |
78 | 78 |
79 void RegisterAllocator::Initialize() { | 79 void RegisterAllocator::Initialize() { |
80 Reset(); | 80 Reset(); |
81 // The non-reserved rdi register is live on JS function entry. | 81 // The non-reserved rdi register is live on JS function entry. |
82 Use(rdi); // JS function. | 82 Use(rdi); // JS function. |
83 } | 83 } |
84 } } // namespace v8::internal | 84 } } // namespace v8::internal |
85 | 85 |
86 #endif // V8_X64_REGISTER_ALLOCATOR_X64_INL_H_ | 86 #endif // V8_X64_REGISTER_ALLOCATOR_X64_INL_H_ |
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