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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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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); |
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 static const int numbers[] = { | 49 const int kNumbers[] = { |
50 0, // rax | 50 0, // rax |
51 2, // rcx | 51 2, // rcx |
52 3, // rdx | 52 3, // rdx |
53 1, // rbx | 53 1, // rbx |
54 -1, // rsp | 54 -1, // rsp |
55 -1, // rbp | 55 -1, // rbp |
56 -1, // rsi | 56 -1, // rsi |
57 4, // rdi | 57 4, // rdi |
58 5, // r8 | 58 5, // r8 |
59 6, // r9 | 59 6, // r9 |
60 -1, // r10 | 60 -1, // r10 |
61 7, // r11 | 61 7, // r11 |
62 11, // r12 | 62 11, // r12 |
63 10, // r13 | 63 10, // r13 |
64 8, // r14 | 64 8, // r14 |
65 9 // r15 | 65 9 // r15 |
66 }; | 66 }; |
67 return numbers[reg.code()]; | 67 return kNumbers[reg.code()]; |
68 } | 68 } |
69 | 69 |
70 | 70 |
71 Register RegisterAllocator::ToRegister(int num) { | 71 Register RegisterAllocator::ToRegister(int num) { |
72 ASSERT(num >= 0 && num < kNumRegisters); | 72 ASSERT(num >= 0 && num < kNumRegisters); |
73 static Register registers[] = | 73 const Register kRegisters[] = |
74 { rax, rbx, rcx, rdx, rdi, r8, r9, r11, r14, r15, r13, r12 }; | 74 { rax, rbx, rcx, rdx, rdi, r8, r9, r11, r14, r15, r13, r12 }; |
75 return registers[num]; | 75 return kRegisters[num]; |
76 } | 76 } |
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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