Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1 | // Copyright 2011 the V8 project authors. All rights reserved. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 4 | |
| 5 | |
| 6 | |
| 7 | #ifndef V8_MIPS_FRAMES_MIPS_H_ |
| 8 | #define V8_MIPS_FRAMES_MIPS_H_ |
| 9 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 10 | namespace v8 { |
| 11 | namespace internal { |
| 12 | |
| 13 | // Register lists. |
| 14 | // Note that the bit values must match those used in actual instruction |
| 15 | // encoding. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 16 | const int kNumRegs = 32; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 17 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 18 | const RegList kJSCallerSaved = |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 19 | 1 << 2 | // v0 |
| 20 | 1 << 3 | // v1 |
| 21 | 1 << 4 | // a0 |
| 22 | 1 << 5 | // a1 |
| 23 | 1 << 6 | // a2 |
| 24 | 1 << 7 | // a3 |
| 25 | 1 << 8 | // t0 |
| 26 | 1 << 9 | // t1 |
| 27 | 1 << 10 | // t2 |
| 28 | 1 << 11 | // t3 |
| 29 | 1 << 12 | // t4 |
| 30 | 1 << 13 | // t5 |
| 31 | 1 << 14 | // t6 |
| 32 | 1 << 15; // t7 |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 33 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 34 | const int kNumJSCallerSaved = 14; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 35 | |
| 36 | |
| 37 | // Return the code of the n-th caller-saved register available to JavaScript |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 38 | // e.g. JSCallerSavedReg(0) returns a0.code() == 4. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 39 | int JSCallerSavedCode(int n); |
| 40 | |
| 41 | |
| 42 | // Callee-saved registers preserved when switching from C to JavaScript. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 43 | const RegList kCalleeSaved = |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 44 | 1 << 16 | // s0 |
| 45 | 1 << 17 | // s1 |
| 46 | 1 << 18 | // s2 |
| 47 | 1 << 19 | // s3 |
| 48 | 1 << 20 | // s4 |
| 49 | 1 << 21 | // s5 |
| 50 | 1 << 22 | // s6 (roots in Javascript code) |
| 51 | 1 << 23 | // s7 (cp in Javascript code) |
| 52 | 1 << 30; // fp/s8 |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 53 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 54 | const int kNumCalleeSaved = 9; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 55 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 56 | const RegList kCalleeSavedFPU = |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 57 | 1 << 20 | // f20 |
| 58 | 1 << 22 | // f22 |
| 59 | 1 << 24 | // f24 |
| 60 | 1 << 26 | // f26 |
| 61 | 1 << 28 | // f28 |
| 62 | 1 << 30; // f30 |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 63 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 64 | const int kNumCalleeSavedFPU = 6; |
| 65 | |
| 66 | const RegList kCallerSavedFPU = |
| 67 | 1 << 0 | // f0 |
| 68 | 1 << 2 | // f2 |
| 69 | 1 << 4 | // f4 |
| 70 | 1 << 6 | // f6 |
| 71 | 1 << 8 | // f8 |
| 72 | 1 << 10 | // f10 |
| 73 | 1 << 12 | // f12 |
| 74 | 1 << 14 | // f14 |
| 75 | 1 << 16 | // f16 |
| 76 | 1 << 18; // f18 |
| 77 | |
| 78 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 79 | // Number of registers for which space is reserved in safepoints. Must be a |
| 80 | // multiple of 8. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 81 | const int kNumSafepointRegisters = 24; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 82 | |
| 83 | // Define the list of registers actually saved at safepoints. |
| 84 | // Note that the number of saved registers may be smaller than the reserved |
| 85 | // space, i.e. kNumSafepointSavedRegisters <= kNumSafepointRegisters. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 86 | const RegList kSafepointSavedRegisters = kJSCallerSaved | kCalleeSaved; |
| 87 | const int kNumSafepointSavedRegisters = |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 88 | kNumJSCallerSaved + kNumCalleeSaved; |
| 89 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 90 | const int kUndefIndex = -1; |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 91 | // Map with indexes on stack that corresponds to codes of saved registers. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 92 | const int kSafepointRegisterStackIndexMap[kNumRegs] = { |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 93 | kUndefIndex, // zero_reg |
| 94 | kUndefIndex, // at |
| 95 | 0, // v0 |
| 96 | 1, // v1 |
| 97 | 2, // a0 |
| 98 | 3, // a1 |
| 99 | 4, // a2 |
| 100 | 5, // a3 |
| 101 | 6, // t0 |
| 102 | 7, // t1 |
| 103 | 8, // t2 |
| 104 | 9, // t3 |
| 105 | 10, // t4 |
| 106 | 11, // t5 |
| 107 | 12, // t6 |
| 108 | 13, // t7 |
| 109 | 14, // s0 |
| 110 | 15, // s1 |
| 111 | 16, // s2 |
| 112 | 17, // s3 |
| 113 | 18, // s4 |
| 114 | 19, // s5 |
| 115 | 20, // s6 |
| 116 | 21, // s7 |
| 117 | kUndefIndex, // t8 |
| 118 | kUndefIndex, // t9 |
| 119 | kUndefIndex, // k0 |
| 120 | kUndefIndex, // k1 |
| 121 | kUndefIndex, // gp |
| 122 | kUndefIndex, // sp |
| 123 | 22, // fp |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 124 | kUndefIndex |
| 125 | }; |
| 126 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 127 | |
| 128 | // ---------------------------------------------------- |
| 129 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 130 | class EntryFrameConstants : public AllStatic { |
| 131 | public: |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 132 | static const int kCallerFPOffset = |
| 133 | -(StandardFrameConstants::kFixedFrameSizeFromFp + kPointerSize); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 134 | }; |
| 135 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 136 | class ExitFrameConstants : public TypedFrameConstants { |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 137 | public: |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 138 | static const int kSPOffset = TYPED_FRAME_PUSHED_VALUE_OFFSET(0); |
| 139 | static const int kCodeOffset = TYPED_FRAME_PUSHED_VALUE_OFFSET(1); |
| 140 | DEFINE_TYPED_FRAME_SIZES(2); |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 141 | |
| 142 | // The caller fields are below the frame pointer on the stack. |
| 143 | static const int kCallerFPOffset = +0 * kPointerSize; |
| 144 | // The calling JS function is between FP and PC. |
| 145 | static const int kCallerPCOffset = +1 * kPointerSize; |
| 146 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 147 | // MIPS-specific: a pointer to the old sp to avoid unnecessary calculations. |
| 148 | static const int kCallerSPOffset = +2 * kPointerSize; |
| 149 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 150 | // FP-relative displacement of the caller's SP. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 151 | static const int kCallerSPDisplacement = +2 * kPointerSize; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 152 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 153 | static const int kConstantPoolOffset = 0; // Not used. |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 154 | }; |
| 155 | |
| 156 | |
| 157 | class JavaScriptFrameConstants : public AllStatic { |
| 158 | public: |
| 159 | // FP-relative. |
| 160 | static const int kLocal0Offset = StandardFrameConstants::kExpressionsOffset; |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 161 | static const int kLastParameterOffset = +2 * kPointerSize; |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 162 | static const int kFunctionOffset = StandardFrameConstants::kFunctionOffset; |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 163 | |
| 164 | // Caller SP-relative. |
| 165 | static const int kParam0Offset = -2 * kPointerSize; |
| 166 | static const int kReceiverOffset = -1 * kPointerSize; |
| 167 | }; |
| 168 | |
| 169 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 170 | } // namespace internal |
| 171 | } // namespace v8 |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 172 | |
| 173 | #endif |