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| 1 // Copyright 2014 the V8 project authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #include "src/compiler/instruction-scheduler.h" |
| 6 |
| 7 namespace v8 { |
| 8 namespace internal { |
| 9 namespace compiler { |
| 10 |
| 11 int InstructionScheduler::GetInstructionLatency(const Instruction* instr) { |
| 12 // Basic latency modeling for arm64 instructions. They have been determined |
| 13 // in an empirical way. |
| 14 switch (instr->arch_opcode()) { |
| 15 case kArm64Float32ToFloat64: |
| 16 case kArm64Float64ToFloat32: |
| 17 case kArm64Float64ToInt32: |
| 18 case kArm64Float64ToUint32: |
| 19 case kArm64Int32ToFloat64: |
| 20 case kArm64Uint32ToFloat64: |
| 21 return 3; |
| 22 |
| 23 case kArm64Float64Add: |
| 24 case kArm64Float64Sub: |
| 25 return 2; |
| 26 |
| 27 case kArm64Float64Mul: |
| 28 return 3; |
| 29 |
| 30 case kArm64Float64Div: |
| 31 return 6; |
| 32 |
| 33 case kArm64Lsl: |
| 34 case kArm64Lsl32: |
| 35 case kArm64Lsr: |
| 36 case kArm64Lsr32: |
| 37 case kArm64Asr: |
| 38 case kArm64Asr32: |
| 39 case kArm64Ror: |
| 40 case kArm64Ror32: |
| 41 return 3; |
| 42 |
| 43 case kCheckedLoadInt8: |
| 44 case kCheckedLoadUint8: |
| 45 case kCheckedLoadInt16: |
| 46 case kCheckedLoadUint16: |
| 47 case kCheckedLoadWord32: |
| 48 case kCheckedLoadWord64: |
| 49 case kCheckedLoadFloat32: |
| 50 case kCheckedLoadFloat64: |
| 51 case kArm64LdrS: |
| 52 case kArm64LdrD: |
| 53 case kArm64Ldrb: |
| 54 case kArm64Ldrsb: |
| 55 case kArm64Ldrh: |
| 56 case kArm64Ldrsh: |
| 57 case kArm64LdrW: |
| 58 case kArm64Ldr: |
| 59 return 5; |
| 60 |
| 61 default: |
| 62 return 1; |
| 63 } |
| 64 } |
| 65 |
| 66 } // namespace compiler |
| 67 } // namespace internal |
| 68 } // namespace v8 |
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Chromium Code Reviews
Issue 1375253002:
[WIP][turbofan] Instruction scheduler for Turbofan. (Closed)
Base URL: https://chromium.googlesource.com/v8/v8.git@master