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| 1 // Copyright 2016 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/simd-lowering.h" |
| 6 |
| 7 #include "src/assembler.h" |
| 8 #include "src/compiler/js-graph.h" |
| 9 #include "src/compiler/linkage.h" |
| 10 #include "src/compiler/machine-operator.h" |
| 11 #include "src/compiler/operator-properties.h" |
| 12 #include "src/compiler/simplified-operator.h" |
| 13 |
| 14 namespace v8 { |
| 15 namespace internal { |
| 16 namespace compiler { |
| 17 |
| 18 SimdLowering::~SimdLowering() {} |
| 19 |
| 20 Reduction SimdLowering::Reduce(Node* node) { |
| 21 // For now lower everything to runtime calls. |
| 22 switch (node->opcode()) { |
| 23 case IrOpcode::kCreateInt32x4: { |
| 24 static const Conversion signature[] = {kOpaque, kInt32, kInt32, kInt32, |
| 25 kInt32}; |
| 26 return ChangeToRuntimeCall(node, Runtime::kCreateInt32x4, signature); |
| 27 } |
| 28 case IrOpcode::kCreateInt16x8: { |
| 29 static const Conversion signature[] = { |
| 30 kOpaque, kInt32, kInt32, kInt32, kInt32, |
| 31 kInt32, kInt32, kInt32, kInt32, |
| 32 }; |
| 33 return ChangeToRuntimeCall(node, Runtime::kCreateInt16x8, signature); |
| 34 } |
| 35 case IrOpcode::kCreateInt8x16: { |
| 36 static const Conversion signature[] = { |
| 37 kOpaque, kInt32, kInt32, kInt32, kInt32, kInt32, |
| 38 kInt32, kInt32, kInt32, kInt32, kInt32, kInt32, |
| 39 kInt32, kInt32, kInt32, kInt32, kInt32, |
| 40 }; |
| 41 return ChangeToRuntimeCall(node, Runtime::kCreateInt8x16, signature); |
| 42 } |
| 43 case IrOpcode::kCreateFloat32x4: { |
| 44 static const Conversion signature[] = {kOpaque, kFloat32, kFloat32, |
| 45 kFloat32, kFloat32}; |
| 46 return ChangeToRuntimeCall(node, Runtime::kCreateFloat32x4, signature); |
| 47 } |
| 48 case IrOpcode::kInt8x16ExtractLane: |
| 49 case IrOpcode::kInt16x8ExtractLane: |
| 50 case IrOpcode::kInt32x4ExtractLane: { |
| 51 static const Conversion signature[] = {kInt32, kOpaque, kInt32}; |
| 52 return ChangeToRuntimeCall(node, Runtime::kInt32x4ExtractLane, signature); |
| 53 } |
| 54 case IrOpcode::kFloat32x4ExtractLane: { |
| 55 static const Conversion signature[] = {kFloat32, kOpaque, kInt32}; |
| 56 return ChangeToRuntimeCall(node, Runtime::kFloat32x4ExtractLane, |
| 57 signature); |
| 58 } |
| 59 default: { break; } |
| 60 } |
| 61 |
| 62 // TODO(gdeepti): Implement and test. |
| 63 // Assume the others are all just simd in and out. |
| 64 Conversion signature[17] = { |
| 65 kNone, kNone, kNone, kNone, kNone, kNone, kNone, kNone, kNone, |
| 66 kNone, kNone, kNone, kNone, kNone, kNone, kNone, kNone, |
| 67 }; |
| 68 switch (node->opcode()) { |
| 69 #define F(Opcode) \ |
| 70 case IrOpcode::k##Opcode: { \ |
| 71 return ChangeToRuntimeCall(node, Runtime::k##Opcode, signature); \ |
| 72 } |
| 73 MACHINE_SIMD_RETURN_SIMD_OP_LIST(F) |
| 74 MACHINE_SIMD_RETURN_BOOL_OP_LIST(F) |
| 75 #undef F |
| 76 default: { return NoChange(); } |
| 77 } |
| 78 UNREACHABLE(); |
| 79 return NoChange(); |
| 80 } |
| 81 |
| 82 Reduction SimdLowering::ChangeToRuntimeCall(Node* node, |
| 83 Runtime::FunctionId function_id, |
| 84 const Conversion* signature) { |
| 85 SimplifiedOperatorBuilder simplified(jsgraph()->zone()); |
| 86 const Runtime::Function* function = Runtime::FunctionForId(function_id); |
| 87 CallDescriptor* desc = Linkage::GetRuntimeCallDescriptor( |
| 88 jsgraph()->zone(), function_id, function->nargs, Operator::kNoProperties, |
| 89 CallDescriptor::kNoFlags); |
| 90 const int kInputSize = 16; |
| 91 const int kDefaultFunctionParams = 6; |
| 92 Node* inputs[kInputSize + kDefaultFunctionParams]; |
| 93 DCHECK_LE(function->nargs + kDefaultFunctionParams, |
| 94 static_cast<int>(arraysize(inputs))); |
| 95 // Either there are control + effect or not. |
| 96 DCHECK(node->InputCount() == function->nargs || |
| 97 node->InputCount() == function->nargs + 2); |
| 98 int index = 0; |
| 99 inputs[index++] = jsgraph()->CEntryStubConstant(function->result_size); |
| 100 for (int i = 0; i < function->nargs; ++i) { |
| 101 Node* arg = node->InputAt(i); |
| 102 switch (signature[i + 1]) { |
| 103 case kInt32: |
| 104 arg = builder_->BuildChangeInt32ToTagged(arg); |
| 105 break; |
| 106 case kFloat32: |
| 107 arg = jsgraph()->graph()->NewNode( |
| 108 jsgraph()->machine()->ChangeFloat32ToFloat64(), arg); |
| 109 arg = builder_->BuildChangeFloat64ToTagged(arg); |
| 110 break; |
| 111 case kFloat64: |
| 112 arg = builder_->BuildChangeFloat64ToTagged(arg); |
| 113 break; |
| 114 default: |
| 115 break; |
| 116 } |
| 117 inputs[index++] = arg; |
| 118 } |
| 119 inputs[index++] = jsgraph()->ExternalConstant( |
| 120 ExternalReference(function_id, jsgraph()->isolate())); |
| 121 inputs[index++] = jsgraph()->Int32Constant(function->nargs); |
| 122 inputs[index++] = jsgraph()->Constant(context_); |
| 123 // Loads and stores have control and effect, others do not and use |
| 124 // the start node instead. |
| 125 if (node->InputCount() == function->nargs + 2) { |
| 126 inputs[index++] = node->InputAt(function->nargs + 1); // effect |
| 127 inputs[index++] = node->InputAt(function->nargs + 2); // control |
| 128 } else { |
| 129 inputs[index++] = jsgraph()->graph()->start(); // effect |
| 130 inputs[index++] = jsgraph()->graph()->start(); // control |
| 131 } |
| 132 Node* ret = jsgraph()->graph()->NewNode(jsgraph()->common()->Call(desc), |
| 133 index, inputs); |
| 134 |
| 135 Conversion return_type = signature[0]; |
| 136 switch (return_type) { |
| 137 case kInt32: |
| 138 ret = builder_->BuildChangeTaggedToInt32(ret); |
| 139 break; |
| 140 case kFloat32: |
| 141 NodeProperties::SetType(ret, Type::Number()); |
| 142 ret = builder_->BuildChangeTaggedToFloat64(ret); |
| 143 ret = jsgraph()->graph()->NewNode( |
| 144 jsgraph()->machine()->TruncateInt64ToInt32(), ret); |
| 145 break; |
| 146 case kFloat64: |
| 147 ret = builder_->BuildChangeTaggedToFloat64(ret); |
| 148 break; |
| 149 default: |
| 150 break; |
| 151 } |
| 152 return Replace(ret); |
| 153 } |
| 154 |
| 155 } // namespace compiler |
| 156 } // namespace internal |
| 157 } // namespace v8 |
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