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