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Unified Diff: src/compiler/arm64/instruction-selector-arm64.cc

Issue 2649703002: [Atomics] Make Atomics.compareExchange a builtin using TF (Closed)
Patch Set: dmb Created 3 years, 10 months ago
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Index: src/compiler/arm64/instruction-selector-arm64.cc
diff --git a/src/compiler/arm64/instruction-selector-arm64.cc b/src/compiler/arm64/instruction-selector-arm64.cc
index ad45e9797b09ef3f053086244c159fbca1c07528..30646fd9f0e06854713959345ca27a25df916eb2 100644
--- a/src/compiler/arm64/instruction-selector-arm64.cc
+++ b/src/compiler/arm64/instruction-selector-arm64.cc
@@ -2737,6 +2737,45 @@ void InstructionSelector::VisitAtomicExchange(Node* node) {
Emit(code, 1, outputs, input_count, inputs, 1, temp);
}
+void InstructionSelector::VisitAtomicCompareExchange(Node* node) {
+ Arm64OperandGenerator g(this);
+ Node* base = node->InputAt(0);
+ Node* index = node->InputAt(1);
+ Node* old_value = node->InputAt(2);
+ Node* new_value = node->InputAt(3);
+ ArchOpcode opcode = kArchNop;
+ MachineType type = AtomicCompareExchangeRepresentationOf(node->op());
+ if (type == MachineType::Int8()) {
+ opcode = kAtomicCompareExchangeInt8;
+ } else if (type == MachineType::Uint8()) {
+ opcode = kAtomicCompareExchangeUint8;
+ } else if (type == MachineType::Int16()) {
+ opcode = kAtomicCompareExchangeInt16;
+ } else if (type == MachineType::Uint16()) {
+ opcode = kAtomicCompareExchangeUint16;
+ } else if (type == MachineType::Int32() || type == MachineType::Uint32()) {
+ opcode = kAtomicCompareExchangeWord32;
+ } else {
+ UNREACHABLE();
+ return;
+ }
+
+ AddressingMode addressing_mode = kMode_MRR;
+ InstructionOperand inputs[4];
+ size_t input_count = 0;
+ inputs[input_count++] = g.UseUniqueRegister(base);
+ inputs[input_count++] = g.UseUniqueRegister(index);
+ inputs[input_count++] = g.UseUniqueRegister(old_value);
+ inputs[input_count++] = g.UseUniqueRegister(new_value);
+ InstructionOperand outputs[1];
+ outputs[0] = g.UseUniqueRegister(node);
+ InstructionOperand temp[2];
+ temp[0] = g.TempRegister();
+ temp[1] = g.TempRegister();
+ InstructionCode code = opcode | AddressingModeField::encode(addressing_mode);
+ Emit(code, 1, outputs, input_count, inputs, 2, temp);
+}
+
// static
MachineOperatorBuilder::Flags
InstructionSelector::SupportedMachineOperatorFlags() {

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