1 files changed, 170 insertions, 0 deletions
diff --git a/js/src/jit/x64/LIR-x64.h b/js/src/jit/x64/LIR-x64.h
new file mode 100644
index 0000000000..efaedc4499
--- /dev/null
+++ b/js/src/jit/x64/LIR-x64.h
@@ -0,0 +1,170 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: set ts=8 sts=2 et sw=2 tw=80:
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef jit_x64_LIR_x64_h
+#define jit_x64_LIR_x64_h
+
+namespace js {
+namespace jit {
+
+// Given an untyped input, guards on whether it's a specific type and returns
+// the unboxed payload.
+class LUnboxBase : public LInstructionHelper<1, 1, 0> {
+ public:
+  LUnboxBase(LNode::Opcode op, const LAllocation& input)
+      : LInstructionHelper<1, 1, 0>(op) {
+    setOperand(0, input);
+  }
+
+  static const size_t Input = 0;
+
+  MUnbox* mir() const { return mir_->toUnbox(); }
+};
+
+class LUnbox : public LUnboxBase {
+ public:
+  LIR_HEADER(Unbox)
+
+  explicit LUnbox(const LAllocation& input) : LUnboxBase(classOpcode, input) {}
+
+  const char* extraName() const { return StringFromMIRType(mir()->type()); }
+};
+
+class LUnboxFloatingPoint : public LUnboxBase {
+  MIRType type_;
+
+ public:
+  LIR_HEADER(UnboxFloatingPoint)
+
+  LUnboxFloatingPoint(const LAllocation& input, MIRType type)
+      : LUnboxBase(classOpcode, input), type_(type) {}
+
+  MIRType type() const { return type_; }
+  const char* extraName() const { return StringFromMIRType(type_); }
+};
+
+// Convert a 32-bit unsigned integer to a double.
+class LWasmUint32ToDouble : public LInstructionHelper<1, 1, 0> {
+ public:
+  LIR_HEADER(WasmUint32ToDouble)
+
+  explicit LWasmUint32ToDouble(const LAllocation& input)
+      : LInstructionHelper(classOpcode) {
+    setOperand(0, input);
+  }
+};
+
+// Convert a 32-bit unsigned integer to a float32.
+class LWasmUint32ToFloat32 : public LInstructionHelper<1, 1, 0> {
+ public:
+  LIR_HEADER(WasmUint32ToFloat32)
+
+  explicit LWasmUint32ToFloat32(const LAllocation& input)
+      : LInstructionHelper(classOpcode) {
+    setOperand(0, input);
+  }
+};
+
+class LDivOrModI64 : public LBinaryMath<1> {
+ public:
+  LIR_HEADER(DivOrModI64)
+
+  LDivOrModI64(const LAllocation& lhs, const LAllocation& rhs,
+               const LDefinition& temp)
+      : LBinaryMath(classOpcode) {
+    setOperand(0, lhs);
+    setOperand(1, rhs);
+    setTemp(0, temp);
+  }
+
+  const LDefinition* remainder() { return getTemp(0); }
+
+  MBinaryArithInstruction* mir() const {
+    MOZ_ASSERT(mir_->isDiv() || mir_->isMod());
+    return static_cast<MBinaryArithInstruction*>(mir_);
+  }
+  bool canBeDivideByZero() const {
+    if (mir_->isMod()) {
+      return mir_->toMod()->canBeDivideByZero();
+    }
+    return mir_->toDiv()->canBeDivideByZero();
+  }
+  bool canBeNegativeOverflow() const {
+    if (mir_->isMod()) {
+      return mir_->toMod()->canBeNegativeDividend();
+    }
+    return mir_->toDiv()->canBeNegativeOverflow();
+  }
+  wasm::BytecodeOffset bytecodeOffset() const {
+    MOZ_ASSERT(mir_->isDiv() || mir_->isMod());
+    if (mir_->isMod()) {
+      return mir_->toMod()->bytecodeOffset();
+    }
+    return mir_->toDiv()->bytecodeOffset();
+  }
+};
+
+// This class performs a simple x86 'div', yielding either a quotient or
+// remainder depending on whether this instruction is defined to output
+// rax (quotient) or rdx (remainder).
+class LUDivOrModI64 : public LBinaryMath<1> {
+ public:
+  LIR_HEADER(UDivOrModI64);
+
+  LUDivOrModI64(const LAllocation& lhs, const LAllocation& rhs,
+                const LDefinition& temp)
+      : LBinaryMath(classOpcode) {
+    setOperand(0, lhs);
+    setOperand(1, rhs);
+    setTemp(0, temp);
+  }
+
+  const LDefinition* remainder() { return getTemp(0); }
+
+  const char* extraName() const {
+    return mir()->isTruncated() ? "Truncated" : nullptr;
+  }
+
+  MBinaryArithInstruction* mir() const {
+    MOZ_ASSERT(mir_->isDiv() || mir_->isMod());
+    return static_cast<MBinaryArithInstruction*>(mir_);
+  }
+
+  bool canBeDivideByZero() const {
+    if (mir_->isMod()) {
+      return mir_->toMod()->canBeDivideByZero();
+    }
+    return mir_->toDiv()->canBeDivideByZero();
+  }
+
+  wasm::BytecodeOffset bytecodeOffset() const {
+    MOZ_ASSERT(mir_->isDiv() || mir_->isMod());
+    if (mir_->isMod()) {
+      return mir_->toMod()->bytecodeOffset();
+    }
+    return mir_->toDiv()->bytecodeOffset();
+  }
+};
+
+class LWasmTruncateToInt64 : public LInstructionHelper<1, 1, 1> {
+ public:
+  LIR_HEADER(WasmTruncateToInt64);
+
+  LWasmTruncateToInt64(const LAllocation& in, const LDefinition& temp)
+      : LInstructionHelper(classOpcode) {
+    setOperand(0, in);
+    setTemp(0, temp);
+  }
+
+  MWasmTruncateToInt64* mir() const { return mir_->toWasmTruncateToInt64(); }
+
+  const LDefinition* temp() { return getTemp(0); }
+};
+
+}  // namespace jit
+}  // namespace js
+
+#endif /* jit_x64_LIR_x64_h */