1 files changed, 96 insertions, 0 deletions
diff --git a/js/src/jit/x86/Lowering-x86.h b/js/src/jit/x86/Lowering-x86.h
new file mode 100644
index 000000000..af823bad2
--- /dev/null
+++ b/js/src/jit/x86/Lowering-x86.h
@@ -0,0 +1,96 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ * vim: set ts=8 sts=4 et sw=4 tw=99:
+ * 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_x86_Lowering_x86_h
+#define jit_x86_Lowering_x86_h
+
+#include "jit/x86-shared/Lowering-x86-shared.h"
+
+namespace js {
+namespace jit {
+
+class LIRGeneratorX86 : public LIRGeneratorX86Shared
+{
+  public:
+    LIRGeneratorX86(MIRGenerator* gen, MIRGraph& graph, LIRGraph& lirGraph)
+      : LIRGeneratorX86Shared(gen, graph, lirGraph)
+    { }
+
+  protected:
+    // Returns a box allocation with type set to reg1 and payload set to reg2.
+    LBoxAllocation useBoxFixed(MDefinition* mir, Register reg1, Register reg2,
+                               bool useAtStart = false);
+
+    // It's a trap! On x86, the 1-byte store can only use one of
+    // {al,bl,cl,dl,ah,bh,ch,dh}. That means if the register allocator
+    // gives us one of {edi,esi,ebp,esp}, we're out of luck. (The formatter
+    // will assert on us.) Ideally, we'd just ask the register allocator to
+    // give us one of {al,bl,cl,dl}. For now, just useFixed(al).
+    LAllocation useByteOpRegister(MDefinition* mir);
+    LAllocation useByteOpRegisterAtStart(MDefinition* mir);
+    LAllocation useByteOpRegisterOrNonDoubleConstant(MDefinition* mir);
+    LDefinition tempByteOpRegister();
+
+    inline LDefinition tempToUnbox() {
+        return LDefinition::BogusTemp();
+    }
+
+    bool needTempForPostBarrier() { return true; }
+
+    void lowerUntypedPhiInput(MPhi* phi, uint32_t inputPosition, LBlock* block, size_t lirIndex);
+    void defineUntypedPhi(MPhi* phi, size_t lirIndex);
+
+    void lowerInt64PhiInput(MPhi* phi, uint32_t inputPosition, LBlock* block, size_t lirIndex);
+    void defineInt64Phi(MPhi* phi, size_t lirIndex);
+
+    void lowerForALUInt64(LInstructionHelper<INT64_PIECES, 2 * INT64_PIECES, 0>* ins,
+                          MDefinition* mir, MDefinition* lhs, MDefinition* rhs);
+    void lowerForMulInt64(LMulI64* ins, MMul* mir, MDefinition* lhs, MDefinition* rhs);
+
+    void lowerDivI64(MDiv* div);
+    void lowerModI64(MMod* mod);
+    void lowerUDivI64(MDiv* div);
+    void lowerUModI64(MMod* mod);
+
+  public:
+    void visitBox(MBox* box);
+    void visitUnbox(MUnbox* unbox);
+    void visitReturn(MReturn* ret);
+    void visitCompareExchangeTypedArrayElement(MCompareExchangeTypedArrayElement* ins);
+    void visitAtomicExchangeTypedArrayElement(MAtomicExchangeTypedArrayElement* ins);
+    void visitAtomicTypedArrayElementBinop(MAtomicTypedArrayElementBinop* ins);
+    void visitWasmUnsignedToDouble(MWasmUnsignedToDouble* ins);
+    void visitWasmUnsignedToFloat32(MWasmUnsignedToFloat32* ins);
+    void visitAsmJSLoadHeap(MAsmJSLoadHeap* ins);
+    void visitAsmJSStoreHeap(MAsmJSStoreHeap* ins);
+    void visitAsmJSCompareExchangeHeap(MAsmJSCompareExchangeHeap* ins);
+    void visitAsmJSAtomicExchangeHeap(MAsmJSAtomicExchangeHeap* ins);
+    void visitAsmJSAtomicBinopHeap(MAsmJSAtomicBinopHeap* ins);
+    void visitWasmLoad(MWasmLoad* ins);
+    void visitWasmStore(MWasmStore* ins);
+    void visitStoreTypedArrayElementStatic(MStoreTypedArrayElementStatic* ins);
+    void visitSubstr(MSubstr* ins);
+    void visitRandom(MRandom* ins);
+    void visitWasmTruncateToInt64(MWasmTruncateToInt64* ins);
+    void visitInt64ToFloatingPoint(MInt64ToFloatingPoint* ins);
+    void visitExtendInt32ToInt64(MExtendInt32ToInt64* ins);
+    void lowerPhi(MPhi* phi);
+
+    static bool allowTypedElementHoleCheck() {
+        return true;
+    }
+
+    static bool allowStaticTypedArrayAccesses() {
+        return true;
+    }
+};
+
+typedef LIRGeneratorX86 LIRGeneratorSpecific;
+
+} // namespace jit
+} // namespace js
+
+#endif /* jit_x86_Lowering_x86_h */