1 files changed, 74 insertions, 0 deletions
diff --git a/js/src/jit/x86-shared/MoveEmitter-x86-shared.h b/js/src/jit/x86-shared/MoveEmitter-x86-shared.h
new file mode 100644
index 000000000..6602206f2
--- /dev/null
+++ b/js/src/jit/x86-shared/MoveEmitter-x86-shared.h
@@ -0,0 +1,74 @@
+/* -*- 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_MoveEmitter_x86_shared_h
+#define jit_MoveEmitter_x86_shared_h
+
+#include "jit/MacroAssembler.h"
+#include "jit/MoveResolver.h"
+
+namespace js {
+namespace jit {
+
+class MoveEmitterX86
+{
+    bool inCycle_;
+    MacroAssembler& masm;
+
+    // Original stack push value.
+    uint32_t pushedAtStart_;
+
+    // This is a store stack offset for the cycle-break spill slot, snapshotting
+    // codegen->framePushed_ at the time it is allocated. -1 if not allocated.
+    int32_t pushedAtCycle_;
+
+#ifdef JS_CODEGEN_X86
+    // Optional scratch register for performing moves.
+    mozilla::Maybe<Register> scratchRegister_;
+#endif
+
+    void assertDone();
+    Address cycleSlot();
+    Address toAddress(const MoveOperand& operand) const;
+    Operand toOperand(const MoveOperand& operand) const;
+    Operand toPopOperand(const MoveOperand& operand) const;
+
+    size_t characterizeCycle(const MoveResolver& moves, size_t i,
+                             bool* allGeneralRegs, bool* allFloatRegs);
+    bool maybeEmitOptimizedCycle(const MoveResolver& moves, size_t i,
+                                 bool allGeneralRegs, bool allFloatRegs, size_t swapCount);
+    void emitInt32Move(const MoveOperand& from, const MoveOperand& to,
+                       const MoveResolver& moves, size_t i);
+    void emitGeneralMove(const MoveOperand& from, const MoveOperand& to,
+                         const MoveResolver& moves, size_t i);
+    void emitFloat32Move(const MoveOperand& from, const MoveOperand& to);
+    void emitDoubleMove(const MoveOperand& from, const MoveOperand& to);
+    void emitSimd128FloatMove(const MoveOperand& from, const MoveOperand& to);
+    void emitSimd128IntMove(const MoveOperand& from, const MoveOperand& to);
+    void breakCycle(const MoveOperand& to, MoveOp::Type type);
+    void completeCycle(const MoveOperand& to, MoveOp::Type type);
+
+  public:
+    explicit MoveEmitterX86(MacroAssembler& masm);
+    ~MoveEmitterX86();
+    void emit(const MoveResolver& moves);
+    void finish();
+
+    void setScratchRegister(Register reg) {
+#ifdef JS_CODEGEN_X86
+        scratchRegister_.emplace(reg);
+#endif
+    }
+
+    mozilla::Maybe<Register> findScratchRegister(const MoveResolver& moves, size_t i);
+};
+
+typedef MoveEmitterX86 MoveEmitter;
+
+} // namespace jit
+} // namespace js
+
+#endif /* jit_MoveEmitter_x86_shared_h */