1 files changed, 149 insertions, 0 deletions
diff --git a/js/src/jit/mips64/MoveEmitter-mips64.cpp b/js/src/jit/mips64/MoveEmitter-mips64.cpp
new file mode 100644
index 0000000000..70217a37f8
--- /dev/null
+++ b/js/src/jit/mips64/MoveEmitter-mips64.cpp
@@ -0,0 +1,149 @@
+/* -*- 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/. */
+
+#include "jit/mips64/MoveEmitter-mips64.h"
+
+#include "jit/MacroAssembler-inl.h"
+
+using namespace js;
+using namespace js::jit;
+
+void MoveEmitterMIPS64::breakCycle(const MoveOperand& from,
+                                   const MoveOperand& to, MoveOp::Type type,
+                                   uint32_t slotId) {
+  // There is some pattern:
+  //   (A -> B)
+  //   (B -> A)
+  //
+  // This case handles (A -> B), which we reach first. We save B, then allow
+  // the original move to continue.
+  switch (type) {
+    case MoveOp::FLOAT32:
+      if (to.isMemory()) {
+        FloatRegister temp = ScratchFloat32Reg;
+        masm.loadFloat32(getAdjustedAddress(to), temp);
+        masm.storeFloat32(temp, cycleSlot(slotId));
+      } else {
+        masm.storeFloat32(to.floatReg(), cycleSlot(slotId));
+      }
+      break;
+    case MoveOp::DOUBLE:
+      if (to.isMemory()) {
+        FloatRegister temp = ScratchDoubleReg;
+        masm.loadDouble(getAdjustedAddress(to), temp);
+        masm.storeDouble(temp, cycleSlot(slotId));
+      } else {
+        masm.storeDouble(to.floatReg(), cycleSlot(slotId));
+      }
+      break;
+    case MoveOp::INT32:
+      if (to.isMemory()) {
+        Register temp = tempReg();
+        masm.load32(getAdjustedAddress(to), temp);
+        masm.store32(temp, cycleSlot(0));
+      } else {
+        // Second scratch register should not be moved by MoveEmitter.
+        MOZ_ASSERT(to.reg() != spilledReg_);
+        masm.store32(to.reg(), cycleSlot(0));
+      }
+      break;
+    case MoveOp::GENERAL:
+      if (to.isMemory()) {
+        Register temp = tempReg();
+        masm.loadPtr(getAdjustedAddress(to), temp);
+        masm.storePtr(temp, cycleSlot(0));
+      } else {
+        // Second scratch register should not be moved by MoveEmitter.
+        MOZ_ASSERT(to.reg() != spilledReg_);
+        masm.storePtr(to.reg(), cycleSlot(0));
+      }
+      break;
+    default:
+      MOZ_CRASH("Unexpected move type");
+  }
+}
+
+void MoveEmitterMIPS64::completeCycle(const MoveOperand& from,
+                                      const MoveOperand& to, MoveOp::Type type,
+                                      uint32_t slotId) {
+  // There is some pattern:
+  //   (A -> B)
+  //   (B -> A)
+  //
+  // This case handles (B -> A), which we reach last. We emit a move from the
+  // saved value of B, to A.
+  switch (type) {
+    case MoveOp::FLOAT32:
+      if (to.isMemory()) {
+        FloatRegister temp = ScratchFloat32Reg;
+        masm.loadFloat32(cycleSlot(slotId), temp);
+        masm.storeFloat32(temp, getAdjustedAddress(to));
+      } else {
+        masm.loadFloat32(cycleSlot(slotId), to.floatReg());
+      }
+      break;
+    case MoveOp::DOUBLE:
+      if (to.isMemory()) {
+        FloatRegister temp = ScratchDoubleReg;
+        masm.loadDouble(cycleSlot(slotId), temp);
+        masm.storeDouble(temp, getAdjustedAddress(to));
+      } else {
+        masm.loadDouble(cycleSlot(slotId), to.floatReg());
+      }
+      break;
+    case MoveOp::INT32:
+      MOZ_ASSERT(slotId == 0);
+      if (to.isMemory()) {
+        Register temp = tempReg();
+        masm.load32(cycleSlot(0), temp);
+        masm.store32(temp, getAdjustedAddress(to));
+      } else {
+        // Second scratch register should not be moved by MoveEmitter.
+        MOZ_ASSERT(to.reg() != spilledReg_);
+        masm.load32(cycleSlot(0), to.reg());
+      }
+      break;
+    case MoveOp::GENERAL:
+      MOZ_ASSERT(slotId == 0);
+      if (to.isMemory()) {
+        Register temp = tempReg();
+        masm.loadPtr(cycleSlot(0), temp);
+        masm.storePtr(temp, getAdjustedAddress(to));
+      } else {
+        // Second scratch register should not be moved by MoveEmitter.
+        MOZ_ASSERT(to.reg() != spilledReg_);
+        masm.loadPtr(cycleSlot(0), to.reg());
+      }
+      break;
+    default:
+      MOZ_CRASH("Unexpected move type");
+  }
+}
+
+void MoveEmitterMIPS64::emitDoubleMove(const MoveOperand& from,
+                                       const MoveOperand& to) {
+  if (from.isFloatReg()) {
+    if (to.isFloatReg()) {
+      masm.moveDouble(from.floatReg(), to.floatReg());
+    } else if (to.isGeneralReg()) {
+      masm.moveFromDouble(from.floatReg(), to.reg());
+    } else {
+      MOZ_ASSERT(to.isMemory());
+      masm.storeDouble(from.floatReg(), getAdjustedAddress(to));
+    }
+  } else if (to.isFloatReg()) {
+    if (from.isMemory()) {
+      masm.loadDouble(getAdjustedAddress(from), to.floatReg());
+    } else {
+      masm.moveToDouble(from.reg(), to.floatReg());
+    }
+  } else {
+    MOZ_ASSERT(from.isMemory());
+    MOZ_ASSERT(to.isMemory());
+    masm.loadDouble(getAdjustedAddress(from), ScratchDoubleReg);
+    masm.storeDouble(ScratchDoubleReg, getAdjustedAddress(to));
+  }
+}