Add m-esr52 at 52.6.0

1 files changed, 156 insertions, 0 deletions

diff --git a/js/src/jit/mips32/MoveEmitter-mips32.cpp b/js/src/jit/mips32/MoveEmitter-mips32.cpp
new file mode 100644
index 000000000..7b5a8996f
--- /dev/null
+++ b/js/src/jit/mips32/MoveEmitter-mips32.cpp
@@ -0,0 +1,156 @@
+/* -*- 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/. */
+
+#include "jit/mips32/MoveEmitter-mips32.h"
+
+#include "jit/MacroAssembler-inl.h"
+
+using namespace js;
+using namespace js::jit;
+
+void
+MoveEmitterMIPS::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);
+            // Since it is uncertain if the load will be aligned or not
+            // just fill both of them with the same value.
+            masm.storeFloat32(temp, cycleSlot(slotId, 0));
+            masm.storeFloat32(temp, cycleSlot(slotId, 4));
+        } else {
+            // Just always store the largest possible size.
+            masm.storeDouble(to.floatReg().doubleOverlay(), cycleSlot(slotId, 0));
+        }
+        break;
+      case MoveOp::DOUBLE:
+        if (to.isMemory()) {
+            FloatRegister temp = ScratchDoubleReg;
+            masm.loadDouble(getAdjustedAddress(to), temp);
+            masm.storeDouble(temp, cycleSlot(slotId, 0));
+        } else {
+            masm.storeDouble(to.floatReg(), cycleSlot(slotId, 0));
+        }
+        break;
+      case MoveOp::INT32:
+        MOZ_ASSERT(sizeof(uintptr_t) == sizeof(int32_t));
+      case MoveOp::GENERAL:
+        if (to.isMemory()) {
+            Register temp = tempReg();
+            masm.loadPtr(getAdjustedAddress(to), temp);
+            masm.storePtr(temp, cycleSlot(0, 0));
+        } else {
+            // Second scratch register should not be moved by MoveEmitter.
+            MOZ_ASSERT(to.reg() != spilledReg_);
+            masm.storePtr(to.reg(), cycleSlot(0, 0));
+        }
+        break;
+      default:
+        MOZ_CRASH("Unexpected move type");
+    }
+}
+
+void
+MoveEmitterMIPS::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, 0), temp);
+            masm.storeFloat32(temp, getAdjustedAddress(to));
+        } else {
+            uint32_t offset = 0;
+            if (from.floatReg().numAlignedAliased() == 1)
+                offset = sizeof(float);
+            masm.loadFloat32(cycleSlot(slotId, offset), to.floatReg());
+        }
+        break;
+      case MoveOp::DOUBLE:
+        if (to.isMemory()) {
+            FloatRegister temp = ScratchDoubleReg;
+            masm.loadDouble(cycleSlot(slotId, 0), temp);
+            masm.storeDouble(temp, getAdjustedAddress(to));
+        } else {
+            masm.loadDouble(cycleSlot(slotId, 0), to.floatReg());
+        }
+        break;
+      case MoveOp::INT32:
+        MOZ_ASSERT(sizeof(uintptr_t) == sizeof(int32_t));
+      case MoveOp::GENERAL:
+        MOZ_ASSERT(slotId == 0);
+        if (to.isMemory()) {
+            Register temp = tempReg();
+            masm.loadPtr(cycleSlot(0, 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, 0), to.reg());
+        }
+        break;
+      default:
+        MOZ_CRASH("Unexpected move type");
+    }
+}
+
+void
+MoveEmitterMIPS::emitDoubleMove(const MoveOperand& from, const MoveOperand& to)
+{
+    // Ensure that we can use ScratchDoubleReg in memory move.
+    MOZ_ASSERT_IF(from.isFloatReg(), from.floatReg() != ScratchDoubleReg);
+    MOZ_ASSERT_IF(to.isFloatReg(), to.floatReg() != ScratchDoubleReg);
+
+    if (from.isFloatReg()) {
+        if (to.isFloatReg()) {
+            masm.moveDouble(from.floatReg(), to.floatReg());
+        } else if (to.isGeneralRegPair()) {
+            // Used for passing double parameter in a2,a3 register pair.
+            // Two moves are added for one double parameter by
+            // MacroAssembler::passABIArg
+            MOZ_ASSERT(to.evenReg() == a2 && to.oddReg() == a3,
+                       "Invalid emitDoubleMove arguments.");
+            masm.moveFromDoubleLo(from.floatReg(), a2);
+            masm.moveFromDoubleHi(from.floatReg(), a3);
+        } else {
+            MOZ_ASSERT(to.isMemory());
+            masm.storeDouble(from.floatReg(), getAdjustedAddress(to));
+        }
+    } else if (to.isFloatReg()) {
+        MOZ_ASSERT(from.isMemory());
+        masm.loadDouble(getAdjustedAddress(from), to.floatReg());
+    } else if (to.isGeneralRegPair()) {
+        // Used for passing double parameter in a2,a3 register pair.
+        // Two moves are added for one double parameter by
+        // MacroAssembler::passABIArg
+        MOZ_ASSERT(from.isMemory());
+        MOZ_ASSERT(to.evenReg() == a2 && to.oddReg() == a3,
+                   "Invalid emitDoubleMove arguments.");
+        masm.loadPtr(getAdjustedAddress(from), a2);
+        masm.loadPtr(Address(from.base(), getAdjustedOffset(from) + sizeof(uint32_t)), a3);
+    } else {
+        MOZ_ASSERT(from.isMemory());
+        MOZ_ASSERT(to.isMemory());
+        masm.loadDouble(getAdjustedAddress(from), ScratchDoubleReg);
+        masm.storeDouble(ScratchDoubleReg, getAdjustedAddress(to));
+    }
+}