Add m-esr52 at 52.6.0

1 files changed, 44 insertions, 0 deletions

diff --git a/js/src/jit/x86-shared/BaselineIC-x86-shared.cpp b/js/src/jit/x86-shared/BaselineIC-x86-shared.cpp
new file mode 100644
index 000000000..4e25f87bf
--- /dev/null
+++ b/js/src/jit/x86-shared/BaselineIC-x86-shared.cpp
@@ -0,0 +1,44 @@
+/* -*- 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/BaselineIC.h"
+#include "jit/SharedICHelpers.h"
+
+#include "jit/MacroAssembler-inl.h"
+
+using namespace js;
+using namespace js::jit;
+
+bool
+ICCompare_Double::Compiler::generateStubCode(MacroAssembler& masm)
+{
+    Label failure, notNaN;
+    masm.ensureDouble(R0, FloatReg0, &failure);
+    masm.ensureDouble(R1, FloatReg1, &failure);
+
+    Register dest = R0.scratchReg();
+
+    Assembler::DoubleCondition cond = JSOpToDoubleCondition(op);
+    masm.mov(ImmWord(0), dest);
+    masm.compareDouble(cond, FloatReg0, FloatReg1);
+    masm.setCC(Assembler::ConditionFromDoubleCondition(cond), dest);
+
+    // Check for NaN, if needed.
+    Assembler::NaNCond nanCond = Assembler::NaNCondFromDoubleCondition(cond);
+    if (nanCond != Assembler::NaN_HandledByCond) {
+      masm.j(Assembler::NoParity, &notNaN);
+      masm.mov(ImmWord(nanCond == Assembler::NaN_IsTrue), dest);
+      masm.bind(&notNaN);
+    }
+
+    masm.tagValue(JSVAL_TYPE_BOOLEAN, dest, R0);
+    EmitReturnFromIC(masm);
+
+    // Failure case - jump to next stub
+    masm.bind(&failure);
+    EmitStubGuardFailure(masm);
+    return true;
+}