webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

1 files changed, 127 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/b3/air/AirCCallingConvention.cpp b/Source/JavaScriptCore/b3/air/AirCCallingConvention.cpp
new file mode 100644
index 000000000..2b6f733bf
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+++ b/Source/JavaScriptCore/b3/air/AirCCallingConvention.cpp
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+/*
+ * Copyright (C) 2016 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ */
+
+#include "config.h"
+#include "AirCCallingConvention.h"
+
+#if ENABLE(B3_JIT)
+
+#include "AirCCallSpecial.h"
+#include "AirCode.h"
+#include "B3CCallValue.h"
+#include "B3ValueInlines.h"
+
+namespace JSC { namespace B3 { namespace Air {
+
+namespace {
+
+template<typename BankInfo>
+Arg marshallCCallArgumentImpl(unsigned& argumentCount, unsigned& stackOffset, Value* child)
+{
+    unsigned argumentIndex = argumentCount++;
+    if (argumentIndex < BankInfo::numberOfArgumentRegisters)
+        return Tmp(BankInfo::toArgumentRegister(argumentIndex));
+
+    unsigned slotSize;
+    if (isARM64() && isIOS()) {
+        // Arguments are packed.
+        slotSize = sizeofType(child->type());
+    } else {
+        // Arguments are aligned.
+        slotSize = 8;
+    }
+
+    stackOffset = WTF::roundUpToMultipleOf(slotSize, stackOffset);
+    Arg result = Arg::callArg(stackOffset);
+    stackOffset += slotSize;
+    return result;
+}
+
+Arg marshallCCallArgument(
+    unsigned& gpArgumentCount, unsigned& fpArgumentCount, unsigned& stackOffset, Value* child)
+{
+    switch (Arg::typeForB3Type(child->type())) {
+    case Arg::GP:
+        return marshallCCallArgumentImpl<GPRInfo>(gpArgumentCount, stackOffset, child);
+    case Arg::FP:
+        return marshallCCallArgumentImpl<FPRInfo>(fpArgumentCount, stackOffset, child);
+    }
+    RELEASE_ASSERT_NOT_REACHED();
+    return Arg();
+}
+
+} // anonymous namespace
+
+Vector<Arg> computeCCallingConvention(Code& code, CCallValue* value)
+{
+    Vector<Arg> result;
+    result.append(Tmp(CCallSpecial::scratchRegister));
+    unsigned gpArgumentCount = 0;
+    unsigned fpArgumentCount = 0;
+    unsigned stackOffset = 0;
+    for (unsigned i = 1; i < value->numChildren(); ++i) {
+        result.append(
+            marshallCCallArgument(gpArgumentCount, fpArgumentCount, stackOffset, value->child(i)));
+    }
+    code.requestCallArgAreaSizeInBytes(WTF::roundUpToMultipleOf(stackAlignmentBytes(), stackOffset));
+    return result;
+}
+
+Tmp cCallResult(Type type)
+{
+    switch (type) {
+    case Void:
+        return Tmp();
+    case Int32:
+    case Int64:
+        return Tmp(GPRInfo::returnValueGPR);
+    case Float:
+    case Double:
+        return Tmp(FPRInfo::returnValueFPR);
+    }
+
+    RELEASE_ASSERT_NOT_REACHED();
+    return Tmp();
+}
+
+Inst buildCCall(Code& code, Value* origin, const Vector<Arg>& arguments)
+{
+    Inst inst(Patch, origin, Arg::special(code.cCallSpecial()));
+    inst.args.append(arguments[0]);
+    inst.args.append(Tmp(GPRInfo::returnValueGPR));
+    inst.args.append(Tmp(GPRInfo::returnValueGPR2));
+    inst.args.append(Tmp(FPRInfo::returnValueFPR));
+    for (unsigned i = 1; i < arguments.size(); ++i) {
+        Arg arg = arguments[i];
+        if (arg.isTmp())
+            inst.args.append(arg);
+    }
+    return inst;
+}
+
+} } } // namespace JSC::B3::Air
+
+#endif // ENABLE(B3_JIT)
+