JavaScriptCore-7600.1.4.9.tar.gz

[apple/javascriptcore.git] / ftl / FTLValueFormat.cpp

diff --git a/ftl/FTLValueFormat.cpp b/ftl/FTLValueFormat.cpp
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+/*
+ * Copyright (C) 2013, 2014 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 "FTLValueFormat.h"
+
+#if ENABLE(FTL_JIT)
+
+#include "AssemblyHelpers.h"
+
+namespace JSC { namespace FTL {
+
+void reboxAccordingToFormat(
+    ValueFormat format, AssemblyHelpers& jit, GPRReg value, GPRReg scratch1, GPRReg scratch2)
+{
+    switch (format) {
+    case ValueFormatInt32: {
+        jit.zeroExtend32ToPtr(value, value);
+        jit.or64(GPRInfo::tagTypeNumberRegister, value);
+        break;
+    }
+    
+    case ValueFormatInt52: {
+        jit.rshift64(AssemblyHelpers::TrustedImm32(JSValue::int52ShiftAmount), value);
+        jit.moveDoubleTo64(FPRInfo::fpRegT0, scratch2);
+        jit.boxInt52(value, value, scratch1, FPRInfo::fpRegT0);
+        jit.move64ToDouble(scratch2, FPRInfo::fpRegT0);
+        break;
+    }
+    
+    case ValueFormatStrictInt52: {
+        jit.moveDoubleTo64(FPRInfo::fpRegT0, scratch2);
+        jit.boxInt52(value, value, scratch1, FPRInfo::fpRegT0);
+        jit.move64ToDouble(scratch2, FPRInfo::fpRegT0);
+        break;
+    }
+    
+    case ValueFormatBoolean: {
+        jit.zeroExtend32ToPtr(value, value);
+        jit.or32(MacroAssembler::TrustedImm32(ValueFalse), value);
+        break;
+    }
+    
+    case ValueFormatJSValue: {
+        // Done already!
+        break;
+    }
+    
+    case ValueFormatDouble: {
+        jit.moveDoubleTo64(FPRInfo::fpRegT0, scratch1);
+        jit.move64ToDouble(value, FPRInfo::fpRegT0);
+        jit.purifyNaN(FPRInfo::fpRegT0);
+        jit.boxDouble(FPRInfo::fpRegT0, value);
+        jit.move64ToDouble(scratch1, FPRInfo::fpRegT0);
+        break;
+    }
+    
+    default:
+        RELEASE_ASSERT_NOT_REACHED();
+        break;
+    }
+}
+
+} } // namespace JSC::FTL
+
+namespace WTF {
+
+using namespace JSC::FTL;
+
+void printInternal(PrintStream& out, ValueFormat format)
+{
+    switch (format) {
+    case InvalidValueFormat:
+        out.print("Invalid");
+        return;
+    case ValueFormatInt32:
+        out.print("Int32");
+        return;
+    case ValueFormatInt52:
+        out.print("Int52");
+        return;
+    case ValueFormatStrictInt52:
+        out.print("StrictInt52");
+        return;
+    case ValueFormatBoolean:
+        out.print("Boolean");
+        return;
+    case ValueFormatJSValue:
+        out.print("JSValue");
+        return;
+    case ValueFormatDouble:
+        out.print("Double");
+        return;
+    }
+    
+    RELEASE_ASSERT_NOT_REACHED();
+}
+
+} // namespace WTF
+
+#endif // ENABLE(FTL_JIT)
+