Source/JavaScriptCore/ftl/FTLCArgumentGetter.cpp

/*
 * Copyright (C) 2013 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 "FTLCArgumentGetter.h"

#if ENABLE(FTL_JIT)

namespace JSC { namespace FTL {

using namespace DFG;

void CArgumentGetter::loadNextAndBox(
    ValueFormat format, GPRReg destination, GPRReg scratch1, GPRReg scratch2)
{
    if (scratch1 == InvalidGPRReg) {
        ASSERT(scratch2 == InvalidGPRReg);
        if (destination == GPRInfo::nonArgGPR0)
            scratch1 = GPRInfo::nonArgGPR1;
        else
            scratch1 = GPRInfo::nonArgGPR0;
    }
    if (scratch2 == InvalidGPRReg) {
        if (destination != GPRInfo::nonArgGPR0 && scratch1 != GPRInfo::nonArgGPR0)
            scratch2 = GPRInfo::nonArgGPR0;
        else if (destination != GPRInfo::nonArgGPR1 && scratch1 != GPRInfo::nonArgGPR1)
            scratch2 = GPRInfo::nonArgGPR1;
        else
            scratch2 = GPRInfo::nonArgGPR2;
    }
    
    switch (format) {
    case ValueFormatInt32:
    case ValueFormatUInt32:
        loadNext32(destination);
        break;
        
    case ValueFormatInt52:
    case ValueFormatStrictInt52:
    case ValueFormatJSValue:
        loadNext64(destination);
        break;
            
    case ValueFormatBoolean:
        loadNext8(destination);
        break;
            
    case ValueFormatDouble:
        loadNextDoubleIntoGPR(destination);
        break;
            
    default:
        RELEASE_ASSERT_NOT_REACHED();
        break;
    }
    
    reboxAccordingToFormat(format, m_jit, destination, scratch1, scratch2);
}

} } // namespace JSC::FTL

#endif // ENABLE(FTL_JIT)