gecko/js/src/methodjit/nunbox/FastOps.cpp

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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 * ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Mozilla SpiderMonkey JavaScript 1.9 code, released
 * May 28, 2008.
 *
 * The Initial Developer of the Original Code is
 *   Brendan Eich <brendan@mozilla.org>
 *
 * Contributor(s):
 *   David Anderson <danderson@mozilla.com>
 *   David Mandelin <dmandelin@mozilla.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
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 * ***** END LICENSE BLOCK ***** */
#include "methodjit/MethodJIT.h"
#include "methodjit/Compiler.h"
#include "methodjit/StubCalls.h"
#include "methodjit/FrameState-inl.h"

#include "jsautooplen.h"

using namespace js;
using namespace js::mjit;

void
mjit::Compiler::jsop_bindname(uint32 index)
{
    RegisterID reg = frame.allocReg();
    masm.loadPtr(Address(Assembler::FpReg, offsetof(JSStackFrame, scopeChain)), reg);

    Address address(reg, offsetof(JSObject, fslots) + JSSLOT_PARENT * sizeof(jsval));

    Jump j = masm.branch32(Assembler::NotEqual, masm.payloadOf(address), Imm32(0));

    stubcc.linkExit(j);
    stubcc.leave();
    stubcc.call(stubs::BindName);

    frame.pushTypedPayload(JSVAL_MASK32_NONFUNOBJ, reg);

    stubcc.rejoin(1);
}

void
mjit::Compiler::jsop_bitop(JSOp op)
{
    FrameEntry *rhs = frame.peek(-1);
    FrameEntry *lhs = frame.peek(-2);

    /* We only want to handle integers here. */
    if ((rhs->isTypeKnown() && rhs->getTypeTag() != JSVAL_MASK32_INT32) ||
        (lhs->isTypeKnown() && lhs->getTypeTag() != JSVAL_MASK32_INT32)) {
        prepareStubCall();
        stubCall(stubs::BitAnd, Uses(2), Defs(1));
        frame.popn(2);
        frame.pushSyncedType(JSVAL_MASK32_INT32);
        return;
    }
           
    /* Test the types. */
    if (!rhs->isTypeKnown()) {
        RegisterID reg = frame.tempRegForType(rhs);
        Jump rhsFail = masm.branch32(Assembler::NotEqual, reg, Imm32(JSVAL_MASK32_INT32));
        stubcc.linkExit(rhsFail);
        if (lhs->isTypeKnown())
            stubcc.leave();
        frame.freeReg(reg);
        //rhs->setTypeTag(JSVAL_MASK32_INT32);
    }
    if (!lhs->isTypeKnown()) {
        RegisterID reg = frame.tempRegForType(lhs);
        Jump lhsFail = masm.branch32(Assembler::NotEqual, reg, Imm32(JSVAL_MASK32_INT32));
        stubcc.linkExit(lhsFail);
        stubcc.leave();
        frame.freeReg(reg);
    }

    stubcc.call(stubs::BitAnd);

    frame.pop();
    frame.pop();
}