Imported WebKit commit 2ea9d364d0f6efa8fa64acf19f451504c59be0e4 (http://svn.webkit.org/repository/webkit/trunk@104285)

1 files changed, 1061 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/assembler/MacroAssemblerARM.h b/Source/JavaScriptCore/assembler/MacroAssemblerARM.h
new file mode 100644
index 000000000..51173895a
--- /dev/null
+++ b/Source/JavaScriptCore/assembler/MacroAssemblerARM.h
@@ -0,0 +1,1061 @@
+/*
+ * Copyright (C) 2008 Apple Inc.
+ * Copyright (C) 2009, 2010 University of Szeged
+ * 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.
+ */
+
+#ifndef MacroAssemblerARM_h
+#define MacroAssemblerARM_h
+
+#if ENABLE(ASSEMBLER) && CPU(ARM_TRADITIONAL)
+
+#include "ARMAssembler.h"
+#include "AbstractMacroAssembler.h"
+
+namespace JSC {
+
+class MacroAssemblerARM : public AbstractMacroAssembler<ARMAssembler> {
+    static const int DoubleConditionMask = 0x0f;
+    static const int DoubleConditionBitSpecial = 0x10;
+    COMPILE_ASSERT(!(DoubleConditionBitSpecial & DoubleConditionMask), DoubleConditionBitSpecial_should_not_interfere_with_ARMAssembler_Condition_codes);
+public:
+    typedef ARMRegisters::FPRegisterID FPRegisterID;
+    static const int MaximumCompactPtrAlignedAddressOffset = 0x7FFFFFFF;
+
+    enum RelationalCondition {
+        Equal = ARMAssembler::EQ,
+        NotEqual = ARMAssembler::NE,
+        Above = ARMAssembler::HI,
+        AboveOrEqual = ARMAssembler::CS,
+        Below = ARMAssembler::CC,
+        BelowOrEqual = ARMAssembler::LS,
+        GreaterThan = ARMAssembler::GT,
+        GreaterThanOrEqual = ARMAssembler::GE,
+        LessThan = ARMAssembler::LT,
+        LessThanOrEqual = ARMAssembler::LE
+    };
+
+    enum ResultCondition {
+        Overflow = ARMAssembler::VS,
+        Signed = ARMAssembler::MI,
+        Zero = ARMAssembler::EQ,
+        NonZero = ARMAssembler::NE
+    };
+
+    enum DoubleCondition {
+        // These conditions will only evaluate to true if the comparison is ordered - i.e. neither operand is NaN.
+        DoubleEqual = ARMAssembler::EQ,
+        DoubleNotEqual = ARMAssembler::NE | DoubleConditionBitSpecial,
+        DoubleGreaterThan = ARMAssembler::GT,
+        DoubleGreaterThanOrEqual = ARMAssembler::GE,
+        DoubleLessThan = ARMAssembler::CC,
+        DoubleLessThanOrEqual = ARMAssembler::LS,
+        // If either operand is NaN, these conditions always evaluate to true.
+        DoubleEqualOrUnordered = ARMAssembler::EQ | DoubleConditionBitSpecial,
+        DoubleNotEqualOrUnordered = ARMAssembler::NE,
+        DoubleGreaterThanOrUnordered = ARMAssembler::HI,
+        DoubleGreaterThanOrEqualOrUnordered = ARMAssembler::CS,
+        DoubleLessThanOrUnordered = ARMAssembler::LT,
+        DoubleLessThanOrEqualOrUnordered = ARMAssembler::LE,
+    };
+
+    static const RegisterID stackPointerRegister = ARMRegisters::sp;
+    static const RegisterID linkRegister = ARMRegisters::lr;
+
+    static const Scale ScalePtr = TimesFour;
+
+    void add32(RegisterID src, RegisterID dest)
+    {
+        m_assembler.adds_r(dest, dest, src);
+    }
+
+    void add32(TrustedImm32 imm, Address address)
+    {
+        load32(address, ARMRegisters::S1);
+        add32(imm, ARMRegisters::S1);
+        store32(ARMRegisters::S1, address);
+    }
+
+    void add32(TrustedImm32 imm, RegisterID dest)
+    {
+        m_assembler.adds_r(dest, dest, m_assembler.getImm(imm.m_value, ARMRegisters::S0));
+    }
+
+    void add32(Address src, RegisterID dest)
+    {
+        load32(src, ARMRegisters::S1);
+        add32(ARMRegisters::S1, dest);
+    }
+
+    void and32(RegisterID src, RegisterID dest)
+    {
+        m_assembler.ands_r(dest, dest, src);
+    }
+
+    void and32(TrustedImm32 imm, RegisterID dest)
+    {
+        ARMWord w = m_assembler.getImm(imm.m_value, ARMRegisters::S0, true);
+        if (w & ARMAssembler::OP2_INV_IMM)
+            m_assembler.bics_r(dest, dest, w & ~ARMAssembler::OP2_INV_IMM);
+        else
+            m_assembler.ands_r(dest, dest, w);
+    }
+
+    void lshift32(RegisterID shift_amount, RegisterID dest)
+    {
+        ARMWord w = ARMAssembler::getOp2(0x1f);
+        ASSERT(w != ARMAssembler::INVALID_IMM);
+        m_assembler.and_r(ARMRegisters::S0, shift_amount, w);
+
+        m_assembler.movs_r(dest, m_assembler.lsl_r(dest, ARMRegisters::S0));
+    }
+
+    void lshift32(TrustedImm32 imm, RegisterID dest)
+    {
+        m_assembler.movs_r(dest, m_assembler.lsl(dest, imm.m_value & 0x1f));
+    }
+
+    void mul32(RegisterID src, RegisterID dest)
+    {
+        if (src == dest) {
+            move(src, ARMRegisters::S0);
+            src = ARMRegisters::S0;
+        }
+        m_assembler.muls_r(dest, dest, src);
+    }
+
+    void mul32(TrustedImm32 imm, RegisterID src, RegisterID dest)
+    {
+        move(imm, ARMRegisters::S0);
+        m_assembler.muls_r(dest, src, ARMRegisters::S0);
+    }
+
+    void neg32(RegisterID srcDest)
+    {
+        m_assembler.rsbs_r(srcDest, srcDest, ARMAssembler::getOp2(0));
+    }
+
+    void not32(RegisterID dest)
+    {
+        m_assembler.mvns_r(dest, dest);
+    }
+
+    void or32(RegisterID src, RegisterID dest)
+    {
+        m_assembler.orrs_r(dest, dest, src);
+    }
+
+    void or32(TrustedImm32 imm, RegisterID dest)
+    {
+        m_assembler.orrs_r(dest, dest, m_assembler.getImm(imm.m_value, ARMRegisters::S0));
+    }
+
+    void or32(RegisterID op1, RegisterID op2, RegisterID dest)
+    {
+        m_assembler.orrs_r(dest, op1, op2);
+    }
+
+    void rshift32(RegisterID shift_amount, RegisterID dest)
+    {
+        ARMWord w = ARMAssembler::getOp2(0x1f);
+        ASSERT(w != ARMAssembler::INVALID_IMM);
+        m_assembler.and_r(ARMRegisters::S0, shift_amount, w);
+
+        m_assembler.movs_r(dest, m_assembler.asr_r(dest, ARMRegisters::S0));
+    }
+    
+    void rshift32(TrustedImm32 imm, RegisterID dest)
+    {
+        rshift32(dest, imm, dest);
+    }
+
+    void rshift32(RegisterID src, TrustedImm32 imm, RegisterID dest)
+    {
+        m_assembler.movs_r(dest, m_assembler.asr(src, imm.m_value & 0x1f));
+    }
+    
+    void urshift32(RegisterID shift_amount, RegisterID dest)
+    {
+        ARMWord w = ARMAssembler::getOp2(0x1f);
+        ASSERT(w != ARMAssembler::INVALID_IMM);
+        m_assembler.and_r(ARMRegisters::S0, shift_amount, w);
+        
+        m_assembler.movs_r(dest, m_assembler.lsr_r(dest, ARMRegisters::S0));
+    }
+    
+    void urshift32(TrustedImm32 imm, RegisterID dest)
+    {
+        m_assembler.movs_r(dest, m_assembler.lsr(dest, imm.m_value & 0x1f));
+    }
+
+    void sub32(RegisterID src, RegisterID dest)
+    {
+        m_assembler.subs_r(dest, dest, src);
+    }
+
+    void sub32(TrustedImm32 imm, RegisterID dest)
+    {
+        m_assembler.subs_r(dest, dest, m_assembler.getImm(imm.m_value, ARMRegisters::S0));
+    }
+
+    void sub32(TrustedImm32 imm, Address address)
+    {
+        load32(address, ARMRegisters::S1);
+        sub32(imm, ARMRegisters::S1);
+        store32(ARMRegisters::S1, address);
+    }
+
+    void sub32(Address src, RegisterID dest)
+    {
+        load32(src, ARMRegisters::S1);
+        sub32(ARMRegisters::S1, dest);
+    }
+
+    void xor32(RegisterID src, RegisterID dest)
+    {
+        m_assembler.eors_r(dest, dest, src);
+    }
+
+    void xor32(TrustedImm32 imm, RegisterID dest)
+    {
+        m_assembler.eors_r(dest, dest, m_assembler.getImm(imm.m_value, ARMRegisters::S0));
+    }
+
+    void countLeadingZeros32(RegisterID src, RegisterID dest)
+    {
+#if WTF_ARM_ARCH_AT_LEAST(5)
+        m_assembler.clz_r(dest, src);
+#else
+        UNUSED_PARAM(src);
+        UNUSED_PARAM(dest);
+        ASSERT_NOT_REACHED();
+#endif
+    }
+
+    void load8(ImplicitAddress address, RegisterID dest)
+    {
+        m_assembler.dataTransfer32(true, dest, address.base, address.offset, true);
+    }
+
+    void load8(BaseIndex address, RegisterID dest)
+    {
+        m_assembler.baseIndexTransfer32(true, dest, address.base, address.index, static_cast<int>(address.scale), address.offset, true);
+    }
+
+    void load32(ImplicitAddress address, RegisterID dest)
+    {
+        m_assembler.dataTransfer32(true, dest, address.base, address.offset);
+    }
+
+    void load32(BaseIndex address, RegisterID dest)
+    {
+        m_assembler.baseIndexTransfer32(true, dest, address.base, address.index, static_cast<int>(address.scale), address.offset);
+    }
+
+#if CPU(ARMV5_OR_LOWER)
+    void load32WithUnalignedHalfWords(BaseIndex address, RegisterID dest);
+#else
+    void load32WithUnalignedHalfWords(BaseIndex address, RegisterID dest)
+    {
+        load32(address, dest);
+    }
+#endif
+
+    void load16Unaligned(BaseIndex address, RegisterID dest)
+    {
+        load16(address, dest);
+    }
+
+    DataLabel32 load32WithAddressOffsetPatch(Address address, RegisterID dest)
+    {
+        DataLabel32 dataLabel(this);
+        m_assembler.ldr_un_imm(ARMRegisters::S0, 0);
+        m_assembler.dtr_ur(true, dest, address.base, ARMRegisters::S0);
+        return dataLabel;
+    }
+    
+    DataLabelCompact load32WithCompactAddressOffsetPatch(Address address, RegisterID dest)
+    {
+        DataLabelCompact dataLabel(this);
+        load32WithAddressOffsetPatch(address, dest);
+        return dataLabel;
+    }
+
+    void load16(BaseIndex address, RegisterID dest)
+    {
+        m_assembler.add_r(ARMRegisters::S1, address.base, m_assembler.lsl(address.index, address.scale));
+        load16(Address(ARMRegisters::S1, address.offset), dest);
+    }
+    
+    void load16(ImplicitAddress address, RegisterID dest)
+    {
+        if (address.offset >= 0)
+            m_assembler.ldrh_u(dest, address.base, m_assembler.getOffsetForHalfwordDataTransfer(address.offset, ARMRegisters::S0));
+        else
+            m_assembler.ldrh_d(dest, address.base, m_assembler.getOffsetForHalfwordDataTransfer(-address.offset, ARMRegisters::S0));
+    }
+
+    DataLabel32 store32WithAddressOffsetPatch(RegisterID src, Address address)
+    {
+        DataLabel32 dataLabel(this);
+        m_assembler.ldr_un_imm(ARMRegisters::S0, 0);
+        m_assembler.dtr_ur(false, src, address.base, ARMRegisters::S0);
+        return dataLabel;
+    }
+
+    void store32(RegisterID src, ImplicitAddress address)
+    {
+        m_assembler.dataTransfer32(false, src, address.base, address.offset);
+    }
+
+    void store32(RegisterID src, BaseIndex address)
+    {
+        m_assembler.baseIndexTransfer32(false, src, address.base, address.index, static_cast<int>(address.scale), address.offset);
+    }
+
+    void store32(TrustedImm32 imm, ImplicitAddress address)
+    {
+        if (imm.m_isPointer)
+            m_assembler.ldr_un_imm(ARMRegisters::S1, imm.m_value);
+        else
+            move(imm, ARMRegisters::S1);
+        store32(ARMRegisters::S1, address);
+    }
+
+    void store32(RegisterID src, void* address)
+    {
+        m_assembler.ldr_un_imm(ARMRegisters::S0, reinterpret_cast<ARMWord>(address));
+        m_assembler.dtr_u(false, src, ARMRegisters::S0, 0);
+    }
+
+    void store32(TrustedImm32 imm, void* address)
+    {
+        m_assembler.ldr_un_imm(ARMRegisters::S0, reinterpret_cast<ARMWord>(address));
+        if (imm.m_isPointer)
+            m_assembler.ldr_un_imm(ARMRegisters::S1, imm.m_value);
+        else
+            m_assembler.moveImm(imm.m_value, ARMRegisters::S1);
+        m_assembler.dtr_u(false, ARMRegisters::S1, ARMRegisters::S0, 0);
+    }
+
+    void pop(RegisterID dest)
+    {
+        m_assembler.pop_r(dest);
+    }
+
+    void push(RegisterID src)
+    {
+        m_assembler.push_r(src);
+    }
+
+    void push(Address address)
+    {
+        load32(address, ARMRegisters::S1);
+        push(ARMRegisters::S1);
+    }
+
+    void push(TrustedImm32 imm)
+    {
+        move(imm, ARMRegisters::S0);
+        push(ARMRegisters::S0);
+    }
+
+    void move(TrustedImm32 imm, RegisterID dest)
+    {
+        if (imm.m_isPointer)
+            m_assembler.ldr_un_imm(dest, imm.m_value);
+        else
+            m_assembler.moveImm(imm.m_value, dest);
+    }
+
+    void move(RegisterID src, RegisterID dest)
+    {
+        m_assembler.mov_r(dest, src);
+    }
+
+    void move(TrustedImmPtr imm, RegisterID dest)
+    {
+        move(TrustedImm32(imm), dest);
+    }
+
+    void swap(RegisterID reg1, RegisterID reg2)
+    {
+        m_assembler.mov_r(ARMRegisters::S0, reg1);
+        m_assembler.mov_r(reg1, reg2);
+        m_assembler.mov_r(reg2, ARMRegisters::S0);
+    }
+
+    void signExtend32ToPtr(RegisterID src, RegisterID dest)
+    {
+        if (src != dest)
+            move(src, dest);
+    }
+
+    void zeroExtend32ToPtr(RegisterID src, RegisterID dest)
+    {
+        if (src != dest)
+            move(src, dest);
+    }
+
+    Jump branch8(RelationalCondition cond, Address left, TrustedImm32 right)
+    {
+        load8(left, ARMRegisters::S1);
+        return branch32(cond, ARMRegisters::S1, right);
+    }
+
+    Jump branch8(RelationalCondition cond, BaseIndex left, TrustedImm32 right)
+    {
+        ASSERT(!(right.m_value & 0xFFFFFF00));
+        load8(left, ARMRegisters::S1);
+        return branch32(cond, ARMRegisters::S1, right);
+    }
+
+    Jump branch32(RelationalCondition cond, RegisterID left, RegisterID right, int useConstantPool = 0)
+    {
+        m_assembler.cmp_r(left, right);
+        return Jump(m_assembler.jmp(ARMCondition(cond), useConstantPool));
+    }
+
+    Jump branch32(RelationalCondition cond, RegisterID left, TrustedImm32 right, int useConstantPool = 0)
+    {
+        if (right.m_isPointer) {
+            m_assembler.ldr_un_imm(ARMRegisters::S0, right.m_value);
+            m_assembler.cmp_r(left, ARMRegisters::S0);
+        } else {
+            ARMWord tmp = (right.m_value == 0x80000000) ? ARMAssembler::INVALID_IMM : m_assembler.getOp2(-right.m_value);
+            if (tmp != ARMAssembler::INVALID_IMM)
+                m_assembler.cmn_r(left, tmp);
+            else
+                m_assembler.cmp_r(left, m_assembler.getImm(right.m_value, ARMRegisters::S0));
+        }
+        return Jump(m_assembler.jmp(ARMCondition(cond), useConstantPool));
+    }
+
+    Jump branch32(RelationalCondition cond, RegisterID left, Address right)
+    {
+        load32(right, ARMRegisters::S1);
+        return branch32(cond, left, ARMRegisters::S1);
+    }
+
+    Jump branch32(RelationalCondition cond, Address left, RegisterID right)
+    {
+        load32(left, ARMRegisters::S1);
+        return branch32(cond, ARMRegisters::S1, right);
+    }
+
+    Jump branch32(RelationalCondition cond, Address left, TrustedImm32 right)
+    {
+        load32(left, ARMRegisters::S1);
+        return branch32(cond, ARMRegisters::S1, right);
+    }
+
+    Jump branch32(RelationalCondition cond, BaseIndex left, TrustedImm32 right)
+    {
+        load32(left, ARMRegisters::S1);
+        return branch32(cond, ARMRegisters::S1, right);
+    }
+
+    Jump branch32WithUnalignedHalfWords(RelationalCondition cond, BaseIndex left, TrustedImm32 right)
+    {
+        load32WithUnalignedHalfWords(left, ARMRegisters::S1);
+        return branch32(cond, ARMRegisters::S1, right);
+    }
+
+    Jump branchTest8(ResultCondition cond, Address address, TrustedImm32 mask = TrustedImm32(-1))
+    {
+        load8(address, ARMRegisters::S1);
+        return branchTest32(cond, ARMRegisters::S1, mask);
+    }
+
+    Jump branchTest32(ResultCondition cond, RegisterID reg, RegisterID mask)
+    {
+        ASSERT((cond == Zero) || (cond == NonZero));
+        m_assembler.tst_r(reg, mask);
+        return Jump(m_assembler.jmp(ARMCondition(cond)));
+    }
+
+    Jump branchTest32(ResultCondition cond, RegisterID reg, TrustedImm32 mask = TrustedImm32(-1))
+    {
+        ASSERT((cond == Zero) || (cond == NonZero));
+        ARMWord w = m_assembler.getImm(mask.m_value, ARMRegisters::S0, true);
+        if (w & ARMAssembler::OP2_INV_IMM)
+            m_assembler.bics_r(ARMRegisters::S0, reg, w & ~ARMAssembler::OP2_INV_IMM);
+        else
+            m_assembler.tst_r(reg, w);
+        return Jump(m_assembler.jmp(ARMCondition(cond)));
+    }
+
+    Jump branchTest32(ResultCondition cond, Address address, TrustedImm32 mask = TrustedImm32(-1))
+    {
+        load32(address, ARMRegisters::S1);
+        return branchTest32(cond, ARMRegisters::S1, mask);
+    }
+
+    Jump branchTest32(ResultCondition cond, BaseIndex address, TrustedImm32 mask = TrustedImm32(-1))
+    {
+        load32(address, ARMRegisters::S1);
+        return branchTest32(cond, ARMRegisters::S1, mask);
+    }
+
+    Jump jump()
+    {
+        return Jump(m_assembler.jmp());
+    }
+
+    void jump(RegisterID target)
+    {
+        m_assembler.bx(target);
+    }
+
+    void jump(Address address)
+    {
+        load32(address, ARMRegisters::pc);
+    }
+
+    Jump branchAdd32(ResultCondition cond, RegisterID src, RegisterID dest)
+    {
+        ASSERT((cond == Overflow) || (cond == Signed) || (cond == Zero) || (cond == NonZero));
+        add32(src, dest);
+        return Jump(m_assembler.jmp(ARMCondition(cond)));
+    }
+
+    Jump branchAdd32(ResultCondition cond, TrustedImm32 imm, RegisterID dest)
+    {
+        ASSERT((cond == Overflow) || (cond == Signed) || (cond == Zero) || (cond == NonZero));
+        add32(imm, dest);
+        return Jump(m_assembler.jmp(ARMCondition(cond)));
+    }
+
+    void mull32(RegisterID src1, RegisterID src2, RegisterID dest)
+    {
+        if (src1 == dest) {
+            move(src1, ARMRegisters::S0);
+            src1 = ARMRegisters::S0;
+        }
+        m_assembler.mull_r(ARMRegisters::S1, dest, src2, src1);
+        m_assembler.cmp_r(ARMRegisters::S1, m_assembler.asr(dest, 31));
+    }
+
+    Jump branchMul32(ResultCondition cond, RegisterID src, RegisterID dest)
+    {
+        ASSERT((cond == Overflow) || (cond == Signed) || (cond == Zero) || (cond == NonZero));
+        if (cond == Overflow) {
+            mull32(src, dest, dest);
+            cond = NonZero;
+        }
+        else
+            mul32(src, dest);
+        return Jump(m_assembler.jmp(ARMCondition(cond)));
+    }
+
+    Jump branchMul32(ResultCondition cond, TrustedImm32 imm, RegisterID src, RegisterID dest)
+    {
+        ASSERT((cond == Overflow) || (cond == Signed) || (cond == Zero) || (cond == NonZero));
+        if (cond == Overflow) {
+            move(imm, ARMRegisters::S0);
+            mull32(ARMRegisters::S0, src, dest);
+            cond = NonZero;
+        }
+        else
+            mul32(imm, src, dest);
+        return Jump(m_assembler.jmp(ARMCondition(cond)));
+    }
+
+    Jump branchSub32(ResultCondition cond, RegisterID src, RegisterID dest)
+    {
+        ASSERT((cond == Overflow) || (cond == Signed) || (cond == Zero) || (cond == NonZero));
+        sub32(src, dest);
+        return Jump(m_assembler.jmp(ARMCondition(cond)));
+    }
+
+    Jump branchSub32(ResultCondition cond, TrustedImm32 imm, RegisterID dest)
+    {
+        ASSERT((cond == Overflow) || (cond == Signed) || (cond == Zero) || (cond == NonZero));
+        sub32(imm, dest);
+        return Jump(m_assembler.jmp(ARMCondition(cond)));
+    }
+
+    Jump branchNeg32(ResultCondition cond, RegisterID srcDest)
+    {
+        ASSERT((cond == Overflow) || (cond == Signed) || (cond == Zero) || (cond == NonZero));
+        neg32(srcDest);
+        return Jump(m_assembler.jmp(ARMCondition(cond)));
+    }
+
+    Jump branchOr32(ResultCondition cond, RegisterID src, RegisterID dest)
+    {
+        ASSERT((cond == Signed) || (cond == Zero) || (cond == NonZero));
+        or32(src, dest);
+        return Jump(m_assembler.jmp(ARMCondition(cond)));
+    }
+
+    void breakpoint()
+    {
+        m_assembler.bkpt(0);
+    }
+
+    Call nearCall()
+    {
+#if WTF_ARM_ARCH_AT_LEAST(5)
+        ensureSpace(2 * sizeof(ARMWord), sizeof(ARMWord));
+        m_assembler.loadBranchTarget(ARMRegisters::S1, ARMAssembler::AL, true);
+        return Call(m_assembler.blx(ARMRegisters::S1), Call::LinkableNear);
+#else
+        prepareCall();
+        return Call(m_assembler.jmp(ARMAssembler::AL, true), Call::LinkableNear);
+#endif
+    }
+
+    Call call(RegisterID target)
+    {
+        return Call(m_assembler.blx(target), Call::None);
+    }
+
+    void call(Address address)
+    {
+        call32(address.base, address.offset);
+    }
+
+    void ret()
+    {
+        m_assembler.bx(linkRegister);
+    }
+
+    void compare32(RelationalCondition cond, RegisterID left, RegisterID right, RegisterID dest)
+    {
+        m_assembler.cmp_r(left, right);
+        m_assembler.mov_r(dest, ARMAssembler::getOp2(0));
+        m_assembler.mov_r(dest, ARMAssembler::getOp2(1), ARMCondition(cond));
+    }
+
+    void compare32(RelationalCondition cond, RegisterID left, TrustedImm32 right, RegisterID dest)
+    {
+        m_assembler.cmp_r(left, m_assembler.getImm(right.m_value, ARMRegisters::S0));
+        m_assembler.mov_r(dest, ARMAssembler::getOp2(0));
+        m_assembler.mov_r(dest, ARMAssembler::getOp2(1), ARMCondition(cond));
+    }
+
+    void test32(ResultCondition cond, RegisterID reg, TrustedImm32 mask, RegisterID dest)
+    {
+        if (mask.m_value == -1)
+            m_assembler.cmp_r(0, reg);
+        else
+            m_assembler.tst_r(reg, m_assembler.getImm(mask.m_value, ARMRegisters::S0));
+        m_assembler.mov_r(dest, ARMAssembler::getOp2(0));
+        m_assembler.mov_r(dest, ARMAssembler::getOp2(1), ARMCondition(cond));
+    }
+
+    void test32(ResultCondition cond, Address address, TrustedImm32 mask, RegisterID dest)
+    {
+        load32(address, ARMRegisters::S1);
+        test32(cond, ARMRegisters::S1, mask, dest);
+    }
+
+    void test8(ResultCondition cond, Address address, TrustedImm32 mask, RegisterID dest)
+    {
+        load8(address, ARMRegisters::S1);
+        test32(cond, ARMRegisters::S1, mask, dest);
+    }
+
+    void add32(TrustedImm32 imm, RegisterID src, RegisterID dest)
+    {
+        m_assembler.add_r(dest, src, m_assembler.getImm(imm.m_value, ARMRegisters::S0));
+    }
+
+    void add32(TrustedImm32 imm, AbsoluteAddress address)
+    {
+        m_assembler.ldr_un_imm(ARMRegisters::S1, reinterpret_cast<ARMWord>(address.m_ptr));
+        m_assembler.dtr_u(true, ARMRegisters::S1, ARMRegisters::S1, 0);
+        add32(imm, ARMRegisters::S1);
+        m_assembler.ldr_un_imm(ARMRegisters::S0, reinterpret_cast<ARMWord>(address.m_ptr));
+        m_assembler.dtr_u(false, ARMRegisters::S1, ARMRegisters::S0, 0);
+    }
+
+    void sub32(TrustedImm32 imm, AbsoluteAddress address)
+    {
+        m_assembler.ldr_un_imm(ARMRegisters::S1, reinterpret_cast<ARMWord>(address.m_ptr));
+        m_assembler.dtr_u(true, ARMRegisters::S1, ARMRegisters::S1, 0);
+        sub32(imm, ARMRegisters::S1);
+        m_assembler.ldr_un_imm(ARMRegisters::S0, reinterpret_cast<ARMWord>(address.m_ptr));
+        m_assembler.dtr_u(false, ARMRegisters::S1, ARMRegisters::S0, 0);
+    }
+
+    void load32(const void* address, RegisterID dest)
+    {
+        m_assembler.ldr_un_imm(ARMRegisters::S0, reinterpret_cast<ARMWord>(address));
+        m_assembler.dtr_u(true, dest, ARMRegisters::S0, 0);
+    }
+
+    Jump branch32(RelationalCondition cond, AbsoluteAddress left, RegisterID right)
+    {
+        load32(left.m_ptr, ARMRegisters::S1);
+        return branch32(cond, ARMRegisters::S1, right);
+    }
+
+    Jump branch32(RelationalCondition cond, AbsoluteAddress left, TrustedImm32 right)
+    {
+        load32(left.m_ptr, ARMRegisters::S1);
+        return branch32(cond, ARMRegisters::S1, right);
+    }
+
+    void relativeTableJump(RegisterID index, int scale)
+    {
+        ASSERT(scale >= 0 && scale <= 31);
+        m_assembler.add_r(ARMRegisters::pc, ARMRegisters::pc, m_assembler.lsl(index, scale));
+
+        // NOP the default prefetching
+        m_assembler.mov_r(ARMRegisters::r0, ARMRegisters::r0);
+    }
+
+    Call call()
+    {
+#if WTF_ARM_ARCH_AT_LEAST(5)
+        ensureSpace(2 * sizeof(ARMWord), sizeof(ARMWord));
+        m_assembler.loadBranchTarget(ARMRegisters::S1, ARMAssembler::AL, true);
+        return Call(m_assembler.blx(ARMRegisters::S1), Call::Linkable);
+#else
+        prepareCall();
+        return Call(m_assembler.jmp(ARMAssembler::AL, true), Call::Linkable);
+#endif
+    }
+
+    Call tailRecursiveCall()
+    {
+        return Call::fromTailJump(jump());
+    }
+
+    Call makeTailRecursiveCall(Jump oldJump)
+    {
+        return Call::fromTailJump(oldJump);
+    }
+
+    DataLabelPtr moveWithPatch(TrustedImmPtr initialValue, RegisterID dest)
+    {
+        DataLabelPtr dataLabel(this);
+        m_assembler.ldr_un_imm(dest, reinterpret_cast<ARMWord>(initialValue.m_value));
+        return dataLabel;
+    }
+
+    Jump branchPtrWithPatch(RelationalCondition cond, RegisterID left, DataLabelPtr& dataLabel, TrustedImmPtr initialRightValue = TrustedImmPtr(0))
+    {
+        dataLabel = moveWithPatch(initialRightValue, ARMRegisters::S1);
+        Jump jump = branch32(cond, left, ARMRegisters::S1, true);
+        return jump;
+    }
+
+    Jump branchPtrWithPatch(RelationalCondition cond, Address left, DataLabelPtr& dataLabel, TrustedImmPtr initialRightValue = TrustedImmPtr(0))
+    {
+        load32(left, ARMRegisters::S1);
+        dataLabel = moveWithPatch(initialRightValue, ARMRegisters::S0);
+        Jump jump = branch32(cond, ARMRegisters::S0, ARMRegisters::S1, true);
+        return jump;
+    }
+
+    DataLabelPtr storePtrWithPatch(TrustedImmPtr initialValue, ImplicitAddress address)
+    {
+        DataLabelPtr dataLabel = moveWithPatch(initialValue, ARMRegisters::S1);
+        store32(ARMRegisters::S1, address);
+        return dataLabel;
+    }
+
+    DataLabelPtr storePtrWithPatch(ImplicitAddress address)
+    {
+        return storePtrWithPatch(TrustedImmPtr(0), address);
+    }
+
+    // Floating point operators
+    static bool supportsFloatingPoint()
+    {
+        return s_isVFPPresent;
+    }
+
+    static bool supportsFloatingPointTruncate()
+    {
+        return false;
+    }
+
+    static bool supportsFloatingPointSqrt()
+    {
+        return s_isVFPPresent;
+    }
+    static bool supportsFloatingPointAbs() { return false; }
+
+    void loadDouble(ImplicitAddress address, FPRegisterID dest)
+    {
+        m_assembler.doubleTransfer(true, dest, address.base, address.offset);
+    }
+
+    void loadDouble(const void* address, FPRegisterID dest)
+    {
+        m_assembler.ldr_un_imm(ARMRegisters::S0, (ARMWord)address);
+        m_assembler.fdtr_u(true, dest, ARMRegisters::S0, 0);
+    }
+
+    void storeDouble(FPRegisterID src, ImplicitAddress address)
+    {
+        m_assembler.doubleTransfer(false, src, address.base, address.offset);
+    }
+
+    void addDouble(FPRegisterID src, FPRegisterID dest)
+    {
+        m_assembler.vadd_f64_r(dest, dest, src);
+    }
+
+    void addDouble(Address src, FPRegisterID dest)
+    {
+        loadDouble(src, ARMRegisters::SD0);
+        addDouble(ARMRegisters::SD0, dest);
+    }
+
+    void divDouble(FPRegisterID src, FPRegisterID dest)
+    {
+        m_assembler.vdiv_f64_r(dest, dest, src);
+    }
+
+    void divDouble(Address src, FPRegisterID dest)
+    {
+        ASSERT_NOT_REACHED(); // Untested
+        loadDouble(src, ARMRegisters::SD0);
+        divDouble(ARMRegisters::SD0, dest);
+    }
+
+    void subDouble(FPRegisterID src, FPRegisterID dest)
+    {
+        m_assembler.vsub_f64_r(dest, dest, src);
+    }
+
+    void subDouble(Address src, FPRegisterID dest)
+    {
+        loadDouble(src, ARMRegisters::SD0);
+        subDouble(ARMRegisters::SD0, dest);
+    }
+
+    void mulDouble(FPRegisterID src, FPRegisterID dest)
+    {
+        m_assembler.vmul_f64_r(dest, dest, src);
+    }
+
+    void mulDouble(Address src, FPRegisterID dest)
+    {
+        loadDouble(src, ARMRegisters::SD0);
+        mulDouble(ARMRegisters::SD0, dest);
+    }
+
+    void sqrtDouble(FPRegisterID src, FPRegisterID dest)
+    {
+        m_assembler.vsqrt_f64_r(dest, src);
+    }
+    
+    void absDouble(FPRegisterID, FPRegisterID)
+    {
+        ASSERT_NOT_REACHED();
+    }
+
+    void convertInt32ToDouble(RegisterID src, FPRegisterID dest)
+    {
+        m_assembler.vmov_vfp_r(dest << 1, src);
+        m_assembler.vcvt_f64_s32_r(dest, dest << 1);
+    }
+
+    void convertInt32ToDouble(Address src, FPRegisterID dest)
+    {
+        ASSERT_NOT_REACHED(); // Untested
+        // flds does not worth the effort here
+        load32(src, ARMRegisters::S1);
+        convertInt32ToDouble(ARMRegisters::S1, dest);
+    }
+
+    void convertInt32ToDouble(AbsoluteAddress src, FPRegisterID dest)
+    {
+        ASSERT_NOT_REACHED(); // Untested
+        // flds does not worth the effort here
+        m_assembler.ldr_un_imm(ARMRegisters::S1, (ARMWord)src.m_ptr);
+        m_assembler.dtr_u(true, ARMRegisters::S1, ARMRegisters::S1, 0);
+        convertInt32ToDouble(ARMRegisters::S1, dest);
+    }
+
+    Jump branchDouble(DoubleCondition cond, FPRegisterID left, FPRegisterID right)
+    {
+        m_assembler.vcmp_f64_r(left, right);
+        m_assembler.vmrs_apsr();
+        if (cond & DoubleConditionBitSpecial)
+            m_assembler.cmp_r(ARMRegisters::S0, ARMRegisters::S0, ARMAssembler::VS);
+        return Jump(m_assembler.jmp(static_cast<ARMAssembler::Condition>(cond & ~DoubleConditionMask)));
+    }
+
+    // Truncates 'src' to an integer, and places the resulting 'dest'.
+    // If the result is not representable as a 32 bit value, branch.
+    // May also branch for some values that are representable in 32 bits
+    // (specifically, in this case, INT_MIN).
+    Jump branchTruncateDoubleToInt32(FPRegisterID src, RegisterID dest)
+    {
+        UNUSED_PARAM(src);
+        UNUSED_PARAM(dest);
+        ASSERT_NOT_REACHED();
+        return jump();
+    }
+
+    // Convert 'src' to an integer, and places the resulting 'dest'.
+    // If the result is not representable as a 32 bit value, branch.
+    // May also branch for some values that are representable in 32 bits
+    // (specifically, in this case, 0).
+    void branchConvertDoubleToInt32(FPRegisterID src, RegisterID dest, JumpList& failureCases, FPRegisterID fpTemp)
+    {
+        m_assembler.vcvt_s32_f64_r(ARMRegisters::SD0 << 1, src);
+        m_assembler.vmov_arm_r(dest, ARMRegisters::SD0 << 1);
+
+        // Convert the integer result back to float & compare to the original value - if not equal or unordered (NaN) then jump.
+        m_assembler.vcvt_f64_s32_r(ARMRegisters::SD0, ARMRegisters::SD0 << 1);
+        failureCases.append(branchDouble(DoubleNotEqualOrUnordered, src, ARMRegisters::SD0));
+
+        // If the result is zero, it might have been -0.0, and 0.0 equals to -0.0
+        failureCases.append(branchTest32(Zero, dest));
+    }
+
+    Jump branchDoubleNonZero(FPRegisterID reg, FPRegisterID scratch)
+    {
+        m_assembler.mov_r(ARMRegisters::S0, ARMAssembler::getOp2(0));
+        convertInt32ToDouble(ARMRegisters::S0, scratch);
+        return branchDouble(DoubleNotEqual, reg, scratch);
+    }
+
+    Jump branchDoubleZeroOrNaN(FPRegisterID reg, FPRegisterID scratch)
+    {
+        m_assembler.mov_r(ARMRegisters::S0, ARMAssembler::getOp2(0));
+        convertInt32ToDouble(ARMRegisters::S0, scratch);
+        return branchDouble(DoubleEqualOrUnordered, reg, scratch);
+    }
+
+    void nop()
+    {
+        m_assembler.nop();
+    }
+
+    static FunctionPtr readCallTarget(CodeLocationCall call)
+    {
+        return FunctionPtr(reinterpret_cast<void(*)()>(ARMAssembler::readCallTarget(call.dataLocation())));
+    }
+
+protected:
+    ARMAssembler::Condition ARMCondition(RelationalCondition cond)
+    {
+        return static_cast<ARMAssembler::Condition>(cond);
+    }
+
+    ARMAssembler::Condition ARMCondition(ResultCondition cond)
+    {
+        return static_cast<ARMAssembler::Condition>(cond);
+    }
+
+    void ensureSpace(int insnSpace, int constSpace)
+    {
+        m_assembler.ensureSpace(insnSpace, constSpace);
+    }
+
+    int sizeOfConstantPool()
+    {
+        return m_assembler.sizeOfConstantPool();
+    }
+
+    void prepareCall()
+    {
+#if WTF_ARM_ARCH_VERSION < 5
+        ensureSpace(2 * sizeof(ARMWord), sizeof(ARMWord));
+
+        m_assembler.mov_r(linkRegister, ARMRegisters::pc);
+#endif
+    }
+
+    void call32(RegisterID base, int32_t offset)
+    {
+#if WTF_ARM_ARCH_AT_LEAST(5)
+        int targetReg = ARMRegisters::S1;
+#else
+        int targetReg = ARMRegisters::pc;
+#endif
+        int tmpReg = ARMRegisters::S1;
+
+        if (base == ARMRegisters::sp)
+            offset += 4;
+
+        if (offset >= 0) {
+            if (offset <= 0xfff) {
+                prepareCall();
+                m_assembler.dtr_u(true, targetReg, base, offset);
+            } else if (offset <= 0xfffff) {
+                m_assembler.add_r(tmpReg, base, ARMAssembler::OP2_IMM | (offset >> 12) | (10 << 8));
+                prepareCall();
+                m_assembler.dtr_u(true, targetReg, tmpReg, offset & 0xfff);
+            } else {
+                m_assembler.moveImm(offset, tmpReg);
+                prepareCall();
+                m_assembler.dtr_ur(true, targetReg, base, tmpReg);
+            }
+        } else  {
+            offset = -offset;
+            if (offset <= 0xfff) {
+                prepareCall();
+                m_assembler.dtr_d(true, targetReg, base, offset);
+            } else if (offset <= 0xfffff) {
+                m_assembler.sub_r(tmpReg, base, ARMAssembler::OP2_IMM | (offset >> 12) | (10 << 8));
+                prepareCall();
+                m_assembler.dtr_d(true, targetReg, tmpReg, offset & 0xfff);
+            } else {
+                m_assembler.moveImm(offset, tmpReg);
+                prepareCall();
+                m_assembler.dtr_dr(true, targetReg, base, tmpReg);
+            }
+        }
+#if WTF_ARM_ARCH_AT_LEAST(5)
+        m_assembler.blx(targetReg);
+#endif
+    }
+
+private:
+    friend class LinkBuffer;
+    friend class RepatchBuffer;
+
+    static void linkCall(void* code, Call call, FunctionPtr function)
+    {
+        ARMAssembler::linkCall(code, call.m_label, function.value());
+    }
+
+    static void repatchCall(CodeLocationCall call, CodeLocationLabel destination)
+    {
+        ARMAssembler::relinkCall(call.dataLocation(), destination.executableAddress());
+    }
+
+    static void repatchCall(CodeLocationCall call, FunctionPtr destination)
+    {
+        ARMAssembler::relinkCall(call.dataLocation(), destination.executableAddress());
+    }
+
+    static const bool s_isVFPPresent;
+};
+
+}
+
+#endif // ENABLE(ASSEMBLER) && CPU(ARM_TRADITIONAL)
+
+#endif // MacroAssemblerARM_h