1/*
2 * Copyright (C) 2008 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#ifndef MacroAssemblerX86_h
27#define MacroAssemblerX86_h
28
29#if ENABLE(ASSEMBLER) && CPU(X86)
30
31#include "MacroAssemblerX86Common.h"
32
33namespace JSC {
34
35class MacroAssemblerX86 : public MacroAssemblerX86Common {
36public:
37    MacroAssemblerX86()
38        : m_isSSE2Present(isSSE2Present())
39    {
40    }
41
42    static const Scale ScalePtr = TimesFour;
43
44    using MacroAssemblerX86Common::add32;
45    using MacroAssemblerX86Common::and32;
46    using MacroAssemblerX86Common::sub32;
47    using MacroAssemblerX86Common::or32;
48    using MacroAssemblerX86Common::load32;
49    using MacroAssemblerX86Common::store32;
50    using MacroAssemblerX86Common::branch32;
51    using MacroAssemblerX86Common::call;
52    using MacroAssemblerX86Common::loadDouble;
53    using MacroAssemblerX86Common::convertInt32ToDouble;
54
55    void add32(TrustedImm32 imm, RegisterID src, RegisterID dest)
56    {
57        m_assembler.leal_mr(imm.m_value, src, dest);
58    }
59
60    void add32(TrustedImm32 imm, AbsoluteAddress address)
61    {
62        m_assembler.addl_im(imm.m_value, address.m_ptr);
63    }
64
65    void addWithCarry32(TrustedImm32 imm, AbsoluteAddress address)
66    {
67        m_assembler.adcl_im(imm.m_value, address.m_ptr);
68    }
69
70    void and32(TrustedImm32 imm, AbsoluteAddress address)
71    {
72        m_assembler.andl_im(imm.m_value, address.m_ptr);
73    }
74
75    void or32(TrustedImm32 imm, AbsoluteAddress address)
76    {
77        m_assembler.orl_im(imm.m_value, address.m_ptr);
78    }
79
80    void sub32(TrustedImm32 imm, AbsoluteAddress address)
81    {
82        m_assembler.subl_im(imm.m_value, address.m_ptr);
83    }
84
85    void load32(void* address, RegisterID dest)
86    {
87        m_assembler.movl_mr(address, dest);
88    }
89
90    void loadDouble(const void* address, FPRegisterID dest)
91    {
92        ASSERT(isSSE2Present());
93        m_assembler.movsd_mr(address, dest);
94    }
95
96    void convertInt32ToDouble(AbsoluteAddress src, FPRegisterID dest)
97    {
98        m_assembler.cvtsi2sd_mr(src.m_ptr, dest);
99    }
100
101    void store32(TrustedImm32 imm, void* address)
102    {
103        m_assembler.movl_i32m(imm.m_value, address);
104    }
105
106    void store32(RegisterID src, void* address)
107    {
108        m_assembler.movl_rm(src, address);
109    }
110
111    Jump branch32(Condition cond, AbsoluteAddress left, RegisterID right)
112    {
113        m_assembler.cmpl_rm(right, left.m_ptr);
114        return Jump(m_assembler.jCC(x86Condition(cond)));
115    }
116
117    Jump branch32(Condition cond, AbsoluteAddress left, TrustedImm32 right)
118    {
119        m_assembler.cmpl_im(right.m_value, left.m_ptr);
120        return Jump(m_assembler.jCC(x86Condition(cond)));
121    }
122
123    Call call()
124    {
125        return Call(m_assembler.call(), Call::Linkable);
126    }
127
128    Call tailRecursiveCall()
129    {
130        return Call::fromTailJump(jump());
131    }
132
133    Call makeTailRecursiveCall(Jump oldJump)
134    {
135        return Call::fromTailJump(oldJump);
136    }
137
138
139    DataLabelPtr moveWithPatch(TrustedImmPtr initialValue, RegisterID dest)
140    {
141        m_assembler.movl_i32r(initialValue.asIntptr(), dest);
142        return DataLabelPtr(this);
143    }
144
145    Jump branchPtrWithPatch(Condition cond, RegisterID left, DataLabelPtr& dataLabel, TrustedImmPtr initialRightValue = TrustedImmPtr(0))
146    {
147        m_assembler.cmpl_ir_force32(initialRightValue.asIntptr(), left);
148        dataLabel = DataLabelPtr(this);
149        return Jump(m_assembler.jCC(x86Condition(cond)));
150    }
151
152    Jump branchPtrWithPatch(Condition cond, Address left, DataLabelPtr& dataLabel, TrustedImmPtr initialRightValue = TrustedImmPtr(0))
153    {
154        m_assembler.cmpl_im_force32(initialRightValue.asIntptr(), left.offset, left.base);
155        dataLabel = DataLabelPtr(this);
156        return Jump(m_assembler.jCC(x86Condition(cond)));
157    }
158
159    DataLabelPtr storePtrWithPatch(TrustedImmPtr initialValue, ImplicitAddress address)
160    {
161        m_assembler.movl_i32m(initialValue.asIntptr(), address.offset, address.base);
162        return DataLabelPtr(this);
163    }
164
165    bool supportsFloatingPoint() const { return m_isSSE2Present; }
166    // See comment on MacroAssemblerARMv7::supportsFloatingPointTruncate()
167    bool supportsFloatingPointTruncate() const { return m_isSSE2Present; }
168    bool supportsFloatingPointSqrt() const { return m_isSSE2Present; }
169
170private:
171    const bool m_isSSE2Present;
172
173    friend class LinkBuffer;
174    friend class RepatchBuffer;
175
176    static void linkCall(void* code, Call call, FunctionPtr function)
177    {
178        X86Assembler::linkCall(code, call.m_jmp, function.value());
179    }
180
181    static void repatchCall(CodeLocationCall call, CodeLocationLabel destination)
182    {
183        X86Assembler::relinkCall(call.dataLocation(), destination.executableAddress());
184    }
185
186    static void repatchCall(CodeLocationCall call, FunctionPtr destination)
187    {
188        X86Assembler::relinkCall(call.dataLocation(), destination.executableAddress());
189    }
190};
191
192} // namespace JSC
193
194#endif // ENABLE(ASSEMBLER)
195
196#endif // MacroAssemblerX86_h
197