1/*
2 * Copyright (C) 2015 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#include "config.h"
27#include "JITBitAndGenerator.h"
28
29#if ENABLE(JIT)
30
31namespace JSC {
32
33void JITBitAndGenerator::generateFastPath(CCallHelpers& jit)
34{
35#if USE(JSVALUE64)
36 ASSERT(m_scratchGPR != InvalidGPRReg);
37 ASSERT(m_scratchGPR != m_left.payloadGPR());
38 ASSERT(m_scratchGPR != m_right.payloadGPR());
39#else
40 UNUSED_PARAM(m_scratchGPR);
41#endif
42
43 ASSERT(!m_leftOperand.isConstInt32() || !m_rightOperand.isConstInt32());
44
45 m_didEmitFastPath = true;
46
47 if (m_leftOperand.isConstInt32() || m_rightOperand.isConstInt32()) {
48 JSValueRegs var = m_leftOperand.isConstInt32() ? m_right : m_left;
49 SnippetOperand& constOpr = m_leftOperand.isConstInt32() ? m_leftOperand : m_rightOperand;
50
51 // Try to do intVar & intConstant.
52 m_slowPathJumpList.append(jit.branchIfNotInt32(var));
53
54 jit.moveValueRegs(var, m_result);
55 if (constOpr.asConstInt32() != static_cast<int32_t>(0xffffffff)) {
56#if USE(JSVALUE64)
57 jit.and64(CCallHelpers::Imm32(constOpr.asConstInt32()), m_result.payloadGPR());
58 if (constOpr.asConstInt32() >= 0)
59 jit.or64(GPRInfo::tagTypeNumberRegister, m_result.payloadGPR());
60#else
61 jit.and32(CCallHelpers::Imm32(constOpr.asConstInt32()), m_result.payloadGPR());
62#endif
63 }
64
65 } else {
66 ASSERT(!m_leftOperand.isConstInt32() && !m_rightOperand.isConstInt32());
67
68 // Try to do intVar & intVar.
69#if USE(JSVALUE64)
70 jit.move(m_left.payloadGPR(), m_scratchGPR);
71 jit.and64(m_right.payloadGPR(), m_scratchGPR);
72 m_slowPathJumpList.append(jit.branchIfNotInt32(m_scratchGPR));
73 jit.move(m_scratchGPR, m_result.payloadGPR());
74#else
75 m_slowPathJumpList.append(jit.branchIfNotInt32(m_left));
76 m_slowPathJumpList.append(jit.branchIfNotInt32(m_right));
77 jit.moveValueRegs(m_left, m_result);
78 jit.and32(m_right.payloadGPR(), m_result.payloadGPR());
79#endif
80 }
81}
82
83} // namespace JSC
84
85#endif // ENABLE(JIT)
86