JITBitAndGenerator.cpp [plain text]
#include "config.h"
#include "JITBitAndGenerator.h"
#if ENABLE(JIT)
namespace JSC {
void JITBitAndGenerator::generateFastPath(CCallHelpers& jit)
{
#if USE(JSVALUE64)
ASSERT(m_scratchGPR != InvalidGPRReg);
ASSERT(m_scratchGPR != m_left.payloadGPR());
ASSERT(m_scratchGPR != m_right.payloadGPR());
#else
UNUSED_PARAM(m_scratchGPR);
#endif
ASSERT(!m_leftOperand.isConstInt32() || !m_rightOperand.isConstInt32());
m_didEmitFastPath = true;
if (m_leftOperand.isConstInt32() || m_rightOperand.isConstInt32()) {
JSValueRegs var = m_leftOperand.isConstInt32() ? m_right : m_left;
SnippetOperand& constOpr = m_leftOperand.isConstInt32() ? m_leftOperand : m_rightOperand;
m_slowPathJumpList.append(jit.branchIfNotInt32(var));
jit.moveValueRegs(var, m_result);
if (constOpr.asConstInt32() != static_cast<int32_t>(0xffffffff)) {
#if USE(JSVALUE64)
jit.and64(CCallHelpers::Imm32(constOpr.asConstInt32()), m_result.payloadGPR());
if (constOpr.asConstInt32() >= 0)
jit.or64(GPRInfo::tagTypeNumberRegister, m_result.payloadGPR());
#else
jit.and32(CCallHelpers::Imm32(constOpr.asConstInt32()), m_result.payloadGPR());
#endif
}
} else {
ASSERT(!m_leftOperand.isConstInt32() && !m_rightOperand.isConstInt32());
#if USE(JSVALUE64)
jit.move(m_left.payloadGPR(), m_scratchGPR);
jit.and64(m_right.payloadGPR(), m_scratchGPR);
m_slowPathJumpList.append(jit.branchIfNotInt32(m_scratchGPR));
jit.move(m_scratchGPR, m_result.payloadGPR());
#else
m_slowPathJumpList.append(jit.branchIfNotInt32(m_left));
m_slowPathJumpList.append(jit.branchIfNotInt32(m_right));
jit.moveValueRegs(m_left, m_result);
jit.and32(m_right.payloadGPR(), m_result.payloadGPR());
#endif
}
}
}
#endif // ENABLE(JIT)