1/*
2 * Copyright (c) 2009 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;

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23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Authors: Gabe Black
29 */
30
31#include "arch/x86/isa.hh"
32#include "arch/x86/floatregs.hh"
33#include "cpu/thread_context.hh"
34
35namespace X86ISA
36{
37
38void
39ISA::clear()
40{
41 miscRegFile.clear();
42}
43
44MiscReg
45ISA::readMiscRegNoEffect(int miscReg)
46{
47 return miscRegFile.readRegNoEffect((MiscRegIndex)miscReg);
48}
49
50MiscReg
51ISA::readMiscReg(int miscReg, ThreadContext *tc)
52{
53 return miscRegFile.readReg((MiscRegIndex)miscReg, tc);
54}
55
56void
57ISA::setMiscRegNoEffect(int miscReg, const MiscReg val)
58{
59 miscRegFile.setRegNoEffect((MiscRegIndex)miscReg, val);
60}
61
62void
63ISA::setMiscReg(int miscReg, const MiscReg val, ThreadContext *tc)
64{
65 miscRegFile.setReg((MiscRegIndex)miscReg, val, tc);
66}
67
68int
69ISA::flattenIntIndex(int reg)
70{
71 //If we need to fold over the index to match byte semantics, do that.
72 //Otherwise, just strip off any extra bits and pass it through.
73 if (reg & (1 << 6))
74 return (reg & (~(1 << 6) - 0x4));
75 else
76 return (reg & ~(1 << 6));
77}
78
79int
80ISA::flattenFloatIndex(int reg)
81{
82 if (reg >= NUM_FLOATREGS) {
83 int top = miscRegFile.readRegNoEffect(MISCREG_X87_TOP);
84 reg = FLOATREG_STACK(reg - NUM_FLOATREGS, top);
85 }
86 return reg;
87}
88
89void
90ISA::serialize(EventManager *em, std::ostream &os)
91{
92 miscRegFile.serialize(os);
93}
94
95void
96ISA::unserialize(EventManager *em, Checkpoint *cp, const std::string &section)
97{
98 miscRegFile.unserialize(cp, section);
99}
100
101}