registers.hh revision 9046 
1/*
2 * Copyright (c) 2007 The Hewlett-Packard Development Company
3 * All rights reserved.
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software
9 * licensed hereunder.  You may use the software subject to the license
10 * terms below provided that you ensure that this notice is replicated
11 * unmodified and in its entirety in all distributions of the software,
12 * modified or unmodified, in source code or in binary form.
13 *
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions are
16 * met: redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer;
18 * redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution;
21 * neither the name of the copyright holders nor the names of its
22 * contributors may be used to endorse or promote products derived from
23 * this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
26 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
27 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
28 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
29 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
30 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
31 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
32 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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35 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 *
37 * Authors: Gabe Black
38 */
39
40#ifndef __ARCH_X86_REGISTERS_HH__
41#define __ARCH_X86_REGISTERS_HH__
42
43#include "arch/x86/generated/max_inst_regs.hh"
44#include "arch/x86/regs/int.hh"
45#include "arch/x86/regs/misc.hh"
46#include "arch/x86/x86_traits.hh"
47
48namespace X86ISA
49{
50using X86ISAInst::MaxInstSrcRegs;
51using X86ISAInst::MaxInstDestRegs;
52using X86ISAInst::MaxMiscDestRegs;
53const int NumMiscArchRegs = NUM_MISCREGS;
54const int NumMiscRegs = NUM_MISCREGS;
55
56const int NumIntArchRegs = NUM_INTREGS;
57const int NumIntRegs =
58    NumIntArchRegs + NumMicroIntRegs +
59    NumPseudoIntRegs + NumImplicitIntRegs;
60
61//Each 128 bit xmm register is broken into two effective 64 bit registers.
62const int NumFloatRegs =
63    NumMMXRegs + 2 * NumXMMRegs + NumMicroFpRegs;
64const int NumFloatArchRegs = NumFloatRegs + 8;
65
66// These enumerate all the registers for dependence tracking.
67enum DependenceTags {
68    //There are 16 microcode registers at the moment. This is an
69    //unusually large constant to make sure there isn't overflow.
70    FP_Base_DepTag = 128,
71    Ctrl_Base_DepTag =
72        FP_Base_DepTag +
73        //mmx/x87 registers
74        8 +
75        //xmm registers
76        16 * 2 +
77        //The microcode fp registers
78        8 +
79        //The indices that are mapped over the fp stack
80        8,
81    Max_DepTag = Ctrl_Base_DepTag + NumMiscRegs
82};
83
84// semantically meaningful register indices
85//There is no such register in X86
86const int ZeroReg = NUM_INTREGS;
87const int StackPointerReg = INTREG_RSP;
88//X86 doesn't seem to have a link register
89const int ReturnAddressReg = 0;
90const int ReturnValueReg = INTREG_RAX;
91const int FramePointerReg = INTREG_RBP;
92
93// Some OS syscalls use a second register (rdx) to return a second
94// value
95const int SyscallPseudoReturnReg = INTREG_RDX;
96
97typedef uint64_t IntReg;
98//XXX Should this be a 128 bit structure for XMM memory ops?
99typedef uint64_t LargestRead;
100typedef uint64_t MiscReg;
101
102//These floating point types are correct for mmx, but not
103//technically for x87 (80 bits) or at all for xmm (128 bits)
104typedef double FloatReg;
105typedef uint64_t FloatRegBits;
106typedef union
107{
108    IntReg intReg;
109    FloatReg fpReg;
110    MiscReg ctrlReg;
111} AnyReg;
112
113typedef uint16_t RegIndex;
114
115} // namespace X86ISA
116
117#endif // __ARCH_X86_REGFILE_HH__
118