registers.hh revision 10338:8bee5f4edb92 
1/*
2 * Copyright (c) 2010-2011, 2014 ARM Limited
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 * Copyright (c) 2007-2008 The Florida State University
15 * All rights reserved.
16 *
17 * Redistribution and use in source and binary forms, with or without
18 * modification, are permitted provided that the following conditions are
19 * met: redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer;
21 * redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution;
24 * neither the name of the copyright holders nor the names of its
25 * contributors may be used to endorse or promote products derived from
26 * this software without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
32 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
33 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
34 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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38 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 *
40 * Authors: Stephen Hines
41 */
42
43#ifndef __ARCH_ARM_REGISTERS_HH__
44#define __ARCH_ARM_REGISTERS_HH__
45
46#include "arch/arm/generated/max_inst_regs.hh"
47#include "arch/arm/intregs.hh"
48#include "arch/arm/ccregs.hh"
49#include "arch/arm/miscregs.hh"
50
51namespace ArmISA {
52
53
54// For a predicated instruction, we need all the
55// destination registers to also be sources
56const int MaxInstSrcRegs = ArmISAInst::MaxInstDestRegs +
57    ArmISAInst::MaxInstSrcRegs;
58using ArmISAInst::MaxInstDestRegs;
59using ArmISAInst::MaxMiscDestRegs;
60
61typedef uint16_t  RegIndex;
62
63typedef uint64_t IntReg;
64
65// floating point register file entry type
66typedef uint32_t FloatRegBits;
67typedef float FloatReg;
68
69// cop-0/cop-1 system control register
70typedef uint64_t MiscReg;
71
72// condition code register; must be at least 32 bits for FpCondCodes
73typedef uint64_t CCReg;
74
75// Constants Related to the number of registers
76const int NumIntArchRegs = NUM_ARCH_INTREGS;
77// The number of single precision floating point registers
78const int NumFloatV7ArchRegs  = 64;
79const int NumFloatV8ArchRegs  = 128;
80const int NumFloatSpecialRegs = 32;
81
82const int NumIntRegs = NUM_INTREGS;
83const int NumFloatRegs = NumFloatV8ArchRegs + NumFloatSpecialRegs;
84const int NumCCRegs = NUM_CCREGS;
85const int NumMiscRegs = NUM_MISCREGS;
86
87#define ISA_HAS_CC_REGS
88
89const int TotalNumRegs = NumIntRegs + NumFloatRegs + NumMiscRegs;
90
91// semantically meaningful register indices
92const int ReturnValueReg = 0;
93const int ReturnValueReg1 = 1;
94const int ReturnValueReg2 = 2;
95const int NumArgumentRegs = 4;
96const int NumArgumentRegs64 = 8;
97const int ArgumentReg0 = 0;
98const int ArgumentReg1 = 1;
99const int ArgumentReg2 = 2;
100const int ArgumentReg3 = 3;
101const int FramePointerReg = 11;
102const int StackPointerReg = INTREG_SP;
103const int ReturnAddressReg = INTREG_LR;
104const int PCReg = INTREG_PC;
105
106const int ZeroReg = INTREG_ZERO;
107
108const int SyscallNumReg = ReturnValueReg;
109const int SyscallPseudoReturnReg = ReturnValueReg;
110const int SyscallSuccessReg = ReturnValueReg;
111
112// These help enumerate all the registers for dependence tracking.
113const int FP_Reg_Base = NumIntRegs * (MODE_MAXMODE + 1);
114const int CC_Reg_Base = FP_Reg_Base + NumFloatRegs;
115const int Misc_Reg_Base = CC_Reg_Base + NumCCRegs;
116const int Max_Reg_Index = Misc_Reg_Base + NumMiscRegs;
117
118typedef union {
119    IntReg   intreg;
120    FloatReg fpreg;
121    CCReg    ccreg;
122    MiscReg  ctrlreg;
123} AnyReg;
124
125} // namespace ArmISA
126
127#endif
128