registers.hh revision 12109:f29e9c5418aa 
1/*
2 * Copyright (c) 2003-2005 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;
9 * 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 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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#ifndef __ARCH_ALPHA_REGISTERS_HH__
32#define __ARCH_ALPHA_REGISTERS_HH__
33
34#include "arch/alpha/generated/max_inst_regs.hh"
35#include "arch/alpha/ipr.hh"
36#include "arch/generic/types.hh"
37#include "arch/generic/vec_reg.hh"
38#include "base/types.hh"
39
40namespace AlphaISA {
41
42using AlphaISAInst::MaxInstSrcRegs;
43using AlphaISAInst::MaxInstDestRegs;
44
45// Locked read/write flags are can't be detected by the ISA parser
46const int MaxMiscDestRegs = AlphaISAInst::MaxMiscDestRegs + 1;
47
48typedef uint64_t IntReg;
49
50// floating point register file entry type
51typedef double FloatReg;
52typedef uint64_t FloatRegBits;
53
54// control register file contents
55typedef uint64_t MiscReg;
56
57// dummy typedef since we don't have CC regs
58typedef uint8_t CCReg;
59
60// dummy typedefs since we don't have vector regs
61constexpr unsigned NumVecElemPerVecReg = 2;
62using VecElem = uint32_t;
63using VecReg = ::VecRegT<VecElem, NumVecElemPerVecReg, false>;
64using ConstVecReg = ::VecRegT<VecElem, NumVecElemPerVecReg, true>;
65using VecRegContainer = VecReg::Container;
66// This has to be one to prevent warnings that are treated as errors
67constexpr unsigned NumVecRegs = 1;
68
69union AnyReg
70{
71    IntReg  intreg;
72    FloatReg   fpreg;
73    MiscReg ctrlreg;
74};
75
76enum MiscRegIndex
77{
78    MISCREG_FPCR = NumInternalProcRegs,
79    MISCREG_UNIQ,
80    MISCREG_LOCKFLAG,
81    MISCREG_LOCKADDR,
82    MISCREG_INTR,
83    NUM_MISCREGS
84};
85
86// semantically meaningful register indices
87const RegIndex ZeroReg = 31;     // architecturally meaningful
88// the rest of these depend on the ABI
89const RegIndex StackPointerReg = 30;
90const RegIndex GlobalPointerReg = 29;
91const RegIndex ProcedureValueReg = 27;
92const RegIndex ReturnAddressReg = 26;
93const RegIndex ReturnValueReg = 0;
94const RegIndex FramePointerReg = 15;
95
96const RegIndex SyscallNumReg = 0;
97const RegIndex FirstArgumentReg = 16;
98const RegIndex SyscallPseudoReturnReg = 20;
99const RegIndex SyscallSuccessReg = 19;
100
101const int NumIntArchRegs = 32;
102const int NumPALShadowRegs = 8;
103const int NumFloatArchRegs = 32;
104
105const int NumIntRegs = NumIntArchRegs + NumPALShadowRegs;
106const int NumFloatRegs = NumFloatArchRegs;
107const int NumCCRegs = 0;
108const int NumMiscRegs = NUM_MISCREGS;
109
110const int TotalNumRegs =
111    NumIntRegs + NumFloatRegs + NumMiscRegs;
112
113} // namespace AlphaISA
114
115#endif // __ARCH_ALPHA_REGFILE_HH__
116