registers.hh revision 13556:9f57bb56153a 
1/*
2 * Copyright (c) 2007 The Hewlett-Packard Development Company
3 * Copyright (c) 2013 Advanced Micro Devices, Inc.
4 * All rights reserved.
5 *
6 * The license below extends only to copyright in the software and shall
7 * not be construed as granting a license to any other intellectual
8 * property including but not limited to intellectual property relating
9 * to a hardware implementation of the functionality of the software
10 * licensed hereunder.  You may use the software subject to the license
11 * terms below provided that you ensure that this notice is replicated
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13 * modified or unmodified, in source code or in binary form.
14 *
15 * Redistribution and use in source and binary forms, with or without
16 * modification, are permitted provided that the following conditions are
17 * met: redistributions of source code must retain the above copyright
18 * notice, this list of conditions and the following disclaimer;
19 * redistributions in binary form must reproduce the above copyright
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22 * neither the name of the copyright holders nor the names of its
23 * contributors may be used to endorse or promote products derived from
24 * this software without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
27 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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32 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
33 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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37 *
38 * Authors: Gabe Black
39 */
40
41#ifndef __ARCH_X86_REGISTERS_HH__
42#define __ARCH_X86_REGISTERS_HH__
43
44#include "arch/generic/vec_reg.hh"
45#include "arch/x86/generated/max_inst_regs.hh"
46#include "arch/x86/regs/int.hh"
47#include "arch/x86/regs/ccr.hh"
48#include "arch/x86/regs/misc.hh"
49#include "arch/x86/x86_traits.hh"
50
51namespace X86ISA
52{
53using X86ISAInst::MaxInstSrcRegs;
54using X86ISAInst::MaxInstDestRegs;
55using X86ISAInst::MaxMiscDestRegs;
56const int NumMiscRegs = NUM_MISCREGS;
57
58const int NumIntArchRegs = NUM_INTREGS;
59const int NumIntRegs = NumIntArchRegs + NumMicroIntRegs + NumImplicitIntRegs;
60const int NumCCRegs = NUM_CCREGS;
61
62#define ISA_HAS_CC_REGS
63
64// Each 128 bit xmm register is broken into two effective 64 bit registers.
65// Add 8 for the indices that are mapped over the fp stack
66const int NumFloatRegs =
67    NumMMXRegs + 2 * NumXMMRegs + NumMicroFpRegs + 8;
68
69// These enumerate all the registers for dependence tracking.
70enum DependenceTags {
71    // FP_Reg_Base must be large enough to be bigger than any integer
72    // register index which has the IntFoldBit (1 << 6) set.  To be safe
73    // we just start at (1 << 7) == 128.
74    FP_Reg_Base = 128,
75    CC_Reg_Base = FP_Reg_Base + NumFloatRegs,
76    Misc_Reg_Base = CC_Reg_Base + NumCCRegs,
77    Max_Reg_Index = Misc_Reg_Base + NumMiscRegs
78};
79
80// semantically meaningful register indices
81//There is no such register in X86
82const int ZeroReg = NUM_INTREGS;
83const int StackPointerReg = INTREG_RSP;
84//X86 doesn't seem to have a link register
85const int ReturnAddressReg = 0;
86const int ReturnValueReg = INTREG_RAX;
87const int FramePointerReg = INTREG_RBP;
88
89// Some OS syscalls use a second register (rdx) to return a second
90// value
91const int SyscallPseudoReturnReg = INTREG_RDX;
92
93typedef RegVal IntReg;
94typedef uint64_t CCReg;
95typedef RegVal MiscReg;
96
97// dummy typedefs since we don't have vector regs
98constexpr unsigned NumVecElemPerVecReg = 2;
99using VecElem = uint32_t;
100using VecReg = ::VecRegT<VecElem, NumVecElemPerVecReg, false>;
101using ConstVecReg = ::VecRegT<VecElem, NumVecElemPerVecReg, true>;
102using VecRegContainer = VecReg::Container;
103// This has to be one to prevent warnings that are treated as errors
104constexpr unsigned NumVecRegs = 1;
105
106//These floating point types are correct for mmx, but not
107//technically for x87 (80 bits) or at all for xmm (128 bits)
108typedef FloatRegVal FloatReg;
109typedef RegVal FloatRegBits;
110
111} // namespace X86ISA
112
113#endif // __ARCH_X86_REGFILE_HH__
114