registers.hh revision 9918:2c7219e2d999 
1/*
2 * Copyright (c) 2007 The Hewlett-Packard Development Company
3 * Copyright (c) 2013 Advanced Micro Devices, Inc.
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5 *
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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
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24 * this software without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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38 * Authors: Gabe Black
39 */
40
41#ifndef __ARCH_X86_REGISTERS_HH__
42#define __ARCH_X86_REGISTERS_HH__
43
44#include "arch/x86/generated/max_inst_regs.hh"
45#include "arch/x86/regs/int.hh"
46#include "arch/x86/regs/misc.hh"
47#include "arch/x86/x86_traits.hh"
48
49namespace X86ISA
50{
51using X86ISAInst::MaxInstSrcRegs;
52using X86ISAInst::MaxInstDestRegs;
53using X86ISAInst::MaxMiscDestRegs;
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.
62// Add 8 for the indices that are mapped over the fp stack
63const int NumFloatRegs =
64    NumMMXRegs + 2 * NumXMMRegs + NumMicroFpRegs + 8;
65
66// These enumerate all the registers for dependence tracking.
67enum DependenceTags {
68    // FP_Reg_Base must be large enough to be bigger than any integer
69    // register index which has the IntFoldBit (1 << 6) set.  To be safe
70    // we just start at (1 << 7) == 128.
71    FP_Reg_Base = 128,
72    Misc_Reg_Base = FP_Reg_Base + NumFloatRegs,
73    Max_Reg_Index = Misc_Reg_Base + NumMiscRegs
74};
75
76// semantically meaningful register indices
77//There is no such register in X86
78const int ZeroReg = NUM_INTREGS;
79const int StackPointerReg = INTREG_RSP;
80//X86 doesn't seem to have a link register
81const int ReturnAddressReg = 0;
82const int ReturnValueReg = INTREG_RAX;
83const int FramePointerReg = INTREG_RBP;
84
85// Some OS syscalls use a second register (rdx) to return a second
86// value
87const int SyscallPseudoReturnReg = INTREG_RDX;
88
89typedef uint64_t IntReg;
90//XXX Should this be a 128 bit structure for XMM memory ops?
91typedef uint64_t LargestRead;
92typedef uint64_t MiscReg;
93
94//These floating point types are correct for mmx, but not
95//technically for x87 (80 bits) or at all for xmm (128 bits)
96typedef double FloatReg;
97typedef uint64_t FloatRegBits;
98typedef union
99{
100    IntReg intReg;
101    FloatReg fpReg;
102    MiscReg ctrlReg;
103} AnyReg;
104
105typedef uint16_t RegIndex;
106
107} // namespace X86ISA
108
109#endif // __ARCH_X86_REGFILE_HH__
110