2 * Copyright (c) 2003-2005 The Regents of The University of Michigan
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14 * this software without specific prior written permission.
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32 #include "arch/sparc/intregfile.hh"
33 #include "base/trace.hh"
34 #include "sim/serialize.hh"
36 using namespace SparcISA
;
41 string
SparcISA::getIntRegName(RegIndex index
)
43 static std::string intRegName
[NumIntRegs
] =
44 {"g0", "g1", "g2", "g3", "g4", "g5", "g6", "g7",
45 "o0", "o1", "o2", "o3", "o4", "o5", "o6", "o7",
46 "l0", "l1", "l2", "l3", "l4", "l5", "l6", "l7",
47 "i0", "i1", "i2", "i3", "i4", "i5", "i6", "i7"};
48 return intRegName
[index
];
51 int IntRegFile::flattenIndex(int reg
)
53 int flatIndex
= offset
[reg
>> FrameOffsetBits
]
54 | (reg
& FrameOffsetMask
);
55 DPRINTF(Sparc
, "Flattened index %d into %d.\n", reg
, flatIndex
);
59 void IntRegFile::clear()
62 for (x
= 0; x
< MaxGL
; x
++)
63 memset(regGlobals
[x
], 0, sizeof(IntReg
) * RegsPerFrame
);
64 for(int x
= 0; x
< 2 * NWindows
; x
++)
65 bzero(regSegments
[x
], sizeof(IntReg
) * RegsPerFrame
);
68 IntRegFile::IntRegFile()
71 regView
[Globals
] = regGlobals
[0];
76 IntReg
IntRegFile::readReg(int intReg
)
79 regView
[intReg
>> FrameOffsetBits
][intReg
& FrameOffsetMask
];
80 DPRINTF(Sparc
, "Read register %d = 0x%x\n", intReg
, val
);
84 Fault
IntRegFile::setReg(int intReg
, const IntReg
&val
)
88 DPRINTF(Sparc
, "Wrote register %d = 0x%x\n", intReg
, val
);
89 regView
[intReg
>> FrameOffsetBits
][intReg
& FrameOffsetMask
] = val
;
94 //This doesn't effect the actual CWP register.
95 //It's purpose is to adjust the view of the register file
96 //to what it would be if CWP = cwp.
97 void IntRegFile::setCWP(int cwp
)
99 int index
= ((NWindows
- cwp
) % NWindows
) * 2;
100 offset
[Outputs
] = FrameOffset
+ (index
* RegsPerFrame
);
101 offset
[Locals
] = FrameOffset
+ ((index
+1) * RegsPerFrame
);
102 offset
[Inputs
] = FrameOffset
+
103 (((index
+2) % (NWindows
* 2)) * RegsPerFrame
);
104 regView
[Outputs
] = regSegments
[index
];
105 regView
[Locals
] = regSegments
[index
+1];
106 regView
[Inputs
] = regSegments
[(index
+2) % (NWindows
* 2)];
108 DPRINTF(Sparc
, "Changed the CWP value to %d\n", cwp
);
111 void IntRegFile::setGlobals(int gl
)
113 DPRINTF(Sparc
, "Now using %d globals", gl
);
115 regView
[Globals
] = regGlobals
[gl
];
116 offset
[Globals
] = RegGlobalOffset
+ gl
* RegsPerFrame
;
119 void IntRegFile::serialize(std::ostream
&os
)
122 for(x
= 0; x
< MaxGL
; x
++)
123 SERIALIZE_ARRAY(regGlobals
[x
], RegsPerFrame
);
124 for(x
= 0; x
< 2 * NWindows
; x
++)
125 SERIALIZE_ARRAY(regSegments
[x
], RegsPerFrame
);
128 void IntRegFile::unserialize(Checkpoint
*cp
, const std::string
§ion
)
131 for(x
= 0; x
< MaxGL
; x
++)
132 UNSERIALIZE_ARRAY(regGlobals
[x
], RegsPerFrame
);
133 for(unsigned int x
= 0; x
< 2 * NWindows
; x
++)
134 UNSERIALIZE_ARRAY(regSegments
[x
], RegsPerFrame
);