1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
|
/*
* Copyright (c) 2003-2005 The Regents of The University of Michigan
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef __ARCH_MIPS_FLOAT_REGFILE_HH__
#define __ARCH_MIPS_FLOAT_REGFILE_HH__
#include "arch/mips/types.hh"
#include "arch/mips/constants.hh"
#include "base/misc.hh"
#include "base/bitfield.hh"
#include "config/full_system.hh"
#include "sim/byteswap.hh"
#include "sim/faults.hh"
#include "sim/host.hh"
class Checkpoint;
class ExecContext;
class Regfile;
namespace MipsISA
{
class FloatRegFile
{
protected:
FloatReg32 regs[NumFloatRegs];
public:
void clear()
{
bzero(regs, sizeof(regs));
}
double readReg(int floatReg, int width)
{
switch(width)
{
case SingleWidth:
{
void *float_ptr = ®s[floatReg];
return *(float *) float_ptr;
}
case DoubleWidth:
{
uint64_t double_val = (FloatReg64)regs[floatReg + 1] << 32 | regs[floatReg];
void *double_ptr = &double_val;
return *(double *) double_ptr;
}
default:
panic("Attempted to read a %d bit floating point register!", width);
}
}
FloatRegBits readRegBits(int floatReg, int width)
{
if (floatReg < NumFloatArchRegs - 1) {
switch(width)
{
case SingleWidth:
return regs[floatReg];
case DoubleWidth:
return (FloatReg64)regs[floatReg + 1] << 32 | regs[floatReg];
default:
panic("Attempted to read a %d bit floating point register!", width);
}
} else {
if (width > SingleWidth)
assert("Control Regs are only 32 bits wide");
return regs[floatReg];
}
}
Fault setReg(int floatReg, const FloatReg &val, int width)
{
using namespace std;
switch(width)
{
case SingleWidth:
{
float temp = val;
void *float_ptr = &temp;
regs[floatReg] = *(FloatReg32 *) float_ptr;
break;
}
case DoubleWidth:
{
const void *double_ptr = &val;
FloatReg64 temp_double = *(FloatReg64 *) double_ptr;
regs[floatReg + 1] = bits(temp_double, 63, 32);
regs[floatReg] = bits(temp_double, 31, 0);
break;
}
default:
panic("Attempted to read a %d bit floating point register!", width);
}
return NoFault;
}
Fault setRegBits(int floatReg, const FloatRegBits &val, int width)
{
using namespace std;
switch(width)
{
case SingleWidth:
regs[floatReg] = val;
break;
case DoubleWidth:
regs[floatReg + 1] = bits(val, 63, 32);
regs[floatReg] = bits(val, 31, 0);
break;
default:
panic("Attempted to read a %d bit floating point register!", width);
}
return NoFault;
}
void serialize(std::ostream &os);
void unserialize(Checkpoint *cp, const std::string §ion);
};
} // namespace MipsISA
#endif
|
