summaryrefslogtreecommitdiff
path: root/arch/mips/isa_traits.cc
blob: 19ef46291659b983be2591fca1a30121372e7704 (plain)
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
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
/*
 * 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.
 */

#include "arch/mips/isa_traits.hh"
#include "config/full_system.hh"
#include "cpu/static_inst.hh"
#include "sim/serialize.hh"
#include "base/bitfield.hh"

using namespace MipsISA;
using namespace std;


void
MipsISA::copyRegs(ExecContext *src, ExecContext *dest)
{
    /*fpcr = xc->readMiscReg(MipsISA::Fpcr_DepTag);
    uniq = xc->readMiscReg(MipsISA::Uniq_DepTag);
    lock_flag = xc->readMiscReg(MipsISA::Lock_Flag_DepTag);
    lock_addr = xc->readMiscReg(MipsISA::Lock_Addr_DepTag);

#if FULL_SYSTEM
    copyIprs(xc);
    #endif*/
}

void
MipsISA::MiscRegFile::copyMiscRegs(ExecContext *xc)
{
    /*fpcr = xc->readMiscReg(MipsISA::Fpcr_DepTag);
    uniq = xc->readMiscReg(MipsISA::Uniq_DepTag);
    lock_flag = xc->readMiscReg(MipsISA::Lock_Flag_DepTag);
    lock_addr = xc->readMiscReg(MipsISA::Lock_Addr_DepTag);

    #endif*/
}

uint64_t
MipsISA::fpConvert(double fp_val, ConvertType cvt_type)
{

    switch (cvt_type)
    {
      case SINGLE_TO_DOUBLE:
        double sdouble_val = fp_val;
        void  *sdouble_ptr = &sdouble_val;
        uint64_t sdp_bits  = *(uint64_t *) sdouble_ptr;
        return sdp_bits;

      case SINGLE_TO_WORD:
        int32_t sword_val  = (int32_t) fp_val;
        void  *sword_ptr   = &sword_val;
        uint64_t sword_bits= *(uint32_t *) sword_ptr;
        return sword_bits;

      case WORD_TO_SINGLE:
        float wfloat_val   = fp_val;
        void  *wfloat_ptr  = &wfloat_val;
        uint64_t wfloat_bits = *(uint32_t *) wfloat_ptr;
        return wfloat_bits;

      case WORD_TO_DOUBLE:
        double wdouble_val = fp_val;
        void  *wdouble_ptr = &wdouble_val;
        uint64_t wdp_bits  = *(uint64_t *) wdouble_ptr;
        return wdp_bits;

      default:
        panic("Invalid Floating Point Conversion Type (%d). See \"types.hh\" for List of Conversions\n",cvt_type);
        return 0;
    }
}

float
MipsISA::roundFP(float val)
{
    return 1.5;
}

float
MipsISA::roundFP(uint64_t val)
{
    return 1.5;
}

double
MipsISA::roundFP(double val)
{
    double trunc_val = trunc(val);
    double fraction = val - trunc_val;

    if (fraction < 0.5)
        return val;
    else
        return val + 1;
}

float
MipsISA::truncFP(float val)
{
    return 1.0;
}

double
MipsISA::truncFP(uint64_t val)
{
    int trunc_val = (int) val;
    return (double) trunc_val;
}

double
MipsISA::truncFP(double val)
{
    int trunc_val = (int) val;
    return (double) trunc_val;
}

bool
MipsISA::unorderedFP(float val)
{
    return false;
}

bool
MipsISA::unorderedFP(double val)
{
    return false;
}

bool
MipsISA::getFPConditionCode(int cc)
{
    return false;
}

void
MipsISA::setFPConditionCode(int num, bool val)
{
}

#if FULL_SYSTEM

static inline Addr
TruncPage(Addr addr)
{ return addr & ~(MipsISA::PageBytes - 1); }

static inline Addr
RoundPage(Addr addr)
{ return (addr + MipsISA::PageBytes - 1) & ~(MipsISA::PageBytes - 1); }
#endif

void
IntRegFile::serialize(std::ostream &os)
{
    SERIALIZE_ARRAY(regs, NumIntRegs);
}

void
IntRegFile::unserialize(Checkpoint *cp, const std::string &section)
{
    UNSERIALIZE_ARRAY(regs, NumIntRegs);
}

void
RegFile::serialize(std::ostream &os)
{
    intRegFile.serialize(os);
    //SERIALIZE_ARRAY(floatRegFile.q, NumFloatRegs);
    //SERIALIZE_SCALAR(miscRegs.fpcr);
    //SERIALIZE_SCALAR(miscRegs.uniq);
    //SERIALIZE_SCALAR(miscRegs.lock_flag);
    //SERIALIZE_SCALAR(miscRegs.lock_addr);
    SERIALIZE_SCALAR(pc);
    SERIALIZE_SCALAR(npc);
    SERIALIZE_SCALAR(nnpc);
#if FULL_SYSTEM
    SERIALIZE_ARRAY(palregs, NumIntRegs);
    SERIALIZE_ARRAY(ipr, NumInternalProcRegs);
    SERIALIZE_SCALAR(intrflag);
    SERIALIZE_SCALAR(pal_shadow);
#endif
}


void
RegFile::unserialize(Checkpoint *cp, const std::string &section)
{
    intRegFile.unserialize(cp, section);
    //UNSERIALIZE_ARRAY(floatRegFile.q, NumFloatRegs);
    //UNSERIALIZE_SCALAR(miscRegs.fpcr);
    //UNSERIALIZE_SCALAR(miscRegs.uniq);
    //UNSERIALIZE_SCALAR(miscRegs.lock_flag);
    //UNSERIALIZE_SCALAR(miscRegs.lock_addr);
    UNSERIALIZE_SCALAR(pc);
    UNSERIALIZE_SCALAR(npc);
    UNSERIALIZE_SCALAR(nnpc);
#if FULL_SYSTEM
    UNSERIALIZE_ARRAY(palregs, NumIntRegs);
    UNSERIALIZE_ARRAY(ipr, NumInternalProcRegs);
    UNSERIALIZE_SCALAR(intrflag);
    UNSERIALIZE_SCALAR(pal_shadow);
#endif
}


#if FULL_SYSTEM
void
PTE::serialize(std::ostream &os)
{
    SERIALIZE_SCALAR(tag);
    SERIALIZE_SCALAR(ppn);
    SERIALIZE_SCALAR(xre);
    SERIALIZE_SCALAR(xwe);
    SERIALIZE_SCALAR(asn);
    SERIALIZE_SCALAR(asma);
    SERIALIZE_SCALAR(fonr);
    SERIALIZE_SCALAR(fonw);
    SERIALIZE_SCALAR(valid);
}


void
PTE::unserialize(Checkpoint *cp, const std::string &section)
{
    UNSERIALIZE_SCALAR(tag);
    UNSERIALIZE_SCALAR(ppn);
    UNSERIALIZE_SCALAR(xre);
    UNSERIALIZE_SCALAR(xwe);
    UNSERIALIZE_SCALAR(asn);
    UNSERIALIZE_SCALAR(asma);
    UNSERIALIZE_SCALAR(fonr);
    UNSERIALIZE_SCALAR(fonw);
    UNSERIALIZE_SCALAR(valid);
}

#endif //FULL_SYSTEM