src/arch/mips/isa_traits.cc

   1 /*
   2  * Copyright (c) 2003-2005 The Regents of The University of Michigan
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are
   7  * met: redistributions of source code must retain the above copyright
   8  * notice, this list of conditions and the following disclaimer;
   9  * redistributions in binary form must reproduce the above copyright
  10  * notice, this list of conditions and the following disclaimer in the
  11  * documentation and/or other materials provided with the distribution;
  12  * neither the name of the copyright holders nor the names of its
  13  * contributors may be used to endorse or promote products derived from
  14  * this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  17  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  18  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  19  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  20  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  21  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  22  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  26  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  *
  28  * Authors: Gabe Black
  29  *          Korey Sewell
  30  */
  31
  32 #include "arch/mips/isa_traits.hh"
  33 #include "config/full_system.hh"
  34 #include "cpu/static_inst.hh"
  35 #include "sim/serialize.hh"
  36 #include "base/bitfield.hh"
  37
  38 using namespace MipsISA;
  39 using namespace std;
  40
  41
  42 void
  43 MipsISA::copyRegs(ExecContext *src, ExecContext *dest)
  44 {
  45     /*fpcr = xc->readMiscReg(MipsISA::Fpcr_DepTag);
  46     uniq = xc->readMiscReg(MipsISA::Uniq_DepTag);
  47     lock_flag = xc->readMiscReg(MipsISA::Lock_Flag_DepTag);
  48     lock_addr = xc->readMiscReg(MipsISA::Lock_Addr_DepTag);
  49
  50 #if FULL_SYSTEM
  51     copyIprs(xc);
  52     #endif*/
  53 }
  54
  55 void
  56 MipsISA::MiscRegFile::copyMiscRegs(ExecContext *xc)
  57 {
  58     /*fpcr = xc->readMiscReg(MipsISA::Fpcr_DepTag);
  59     uniq = xc->readMiscReg(MipsISA::Uniq_DepTag);
  60     lock_flag = xc->readMiscReg(MipsISA::Lock_Flag_DepTag);
  61     lock_addr = xc->readMiscReg(MipsISA::Lock_Addr_DepTag);
  62
  63     #endif*/
  64 }
  65
  66 uint64_t
  67 MipsISA::fpConvert(double fp_val, ConvertType cvt_type)
  68 {
  69
  70     switch (cvt_type)
  71     {
  72       case SINGLE_TO_DOUBLE:
  73         double sdouble_val = fp_val;
  74         void  *sdouble_ptr = &sdouble_val;
  75         uint64_t sdp_bits  = *(uint64_t *) sdouble_ptr;
  76         return sdp_bits;
  77
  78       case SINGLE_TO_WORD:
  79         int32_t sword_val  = (int32_t) fp_val;
  80         void  *sword_ptr   = &sword_val;
  81         uint64_t sword_bits= *(uint32_t *) sword_ptr;
  82         return sword_bits;
  83
  84       case WORD_TO_SINGLE:
  85         float wfloat_val   = fp_val;
  86         void  *wfloat_ptr  = &wfloat_val;
  87         uint64_t wfloat_bits = *(uint32_t *) wfloat_ptr;
  88         return wfloat_bits;
  89
  90       case WORD_TO_DOUBLE:
  91         double wdouble_val = fp_val;
  92         void  *wdouble_ptr = &wdouble_val;
  93         uint64_t wdp_bits  = *(uint64_t *) wdouble_ptr;
  94         return wdp_bits;
  95
  96       default:
  97         panic("Invalid Floating Point Conversion Type (%d). See \"types.hh\" for List of Conversions\n",cvt_type);
  98         return 0;
  99     }
 100 }
 101
 102 double
 103 MipsISA::roundFP(double val, int digits)
 104 {
 105     double digit_offset = pow(10.0,digits);
 106     val = val * digit_offset;
 107     val = val + 0.5;
 108     val = floor(val);
 109     val = val / digit_offset;
 110     return val;
 111 }
 112
 113 double
 114 MipsISA::truncFP(double val)
 115 {
 116     int trunc_val = (int) val;
 117     return (double) trunc_val;
 118 }
 119
 120 bool
 121 MipsISA::getFPConditionCode(uint32_t fcsr_reg, int cc)
 122 {
 123     //uint32_t cc_bits = xc->readFloatReg(35);
 124     return false;//regFile.floatRegfile.getConditionCode(cc);
 125 }
 126
 127 uint32_t
 128 MipsISA::makeCCVector(uint32_t fcsr, int num, bool val)
 129 {
 130     int shift = (num == 0) ? 22 : num + 23;
 131
 132     fcsr = fcsr | (val << shift);
 133
 134     return fcsr;
 135 }
 136
 137 #if FULL_SYSTEM
 138
 139 static inline Addr
 140 TruncPage(Addr addr)
 141 { return addr & ~(MipsISA::PageBytes - 1); }
 142
 143 static inline Addr
 144 RoundPage(Addr addr)
 145 { return (addr + MipsISA::PageBytes - 1) & ~(MipsISA::PageBytes - 1); }
 146 #endif
 147
 148 void
 149 IntRegFile::serialize(std::ostream &os)
 150 {
 151     SERIALIZE_ARRAY(regs, NumIntRegs);
 152 }
 153
 154 void
 155 IntRegFile::unserialize(Checkpoint *cp, const std::string &section)
 156 {
 157     UNSERIALIZE_ARRAY(regs, NumIntRegs);
 158 }
 159
 160 void
 161 RegFile::serialize(std::ostream &os)
 162 {
 163     intRegFile.serialize(os);
 164     //SERIALIZE_ARRAY(floatRegFile.q, NumFloatRegs);
 165     //SERIALIZE_SCALAR(miscRegs.fpcr);
 166     //SERIALIZE_SCALAR(miscRegs.uniq);
 167     //SERIALIZE_SCALAR(miscRegs.lock_flag);
 168     //SERIALIZE_SCALAR(miscRegs.lock_addr);
 169     SERIALIZE_SCALAR(pc);
 170     SERIALIZE_SCALAR(npc);
 171     SERIALIZE_SCALAR(nnpc);
 172 #if FULL_SYSTEM
 173     SERIALIZE_ARRAY(palregs, NumIntRegs);
 174     SERIALIZE_ARRAY(ipr, NumInternalProcRegs);
 175     SERIALIZE_SCALAR(intrflag);
 176     SERIALIZE_SCALAR(pal_shadow);
 177 #endif
 178 }
 179
 180
 181 void
 182 RegFile::unserialize(Checkpoint *cp, const std::string &section)
 183 {
 184     intRegFile.unserialize(cp, section);
 185     //UNSERIALIZE_ARRAY(floatRegFile.q, NumFloatRegs);
 186     //UNSERIALIZE_SCALAR(miscRegs.fpcr);
 187     //UNSERIALIZE_SCALAR(miscRegs.uniq);
 188     //UNSERIALIZE_SCALAR(miscRegs.lock_flag);
 189     //UNSERIALIZE_SCALAR(miscRegs.lock_addr);
 190     UNSERIALIZE_SCALAR(pc);
 191     UNSERIALIZE_SCALAR(npc);
 192     UNSERIALIZE_SCALAR(nnpc);
 193 #if FULL_SYSTEM
 194     UNSERIALIZE_ARRAY(palregs, NumIntRegs);
 195     UNSERIALIZE_ARRAY(ipr, NumInternalProcRegs);
 196     UNSERIALIZE_SCALAR(intrflag);
 197     UNSERIALIZE_SCALAR(pal_shadow);
 198 #endif
 199 }
 200
 201
 202 #if FULL_SYSTEM
 203 void
 204 PTE::serialize(std::ostream &os)
 205 {
 206     SERIALIZE_SCALAR(tag);
 207     SERIALIZE_SCALAR(ppn);
 208     SERIALIZE_SCALAR(xre);
 209     SERIALIZE_SCALAR(xwe);
 210     SERIALIZE_SCALAR(asn);
 211     SERIALIZE_SCALAR(asma);
 212     SERIALIZE_SCALAR(fonr);
 213     SERIALIZE_SCALAR(fonw);
 214     SERIALIZE_SCALAR(valid);
 215 }
 216
 217
 218 void
 219 PTE::unserialize(Checkpoint *cp, const std::string &section)
 220 {
 221     UNSERIALIZE_SCALAR(tag);
 222     UNSERIALIZE_SCALAR(ppn);
 223     UNSERIALIZE_SCALAR(xre);
 224     UNSERIALIZE_SCALAR(xwe);
 225     UNSERIALIZE_SCALAR(asn);
 226     UNSERIALIZE_SCALAR(asma);
 227     UNSERIALIZE_SCALAR(fonr);
 228     UNSERIALIZE_SCALAR(fonw);
 229     UNSERIALIZE_SCALAR(valid);
 230 }
 231
 232 #endif //FULL_SYSTEM