97429d8eee
Edit the convert_and_round function which access FloatRegFile
arch/isa_parser.py:
recognize when we are writing a 'uint64_t' FloatReg and set the width appropriately
arch/mips/isa/decoder.isa:
Send a 'float' to the convert function instead of a unsigned word. Do this so we dont have to worry about the
bit manipulation ourselves. We can just concern ourselves with values.
Use unsigned double to get movd...
arch/mips/isa/formats/fp.isa:
float debug statement
arch/mips/isa_traits.cc:
add different versions of convert_and_round functions
arch/mips/isa_traits.hh:
Use an array of uint32_t unsigned integers to represent the Floating Point Regfile
configs/test/hello_mips:
basic FP program
cpu/simple/cpu.hh:
spacing
--HG--
extra : convert_revision : a6fca91ad6365c83025f1131d71fa1b8ee76d7bc
448 lines
11 KiB
C++
448 lines
11 KiB
C++
/*
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* Copyright (c) 2003-2005 The Regents of The University of Michigan
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "arch/mips/isa_traits.hh"
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#include "config/full_system.hh"
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#include "cpu/static_inst.hh"
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#include "sim/serialize.hh"
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#include "base/bitfield.hh"
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using namespace MipsISA;
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using namespace std;
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uint64_t
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MipsISA::convert_and_round(uint32_t fp_val, ConvertType cvt_type, int rnd_mode)
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{
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uint64_t ret_val = 0;
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switch (cvt_type)
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{
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case SINGLE_TO_DOUBLE:
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uint64_t single_sign = fp_val & 0x80000000;
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uint64_t single_exp = (fp_val & 0x7F800000) >> 22;
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single_exp -= 127;
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uint64_t single_mantissa = fp_val & 0x007FFFFF;
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uint64_t double_exp = single_exp + 1023;
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double_exp = double_exp << 51;
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uint64_t double_val = single_sign << 63 | double_exp | single_mantissa;
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return double_val;
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default:
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panic("Invalid Floating Point Conversion Type (%d) being used.\n",cvt_type);
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return ret_val;
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}
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}
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uint64_t
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MipsISA::convert_and_round(uint64_t fp_val, ConvertType cvt_type, int rnd_mode)
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{
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uint64_t ret_val = 0;
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switch (cvt_type)
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{
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case SINGLE_TO_DOUBLE:
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uint64_t single_sign = fp_val & 0x80000000;
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uint64_t single_exp = (fp_val & 0x7F800000) >> 22;
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single_exp -= 127;
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uint64_t single_mantissa = fp_val & 0x007FFFFF;
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uint64_t double_exp = single_exp + 1023;
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double_exp = double_exp << 51;
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uint64_t double_val = single_sign << 63 | double_exp | single_mantissa;
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return double_val;
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default:
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panic("Invalid Floating Point Conversion Type (%d) being used.\n",cvt_type);
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return ret_val;
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}
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}
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uint64_t
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MipsISA::convert_and_round(float fp_val, ConvertType cvt_type, int rnd_mode)
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{
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void * ptr = &fp_val;
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uint32_t fp_bits = * (uint32_t *) ptr;
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cout << "Converting " << fp_val << " (" << hex << fp_bits << ") " << endl;
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uint64_t ret_val = 0;
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switch (cvt_type)
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{
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case SINGLE_TO_DOUBLE:
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double double_val = fp_val;
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void *double_ptr = &double_val;
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uint64_t dp_bits = *(uint64_t *) double_ptr ;
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cout << "To " << double_val << " (" << hex << dp_bits << ") " << endl;
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double_ptr = &dp_bits;
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cout << "Testing: " << *(double *) double_ptr << endl;
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return dp_bits;
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default:
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panic("Invalid Floating Point Conversion Type (%d) being used.\n",cvt_type);
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return ret_val;
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}
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}
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void
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MipsISA::copyRegs(ExecContext *src, ExecContext *dest)
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{
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/*fpcr = xc->readMiscReg(MipsISA::Fpcr_DepTag);
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uniq = xc->readMiscReg(MipsISA::Uniq_DepTag);
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lock_flag = xc->readMiscReg(MipsISA::Lock_Flag_DepTag);
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lock_addr = xc->readMiscReg(MipsISA::Lock_Addr_DepTag);
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#if FULL_SYSTEM
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copyIprs(xc);
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#endif*/
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}
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void
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MipsISA::MiscRegFile::copyMiscRegs(ExecContext *xc)
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{
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/*fpcr = xc->readMiscReg(MipsISA::Fpcr_DepTag);
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uniq = xc->readMiscReg(MipsISA::Uniq_DepTag);
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lock_flag = xc->readMiscReg(MipsISA::Lock_Flag_DepTag);
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lock_addr = xc->readMiscReg(MipsISA::Lock_Addr_DepTag);
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#if FULL_SYSTEM
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copyIprs(xc);
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#endif*/
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}
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void MipsISA::RegFile::coldReset()
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{
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//CP0 Random Reg:
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//Randomly generated index into the TLB array
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/*miscRegs[Random] = 0x0000003f;
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//CP0 Wired Reg.
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miscRegs[Wired] = 0x0000000;
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//CP0 HWRENA
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miscRegs[HWRena] = 0x0000000;
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//CP0 Status Reg.
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miscRegs[Status] = 0x0400004;
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//CP0 INTCNTL
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miscRegs[IntCtl] = 0xfc00000;
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//CP0 SRSCNTL
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miscRegs[SRSCtl] = 0x0c00000;
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//CP0 SRSMAP
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miscRegs[SRSMap] = 0x0000000;
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//CP0 Cause
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miscRegs[Cause] = 0x0000000;
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//CP0 Processor ID
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miscRegs[PrId] = 0x0019300;
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//CP0 EBASE
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miscRegs[EBase] = 0x8000000;
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//CP0 Config Reg.
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miscRegs[Config] = 0x80040482;
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//CP0 Config 1 Reg.
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miscRegs[Config1] = 0xfee3719e;
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//CP0 Config 2 Reg.
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miscRegs[Config2] = 0x8000000;
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//CP0 Config 3 Reg.
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miscRegs[Config3] = 0x0000020;
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//CP0 Config 7 Reg.
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miscRegs[Config7] = 0x0000000;
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//CP0 Debug
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miscRegs[Debug] = 0x0201800;
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//CP0 PERFCNTL1
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miscRegs[PerfCnt0] = 0x0000000;
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//CP0 PERFCNTL2
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miscRegs[PerfCnt1] = 0x0000000;*/
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}
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void RegFile::createCP0Regs()
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{
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//Resize Coprocessor Register Banks to
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// the number specified in MIPS32K VOL.III
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// Chapter 8
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/*
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//Cop-0 Regs. Bank 0: Index,
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miscRegs[0].resize(4);
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//Cop-0 Regs. Bank 1:
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miscRegs[1].resize(8);
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//Cop-0 Regs. Bank 2:
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miscRegs[2].resize(8);
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//Cop-0 Regs. Bank 3:
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miscRegs[3].resize(1);
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//Cop-0 Regs. Bank 4:
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miscRegs[4].resize(2);
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//Cop-0 Regs. Bank 5:
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miscRegs[5].resize(2);
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//Cop-0 Regs. Bank 6:
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miscRegs[6].resize(6);
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//Cop-0 Regs. Bank 7:
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miscRegs[7].resize(1);
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//Cop-0 Regs. Bank 8:
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miscRegs[8].resize(1);
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//Cop-0 Regs. Bank 9:
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miscRegs[9].resize(1);
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//Cop-0 Regs. Bank 10:
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miscRegs[10].resize(1);
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//Cop-0 Regs. Bank 11:
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miscRegs[11].resize(1);
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//Cop-0 Regs. Bank 12:
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miscRegs[12].resize(4);
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//Cop-0 Regs. Bank 13:
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miscRegs[13].resize(1);
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//Cop-0 Regs. Bank 14:
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miscRegs[14].resize(1);
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//Cop-0 Regs. Bank 15:
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miscRegs[15].resize(2);
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//Cop-0 Regs. Bank 16:
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miscRegs[16].resize(4);
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//Cop-0 Regs. Bank 17:
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miscRegs[17].resize(1);
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//Cop-0 Regs. Bank 18:
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miscRegs[18].resize(8);
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//Cop-0 Regs. Bank 19:
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miscRegs[19].resize(8);
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//Cop-0 Regs. Bank 20:
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miscRegs[20].resize(1);
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case PerfCnt0: panic("Accessing Unimplemented CP0 Register"); break;
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case PerfCnt1: panic("Accessing Unimplemented CP0 Register"); break;
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case PerfCnt2: panic("Accessing Unimplemented CP0 Register"); break;
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case PerfCnt3: panic("Accessing Unimplemented CP0 Register"); break;
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//Cop-0 Regs. Bank 21:
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//miscRegs[21].resize(1);
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//Reserved for future extensions
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//Cop-0 Regs. Bank 22:
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//miscRegs[22].resize(4);
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//Available for implementation dependent use
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//Cop-0 Regs. Bank 23:
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miscRegs[23].resize(5);
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//Cop-0 Regs. Bank 24:
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miscRegs[24].resize(1);
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//Cop-0 Regs. Bank 25:
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miscRegs[25].resize(8);
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//Cop-0 Regs. Bank 26:
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miscRegs[26].resize(1);
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//Cop-0 Regs. Bank 27:
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miscRegs[27].resize(4);
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//Cop-0 Regs. Bank 28:
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miscRegs[28].resize(8);
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//Cop-0 Regs. Bank 29:
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miscRegs[29].resize(8);
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//Cop-0 Regs. Bank 30:
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miscRegs[30].resize(1);
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//Cop-0 Regs. Bank 31:
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miscRegs[31].resize(1);*/
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}
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const Addr MipsISA::PageShift = 13;
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const Addr MipsISA::PageBytes = ULL(1) << PageShift;
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const Addr MipsISA::PageMask = ~(PageBytes - 1);
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const Addr MipsISA::PageOffset = PageBytes - 1;
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#if FULL_SYSTEM
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////////////////////////////////////////////////////////////////////////
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//
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// Translation stuff
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//
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const Addr MipsISA::PteShift = 3;
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const Addr MipsISA::NPtePageShift = PageShift - PteShift;
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const Addr MipsISA::NPtePage = ULL(1) << NPtePageShift;
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const Addr MipsISA::PteMask = NPtePage - 1;
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// User Virtual
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const Addr MipsISA::USegBase = ULL(0x0);
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const Addr MipsISA::USegEnd = ULL(0x000003ffffffffff);
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// Kernel Direct Mapped
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const Addr MipsISA::K0SegBase = ULL(0xfffffc0000000000);
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const Addr MipsISA::K0SegEnd = ULL(0xfffffdffffffffff);
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// Kernel Virtual
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const Addr MipsISA::K1SegBase = ULL(0xfffffe0000000000);
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const Addr MipsISA::K1SegEnd = ULL(0xffffffffffffffff);
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#endif
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// Mips UNOP (sll r0,r0,r0)
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const MachInst MipsISA::NoopMachInst = 0x00000000;
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static inline Addr
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TruncPage(Addr addr)
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{ return addr & ~(MipsISA::PageBytes - 1); }
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static inline Addr
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RoundPage(Addr addr)
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{ return (addr + MipsISA::PageBytes - 1) & ~(MipsISA::PageBytes - 1); }
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void
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IntRegFile::serialize(std::ostream &os)
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{
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SERIALIZE_ARRAY(regs, NumIntRegs);
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}
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void
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IntRegFile::unserialize(Checkpoint *cp, const std::string §ion)
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{
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UNSERIALIZE_ARRAY(regs, NumIntRegs);
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}
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void
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RegFile::serialize(std::ostream &os)
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{
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intRegFile.serialize(os);
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//SERIALIZE_ARRAY(floatRegFile.q, NumFloatRegs);
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//SERIALIZE_SCALAR(miscRegs.fpcr);
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//SERIALIZE_SCALAR(miscRegs.uniq);
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//SERIALIZE_SCALAR(miscRegs.lock_flag);
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//SERIALIZE_SCALAR(miscRegs.lock_addr);
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SERIALIZE_SCALAR(pc);
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SERIALIZE_SCALAR(npc);
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SERIALIZE_SCALAR(nnpc);
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#if FULL_SYSTEM
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SERIALIZE_ARRAY(palregs, NumIntRegs);
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SERIALIZE_ARRAY(ipr, NumInternalProcRegs);
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SERIALIZE_SCALAR(intrflag);
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SERIALIZE_SCALAR(pal_shadow);
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#endif
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}
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void
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RegFile::unserialize(Checkpoint *cp, const std::string §ion)
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{
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intRegFile.unserialize(cp, section);
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//UNSERIALIZE_ARRAY(floatRegFile.q, NumFloatRegs);
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//UNSERIALIZE_SCALAR(miscRegs.fpcr);
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//UNSERIALIZE_SCALAR(miscRegs.uniq);
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//UNSERIALIZE_SCALAR(miscRegs.lock_flag);
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//UNSERIALIZE_SCALAR(miscRegs.lock_addr);
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UNSERIALIZE_SCALAR(pc);
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UNSERIALIZE_SCALAR(npc);
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UNSERIALIZE_SCALAR(nnpc);
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#if FULL_SYSTEM
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UNSERIALIZE_ARRAY(palregs, NumIntRegs);
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UNSERIALIZE_ARRAY(ipr, NumInternalProcRegs);
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UNSERIALIZE_SCALAR(intrflag);
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UNSERIALIZE_SCALAR(pal_shadow);
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#endif
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}
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#if FULL_SYSTEM
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void
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PTE::serialize(std::ostream &os)
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{
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SERIALIZE_SCALAR(tag);
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SERIALIZE_SCALAR(ppn);
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SERIALIZE_SCALAR(xre);
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SERIALIZE_SCALAR(xwe);
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SERIALIZE_SCALAR(asn);
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SERIALIZE_SCALAR(asma);
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SERIALIZE_SCALAR(fonr);
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SERIALIZE_SCALAR(fonw);
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SERIALIZE_SCALAR(valid);
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}
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void
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PTE::unserialize(Checkpoint *cp, const std::string §ion)
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{
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UNSERIALIZE_SCALAR(tag);
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UNSERIALIZE_SCALAR(ppn);
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UNSERIALIZE_SCALAR(xre);
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UNSERIALIZE_SCALAR(xwe);
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UNSERIALIZE_SCALAR(asn);
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UNSERIALIZE_SCALAR(asma);
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UNSERIALIZE_SCALAR(fonr);
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UNSERIALIZE_SCALAR(fonw);
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UNSERIALIZE_SCALAR(valid);
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}
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#endif //FULL_SYSTEM
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