| /* |
| * 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. |
| * |
| * Authors: Gabe Black |
| * Korey Sewell |
| */ |
| |
| #include "arch/mips/regfile/float_regfile.hh" |
| #include "sim/serialize.hh" |
| |
| using namespace MipsISA; |
| using namespace std; |
| |
| void |
| FloatRegFile::clear() |
| { |
| bzero(®s, sizeof(regs)); |
| } |
| |
| double |
| FloatRegFile::readReg(int floatReg, int width, unsigned tid) |
| { |
| 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 |
| FloatRegFile::readRegBits(int floatReg, int width, unsigned tid) |
| { |
| 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 |
| FloatRegFile::setReg(int floatReg, const FloatRegVal &val, int width, unsigned tid) |
| { |
| 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 |
| FloatRegFile::setRegBits(int floatReg, const FloatRegBits &val, int width, unsigned tid) |
| { |
| 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 |
| FloatRegFile::serialize(std::ostream &os) |
| { |
| SERIALIZE_ARRAY(regs, NumFloatRegs); |
| } |
| |
| void |
| FloatRegFile::unserialize(Checkpoint *cp, const std::string §ion) |
| { |
| UNSERIALIZE_ARRAY(regs, NumFloatRegs); |
| } |