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Diffstat (limited to 'src/arch/mips/regfile/float_regfile.cc')
-rw-r--r-- | src/arch/mips/regfile/float_regfile.cc | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/src/arch/mips/regfile/float_regfile.cc b/src/arch/mips/regfile/float_regfile.cc new file mode 100644 index 000000000..122d7c229 --- /dev/null +++ b/src/arch/mips/regfile/float_regfile.cc @@ -0,0 +1,152 @@ +/* + * 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); +} |