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/*
* Copyright (c) 2007 The Hewlett-Packard Development Company
* All rights reserved.
*
* The license below extends only to copyright in the software and shall
* not be construed as granting a license to any other intellectual
* property including but not limited to intellectual property relating
* to a hardware implementation of the functionality of the software
* licensed hereunder. You may use the software subject to the license
* terms below provided that you ensure that this notice is replicated
* unmodified and in its entirety in all distributions of the software,
* modified or unmodified, in source code or in binary form.
*
* 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 <sstream>
#include "arch/x86/isa.hh"
#include "arch/x86/regs/misc.hh"
namespace gem5
{
namespace X86ISA
{
std::string
FlatFloatRegClassOps::regName(const RegId &id) const
{
std::ostringstream ss;
RegIndex reg_idx = id.index();
if (reg_idx < NumMMXRegs) {
ccprintf(ss, "%%mmx%d", reg_idx);
return ss.str();
}
reg_idx -= NumMMXRegs;
if (reg_idx < NumXMMRegs * 2) {
ccprintf(ss, "%%xmm%d_%s", reg_idx / 2,
(reg_idx % 2) ? "high": "low");
return ss.str();
}
reg_idx -= NumXMMRegs * 2;
if (reg_idx < NumMicroFpRegs) {
ccprintf(ss, "%%ufp%d", reg_idx);
return ss.str();
}
reg_idx -= NumMicroFpRegs;
ccprintf(ss, "%%st(%d)", reg_idx);
return ss.str();
}
RegId
FloatRegClassOps::flatten(const BaseISA &isa, const RegId &id) const
{
RegIndex idx = id.index();
if (idx >= float_reg::NumRegs) {
auto &x86_isa = static_cast<const X86ISA::ISA &>(isa);
auto x87_top = x86_isa.readMiscRegNoEffect(misc_reg::X87Top);
idx = float_reg::stack(idx - float_reg::NumRegs, x87_top);
}
return {flatFloatRegClass, idx};
}
} // namespace X86ISA
} // namespace gem5