150 lines
5 KiB
Text
150 lines
5 KiB
Text
// Copyright (c) 2006-2007 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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// Authors: Ali Saidi
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// Gabe Black
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// Steve Reinhardt
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// Declarations for execute() methods.
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def template BasicExecDeclare {{
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Fault execute(%(CPU_exec_context)s *, Trace::InstRecord *) const;
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}};
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// Definitions of execute methods that panic.
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def template BasicExecPanic {{
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Fault execute(%(CPU_exec_context)s *, Trace::InstRecord *) const
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{
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panic("Execute method called when it shouldn't!");
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M5_DUMMY_RETURN
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}
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}};
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// Basic instruction class declaration template.
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def template BasicDeclare {{
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/**
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* Static instruction class for "%(mnemonic)s".
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*/
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class %(class_name)s : public %(base_class)s
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{
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public:
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// Constructor.
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%(class_name)s(ExtMachInst machInst);
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%(BasicExecDeclare)s
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};
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}};
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// Basic instruction class constructor template.
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def template BasicConstructor {{
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inline %(class_name)s::%(class_name)s(ExtMachInst machInst)
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: %(base_class)s("%(mnemonic)s", machInst, %(op_class)s)
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{
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%(constructor)s;
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}
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}};
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// Basic instruction class execute method template.
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def template BasicExecute {{
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Fault %(class_name)s::execute(%(CPU_exec_context)s *xc,
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Trace::InstRecord *traceData) const
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{
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Fault fault = NoFault;
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%(fp_enable_check)s;
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%(op_decl)s;
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%(op_rd)s;
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%(code)s;
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if(fault == NoFault)
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{
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%(op_wb)s;
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}
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return fault;
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}
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}};
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// Basic decode template.
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def template BasicDecode {{
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return new %(class_name)s(machInst);
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}};
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// Basic decode template, passing mnemonic in as string arg to constructor.
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def template BasicDecodeWithMnemonic {{
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return new %(class_name)s("%(mnemonic)s", machInst);
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}};
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// The most basic instruction format... used only for a few misc. insts
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def format BasicOperate(code, *flags) {{
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code = filterDoubles(code)
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iop = InstObjParams(name, Name, 'SparcStaticInst', code, flags)
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header_output = BasicDeclare.subst(iop)
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decoder_output = BasicConstructor.subst(iop)
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decode_block = BasicDecode.subst(iop)
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exec_output = BasicExecute.subst(iop)
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}};
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def format FpBasic(code, *flags) {{
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fp_code = """
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Fsr |= bits(Fsr,4,0) << 5;
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Fsr = insertBits(Fsr,4,0,0);
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#if defined(__sun) || defined (__OpenBSD__)
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fp_rnd newrnd = FP_RN;
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switch (Fsr<31:30>) {
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case 0: newrnd = FP_RN; break;
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case 1: newrnd = FP_RZ; break;
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case 2: newrnd = FP_RP; break;
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case 3: newrnd = FP_RM; break;
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}
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fp_rnd oldrnd = fpsetround(newrnd);
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#else
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int newrnd = FE_TONEAREST;
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switch (Fsr<31:30>) {
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case 0: newrnd = FE_TONEAREST; break;
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case 1: newrnd = FE_TOWARDZERO; break;
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case 2: newrnd = FE_UPWARD; break;
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case 3: newrnd = FE_DOWNWARD; break;
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}
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int oldrnd = fegetround();
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fesetround(newrnd);
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#endif
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"""
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fp_code += code
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fp_code += """
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#if defined(__sun) || defined (__OpenBSD__)
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fpsetround(oldrnd);
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#else
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fesetround(oldrnd);
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#endif
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"""
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fp_code = filterDoubles(fp_code)
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iop = InstObjParams(name, Name, 'SparcStaticInst', fp_code, flags)
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header_output = BasicDeclare.subst(iop)
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decoder_output = BasicConstructor.subst(iop)
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decode_block = BasicDecode.subst(iop)
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exec_output = BasicExecute.subst(iop)
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}};
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