util.isa

来自「M5,一个功能强大的多处理器系统模拟器.很多针对处理器架构,性能的研究都使用它作」· ISA 代码 · 共 156 行

// -*- mode:c++ -*-

//Copyright (c) 2003, 2004, 2005
//The Regents of The University of Michigan
//All Rights Reserved

//This code is part of the M5 simulator.

//Permission is granted to use, copy, create derivative works and
//redistribute this software and such derivative works for any purpose,
//so long as the copyright notice above, this grant of permission, and
//the disclaimer below appear in all copies made; and so long as the
//name of The University of Michigan is not used in any advertising or
//publicity pertaining to the use or distribution of this software
//without specific, written prior authorization.

//THIS SOFTWARE IS PROVIDED AS IS, WITHOUT REPRESENTATION FROM THE
//UNIVERSITY OF MICHIGAN AS TO ITS FITNESS FOR ANY PURPOSE, AND WITHOUT
//WARRANTY BY THE UNIVERSITY OF MICHIGAN OF ANY KIND, EITHER EXPRESS OR
//IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED WARRANTIES OF
//MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE REGENTS OF
//THE UNIVERSITY OF MICHIGAN SHALL NOT BE LIABLE FOR ANY DAMAGES,
//INCLUDING DIRECT, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
//DAMAGES, WITH RESPECT TO ANY CLAIM ARISING OUT OF OR IN CONNECTION
//WITH THE USE OF THE SOFTWARE, EVEN IF IT HAS BEEN OR IS HEREAFTER
//ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

//Authors: Steven K. Reinhardt

// Copyright (c) 2007 MIPS Technologies, Inc.  All Rights Reserved

//  This software is part of the M5 simulator.

//  THIS IS A LEGAL AGREEMENT.  BY DOWNLOADING, USING, COPYING, CREATING
//  DERIVATIVE WORKS, AND/OR DISTRIBUTING THIS SOFTWARE YOU ARE AGREEING
//  TO THESE TERMS AND CONDITIONS.

//  Permission is granted to use, copy, create derivative works and
//  distribute this software and such derivative works for any purpose,
//  so long as (1) the copyright notice above, this grant of permission,
//  and the disclaimer below appear in all copies and derivative works
//  made, (2) the copyright notice above is augmented as appropriate to
//  reflect the addition of any new copyrightable work in a derivative
//  work (e.g., Copyright (c) <Publication Year> Copyright Owner), and (3)
//  the name of MIPS Technologies, Inc. ($(B!H(BMIPS$(B!I(B) is not used in any
//  advertising or publicity pertaining to the use or distribution of
//  this software without specific, written prior authorization.

//  THIS SOFTWARE IS PROVIDED $(B!H(BAS IS.$(B!I(B  MIPS MAKES NO WARRANTIES AND
//  DISCLAIMS ALL WARRANTIES, WHETHER EXPRESS, STATUTORY, IMPLIED OR
//  OTHERWISE, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
//  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND
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//  ANY KIND OR NATURE, ARISING OUT OF OR IN CONNECTION WITH THIS AGREEMENT,
//  THIS SOFTWARE AND/OR THE USE OF THIS SOFTWARE, WHETHER SUCH LIABILITY
//  IS ASSERTED ON THE BASIS OF CONTRACT, TORT (INCLUDING NEGLIGENCE OR
//  STRICT LIABILITY), OR OTHERWISE, EVEN IF MIPS HAS BEEN WARNED OF THE
//  POSSIBILITY OF ANY SUCH LOSS OR DAMAGE IN ADVANCE.

//Authors: Korey L. Sewell
//

let {{
def LoadStoreBase(name, Name, ea_code, memacc_code, mem_flags, inst_flags,
		  postacc_code = '', base_class = 'Memory',
		  decode_template = BasicDecode, exec_template_base = ''):
    # Make sure flags are in lists (convert to lists if not).
    mem_flags = makeList(mem_flags)
    inst_flags = makeList(inst_flags)

    # add hook to get effective addresses into execution trace output.
    ea_code += '\nif (traceData) { traceData->setAddr(EA); }\n'

    # Some CPU models execute the memory operation as an atomic unit,
    # while others want to separate them into an effective address
    # computation and a memory access operation.  As a result, we need
    # to generate three StaticInst objects.  Note that the latter two
    # are nested inside the larger "atomic" one.

    # Generate InstObjParams for each of the three objects.  Note that
    # they differ only in the set of code objects contained (which in
    # turn affects the object's overall operand list).
    iop = InstObjParams(name, Name, base_class,
                        { 'ea_code':ea_code, 'memacc_code':memacc_code, 'postacc_code':postacc_code },
                        inst_flags)
    ea_iop = InstObjParams(name, Name, base_class,
                        { 'ea_code':ea_code },
                        inst_flags)
    memacc_iop = InstObjParams(name, Name, base_class,
                        { 'memacc_code':memacc_code, 'postacc_code':postacc_code },
                        inst_flags)

    if mem_flags:
        s = '\n\tmemAccessFlags = ' + string.join(mem_flags, '|') + ';'
        iop.constructor += s
        memacc_iop.constructor += s

    # select templates

    # The InitiateAcc template is the same for StoreCond templates as the
    # corresponding Store template..
    StoreCondInitiateAcc = StoreInitiateAcc

    memAccExecTemplate = eval(exec_template_base + 'MemAccExecute')
    fullExecTemplate = eval(exec_template_base + 'Execute')
    initiateAccTemplate = eval(exec_template_base + 'InitiateAcc')
    completeAccTemplate = eval(exec_template_base + 'CompleteAcc')
    eaCompExecuteTemplate = eval('EACompExecute')

    if (exec_template_base == 'Load' or exec_template_base == 'Store'):
      memAccSizeTemplate = eval('LoadStoreMemAccSize')
    else:
      memAccSizeTemplate = eval('MiscMemAccSize')

    # (header_output, decoder_output, decode_block, exec_output)
    return (LoadStoreDeclare.subst(iop),
            EACompConstructor.subst(ea_iop)
            + MemAccConstructor.subst(memacc_iop)
            + LoadStoreConstructor.subst(iop),
	    decode_template.subst(iop),
            eaCompExecuteTemplate.subst(ea_iop)
            + memAccExecTemplate.subst(memacc_iop)
            + fullExecTemplate.subst(iop)
            + initiateAccTemplate.subst(iop)
            + completeAccTemplate.subst(iop)
	    + memAccSizeTemplate.subst(memacc_iop))
}};

output header {{
	std::string inst2string(MachInst machInst);
}};

output decoder {{

std::string inst2string(MachInst machInst)
{
    string str = "";
    uint32_t mask = 0x80000000;

    for(int i=0; i < 32; i++) {
	if ((machInst & mask) == 0) {
	    str += "0";
	} else {
	    str += "1";
	}

	mask = mask >> 1;
    }

    return str;
}

}};