xref: /gem5/src/arch/x86/isa/microasm.isa

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

// Copyright (c) 2007 The Hewlett-Packard Development Company
// All rights reserved.
//
// Redistribution and use of this software in source and binary forms,
// with or without modification, are permitted provided that the
// following conditions are met:
//
// The software must be used only for Non-Commercial Use which means any
// use which is NOT directed to receiving any direct monetary
// compensation for, or commercial advantage from such use.  Illustrative
// examples of non-commercial use are academic research, personal study,
// teaching, education and corporate research & development.
// Illustrative examples of commercial use are distributing products for
// commercial advantage and providing services using the software for
// commercial advantage.
//
// If you wish to use this software or functionality therein that may be
// covered by patents for commercial use, please contact:
//     Director of Intellectual Property Licensing
//     Office of Strategy and Technology
//     Hewlett-Packard Company
//     1501 Page Mill Road
//     Palo Alto, California  94304
//
// 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 HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.  No right of
// sublicense is granted herewith.  Derivatives of the software and
// output created using the software may be prepared, but only for
// Non-Commercial Uses.  Derivatives of the software may be shared with
// others provided: (i) the others agree to abide by the list of
// conditions herein which includes the Non-Commercial Use restrictions;
// and (ii) such Derivatives of the software include the above copyright
// notice to acknowledge the contribution from this software where
// applicable, this list of conditions and the disclaimer below.
//
// 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

//Include the definitions of the micro ops.
//These are python representations of static insts which stand on their own
//and make up an internal instruction set. They are used by the micro
//assembler.
##include "microops/microops.isa"

//Include code to build macroops in both C++ and python.
##include "macroop.isa"

let {{
    import sys
    sys.path[0:0] = ["src/arch/x86/isa/"]
    from insts import microcode
    # print microcode
    from micro_asm import MicroAssembler, Rom_Macroop, Rom
    mainRom = Rom('main ROM')
    assembler = MicroAssembler(X86Macroop, microopClasses, mainRom, Rom_Macroop)
    # Add in symbols for the microcode registers
    for num in range(15):
        assembler.symbols["t%d" % num] = "NUM_INTREGS+%d" % num
    for num in range(7):
        assembler.symbols["ufp%d" % num] = "FLOATREG_MICROFP(%d)" % num
    # Add in symbols for the segment descriptor registers
    for letter in ("C", "D", "E", "F", "G", "S"):
        assembler.symbols["%ss" % letter.lower()] = "SEGMENT_REG_%sS" % letter
    # Miscellaneous symbols
    symbols = {
        "reg" : "env.reg",
        "xmml" : "FLOATREG_XMM_LOW(env.reg)",
        "xmmh" : "FLOATREG_XMM_HIGH(env.reg)",
        "regm" : "env.regm",
        "xmmlm" : "FLOATREG_XMM_LOW(env.regm)",
        "xmmhm" : "FLOATREG_XMM_HIGH(env.regm)",
        "imm" : "IMMEDIATE",
        "disp" : "DISPLACEMENT",
        "seg" : "env.seg",
        "scale" : "env.scale",
        "index" : "env.index",
        "base" : "env.base",
        "dsz" : "env.dataSize",
        "asz" : "env.addressSize",
        "ssz" : "env.stackSize"
    }
    assembler.symbols.update(symbols)

    # Short hand for common scale-index-base combinations.
    assembler.symbols["sib"] = \
        [symbols["scale"], symbols["index"], symbols["base"]]
    assembler.symbols["riprel"] = \
        ["1", assembler.symbols["t0"], assembler.symbols["t7"]]

    for reg in ('ax', 'bx', 'cx', 'dx', 'sp', 'bp', 'si', 'di'):
        assembler.symbols["r%s" % reg] = "INTREG_R%s" % reg.upper()

    for flag in ('CF', 'PF', 'ECF', 'AF', 'EZF', 'ZF', 'SF', 'OF'):
        assembler.symbols[flag] = flag + "Bit"

    for cond in ('True', 'False', 'ECF', 'EZF', 'SZnZF',
                 'MSTRZ', 'STRZ', 'MSTRC',
                 'OF', 'CF', 'ZF', 'CvZF',
                 'SF', 'PF', 'SxOF', 'SxOvZF'):
        assembler.symbols["C%s" % cond] = "ConditionTests::%s" % cond
        assembler.symbols["nC%s" % cond] = "ConditionTests::Not%s" % cond
    assembler.symbols["CSTRZnEZF"] = "ConditionTests::STRZnEZF"
    assembler.symbols["CSTRnZnEZF"] = "ConditionTests::STRnZnEZF"

    assembler.symbols["CTrue"] = "ConditionTests::True"
    assembler.symbols["CFalse"] = "ConditionTests::False"

    # Code literal which forces a default 64 bit operand size in 64 bit mode.
    assembler.symbols["oszIn64Override"] = '''
    if (machInst.mode.submode == SixtyFourBitMode &&
            env.dataSize == 4)
        env.dataSize = 8;
    '''

    def labeler(labelStr):
        return "label_%s" % labelStr

    assembler.symbols["label"] = labeler

    def stack_index(index):
        return "(NUM_FLOATREGS + (%s))" % index

    assembler.symbols["st"] = stack_index

    macroopDict = assembler.assemble(microcode)
}};