xref: /gem5/src/arch/mips/isa/formats/util.isa

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

let {{
def UncondCtrlBase(name, Name, base_class, npc_expr, flags):
    # Declare basic control transfer w/o link (i.e. link reg is R31)
    nolink_code = 'NPC = %s;\n' % npc_expr
    nolink_iop = InstObjParams(name, Name, base_class,
                               CodeBlock(nolink_code), flags)
    header_output = BasicDeclare.subst(nolink_iop)
    decoder_output = BasicConstructor.subst(nolink_iop)
    exec_output = BasicExecute.subst(nolink_iop)

    # Generate declaration of '*AndLink' version, append to decls
    link_code = 'Ra = NPC & ~3;\n' + nolink_code
    link_iop = InstObjParams(name, Name + 'AndLink', base_class,
                             CodeBlock(link_code), flags)
    header_output += BasicDeclare.subst(link_iop)
    decoder_output += BasicConstructor.subst(link_iop)
    exec_output += BasicExecute.subst(link_iop)

    # need to use link_iop for the decode template since it is expecting
    # the shorter version of class_name (w/o "AndLink")

    return (header_output, decoder_output,
            JumpOrBranchDecode.subst(nolink_iop), exec_output)
}};