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# Copyright (C) 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

# Miscellaneous CRIS simulator testcases in assembly code, testing
# dv-rv.c and dv-cris.c functions.

# Check whether dv-rv and dv-cris are present.

proc sim_has_rv_and_cris {} {
    global srcdir
    global subdir
    global SIMFLAGS
    global global_as_options
    global global_ld_options
    global global_sim_options

    # We need to assemble and link a trivial program and pass that, in
    # order to test successful exit.

    # A bit of duplication here for the assembling and linking part;
    # what we want to do it to run the simulator without affecting the
    # PASS/FAIL counters, and we can use e.g. run_sim_test for that.

    if ![info exists global_as_options] {
        set global_as_options ""
    }
    if ![info exists global_ld_options] {
        set global_ld_options ""
    }
    if ![info exists global_sim_options] {
        set global_sim_options ""
    }

    set comp_output [target_assemble $srcdir/$subdir/quit.s quit.o \
                         "-I$srcdir/$subdir $global_as_options"]

    if ![string match "" $comp_output] {
        verbose -log "$comp_output" 3
        fail "rv sim test setup (assembling)"
        return 0
    }

    set comp_output [target_link quit.o quit.x "$global_ld_options"]

    if ![string match "" $comp_output] {
        verbose -log "$comp_output" 3
        fail "rv sim test setup (linking)"
        return 0
    }

    set result \
        [sim_run quit.x \
             "$global_sim_options --hw-device rv --hw-device cris --hw-info" \
             "" "" ""]
    set return_code [lindex $result 0]
    set output [lindex $result 1]

    if { "$return_code" == "pass" } {
        return 1
    }

    return 0
}

# Similar to slurp_options, but lines are fixed format "^#r ..." (not
# "^#{ws}*r:{ws}+" to avoid intruding on slurp_options syntax).  Only
# trailing whitespace of the "..." is trimmed.  Beware that lines
# including parameters may not contain ":".

proc slurp_rv { file } {
    if [catch { set f [open $file r] } x] {
        #perror "couldn't open `$file': $x"
        perror "$x"
        return -1
    }
    set rv_array {}
    # whitespace expression
    set ws  {[  ]*}
    # whitespace is ignored at the end of a line.
    set pat "^#r (.*)$ws\$"
    # Allow arbitrary lines until the first option is seen.
    set seen_opt 0
    while { [gets $f line] != -1 } {
        set line [string trim $line]
        # Whitespace here is space-tab.
        if [regexp $pat $line xxx cmd] {
            # match!
            lappend rv_array $cmd
            set seen_opt 1
        } else {
            if { $seen_opt } {
                break
            }
        }
    }
    close $f
    return $rv_array
}

# The main test loop.

if [istarget cris*-*-*] {
    global ASFLAGS_FOR_TARGET
    set has_rv_and_cris [sim_has_rv_and_cris]
    global global_as_options
    global global_ld_options
    global global_sim_options

    set saved_global_sim_options $global_sim_options
    set saved_global_ld_options $global_ld_options
    set rvdummy "[file dirname [board_info target sim]]/rvdummy"

    # All machines we test and the corresponding assembler option.
    # We'll only ever test v10 and higher here.

    set combos {{"crisv10" "--march=v10 --no-mul-bug-abort"}
                {"crisv32" "--march=v32"}}

    # We need to pass different assembler flags for each machine.
    # Specifying it here rather than adding a specifier to each and every
    # test-file is preferrable.

    foreach combo $combos {
        set mach [lindex $combo 0]
        set ASFLAGS_FOR_TARGET "[lindex $combo 1]"

        # The .ms suffix is for "miscellaneous .s".
        foreach src [lsort [glob -nocomplain $srcdir/$subdir/*.ms]] {

            # If we're only testing specific files and this isn't one of them,
            # skip it.
            if ![runtest_file_p $runtests $src] {
                continue
            }

            # Whoever runs the test should be alerted that not all
            # testcases have been checked; that's why we do the loop
            # and don't just return at the top.
            if !$has_rv_and_cris {
                untested $src
                continue
            }

            set sim_defaults "--hw-file $srcdir/$subdir/std.dev"
            set ld_defaults "--section-start=.text=0"

            # We parse options an extra time besides in run_sim_test,
            # to determine if our defaults should be overridden.

            set opt_array [slurp_options $src]
            foreach i $opt_array {
                set opt_name [lindex $i 0]
                set opt_machs [lindex $i 1]
                set opt_val [lindex $i 2]

                # Allow concatenating to the default options by
                # specifying a mach.
                if { $opt_name == "sim" && $opt_machs == "" } {
                    set sim_defaults ""
                }

                if { $opt_name == "ld" && $opt_machs == "" } {
                    set ld_defaults ""
                }
            }

            set rvdummy_id -1
            set hostcmds [slurp_rv $src]

            if { $hostcmds != "" } {
                # I guess we could ask to have rvdummy executed on a
                # remote host, but it looks like too much trouble for
                # a feature rarely used.
                if [is_remote host] {
                    untested $src
                    continue
                }

                set src_components [file split $src]
                set rvfile "[lindex $src_components \
                            [expr [llength $src_components] - 1]].r"

                if [catch { set f [open $rvfile w] } x] {
                    error "$x"
                } {
                    set contents [join $hostcmds "\n"]

                    # Make it possible to use files from the test
                    # source directory; expected with the @-command.
                    regsub -all "@srcdir@" $contents "$srcdir/$subdir" contents

                    verbose "rv: $contents" 2
                    puts $f $contents
                    close $f
                }

                spawn -noecho $rvdummy "$rvfile"
                if { $spawn_id < 0 } {
                    error "Couldn't spawn $rvdummy"
                    continue
                }
                set rvdummy_id $spawn_id
            }

            # Unfortunately this seems like the only way to pass
            # additional sim, ld etc. options to run_sim_test.
            set global_sim_options "$saved_global_sim_options $sim_defaults"
            set global_ld_options "$saved_global_ld_options $ld_defaults"
            run_sim_test $src $mach
            set global_sim_options $saved_global_sim_options
            set global_ld_options $saved_global_ld_options

            # Stop the rvdummy, if it's still running.  We need to
            # wait on it anyway to avoid it turning into a zombie.
            if { $rvdummy_id != -1 } {
                close -i $rvdummy_id
                wait -i $rvdummy_id

                # Gleaned from framework.exp, this seems an indicator
                # to whether the test had expected outcome.  If so, we
                # want to remove the rv-file.
                if { $exit_status == 0 } {
                    file delete $rvfile
                }
            }
        }
    }
}