# Copyright 2009 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/>.

# This file is part of the gdb testsuite.

if $tracelevel {
    strace $tracelevel
}

set prms_id 0
set bug_id 0

if ![istarget "i?86-*linux*"] then {
    verbose "Skipping i387 reverse float tests."
    return
}

set testfile "i387-float-reverse"
set srcfile ${testfile}.c
set binfile ${objdir}/${subdir}/${testfile}

# some targets have leading underscores on assembly symbols.
# TODO: detect this automatically
set additional_flags ""
if [istarget "i?86-*-cygwin*"] then {
  set additional_flags "additional_flags=-DSYMBOL_PREFIX=\"_\""
}

if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable [list debug $additional_flags]] != "" } {
    untested i387-float-reverse
    return -1
}

# Get things started.

gdb_exit
gdb_start
gdb_reinitialize_dir $srcdir/$subdir
gdb_load ${binfile}
runto main

# Record to end of main

set location [gdb_get_line_number "END I387-FLOAT-REVERSE"]
gdb_test "record" "" "Turn on process record"
gdb_test "until $location" ".*/$srcfile:$location.*" \
    "record to end of main"

# Now rewind to beginning so we can begin testing.

set location [gdb_get_line_number "BEGIN I387-FLOAT-REVERSE"]
gdb_test "set exec-dir reverse" "" "set reverse direction"
gdb_test "until $location" ".*/$srcfile:$location.*" \
    "rewind to beginning of main"
gdb_test "set exec-dir forward" "" "set forward direction"

# Test st0 register

set location [gdb_get_line_number "test st0 register"]
gdb_test "until $location" ".*/$srcfile:$location.*asm.*fldz.*" \
    "begin test st0"
gdb_test "stepi" "asm.*fld1.*"            "set st0 == 0"
gdb_test "info register st0" "st0 *0\t.*" "verify st0 == 0"
gdb_test "stepi" "asm.*nop.*"             "set st0 == 1"
gdb_test "info register st0" "st0 *1\t.*" "verify st0 == 1"

# Now step backward, and check that st0 value reverts to zero.

gdb_test "reverse-stepi" "asm.*fld1.*"    "undo set st0 == 1"
gdb_test "info register st0" "st0 *0\t.*" "verify st0 == 0 again"