# Copyright 2021 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/>.


# Test to confirm that gdb is properly single stepping over the
# displaced addpcis instruction.
# The addpcis instruction and its extended mnemonics lnia and subpcis
# apply an immediate shifted value (X || 0x0000) to the current PC/NIA
# value, and store that value into the instructions target register.
# When the instruction is displaced, it needs special handling.

# lnia Rx == addpcis Rx,0
# subcis Rx,value == addpcis Rx,-value

if { ![istarget powerpc*-*] } {
    verbose "Skipping powerpc addpcis test."
    return
}

set retval 0

standard_testfile .s

if { [prepare_for_testing "failed to prepare" $testfile "$srcfile" \
      {debug quiet}] } {
    return -1
}

if ![runto_main] then {
      return
}

set check_pc [get_hexadecimal_valueof "\$pc" "default0"]
set bp1 *$check_pc+4
set bp2 *$check_pc+12
set bp3 *$check_pc+16
gdb_breakpoint $bp1
gdb_breakpoint $bp2
gdb_breakpoint $bp3

gdb_test "stepi" "" "set r3 "
set check_r3 [get_hexadecimal_valueof "\$r3" "default0"]
gdb_test "stepi" "" "set r4"
set check_r4 [get_hexadecimal_valueof "\$r4" "default0"]
gdb_test "stepi" "" "set r5"
set check_r5 [get_hexadecimal_valueof "\$r5" "default0"]
gdb_test "stepi" "" "set r6"
set check_r6 [get_hexadecimal_valueof "\$r6" "default0"]
gdb_test "stepi" "" "set r7"
set check_r7 [get_hexadecimal_valueof "\$r7" "default0"]
gdb_test "stepi" "" "set r8"
set check_r8 [get_hexadecimal_valueof "\$r8" "default0"]
gdb_test "stepi" "" "set r9"
set check_r9 [get_hexadecimal_valueof "\$r9" "default0"]

# R6 will contain the reference value.  All other
# instructions in this test will be storing values
# relative to what is stored in R6.

#	subpcis 3,+0x100 	# /* set r3 */
#	subpcis 4,+0x10		# /* set r4 */
#	subpcis 5,+0x1		# /* set r5 */
#	lnia    6		# /* set r6 */
#	addpcis 7,+0x1		# /* set r7 */
#	addpcis 8,+0x10		# /* set r8 */
#	addpcis 9,+0x100	# /* set r9 */

if [expr $check_r3 + 0x1000000   != $check_r6 - 0xc ] {
    fail "unexpected value r3 + 0x1,000,000 != r6 + 0xc ; r3: $check_r3  r6: $check_r6 "
}
if [expr $check_r4 + 0x100000  != $check_r6 - 0x8 ] {
    fail "unexpected value r4 + 0x100,000 != r6 - 0x8 ; r4: $check_r4  r6: $check_r6 "
}
if [expr $check_r5 + 0x10000  != $check_r6 - 0x4 ] {
    fail "unexpected value r5 + 0x10,000 != r6 , r5: $check_r5  r6: $check_r6 "
}
if [expr $check_r6 != $check_r6] {
    fail "unexpected value r6 != r6 , r6: $check_r6  r6: $check_r6 "
}
if [expr $check_r7 - 0x10000  != $check_r6 + 0x4] {
    fail "unexpected value r7 - 0x10,000 != r6 + 0x4 , r7: $check_r7  r7: $check_r6 "
}
if [expr $check_r8 - 0x100000  != $check_r6 + 0x8 ] {
    fail "unexpected value r8 - 0x100,000 != r6 , r8: $check_r8  r8: $check_r6 "
}
if [expr $check_r9 - 0x1000000  != $check_r6 + 0xc ] {
    fail "unexpected value r9 - 0x1,000,000 != r6 + 0xc , r9: $check_r9  r6: $check_r6 "
}

gdb_test "info break"
gdb_test "info register r3 r4 r5 r6 r7 r8 r9"
gdb_test "disas main"