# Copyright (C) 2022-2023 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/>.

# Check if the W registers have the expected size and if setting/fetching
# values from W registers works correctly for both big and little endian.

require is_aarch64_target

standard_testfile
if { [prepare_for_testing "failed to prepare" $testfile $srcfile {nodebug}]} {
    return -1
}

if ![runto_main] {
    untested "could not run to main"
    return -1
}

array set w_values {
    0 0x0
    1 0x10
    2 0x2010
    3 0x302010
    4 0x40302010
    5 0x40302010
    6 0x40302010
    7 0x40302010
    8 0x40302010
}

array set x_values {
    0 0x0
    1 0x10
    2 0x2010
    3 0x302010
    4 0x40302010
    5 0x5040302010
    6 0x605040302010
    7 0x70605040302010
    8 0x8070605040302010
}

# Exercise various things for register w<rn>

proc test_register { rn } {
    gdb_test "ptype \$w${rn}" "type = uint32_t"
    gdb_test "p sizeof(\$w${rn})" " = 4"

    # Set all bits of x<rn>
    gdb_test_no_output "set \$x${rn}=0xffffffffffffffff" \
		       "set all bits of x${rn}"

    # Test setting/fetching values
    for {set i 0} {$i < 9} {incr i} {
	global w_values
	global x_values

	with_test_prefix "set w${rn} to $x_values($i)" {
	    # Set value of W and see the effects on W and X.
	    gdb_test_no_output "set \$w${rn}=$x_values($i)"
	    gdb_test "p/x \$w${rn}" "= $w_values($i)"
	    gdb_test "p/x \$x${rn}" "= $w_values($i)"
	}

	with_test_prefix "set x${rn} to $x_values($i)" {
	    # Set value of X and see the effects on W and X.
	    gdb_test_no_output "set \$x${rn}=$x_values($i)"
	    gdb_test "p/x \$w${rn}" "= $w_values($i)"
	    gdb_test "p/x \$x${rn}" "= $x_values($i)"

	    # Set all bits of x<rn>
	    gdb_test_no_output "set \$x${rn}=0xffffffffffffffff" \
			       "set all bits of x${rn}"
	}
    }
}

# Run tests
foreach_with_prefix endian {"little" "big"} {
    gdb_test "set endian ${endian}" "The target is set to ${endian} endian\."

    for {set i 0} {$i < 31} {incr i} {
	test_register $i
    }
}