xref: /netbsd-src/external/gpl3/gdb.old/dist/gdb/testsuite/gdb.arch/ppc-dfp.exp (revision b2c35e17b976cf7ccd7250c86c6f5e95090ed636) 
1# Copyright (C) 2008-2020 Free Software Foundation, Inc.
2#
3# This program is free software; you can redistribute it and/or modify
4# it under the terms of the GNU General Public License as published by
5# the Free Software Foundation; either version 3 of the License, or
6# (at your option) any later version.
7#
8# This program is distributed in the hope that it will be useful,
9# but WITHOUT ANY WARRANTY; without even the implied warranty of
10# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11# GNU General Public License for more details.
12#
13# You should have received a copy of the GNU General Public License
14# along with this program.  If not, see <http://www.gnu.org/licenses/>.
15#
16
17# Tests for Powerpc Decimal Floating Point registers setting and fetching
18
19if ![istarget "powerpc*"] then {
20    verbose "Skipping powerpc decimal floating point register tests."
21    return
22}
23
24standard_testfile
25
26if [get_compiler_info] {
27    warning "get_compiler failed"
28    return -1
29}
30
31if ![test_compiler_info gcc*] {
32    # We use GCC's extended asm syntax
33    warning "unknown compiler"
34    return -1
35}
36
37if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {quiet debug}] != "" } {
38    unsupported "this machine doesn't support Decimal Floating Point."
39    return -1
40}
41
42# Start with a fresh gdb.
43
44gdb_exit
45gdb_start
46gdb_reinitialize_dir $srcdir/$subdir
47gdb_load ${binfile}
48
49gdb_breakpoint [gdb_get_line_number "Set DFP rounding mode."]
50
51gdb_run_cmd
52
53# When the prompt comes back we'll be at the Set DFP rounding mode breakpoint.
54# Unless the program bails out after checking AT_HWCAP.
55gdb_expect {
56  -re "$inferior_exited_re with code 01.\[\r\n\]+$gdb_prompt $" {
57    unsupported "this machine doesn't support Decimal Floating Point."
58    return -1
59  }
60
61  -re ".*$gdb_prompt $" {}
62}
63
64# First, verify if FPSCR is all zeroes.
65gdb_test "print \$fpscr" " = 0" "FPSCR is all zeroes"
66
67# Step over "set rounding mode" instruction.
68gdb_test "next" "" ""
69
70# Verify that the following bits are set (See Power ISA for details):
71#
72# 29:31 - DFP Rounding Control
73gdb_test "print/t \$fpscr" " = 10100000000000000000000000000000000" "FPSCR for round to nearest, ties toward zero rounding mode"
74