xref: /netbsd-src/external/gpl3/gdb.old/dist/gdb/testsuite/gdb.arch/ppc-dfp.exp (revision 212397c69a103ae7e5eafa8731ddfae671d2dee7) 
1# Copyright (C) 2008-2015 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
24set testfile "ppc-dfp"
25set binfile ${objdir}/${subdir}/${testfile}
26set srcfile ${testfile}.c
27
28if [get_compiler_info] {
29    warning "get_compiler failed"
30    return -1
31}
32
33if ![test_compiler_info gcc*] {
34    # We use GCC's extended asm syntax
35    warning "unknown compiler"
36    return -1
37}
38
39if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {quiet debug}] != "" } {
40    unsupported "This machine doesn't support Decimal Floating Point."
41    return -1
42}
43
44# Start with a fresh gdb.
45
46gdb_exit
47gdb_start
48gdb_reinitialize_dir $srcdir/$subdir
49gdb_load ${binfile}
50
51gdb_breakpoint [gdb_get_line_number "Set DFP rounding mode."]
52
53gdb_run_cmd
54
55# When the prompt comes back we'll be at the Set DFP rounding mode breakpoint.
56# Unless the program bails out after checking AT_HWCAP.
57gdb_expect {
58  -re "$inferior_exited_re with code 01.\[\r\n\]+$gdb_prompt $" {
59    unsupported "This machine doesn't support Decimal Floating Point."
60    return -1
61  }
62
63  -re ".*$gdb_prompt $" {}
64}
65
66# First, verify if FPSCR is all zeroes.
67gdb_test "print \$fpscr" " = 0" "FPSCR is all zeroes"
68
69# Step over "set rounding mode" instruction.
70gdb_test "next" "" ""
71
72# Verify that the following bits are set (See Power ISA for details):
73#
74# 29:31 - DFP Rounding Control
75gdb_test "print/t \$fpscr" " = 10100000000000000000000000000000000" "FPSCR for round to nearest, ties toward zero rounding mode"
76