gdb/testsuite/gdb.arch/ppc-dfp.exp

   1 # Copyright (C) 2008-2016 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
  19 if ![istarget "powerpc*"] then {
  20     verbose "Skipping powerpc decimal floating point register tests."
  21     return
  22 }
  23
  24 standard_testfile
  25
  26 if [get_compiler_info] {
  27     warning "get_compiler failed"
  28     return -1
  29 }
  30
  31 if ![test_compiler_info gcc*] {
  32     # We use GCC's extended asm syntax
  33     warning "unknown compiler"
  34     return -1
  35 }
  36
  37 if { [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
  44 gdb_exit
  45 gdb_start
  46 gdb_reinitialize_dir $srcdir/$subdir
  47 gdb_load ${binfile}
  48
  49 gdb_breakpoint [gdb_get_line_number "Set DFP rounding mode."]
  50
  51 gdb_run_cmd
  52
  53 # When the prompt comes back we'll be at the Set DFP rounding mode breakpoint.
  54 # Unless the program bails out after checking AT_HWCAP.
  55 gdb_expect {
  56   -re "$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.
  65 gdb_test "print \$fpscr" " = 0" "FPSCR is all zeroes"
  66
  67 # Step over "set rounding mode" instruction.
  68 gdb_test "next" "" ""
  69
  70 # Verify that the following bits are set (See Power ISA for details):
  71 #
  72 # 29:31 - DFP Rounding Control
  73 gdb_test "print/t \$fpscr" " = 10100000000000000000000000000000000" "FPSCR for round to nearest, ties toward zero rounding mode"