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

   1 # Copyright (C) 2008, 2009, 2010, 2011 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 $tracelevel then {
  20     strace $tracelevel
  21 }
  22
  23 if ![istarget "powerpc*"] then {
  24     verbose "Skipping powerpc decimal floating point register tests."
  25     return
  26 }
  27
  28 set testfile "ppc-dfp"
  29 set binfile ${objdir}/${subdir}/${testfile}
  30 set srcfile ${testfile}.c
  31
  32 if [get_compiler_info $binfile] {
  33     warning "get_compiler failed"
  34     return -1
  35 }
  36
  37 if ![test_compiler_info gcc*] {
  38     # We use GCC's extended asm syntax
  39     warning "unknown compiler"
  40     return -1
  41 }
  42
  43 if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {quiet debug}] != "" } {
  44     unsupported "This machine doesn't support Decimal Floating Point."
  45     return -1
  46 }
  47
  48 # Start with a fresh gdb.
  49
  50 gdb_exit
  51 gdb_start
  52 gdb_reinitialize_dir $srcdir/$subdir
  53 gdb_load ${binfile}
  54
  55 gdb_breakpoint [gdb_get_line_number "Set DFP rounding mode."]
  56
  57 gdb_run_cmd
  58
  59 # When the prompt comes back we'll be at the Set DFP rounding mode breakpoint.
  60 # Unless the program bails out after checking AT_HWCAP.
  61 gdb_expect {
  62   -re "Program exited with code 01.\[\r\n\]+$gdb_prompt $" {
  63     unsupported "This machine doesn't support Decimal Floating Point."
  64     return -1
  65   }
  66
  67   -re ".*$gdb_prompt $" {}
  68 }
  69
  70 # First, verify if FPSCR is all zeroes.
  71 gdb_test "print \$fpscr" " = 0" "FPSCR is all zeroes"
  72
  73 # Step over "set rounding mode" instruction.
  74 gdb_test "next" "" ""
  75
  76 # Verify that the following bits are set (See Power ISA for details):
  77 #
  78 # 29:31 - DFP Rounding Control
  79 gdb_test "print/t \$fpscr" " = 10100000000000000000000000000000000" "FPSCR for round to nearest, ties toward zero rounding mode"