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

   1 # Copyright (C) 2008-2023 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 floating point register setting and fetching
  18
  19 if {![istarget "powerpc*"]} {
  20     verbose "Skipping powerpc floating point register tests."
  21     return
  22 }
  23
  24 standard_testfile
  25
  26 if ![test_compiler_info gcc*] {
  27     # We use GCC's extended asm syntax
  28     warning "unknown compiler"
  29     return -1
  30 }
  31
  32 if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {quiet debug}] != "" } {
  33     verbose "Skipping FPSCR tests."
  34     return -1
  35 }
  36
  37 # Start with a fresh gdb.
  38
  39 gdb_exit
  40 gdb_start
  41 gdb_reinitialize_dir $srcdir/$subdir
  42 gdb_load ${binfile}
  43
  44 gdb_breakpoint [gdb_get_line_number "Invalid operation."]
  45 gdb_breakpoint [gdb_get_line_number "Division by zero."]
  46
  47 gdb_run_cmd
  48
  49 # When the prompt comes back we'll be in the invalid operation breakpoint.
  50 gdb_expect { -re ".*$gdb_prompt $" {} }
  51
  52 # First, verify if FPSCR exists and is all zeroes.
  53 gdb_test_multiple "print \$fpscr" "FPSCR exists" {
  54   -re " = 0\[\r\n\]+$gdb_prompt $" { pass "FPSCR is all zeroes" }
  55
  56   -re " = void\[\r\n\]+$gdb_prompt $" {
  57     # There's no FPSCR.  Skip this testcase.
  58     verbose "Skipping powerpc floating point register tests."
  59     return
  60   }
  61 }
  62
  63 # Step over invalid operation.
  64 gdb_test "next" "" "next over invalid operation"
  65
  66 # Verify that the following bits are set (See Power ISA for details):
  67 #
  68 # 32 - Floating-Point Exception Summary (FX)
  69 # 34 - Floating-Point Invalid Operation Summary (VX)
  70 # 42 - Floating-Point Invalid Operation Exception (VXZDZ)
  71 # 47 - Floating-Point Result Class Descriptor (C)
  72 # 51 - Floating-Point Unordered or NaN (FU or ?)
  73 gdb_test "print/t \$fpscr" " = 10100000001000010001000000000000" "FPSCR for invalid operation"
  74
  75 gdb_continue_to_breakpoint "go to division by zero"
  76
  77 # Step over division by zero.
  78 gdb_test "next" "" "next over division by zero"
  79
  80 # Verify that the following bits are set (See Power ISA for details):
  81 #
  82 # 32 - Floating-Point Exception Summary (FX)
  83 # 37 - Floating-Point Zero Divide Exception (ZX)
  84 # 49 - Floating-Point Greater Than or Positive (FG or >)
  85 # 51 - Floating-Point Unordered or NaN (FU or ?)
  86 gdb_test "print/t \$fpscr" " = 10000100000000000101000000000000" "FPSCR for division by zero"