gdb/testsuite/gdb.dwarf2/dw2-bfloat16.exp

   1 # Copyright 2021-2022 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 # This test checks if GDB can identify bfloat16 and IEEE half float types and
  17 # print them correctly.
  18 #
  19 load_lib dwarf.exp
  20
  21 # This test can only be run on targets which support DWARF-2 and use gas.
  22 if {![dwarf2_support]} {
  23     return 0
  24 }
  25
  26 standard_testfile main.c -dw.S
  27
  28 # Make some DWARF for the test.
  29 # 0x4049 is the equivalent of 3.141 for bfloat16.
  30 # 0x4248 is the equivalent of 3.1406 for IEEE half float.
  31 set asm_file [standard_output_file $srcfile2]
  32 Dwarf::assemble $asm_file {
  33     global srcdir subdir srcfile
  34
  35     cu {} {
  36         DW_TAG_compile_unit {
  37                 {DW_AT_language @DW_LANG_C}
  38                 {DW_AT_name     $srcfile}
  39                 {DW_AT_comp_dir /tmp}
  40         } {
  41             declare_labels bf16_type fp16_type \
  42                 bf16_var fp16_var
  43
  44             bf16_type: DW_TAG_base_type {
  45                 {DW_AT_name __bf16}
  46                 {encoding @DW_ATE_float}
  47                 {DW_AT_byte_size 2 DW_FORM_sdata}
  48             }
  49
  50             fp16_type: DW_TAG_base_type {
  51                 {DW_AT_name __fp16}
  52                 {encoding @DW_ATE_float}
  53                 {DW_AT_byte_size 2 DW_FORM_sdata}
  54             }
  55
  56             bf16_var: DW_TAG_variable {
  57                 {DW_AT_name "bf16_1"}
  58                 {DW_AT_type :${bf16_type}}
  59                 {DW_AT_const_value 0x4049 DW_FORM_sdata}
  60             }
  61
  62             fp16_var: DW_TAG_variable {
  63                 {DW_AT_name "fp16_1"}
  64                 {DW_AT_type :${fp16_type}}
  65                 {DW_AT_const_value 0x4248 DW_FORM_sdata}
  66             }
  67         }
  68     }
  69 }
  70
  71 if { [prepare_for_testing "failed to prepare" ${testfile} \
  72           [list $srcfile $asm_file] {nodebug}] } {
  73     return -1
  74 }
  75
  76 if ![runto_main] {
  77     return -1
  78 }
  79
  80 # Make sure we can print both types correctly.
  81 gdb_test "print bf16_1" " = 3.141"
  82 gdb_test "print fp16_1" " = 3.1406"