tests/od/od-float.sh

   1 #!/bin/sh
   2 # Test od on floating-point values.
   3
   4 # Copyright (C) 2010-2024 Free Software Foundation, Inc.
   5
   6 # This program is free software: you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation, either version 3 of the License, or
   9 # (at your option) any later version.
  10
  11 # This program is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 # GNU General Public License for more details.
  15
  16 # You should have received a copy of the GNU General Public License
  17 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
  18
  19 . "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
  20 print_ver_ od printf
  21
  22 export LC_ALL=C
  23
  24 # Test for a bug in coreutils up through 8.7: od was losing
  25 # information when asked to parse floating-point values.  The numeric
  26 # tests are valid only on Intel-like hosts, but that should be good
  27 # enough to detect regressions, as they are designed to succeed on
  28 # non-Intel-like hosts.  Also, test for another bug in coreutils 8.7
  29 # on x86: sometimes there was no space between the columns.
  30
  31 set x $(echo aaaabaaa | tr ab '\376\377' | od -t fF) ||
  32   fail=1
  33 case "$*" in
  34 *0-*) fail=1;;
  35 esac
  36 case $3,$4 in
  37 -1.694740e+38,-1.694740e+38) fail=1;;
  38 esac
  39
  40 set x $(echo aaaaaaaabaaaaaaa | tr ab '\376\377' | od -t fD) ||
  41   fail=1
  42 case "$*" in
  43 *0-*) fail=1;;
  44 esac
  45 case $3,$4 in
  46 -5.314010372517808e+303,-5.314010372517808e+303) fail=1;;
  47 esac
  48
  49 set x $(echo aaaaaaaaaaaaaaaabaaaaaaaaaaaaaaa | tr ab '\376\377' | od -t fL) ||
  50   fail=1
  51 case "$*" in
  52 *0-*) fail=1;;
  53 esac
  54 case $3,$4 in
  55 -1.023442870282055988e+4855,-1.023442870282055988e+4855) fail=1;;
  56 esac
  57
  58 # Ensure od doesn't crash as it did on glibc <= 2.5:
  59 # https://sourceware.org/bugzilla/show_bug.cgi?id=4586
  60 set x $(printf 00000000ff000000 | tr 0f '\000\377' | od -t fL) || fail=1
  61 # With coreutils <= 8.7 we used to print "nan" for the above invalid value.
  62 # However since v8.7-22-ga71c22f we deferred to the system printf routines
  63 # through the use of the ftoastr module.  So the following check would only
  64 # be valid on x86_64 if we again handle the conversion internally or
  65 # if this glibc bug is resolved:
  66 # https://sourceware.org/bugzilla/show_bug.cgi?id=17661
  67 #case "$*" in
  68 #*nan*) ;;
  69 #*) fail=1;;
  70 #esac
  71
  72 # Check Half precision IEEE 16 bit float
  73 if grep '^#define FLOAT16_SUPPORTED 1' "$CONFIG_HEADER" >/dev/null; then
  74   for fmt in '-tfH' '-tf2'; do
  75     od_out=$(env printf '\x3C\x00\x3C\x00' | od --end=big -An $fmt | tr -d ' ')
  76     test "$od_out" = '11' || fail=1
  77   done
  78 else
  79   echo "od: this system doesn't provide a 'fH' floating point type" > exp_err
  80   returns_ 1 od -tfH /dev/null 2>err || fail=1
  81   compare exp_err err || fail=1
  82 fi
  83 # Check Half precision Brain 16 bit float
  84 if grep '^#define BF16_SUPPORTED 1' "$CONFIG_HEADER" >/dev/null; then
  85   od_out=$(env printf '\x3F\x80\x3F\x80' | od --end=big -An -tfB | tr -d ' ')
  86   test "$od_out" = '11' || fail=1
  87 else
  88   echo "od: this system doesn't provide a 'fB' floating point type" > exp_err
  89   returns_ 1 od -tfB /dev/null 2>err || fail=1
  90   compare exp_err err || fail=1
  91 fi
  92
  93 Exit $fail