Probably you already executed the procedure to include i386 support to Linux:

$ sudo dpkg --add-architecture i386
$ apt-get update
$ sudo apt-get update
$ sudo apt-get install libc6-i386

Even yet your application still not running:

$ ./diehard
bash: ./diehard: No such file or directory

You can run this command to show the needed libraries:

$ objdump -p ./diehard | grep NEEDED
NEEDED libf2c.so.0
NEEDED libm.so.5
NEEDED libc.so.5

• BrainDamage