Solaris Distro support for i386 and X64

I'm looking at publicly available Solaris distros and trying to determine what support each architecture. Can anyone comment if these support i386 (32-bit) and/or X64 (64-bit)? Oracle Site: https://www.oracle.com/solaris/solaris10/downloads/solaris10-get-jsp-downloads.html Illumos: https://dlc.openindiana.org/isos/hipster/20161030/ I'm asking because I have some older software that needs to be compiled with 32-bit support only.