An x64 program can do whatever it wants with its data be it source text, x64 or x32 objects/libs. So is this benchmark is comparing an toolchain of x32 binarie

An x64 program can do whatever it wants with its data be it source text, x64 or x32 objects/libs. So is this benchmark is comparing an toolchain of x32 binaries to a toolchain of x64 binaries? I assumed that it was cross-targeting.